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freebsd-skq/sys/amd64/isa/npx.c

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Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*-
* Copyright (c) 1990 William Jolitz.
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
ALL: Removed patch kit headers and rcsid strings, add $Id$. isa.c: Removed old #ifdef notyet isa_configure code, since it will never be used, and I have done 90% of what it attempted to. Add conflict checking code that searchs back through the devtab's looking for any device that has already been found that may conflict with what we are about to probe. Checks are mode for I/O address, memory address, IRQ, and DRQ. This should stop the screwing up of any device that has alread been found by other device probes. Print out messages when we are not going to probe a device due to a conflict so the user knows WHY something was not found. For example: aha0 not probed due to irq conflict with ahb0 at 11 Now print out a message when a device is not found so the user knows that it was probed for, but could not be found. For example: ed1 not found at 0x320 For devices that have I/O address < 0x100 say that they are on the motherboard, not on isa! The 0x100 magic number is per ISA spec. It may seem funny that pc0 and sc0 report as being on the motherboard, but this is due to the fact that the I/O address used is that of the keyboard controller which IS on the motherboard. We really need to split the keyboard probe from the display probe. It is completly legal to build a pc with out one or the other, or even with out both! npx.c: Return -1 from the probe routine if we are using the Emulator so that the i/o addresses are not printed, this is the same trick used for 486's. Do not print the ``Errors reported via Exception 16'', and ``Errors reported via IRQ 13'' messages any more, since these just lead to more user confusion that anything. It still prints the message ``Error reporting broken, using 387 emulator'' so that the person is aware that there mother board is ill.
1993-10-13 15:59:30 +00:00
* from: @(#)npx.c 7.2 (Berkeley) 5/12/91
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
*/
#include "npx.h"
#if NNPX > 0
Make the debug options new-style. This also zaps a DPT option from lint; it wasn't referenced from anywhere.
1998-01-31 07:23:16 +00:00
#include "opt_debug_npx.h"
Choose a different name to hold the option definition.. The original one was overlapping with another file, and making some undesirable behavior a little worse - it's triggering a bug in config that appears to have been there for some time (before the options files, anyway.)
1996-01-06 23:10:57 +00:00
#include "opt_math_emulate.h"
convert the math emulation to use the new-style options.
1996-01-04 19:51:50 +00:00
Change all #includes to follow the current Berkeley style. Some of these ``changes'' are actually not changes at all, but CVS sometimes has trouble telling the difference. This also includes support for second-directory compiles. This is not quite complete yet, as `config' doesn't yet do the right thing. You can still make it work trivially, however, by doing the following: rm /sys/compile mkdir /usr/obj/sys/compile ln -s M-. /sys/compile cd /sys/i386/conf config MYKERNEL cd ../../compile/MYKERNEL ln -s /sys @ rm machine ln -s @/i386/include machine make depend make
1994-08-13 03:50:34 +00:00
#include <sys/param.h>
#include <sys/systm.h>
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
#include <sys/bus.h>
Sorry, the last commit screwed up for me, this is the right one (I hope!) Please refer to the previous commit message about sysctl variables.
1995-10-28 13:07:28 +00:00
#include <sys/kernel.h>
Only use the i586-optimized copying and zeroing functions if they are actually faster (more than 20% faster for zeroing 1 MB at boot time). This fixes pessimized copying and zeroing on K6's and perhaps on other CPUs that are misclassified as i586's.
1998-02-12 21:41:10 +00:00
#include <sys/malloc.h>
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
#include <sys/module.h>
Sorry, the last commit screwed up for me, this is the right one (I hope!) Please refer to the previous commit message about sysctl variables.
1995-10-28 13:07:28 +00:00
#include <sys/sysctl.h>
Change all #includes to follow the current Berkeley style. Some of these ``changes'' are actually not changes at all, but CVS sometimes has trouble telling the difference. This also includes support for second-directory compiles. This is not quite complete yet, as `config' doesn't yet do the right thing. You can still make it work trivially, however, by doing the following: rm /sys/compile mkdir /usr/obj/sys/compile ln -s M-. /sys/compile cd /sys/i386/conf config MYKERNEL cd ../../compile/MYKERNEL ln -s /sys @ rm machine ln -s @/i386/include machine make depend make
1994-08-13 03:50:34 +00:00
#include <sys/proc.h>
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
#include <machine/bus.h>
#include <sys/rman.h>
Disabled logging of masked exceptions on exit. Keep the side effect of saving the state (see rev.1.17).
1997-01-29 13:46:28 +00:00
#ifdef NPX_DEBUG
Log processes that exit with an masked npx exception that would trap with the current default exception (un)mask. There should be no such processes unless you change the mask. Someday the mask should be changed to the IEEE default of everything masked. The npx state gets saved so that it can be checked and this may have the side effect of fixing a bug that was reported for 1.1.5. (npx exceptions may sometimes leak across exits and clobber another process. I can't see how this can happen.) Get some missing/wrong declarations from headers now that the headers have them.
1994-11-14 14:59:06 +00:00
#include <sys/syslog.h>
Disabled logging of masked exceptions on exit. Keep the side effect of saving the state (see rev.1.17).
1997-01-29 13:46:28 +00:00
#endif
Log processes that exit with an masked npx exception that would trap with the current default exception (un)mask. There should be no such processes unless you change the mask. Someday the mask should be changed to the IEEE default of everything masked. The npx state gets saved so that it can be checked and this may have the side effect of fixing a bug that was reported for 1.1.5. (npx exceptions may sometimes leak across exits and clobber another process. I can't see how this can happen.) Get some missing/wrong declarations from headers now that the headers have them.
1994-11-14 14:59:06 +00:00
#include <sys/signalvar.h>
Finished device configuration database work for all ISA devices (except `ze') and all SCSI devices (except that it's not done quite the way I want). New information added includes: - A text description of the device - A ``state''---unknown, unconfigured, idle, or busy - A generic parent device (with support in the m.i. code) - An interrupt mask type field (which will hopefully go away) so that . ``doconfig'' can be written This requires a new version of the `lsdev' program as well (next commit).
1994-10-23 21:28:03 +00:00
Removed an unused #included. Ifdefed #includes that are not used in the SMP case.
1997-11-18 11:32:31 +00:00
#ifndef SMP
Make the necessary changes so that an ELF kernel can be built. I have successfully built, booted, and run a number of different ELF kernel configurations, including GENERIC. LINT also builds and links cleanly, though I have not tried to boot it. The impact on developers is virtually nil, except for two things. All linker sets that might possibly be present in the kernel must be listed in "sys/i386/i386/setdefs.h". And all C symbols that are also referenced from assembly language code must be listed in "sys/i386/include/asnames.h". It so happens that failure to do these things will have no impact on the a.out kernel. But it will break the build of the ELF kernel. The ELF bootloader works, but it is not ready to commit quite yet.
1997-04-22 06:55:47 +00:00
#include <machine/asmacros.h>
Removed an unused #included. Ifdefed #includes that are not used in the SMP case.
1997-11-18 11:32:31 +00:00
#endif
Don't include <machine/cputypes.h> or declare cputype/class interfaces in <machine/cpu.h>. Moved the declarations to <machine/cputypes.h>. Fixed style bugs in the moved code. Fixed everything that depended on the nested include. Don't include <machine/cpu.h> (in the changed files) unless something in it is used directly.
1997-10-28 11:43:57 +00:00
#include <machine/cputypes.h>
#include <machine/frame.h>
Include file updates.. <machine/spl.h> -> <machine/ipl.h>, add <machine/ipl.h> to those files that were depending on getting SWI_* implicitly via <machine/cpufunc.h>
1997-05-31 09:27:31 +00:00
#include <machine/ipl.h>
Added #include of <machine/md_var.h>. This will be needed when some declarations are moved from <machine/cpufunc.h> to better places.
1996-06-25 20:31:01 +00:00
#include <machine/md_var.h>
Include file updates.. <machine/spl.h> -> <machine/ipl.h>, add <machine/ipl.h> to those files that were depending on getting SWI_* implicitly via <machine/cpufunc.h>
1997-05-31 09:27:31 +00:00
#include <machine/pcb.h>
Don't include <machine/cputypes.h> or declare cputype/class interfaces in <machine/cpu.h>. Moved the declarations to <machine/cputypes.h>. Fixed style bugs in the moved code. Fixed everything that depended on the nested include. Don't include <machine/cpu.h> (in the changed files) unless something in it is used directly.
1997-10-28 11:43:57 +00:00
#include <machine/psl.h>
Removed an unused #included. Ifdefed #includes that are not used in the SMP case.
1997-11-18 11:32:31 +00:00
#ifndef SMP
Log processes that exit with an masked npx exception that would trap with the current default exception (un)mask. There should be no such processes unless you change the mask. Someday the mask should be changed to the IEEE default of everything masked. The npx state gets saved so that it can be checked and this may have the side effect of fixing a bug that was reported for 1.1.5. (npx exceptions may sometimes leak across exits and clobber another process. I can't see how this can happen.) Get some missing/wrong declarations from headers now that the headers have them.
1994-11-14 14:59:06 +00:00
#include <machine/clock.h>
Removed an unused #included. Ifdefed #includes that are not used in the SMP case.
1997-11-18 11:32:31 +00:00
#endif
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
#include <machine/resource.h>
Change all #includes to follow the current Berkeley style. Some of these ``changes'' are actually not changes at all, but CVS sometimes has trouble telling the difference. This also includes support for second-directory compiles. This is not quite complete yet, as `config' doesn't yet do the right thing. You can still make it work trivially, however, by doing the following: rm /sys/compile mkdir /usr/obj/sys/compile ln -s M-. /sys/compile cd /sys/i386/conf config MYKERNEL cd ../../compile/MYKERNEL ln -s /sys @ rm machine ln -s @/i386/include machine make depend make
1994-08-13 03:50:34 +00:00
#include <machine/specialreg.h>
Don't include <machine/cputypes.h> or declare cputype/class interfaces in <machine/cpu.h>. Moved the declarations to <machine/cputypes.h>. Fixed style bugs in the moved code. Fixed everything that depended on the nested include. Don't include <machine/cpu.h> (in the changed files) unless something in it is used directly.
1997-10-28 11:43:57 +00:00
#include <machine/segments.h>
Finished device configuration database work for all ISA devices (except `ze') and all SCSI devices (except that it's not done quite the way I want). New information added includes: - A text description of the device - A ``state''---unknown, unconfigured, idle, or busy - A generic parent device (with support in the m.i. code) - An interrupt mask type field (which will hopefully go away) so that . ``doconfig'' can be written This requires a new version of the `lsdev' program as well (next commit).
1994-10-23 21:28:03 +00:00
Removed an unused #included. Ifdefed #includes that are not used in the SMP case.
1997-11-18 11:32:31 +00:00
#ifndef SMP
Change all #includes to follow the current Berkeley style. Some of these ``changes'' are actually not changes at all, but CVS sometimes has trouble telling the difference. This also includes support for second-directory compiles. This is not quite complete yet, as `config' doesn't yet do the right thing. You can still make it work trivially, however, by doing the following: rm /sys/compile mkdir /usr/obj/sys/compile ln -s M-. /sys/compile cd /sys/i386/conf config MYKERNEL cd ../../compile/MYKERNEL ln -s /sys @ rm machine ln -s @/i386/include machine make depend make
1994-08-13 03:50:34 +00:00
#include <i386/isa/icu.h>
Move interrupt handling code from isa.c to a new file. This should make isa.c (slightly) more portable and will make my life developing the really portable version much easier. Reviewed by: peter, fsmp
1997-06-02 08:19:06 +00:00
#include <i386/isa/intr_machdep.h>
Change all #includes to follow the current Berkeley style. Some of these ``changes'' are actually not changes at all, but CVS sometimes has trouble telling the difference. This also includes support for second-directory compiles. This is not quite complete yet, as `config' doesn't yet do the right thing. You can still make it work trivially, however, by doing the following: rm /sys/compile mkdir /usr/obj/sys/compile ln -s M-. /sys/compile cd /sys/i386/conf config MYKERNEL cd ../../compile/MYKERNEL ln -s /sys @ rm machine ln -s @/i386/include machine make depend make
1994-08-13 03:50:34 +00:00
#include <i386/isa/isa.h>
Removed an unused #included. Ifdefed #includes that are not used in the SMP case.
1997-11-18 11:32:31 +00:00
#endif
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* 387 and 287 Numeric Coprocessor Extension (NPX) Driver.
*/
Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on). This changes the default from off to on. The options have been in current for several months with no problems reported. Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option which went away too soon (flag 0x04 for npx0, defaulting to unset = on). Added a boot-time way to set the memory size (iosiz in config, iosize in userconfig for npx0). LINT: Removed old options. Documented npx0's flags and iosiz. options.i386: Removed old options. identcpu.c: Don't set the function pointers here. Setting them has to be delayed until after userconfig has had a chance to disable them and until after a good npx0 has been detected. machdep.c: Use npx0's iosize instead of MAXMEM if it is nonzero. support.s: Added vectors and glue code for copyin() and copyout(). Fixed ifdefs for i586_bzero(). Added ifdefs for i586_bcopy(). npx.c: Set the function pointers here. Clear hw_float when an npx exists but is too broken to use. Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
/* Configuration flags. */
#define NPX_DISABLE_I586_OPTIMIZED_BCOPY (1 << 0)
#define NPX_DISABLE_I586_OPTIMIZED_BZERO (1 << 1)
#define NPX_DISABLE_I586_OPTIMIZED_COPYIO (1 << 2)
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
#define NPX_PREFER_EMULATOR (1 << 3)
Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on). This changes the default from off to on. The options have been in current for several months with no problems reported. Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option which went away too soon (flag 0x04 for npx0, defaulting to unset = on). Added a boot-time way to set the memory size (iosiz in config, iosize in userconfig for npx0). LINT: Removed old options. Documented npx0's flags and iosiz. options.i386: Removed old options. identcpu.c: Don't set the function pointers here. Setting them has to be delayed until after userconfig has had a chance to disable them and until after a good npx0 has been detected. machdep.c: Use npx0's iosize instead of MAXMEM if it is nonzero. support.s: Added vectors and glue code for copyin() and copyout(). Fixed ifdefs for i586_bzero(). Added ifdefs for i586_bcopy(). npx.c: Set the function pointers here. Clear hw_float when an npx exists but is too broken to use. Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
#ifdef __GNUC__
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
#define fldcw(addr) __asm("fldcw %0" : : "m" (*(addr)))
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
#define fnclex() __asm("fnclex")
#define fninit() __asm("fninit")
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
#define fnop() __asm("fnop")
Finish supporting compiling with `gcc -ansi'. Fix missing `volatile's in __asm() statements while I'm here.
1998-04-15 18:58:09 +00:00
#define fnsave(addr) __asm __volatile("fnsave %0" : "=m" (*(addr)))
#define fnstcw(addr) __asm __volatile("fnstcw %0" : "=m" (*(addr)))
#define fnstsw(addr) __asm __volatile("fnstsw %0" : "=m" (*(addr)))
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
#define fp_divide_by_0() __asm("fldz; fld1; fdiv %st,%st(1); fnop")
#define frstor(addr) __asm("frstor %0" : : "m" (*(addr)))
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
#define start_emulating() __asm("smsw %%ax; orb %0,%%al; lmsw %%ax" \
: : "n" (CR0_TS) : "ax")
#define stop_emulating() __asm("clts")
#else /* not __GNUC__ */
void fldcw __P((caddr_t addr));
void fnclex __P((void));
void fninit __P((void));
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
void fnop __P((void));
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
void fnsave __P((caddr_t addr));
void fnstcw __P((caddr_t addr));
void fnstsw __P((caddr_t addr));
void fp_divide_by_0 __P((void));
void frstor __P((caddr_t addr));
void start_emulating __P((void));
void stop_emulating __P((void));
#endif /* __GNUC__ */
typedef u_char bool_t;
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
static int npx_attach __P((device_t dev));
void npx_intr __P((void *));
Add an identify method to allow npx to arrange itself to be attached to the nexus without explicit code in the nexus to do so.
1999-08-22 19:52:51 +00:00
static void npx_identify __P((driver_t *driver, device_t parent));
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
static int npx_probe __P((device_t dev));
static int npx_probe1 __P((device_t dev));
Ifdef declaration of a conditionally defined function "timezero".
1999-03-28 23:28:18 +00:00
#ifdef I586_CPU
Only use the i586-optimized copying and zeroing functions if they are actually faster (more than 20% faster for zeroing 1 MB at boot time). This fixes pessimized copying and zeroing on K6's and perhaps on other CPUs that are misclassified as i586's.
1998-02-12 21:41:10 +00:00
static long timezero __P((const char *funcname,
void (*func)(void *buf, size_t len)));
Ifdef declaration of a conditionally defined function "timezero".
1999-03-28 23:28:18 +00:00
#endif /* I586_CPU */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
int hw_float; /* XXX currently just alias for npx_exists */
Sorry, the last commit screwed up for me, this is the right one (I hope!) Please refer to the previous commit message about sysctl variables.
1995-10-28 13:07:28 +00:00
SYSCTL_INT(_hw,HW_FLOATINGPT, floatingpoint,
CTLFLAG_RD, &hw_float, 0,
"Floatingpoint instructions executed in hardware");
The "easy" fixes for compiling the kernel -Wunused: remove unreferenced static and local variables, goto labels, and functions declared but not defined.
1998-12-07 21:58:50 +00:00
#ifndef SMP
static u_int npx0_imask = SWI_CLOCK_MASK;
static struct gate_descriptor npx_idt_probeintr;
Moved the declaration of another non-SMP variable into the non-SMP section.
1998-12-14 19:16:17 +00:00
static int npx_intrno;
The "easy" fixes for compiling the kernel -Wunused: remove unreferenced static and local variables, goto labels, and functions declared but not defined.
1998-12-07 21:58:50 +00:00
static volatile u_int npx_intrs_while_probing;
static volatile u_int npx_traps_while_probing;
#endif
Preliminary support for per-cpu data pages. This eliminates a lot of #ifdef SMP type code. Things like _curproc reside in a data page that is unique on each cpu, eliminating the expensive macros like: #define curproc (SMPcurproc[cpunumber()]) There are some unresolved bootstrap and address space sharing issues at present, but Steve is waiting on this for other work. There is still some strictly temporary code present that isn't exactly pretty. This is part of a larger change that has run into some bumps, this part is standalone so it should be safe. The temporary code goes away when the full idle cpu support is finished. Reviewed by: fsmp, dyson
1997-06-22 16:04:22 +00:00
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
static bool_t npx_ex16;
static bool_t npx_exists;
static bool_t npx_irq13;
Don't hardcode IRQ 13 for NPX. It's as good as hardwired in the hardware though, on systems (386 mostly) that still have a seperate fpu, but it might be possible to find systems where the FPU coprocessor is wired to a different IRQ pin.
1999-05-15 17:58:58 +00:00
static int npx_irq; /* irq number */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
#ifndef SMP
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Special interrupt handlers. Someday intr0-intr15 will be used to count
* interrupts. We'll still need a special exception 16 handler. The busy
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
* latch stuff in probeintr() can be moved to npxprobe().
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
*/
Log processes that exit with an masked npx exception that would trap with the current default exception (un)mask. There should be no such processes unless you change the mask. Someday the mask should be changed to the IEEE default of everything masked. The npx state gets saved so that it can be checked and this may have the side effect of fixing a bug that was reported for 1.1.5. (npx exceptions may sometimes leak across exits and clobber another process. I can't see how this can happen.) Get some missing/wrong declarations from headers now that the headers have them.
1994-11-14 14:59:06 +00:00
inthand_t probeintr;
Support compiling with `gcc -pedantic' (don't use hard newlines in (asm) string constants or hard long long constants).
1998-04-19 15:39:26 +00:00
__asm(" \n\
.text \n\
.p2align 2,0x90 \n\
Fixed profiling of elf kernels. Made high resolution profiling compile for elf kernels (it is broken for all kernels due to lack of egcs support). Renaming of many assembler labels is avoided by declaring by declaring the labels that need to be visible to gprof as having type "function" and depending on the elf version of gprof being zealous about discarding the others. A few type declarations are still missing, mainly for SMP. PR: 9413 Submitted by: Assar Westerlund <assar@sics.se> (initial parts)
1999-05-06 09:44:57 +00:00
.type " __XSTRING(CNAME(probeintr)) ",@function \n\
Support compiling with `gcc -pedantic' (don't use hard newlines in (asm) string constants or hard long long constants).
1998-04-19 15:39:26 +00:00
" __XSTRING(CNAME(probeintr)) ": \n\
ss \n\
incl " __XSTRING(CNAME(npx_intrs_while_probing)) " \n\
pushl %eax \n\
movb $0x20,%al # EOI (asm in strings loses cpp features) \n\
outb %al,$0xa0 # IO_ICU2 \n\
outb %al,$0x20 # IO_ICU1 \n\
movb $0,%al \n\
outb %al,$0xf0 # clear BUSY# latch \n\
popl %eax \n\
iret \n\
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
");
Log processes that exit with an masked npx exception that would trap with the current default exception (un)mask. There should be no such processes unless you change the mask. Someday the mask should be changed to the IEEE default of everything masked. The npx state gets saved so that it can be checked and this may have the side effect of fixing a bug that was reported for 1.1.5. (npx exceptions may sometimes leak across exits and clobber another process. I can't see how this can happen.) Get some missing/wrong declarations from headers now that the headers have them.
1994-11-14 14:59:06 +00:00
inthand_t probetrap;
Support compiling with `gcc -pedantic' (don't use hard newlines in (asm) string constants or hard long long constants).
1998-04-19 15:39:26 +00:00
__asm(" \n\
.text \n\
.p2align 2,0x90 \n\
Fixed profiling of elf kernels. Made high resolution profiling compile for elf kernels (it is broken for all kernels due to lack of egcs support). Renaming of many assembler labels is avoided by declaring by declaring the labels that need to be visible to gprof as having type "function" and depending on the elf version of gprof being zealous about discarding the others. A few type declarations are still missing, mainly for SMP. PR: 9413 Submitted by: Assar Westerlund <assar@sics.se> (initial parts)
1999-05-06 09:44:57 +00:00
.type " __XSTRING(CNAME(probetrap)) ",@function \n\
Support compiling with `gcc -pedantic' (don't use hard newlines in (asm) string constants or hard long long constants).
1998-04-19 15:39:26 +00:00
" __XSTRING(CNAME(probetrap)) ": \n\
ss \n\
incl " __XSTRING(CNAME(npx_traps_while_probing)) " \n\
fnclex \n\
iret \n\
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
");
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
#endif /* SMP */
Add an identify method to allow npx to arrange itself to be attached to the nexus without explicit code in the nexus to do so.
1999-08-22 19:52:51 +00:00
/*
* Identify routine. Create a connection point on our parent for probing.
*/
static void
npx_identify(driver, parent)
driver_t *driver;
device_t parent;
{
device_t child;
child = BUS_ADD_CHILD(parent, 0, "npx", 0);
if (child == NULL)
panic("npx_identify");
}
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Probe routine. Initialize cr0 to give correct behaviour for [f]wait
* whether the device exists or not (XXX should be elsewhere). Set flags
* to tell npxattach() what to do. Modify device struct if npx doesn't
* need to use interrupts. Return 1 if device exists.
*/
static int
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
npx_probe(dev)
device_t dev;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
{
I'm not sure why the #ifdef SMP became #if 1 (this overrode the npx probe and always succeeded as is required on SMP). Anyway, reverting this still compiles and appears ok.
1999-05-06 12:47:21 +00:00
#ifdef SMP
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
Don't hardcode IRQ 13 for NPX. It's as good as hardwired in the hardware though, on systems (386 mostly) that still have a seperate fpu, but it might be possible to find systems where the FPU coprocessor is wired to a different IRQ pin.
1999-05-15 17:58:58 +00:00
if (resource_int_value("npx", 0, "irq", &npx_irq) != 0)
npx_irq = 13;
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
return npx_probe1(dev);
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
#else /* SMP */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
int result;
u_long save_eflags;
u_char save_icu1_mask;
u_char save_icu2_mask;
struct gate_descriptor save_idt_npxintr;
struct gate_descriptor save_idt_npxtrap;
/*
* This routine is now just a wrapper for npxprobe1(), to install
* special npx interrupt and trap handlers, to enable npx interrupts
* and to disable other interrupts. Someday isa_configure() will
* install suitable handlers and run with interrupts enabled so we
* won't need to do so much here.
*/
Don't hardcode IRQ 13 for NPX. It's as good as hardwired in the hardware though, on systems (386 mostly) that still have a seperate fpu, but it might be possible to find systems where the FPU coprocessor is wired to a different IRQ pin.
1999-05-15 17:58:58 +00:00
if (resource_int_value("npx", 0, "irq", &npx_irq) != 0)
npx_irq = 13;
npx_intrno = NRSVIDT + npx_irq;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
save_eflags = read_eflags();
disable_intr();
save_icu1_mask = inb(IO_ICU1 + 1);
save_icu2_mask = inb(IO_ICU2 + 1);
save_idt_npxintr = idt[npx_intrno];
save_idt_npxtrap = idt[16];
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
outb(IO_ICU1 + 1, ~IRQ_SLAVE);
Don't hardcode IRQ 13 for NPX. It's as good as hardwired in the hardware though, on systems (386 mostly) that still have a seperate fpu, but it might be possible to find systems where the FPU coprocessor is wired to a different IRQ pin.
1999-05-15 17:58:58 +00:00
outb(IO_ICU2 + 1, ~(1 << (npx_irq - 8)));
Implemented a (sorely needed for years) double fault handler to catch stack overflows. It sure would be nice if there was an unmapped page between the PCB and the stack (and that the size of the stack was configurable!). With the way things are now, the PCB will get clobbered before the double fault handler gets control, making somewhat of a mess of things. Despite this, it is still fairly easy to poke around in the overflowed stack to figure out the cause.
1995-12-19 14:30:50 +00:00
setidt(16, probetrap, SDT_SYS386TGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
setidt(npx_intrno, probeintr, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
npx_idt_probeintr = idt[npx_intrno];
enable_intr();
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
result = npx_probe1(dev);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
disable_intr();
outb(IO_ICU1 + 1, save_icu1_mask);
outb(IO_ICU2 + 1, save_icu2_mask);
idt[npx_intrno] = save_idt_npxintr;
idt[16] = save_idt_npxtrap;
write_eflags(save_eflags);
return (result);
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
#endif /* SMP */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
}
static int
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
npx_probe1(dev)
device_t dev;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
{
The "easy" fixes for compiling the kernel -Wunused: remove unreferenced static and local variables, goto labels, and functions declared but not defined.
1998-12-07 21:58:50 +00:00
#ifndef SMP
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
u_short control;
u_short status;
The "easy" fixes for compiling the kernel -Wunused: remove unreferenced static and local variables, goto labels, and functions declared but not defined.
1998-12-07 21:58:50 +00:00
#endif
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Partially reset the coprocessor, if any. Some BIOS's don't reset
* it after a warm boot.
*/
outb(0xf1, 0); /* full reset on some systems, NOP on others */
outb(0xf0, 0); /* clear BUSY# latch */
/*
* Prepare to trap all ESC (i.e., NPX) instructions and all WAIT
* instructions. We must set the CR0_MP bit and use the CR0_TS
* bit to control the trap, because setting the CR0_EM bit does
* not cause WAIT instructions to trap. It's important to trap
* WAIT instructions - otherwise the "wait" variants of no-wait
* control instructions would degenerate to the "no-wait" variants
* after FP context switches but work correctly otherwise. It's
* particularly important to trap WAITs when there is no NPX -
* otherwise the "wait" variants would always degenerate.
*
* Try setting CR0_NE to get correct error reporting on 486DX's.
* Setting it should fail or do nothing on lesser processors.
*/
load_cr0(rcr0() | CR0_MP | CR0_NE);
/*
* But don't trap while we're probing.
*/
stop_emulating();
/*
* Finish resetting the coprocessor, if any. If there is an error
* pending, then we may get a bogus IRQ13, but probeintr() will handle
* it OK. Bogus halts have never been observed, but we enabled
* IRQ13 and cleared the BUSY# latch early to handle them anyway.
*/
fninit();
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
I'm not sure why the #ifdef SMP became #if 1 (this overrode the npx probe and always succeeded as is required on SMP). Anyway, reverting this still compiles and appears ok.
1999-05-06 12:47:21 +00:00
#ifdef SMP
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
/*
* Exception 16 MUST work for SMP.
*/
npx_irq13 = 0;
npx_ex16 = hw_float = npx_exists = 1;
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
device_set_desc(dev, "math processor");
return (0);
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
#else /* !SMP */
device_set_desc(dev, "math processor");
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
Submitted by: seb@erix.ericsson.se (Sebastian Strollo) Remove over-cautious early fnop() synchronization. It caused the probe to hang on systems without an FPU.
1995-02-23 17:32:38 +00:00
/*
* Don't use fwait here because it might hang.
* Don't use fnop here because it usually hangs if there is no FPU.
*/
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
DELAY(1000); /* wait for any IRQ13 */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
#ifdef DIAGNOSTIC
if (npx_intrs_while_probing != 0)
printf("fninit caused %u bogus npx interrupt(s)\n",
npx_intrs_while_probing);
if (npx_traps_while_probing != 0)
printf("fninit caused %u bogus npx trap(s)\n",
npx_traps_while_probing);
#endif
/*
* Check for a status of mostly zero.
*/
status = 0x5a5a;
fnstsw(&status);
if ((status & 0xb8ff) == 0) {
/*
* Good, now check for a proper control word.
*/
Remove trailing whitespace.
1995-05-30 08:16:23 +00:00
control = 0x5a5a;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
fnstcw(&control);
if ((control & 0x1f3f) == 0x033f) {
Define new MIB variable, hw.floatingpoint, which is true if FP hardware is present, and false if an emulator is being used.
1994-09-09 23:13:03 +00:00
hw_float = npx_exists = 1;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* We have an npx, now divide by 0 to see if exception
* 16 works.
*/
control &= ~(1 << 2); /* enable divide by 0 trap */
fldcw(&control);
npx_traps_while_probing = npx_intrs_while_probing = 0;
fp_divide_by_0();
if (npx_traps_while_probing != 0) {
/*
* Good, exception 16 works.
*/
npx_ex16 = 1;
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
return (0);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
}
if (npx_intrs_while_probing != 0) {
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
int rid;
struct resource *r;
void *intr;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Bad, we are stuck with IRQ13.
*/
npx_irq13 = 1;
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
/*
Don't hardcode IRQ 13 for NPX. It's as good as hardwired in the hardware though, on systems (386 mostly) that still have a seperate fpu, but it might be possible to find systems where the FPU coprocessor is wired to a different IRQ pin.
1999-05-15 17:58:58 +00:00
* npxattach would be too late to set npx0_imask
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
*/
Don't hardcode IRQ 13 for NPX. It's as good as hardwired in the hardware though, on systems (386 mostly) that still have a seperate fpu, but it might be possible to find systems where the FPU coprocessor is wired to a different IRQ pin.
1999-05-15 17:58:58 +00:00
npx0_imask |= (1 << npx_irq);
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
/*
* We allocate these resources permanently,
* so there is no need to keep track of them.
*/
rid = 0;
r = bus_alloc_resource(dev, SYS_RES_IOPORT,
&rid, IO_NPX, IO_NPX,
IO_NPXSIZE, RF_ACTIVE);
if (r == 0)
panic("npx: can't get ports");
rid = 0;
r = bus_alloc_resource(dev, SYS_RES_IRQ,
Don't hardcode IRQ 13 for NPX. It's as good as hardwired in the hardware though, on systems (386 mostly) that still have a seperate fpu, but it might be possible to find systems where the FPU coprocessor is wired to a different IRQ pin.
1999-05-15 17:58:58 +00:00
&rid, npx_irq, npx_irq,
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
1, RF_ACTIVE);
if (r == 0)
panic("npx: can't get IRQ");
BUS_SETUP_INTR(device_get_parent(dev),
Move the declaration of the interrupt type from the driver structure to the BUS_SETUP_INTR call.
1999-05-08 21:59:43 +00:00
dev, r, INTR_TYPE_MISC,
npx_intr, 0, &intr);
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
if (intr == 0)
panic("npx: can't create intr");
return (0);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
}
/*
* Worse, even IRQ13 is broken. Use emulator.
*/
}
}
/*
* Probe failed, but we want to get to npxattach to initialize the
* emulator and say that it has been installed. XXX handle devices
* that aren't really devices better.
*/
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
return (0);
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
#endif /* SMP */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
}
/*
* Attach routine - announce which it is, and wire into system
*/
int
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
npx_attach(dev)
device_t dev;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
{
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
int flags;
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
if (resource_int_value("npx", 0, "flags", &flags) != 0)
flags = 0;
Initialize isa_devtab entries for interrupt handlers in individual device drivers, not in ioconf.c. Use a different hack in isa_device.h so that a new config(8) is not required yet. pc98 parts approved by: kato
1998-10-22 05:58:45 +00:00
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
device_print_prettyname(dev);
if (npx_irq13) {
printf("using IRQ 13 interface\n");
} else {
Remove trailing whitespace.
1995-05-30 08:16:23 +00:00
#if defined(MATH_EMULATE) || defined(GPL_MATH_EMULATE)
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
if (npx_ex16) {
if (!(flags & NPX_PREFER_EMULATOR))
printf("INT 16 interface\n");
else {
printf("FPU exists, but flags request "
"emulator\n");
hw_float = npx_exists = 0;
}
} else if (npx_exists) {
Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on). This changes the default from off to on. The options have been in current for several months with no problems reported. Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option which went away too soon (flag 0x04 for npx0, defaulting to unset = on). Added a boot-time way to set the memory size (iosiz in config, iosize in userconfig for npx0). LINT: Removed old options. Documented npx0's flags and iosiz. options.i386: Removed old options. identcpu.c: Don't set the function pointers here. Setting them has to be delayed until after userconfig has had a chance to disable them and until after a good npx0 has been detected. machdep.c: Use npx0's iosize instead of MAXMEM if it is nonzero. support.s: Added vectors and glue code for copyin() and copyout(). Fixed ifdefs for i586_bzero(). Added ifdefs for i586_bcopy(). npx.c: Set the function pointers here. Clear hw_float when an npx exists but is too broken to use. Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
printf("error reporting broken; using 387 emulator\n");
hw_float = npx_exists = 0;
} else
printf("387 emulator\n");
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
#else
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
if (npx_ex16) {
printf("INT 16 interface\n");
if (flags & NPX_PREFER_EMULATOR) {
printf("emulator requested, but none compiled "
"into kernel, using FPU\n");
}
} else
printf("no 387 emulator in kernel and no FPU!\n");
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
#endif
Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on). This changes the default from off to on. The options have been in current for several months with no problems reported. Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option which went away too soon (flag 0x04 for npx0, defaulting to unset = on). Added a boot-time way to set the memory size (iosiz in config, iosize in userconfig for npx0). LINT: Removed old options. Documented npx0's flags and iosiz. options.i386: Removed old options. identcpu.c: Don't set the function pointers here. Setting them has to be delayed until after userconfig has had a chance to disable them and until after a good npx0 has been detected. machdep.c: Use npx0's iosize instead of MAXMEM if it is nonzero. support.s: Added vectors and glue code for copyin() and copyout(). Fixed ifdefs for i586_bzero(). Added ifdefs for i586_bcopy(). npx.c: Set the function pointers here. Clear hw_float when an npx exists but is too broken to use. Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
}
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
npxinit(__INITIAL_NPXCW__);
Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on). This changes the default from off to on. The options have been in current for several months with no problems reported. Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option which went away too soon (flag 0x04 for npx0, defaulting to unset = on). Added a boot-time way to set the memory size (iosiz in config, iosize in userconfig for npx0). LINT: Removed old options. Documented npx0's flags and iosiz. options.i386: Removed old options. identcpu.c: Don't set the function pointers here. Setting them has to be delayed until after userconfig has had a chance to disable them and until after a good npx0 has been detected. machdep.c: Use npx0's iosize instead of MAXMEM if it is nonzero. support.s: Added vectors and glue code for copyin() and copyout(). Fixed ifdefs for i586_bzero(). Added ifdefs for i586_bcopy(). npx.c: Set the function pointers here. Clear hw_float when an npx exists but is too broken to use. Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
Only use the i586-optimized copying and zeroing functions if they are actually faster (more than 20% faster for zeroing 1 MB at boot time). This fixes pessimized copying and zeroing on K6's and perhaps on other CPUs that are misclassified as i586's.
1998-02-12 21:41:10 +00:00
#ifdef I586_CPU
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
if (cpu_class == CPUCLASS_586 && npx_ex16 && npx_exists &&
Only use the i586-optimized copying and zeroing functions if they are actually faster (more than 20% faster for zeroing 1 MB at boot time). This fixes pessimized copying and zeroing on K6's and perhaps on other CPUs that are misclassified as i586's.
1998-02-12 21:41:10 +00:00
timezero("i586_bzero()", i586_bzero) <
timezero("bzero()", bzero) * 4 / 5) {
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
if (!(flags & NPX_DISABLE_I586_OPTIMIZED_BCOPY)) {
Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on). This changes the default from off to on. The options have been in current for several months with no problems reported. Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option which went away too soon (flag 0x04 for npx0, defaulting to unset = on). Added a boot-time way to set the memory size (iosiz in config, iosize in userconfig for npx0). LINT: Removed old options. Documented npx0's flags and iosiz. options.i386: Removed old options. identcpu.c: Don't set the function pointers here. Setting them has to be delayed until after userconfig has had a chance to disable them and until after a good npx0 has been detected. machdep.c: Use npx0's iosize instead of MAXMEM if it is nonzero. support.s: Added vectors and glue code for copyin() and copyout(). Fixed ifdefs for i586_bzero(). Added ifdefs for i586_bcopy(). npx.c: Set the function pointers here. Clear hw_float when an npx exists but is too broken to use. Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
bcopy_vector = i586_bcopy;
ovbcopy_vector = i586_bcopy;
}
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
if (!(flags & NPX_DISABLE_I586_OPTIMIZED_BZERO))
Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on). This changes the default from off to on. The options have been in current for several months with no problems reported. Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option which went away too soon (flag 0x04 for npx0, defaulting to unset = on). Added a boot-time way to set the memory size (iosiz in config, iosize in userconfig for npx0). LINT: Removed old options. Documented npx0's flags and iosiz. options.i386: Removed old options. identcpu.c: Don't set the function pointers here. Setting them has to be delayed until after userconfig has had a chance to disable them and until after a good npx0 has been detected. machdep.c: Use npx0's iosize instead of MAXMEM if it is nonzero. support.s: Added vectors and glue code for copyin() and copyout(). Fixed ifdefs for i586_bzero(). Added ifdefs for i586_bcopy(). npx.c: Set the function pointers here. Clear hw_float when an npx exists but is too broken to use. Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
bzero = i586_bzero;
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
if (!(flags & NPX_DISABLE_I586_OPTIMIZED_COPYIO)) {
Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on). This changes the default from off to on. The options have been in current for several months with no problems reported. Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option which went away too soon (flag 0x04 for npx0, defaulting to unset = on). Added a boot-time way to set the memory size (iosiz in config, iosize in userconfig for npx0). LINT: Removed old options. Documented npx0's flags and iosiz. options.i386: Removed old options. identcpu.c: Don't set the function pointers here. Setting them has to be delayed until after userconfig has had a chance to disable them and until after a good npx0 has been detected. machdep.c: Use npx0's iosize instead of MAXMEM if it is nonzero. support.s: Added vectors and glue code for copyin() and copyout(). Fixed ifdefs for i586_bzero(). Added ifdefs for i586_bcopy(). npx.c: Set the function pointers here. Clear hw_float when an npx exists but is too broken to use. Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
copyin_vector = i586_copyin;
copyout_vector = i586_copyout;
}
}
#endif
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
return (0); /* XXX unused */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
}
/*
* Initialize floating point unit.
*/
void
npxinit(control)
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
u_short control;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
{
struct save87 dummy;
if (!npx_exists)
return;
/*
* fninit has the same h/w bugs as fnsave. Use the detoxified
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
* fnsave to throw away any junk in the fpu. npxsave() initializes
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
* the fpu and sets npxproc = NULL as important side effects.
*/
npxsave(&dummy);
stop_emulating();
fldcw(&control);
if (curpcb != NULL)
fnsave(&curpcb->pcb_savefpu);
start_emulating();
}
/*
* Free coprocessor (if we have it).
*/
void
npxexit(p)
struct proc *p;
{
Log processes that exit with an masked npx exception that would trap with the current default exception (un)mask. There should be no such processes unless you change the mask. Someday the mask should be changed to the IEEE default of everything masked. The npx state gets saved so that it can be checked and this may have the side effect of fixing a bug that was reported for 1.1.5. (npx exceptions may sometimes leak across exits and clobber another process. I can't see how this can happen.) Get some missing/wrong declarations from headers now that the headers have them.
1994-11-14 14:59:06 +00:00
if (p == npxproc)
npxsave(&curpcb->pcb_savefpu);
Disabled logging of masked exceptions on exit. Keep the side effect of saving the state (see rev.1.17).
1997-01-29 13:46:28 +00:00
#ifdef NPX_DEBUG
Log processes that exit with an masked npx exception that would trap with the current default exception (un)mask. There should be no such processes unless you change the mask. Someday the mask should be changed to the IEEE default of everything masked. The npx state gets saved so that it can be checked and this may have the side effect of fixing a bug that was reported for 1.1.5. (npx exceptions may sometimes leak across exits and clobber another process. I can't see how this can happen.) Get some missing/wrong declarations from headers now that the headers have them.
1994-11-14 14:59:06 +00:00
if (npx_exists) {
u_int masked_exceptions;
masked_exceptions = curpcb->pcb_savefpu.sv_env.en_cw
& curpcb->pcb_savefpu.sv_env.en_sw & 0x7f;
/*
Disabled logging of masked exceptions on exit. Keep the side effect of saving the state (see rev.1.17).
1997-01-29 13:46:28 +00:00
* Log exceptions that would have trapped with the old
* control word (overflow, divide by 0, and invalid operand).
Log processes that exit with an masked npx exception that would trap with the current default exception (un)mask. There should be no such processes unless you change the mask. Someday the mask should be changed to the IEEE default of everything masked. The npx state gets saved so that it can be checked and this may have the side effect of fixing a bug that was reported for 1.1.5. (npx exceptions may sometimes leak across exits and clobber another process. I can't see how this can happen.) Get some missing/wrong declarations from headers now that the headers have them.
1994-11-14 14:59:06 +00:00
*/
if (masked_exceptions & 0x0d)
log(LOG_ERR,
"pid %d (%s) exited with masked floating point exceptions 0x%02x\n",
p->p_pid, p->p_comm, masked_exceptions);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
}
Disabled logging of masked exceptions on exit. Keep the side effect of saving the state (see rev.1.17).
1997-01-29 13:46:28 +00:00
#endif
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
}
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
/*
* The following mechanism is used to ensure that the FPE_... value
* that is passed as a trapcode to the signal handler of the user
* process does not have more than one bit set.
*
* Multiple bits may be set if the user process modifies the control
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
* word while a status word bit is already set. While this is a sign
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
* of bad coding, we have no choise than to narrow them down to one
* bit, since we must not send a trapcode that is not exactly one of
* the FPE_ macros.
*
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
* The mechanism has a static table with 127 entries. Each combination
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
* of the 7 FPU status word exception bits directly translates to a
* position in this table, where a single FPE_... value is stored.
* This FPE_... value stored there is considered the "most important"
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
* of the exception bits and will be sent as the signal code. The
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
* precedence of the bits is based upon Intel Document "Numerical
* Applications", Chapter "Special Computational Situations".
*
* The macro to choose one of these values does these steps: 1) Throw
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
* away status word bits that cannot be masked. 2) Throw away the bits
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
* currently masked in the control word, assuming the user isn't
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
* interested in them anymore. 3) Reinsert status word bit 7 (stack
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
* fault) if it is set, which cannot be masked but must be presered.
* 4) Use the remaining bits to point into the trapcode table.
*
* The 6 maskable bits in order of their preference, as stated in the
* above referenced Intel manual:
* 1 Invalid operation (FP_X_INV)
* 1a Stack underflow
* 1b Stack overflow
* 1c Operand of unsupported format
* 1d SNaN operand.
* 2 QNaN operand (not an exception, irrelavant here)
* 3 Any other invalid-operation not mentioned above or zero divide
* (FP_X_INV, FP_X_DZ)
* 4 Denormal operand (FP_X_DNML)
* 5 Numeric over/underflow (FP_X_OFL, FP_X_UFL)
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
* 6 Inexact result (FP_X_IMP)
*/
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
static char fpetable[128] = {
0,
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
FPE_FLTINV, /* 1 - INV */
FPE_FLTUND, /* 2 - DNML */
FPE_FLTINV, /* 3 - INV | DNML */
FPE_FLTDIV, /* 4 - DZ */
FPE_FLTINV, /* 5 - INV | DZ */
FPE_FLTDIV, /* 6 - DNML | DZ */
FPE_FLTINV, /* 7 - INV | DNML | DZ */
FPE_FLTOVF, /* 8 - OFL */
FPE_FLTINV, /* 9 - INV | OFL */
FPE_FLTUND, /* A - DNML | OFL */
FPE_FLTINV, /* B - INV | DNML | OFL */
FPE_FLTDIV, /* C - DZ | OFL */
FPE_FLTINV, /* D - INV | DZ | OFL */
FPE_FLTDIV, /* E - DNML | DZ | OFL */
FPE_FLTINV, /* F - INV | DNML | DZ | OFL */
FPE_FLTUND, /* 10 - UFL */
FPE_FLTINV, /* 11 - INV | UFL */
FPE_FLTUND, /* 12 - DNML | UFL */
FPE_FLTINV, /* 13 - INV | DNML | UFL */
FPE_FLTDIV, /* 14 - DZ | UFL */
FPE_FLTINV, /* 15 - INV | DZ | UFL */
FPE_FLTDIV, /* 16 - DNML | DZ | UFL */
FPE_FLTINV, /* 17 - INV | DNML | DZ | UFL */
FPE_FLTOVF, /* 18 - OFL | UFL */
FPE_FLTINV, /* 19 - INV | OFL | UFL */
FPE_FLTUND, /* 1A - DNML | OFL | UFL */
FPE_FLTINV, /* 1B - INV | DNML | OFL | UFL */
FPE_FLTDIV, /* 1C - DZ | OFL | UFL */
FPE_FLTINV, /* 1D - INV | DZ | OFL | UFL */
FPE_FLTDIV, /* 1E - DNML | DZ | OFL | UFL */
FPE_FLTINV, /* 1F - INV | DNML | DZ | OFL | UFL */
FPE_FLTRES, /* 20 - IMP */
FPE_FLTINV, /* 21 - INV | IMP */
FPE_FLTUND, /* 22 - DNML | IMP */
FPE_FLTINV, /* 23 - INV | DNML | IMP */
FPE_FLTDIV, /* 24 - DZ | IMP */
FPE_FLTINV, /* 25 - INV | DZ | IMP */
FPE_FLTDIV, /* 26 - DNML | DZ | IMP */
FPE_FLTINV, /* 27 - INV | DNML | DZ | IMP */
FPE_FLTOVF, /* 28 - OFL | IMP */
FPE_FLTINV, /* 29 - INV | OFL | IMP */
FPE_FLTUND, /* 2A - DNML | OFL | IMP */
FPE_FLTINV, /* 2B - INV | DNML | OFL | IMP */
FPE_FLTDIV, /* 2C - DZ | OFL | IMP */
FPE_FLTINV, /* 2D - INV | DZ | OFL | IMP */
FPE_FLTDIV, /* 2E - DNML | DZ | OFL | IMP */
FPE_FLTINV, /* 2F - INV | DNML | DZ | OFL | IMP */
FPE_FLTUND, /* 30 - UFL | IMP */
FPE_FLTINV, /* 31 - INV | UFL | IMP */
FPE_FLTUND, /* 32 - DNML | UFL | IMP */
FPE_FLTINV, /* 33 - INV | DNML | UFL | IMP */
FPE_FLTDIV, /* 34 - DZ | UFL | IMP */
FPE_FLTINV, /* 35 - INV | DZ | UFL | IMP */
FPE_FLTDIV, /* 36 - DNML | DZ | UFL | IMP */
FPE_FLTINV, /* 37 - INV | DNML | DZ | UFL | IMP */
FPE_FLTOVF, /* 38 - OFL | UFL | IMP */
FPE_FLTINV, /* 39 - INV | OFL | UFL | IMP */
FPE_FLTUND, /* 3A - DNML | OFL | UFL | IMP */
FPE_FLTINV, /* 3B - INV | DNML | OFL | UFL | IMP */
FPE_FLTDIV, /* 3C - DZ | OFL | UFL | IMP */
FPE_FLTINV, /* 3D - INV | DZ | OFL | UFL | IMP */
FPE_FLTDIV, /* 3E - DNML | DZ | OFL | UFL | IMP */
FPE_FLTINV, /* 3F - INV | DNML | DZ | OFL | UFL | IMP */
FPE_FLTSUB, /* 40 - STK */
FPE_FLTSUB, /* 41 - INV | STK */
FPE_FLTUND, /* 42 - DNML | STK */
FPE_FLTSUB, /* 43 - INV | DNML | STK */
FPE_FLTDIV, /* 44 - DZ | STK */
FPE_FLTSUB, /* 45 - INV | DZ | STK */
FPE_FLTDIV, /* 46 - DNML | DZ | STK */
FPE_FLTSUB, /* 47 - INV | DNML | DZ | STK */
FPE_FLTOVF, /* 48 - OFL | STK */
FPE_FLTSUB, /* 49 - INV | OFL | STK */
FPE_FLTUND, /* 4A - DNML | OFL | STK */
FPE_FLTSUB, /* 4B - INV | DNML | OFL | STK */
FPE_FLTDIV, /* 4C - DZ | OFL | STK */
FPE_FLTSUB, /* 4D - INV | DZ | OFL | STK */
FPE_FLTDIV, /* 4E - DNML | DZ | OFL | STK */
FPE_FLTSUB, /* 4F - INV | DNML | DZ | OFL | STK */
FPE_FLTUND, /* 50 - UFL | STK */
FPE_FLTSUB, /* 51 - INV | UFL | STK */
FPE_FLTUND, /* 52 - DNML | UFL | STK */
FPE_FLTSUB, /* 53 - INV | DNML | UFL | STK */
FPE_FLTDIV, /* 54 - DZ | UFL | STK */
FPE_FLTSUB, /* 55 - INV | DZ | UFL | STK */
FPE_FLTDIV, /* 56 - DNML | DZ | UFL | STK */
FPE_FLTSUB, /* 57 - INV | DNML | DZ | UFL | STK */
FPE_FLTOVF, /* 58 - OFL | UFL | STK */
FPE_FLTSUB, /* 59 - INV | OFL | UFL | STK */
FPE_FLTUND, /* 5A - DNML | OFL | UFL | STK */
FPE_FLTSUB, /* 5B - INV | DNML | OFL | UFL | STK */
FPE_FLTDIV, /* 5C - DZ | OFL | UFL | STK */
FPE_FLTSUB, /* 5D - INV | DZ | OFL | UFL | STK */
FPE_FLTDIV, /* 5E - DNML | DZ | OFL | UFL | STK */
FPE_FLTSUB, /* 5F - INV | DNML | DZ | OFL | UFL | STK */
FPE_FLTRES, /* 60 - IMP | STK */
FPE_FLTSUB, /* 61 - INV | IMP | STK */
FPE_FLTUND, /* 62 - DNML | IMP | STK */
FPE_FLTSUB, /* 63 - INV | DNML | IMP | STK */
FPE_FLTDIV, /* 64 - DZ | IMP | STK */
FPE_FLTSUB, /* 65 - INV | DZ | IMP | STK */
FPE_FLTDIV, /* 66 - DNML | DZ | IMP | STK */
FPE_FLTSUB, /* 67 - INV | DNML | DZ | IMP | STK */
FPE_FLTOVF, /* 68 - OFL | IMP | STK */
FPE_FLTSUB, /* 69 - INV | OFL | IMP | STK */
FPE_FLTUND, /* 6A - DNML | OFL | IMP | STK */
FPE_FLTSUB, /* 6B - INV | DNML | OFL | IMP | STK */
FPE_FLTDIV, /* 6C - DZ | OFL | IMP | STK */
FPE_FLTSUB, /* 6D - INV | DZ | OFL | IMP | STK */
FPE_FLTDIV, /* 6E - DNML | DZ | OFL | IMP | STK */
FPE_FLTSUB, /* 6F - INV | DNML | DZ | OFL | IMP | STK */
FPE_FLTUND, /* 70 - UFL | IMP | STK */
FPE_FLTSUB, /* 71 - INV | UFL | IMP | STK */
FPE_FLTUND, /* 72 - DNML | UFL | IMP | STK */
FPE_FLTSUB, /* 73 - INV | DNML | UFL | IMP | STK */
FPE_FLTDIV, /* 74 - DZ | UFL | IMP | STK */
FPE_FLTSUB, /* 75 - INV | DZ | UFL | IMP | STK */
FPE_FLTDIV, /* 76 - DNML | DZ | UFL | IMP | STK */
FPE_FLTSUB, /* 77 - INV | DNML | DZ | UFL | IMP | STK */
FPE_FLTOVF, /* 78 - OFL | UFL | IMP | STK */
FPE_FLTSUB, /* 79 - INV | OFL | UFL | IMP | STK */
FPE_FLTUND, /* 7A - DNML | OFL | UFL | IMP | STK */
FPE_FLTSUB, /* 7B - INV | DNML | OFL | UFL | IMP | STK */
FPE_FLTDIV, /* 7C - DZ | OFL | UFL | IMP | STK */
FPE_FLTSUB, /* 7D - INV | DZ | OFL | UFL | IMP | STK */
FPE_FLTDIV, /* 7E - DNML | DZ | OFL | UFL | IMP | STK */
FPE_FLTSUB, /* 7F - INV | DNML | DZ | OFL | UFL | IMP | STK */
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
};
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
* Preserve the FP status word, clear FP exceptions, then generate a SIGFPE.
*
* Clearing exceptions is necessary mainly to avoid IRQ13 bugs. We now
* depend on longjmp() restoring a usable state. Restoring the state
* or examining it might fail if we didn't clear exceptions.
*
On FPU exceptions, pass a useful error code (one of the FPE_... macros) to the signal handler, for old-style BSD signal handlers as the second (int) argument, for SA_SIGINFO signal handlers as siginfo_t->si_code. This is source-compatible with Solaris, except that we have no <siginfo.h> (which isn't even mentioned in POSIX 1003.1b). An rather complete example program is at http://www3.cons.org/cracauer/freebsd-signal.c This will be added to the regression tests in src/. This commit also adds code to disable the (hardware) FPU from userconfig, so that you can use a software FP emulator on a machine that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
* The error code chosen will be one of the FPE_... macros. It will be
* sent as the second argument to old BSD-style signal handlers and as
* "siginfo_t->si_code" (second argument) to SA_SIGINFO signal handlers.
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
*
* XXX the FP state is not preserved across signal handlers. So signal
* handlers cannot afford to do FP unless they preserve the state or
* longjmp() out. Both preserving the state and longjmp()ing may be
* destroyed by IRQ13 bugs. Clearing FP exceptions is not an acceptable
* solution for signals other than SIGFPE.
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
*/
void
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
npx_intr(dummy)
void *dummy;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
{
int code;
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
u_short control;
Fix benign type mismatches in isa interrupt handlers. Many returned int instead of void.
1995-09-19 18:55:37 +00:00
struct intrframe *frame;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
if (npxproc == NULL || !npx_exists) {
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
printf("npxintr: npxproc = %p, curproc = %p, npx_exists = %d\n",
npxproc, curproc, npx_exists);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
panic("npxintr from nowhere");
}
if (npxproc != curproc) {
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
printf("npxintr: npxproc = %p, curproc = %p, npx_exists = %d\n",
npxproc, curproc, npx_exists);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
panic("npxintr from non-current process");
}
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
Undo the busy latch changes made in the previous revision. They broke some 386/387 systems. Don't print the IRQ number twice in the boot diagnostics.
1995-02-17 19:38:13 +00:00
outb(0xf0, 0);
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
fnstsw(&curpcb->pcb_savefpu.sv_ex_sw);
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
fnstcw(&control);
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
fnclex();
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Pass exception to process.
*/
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
frame = (struct intrframe *)&dummy; /* XXX */
Revert my previous commit about using CS_SECURE macro. Requested by: Bruce.
1997-08-21 06:33:04 +00:00
if ((ISPL(frame->if_cs) == SEL_UPL) || (frame->if_eflags & PSL_VM)) {
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Interrupt is essentially a trap, so we can afford to call
* the SIGFPE handler (if any) as soon as the interrupt
* returns.
*
* XXX little or nothing is gained from this, and plenty is
* lost - the interrupt frame has to contain the trap frame
* (this is otherwise only necessary for the rescheduling trap
* in doreti, and the frame for that could easily be set up
* just before it is used).
*/
Yet another place I missed when increasing trapframe size, which causes problem to SIGFPE handling. Reviewed by: Bruce Evans <bde@zeta.org.au>
1999-05-11 16:29:21 +00:00
curproc->p_md.md_regs = INTR_TO_TRAPFRAME(frame);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Encode the appropriate code for detailed information on
* this exception.
*/
Various formatting fixes on my FPE trapcode commit. Submitted by: BDE
1999-07-26 05:47:31 +00:00
code =
fpetable[(curpcb->pcb_savefpu.sv_ex_sw & ~control & 0x3f) |
(curpcb->pcb_savefpu.sv_ex_sw & 0x40)];
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
trapsignal(curproc, SIGFPE, code);
} else {
/*
* Nested interrupt. These losers occur when:
* o an IRQ13 is bogusly generated at a bogus time, e.g.:
* o immediately after an fnsave or frstor of an
* error state.
* o a couple of 386 instructions after
* "fstpl _memvar" causes a stack overflow.
* These are especially nasty when combined with a
* trace trap.
* o an IRQ13 occurs at the same time as another higher-
* priority interrupt.
*
* Treat them like a true async interrupt.
*/
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
psignal(curproc, SIGFPE);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
}
}
/*
* Implement device not available (DNA) exception
*
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
* It would be better to switch FP context here (if curproc != npxproc)
* and not necessarily for every context switch, but it is too hard to
* access foreign pcb's.
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
*/
int
npxdna()
{
if (!npx_exists)
return (0);
if (npxproc != NULL) {
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
printf("npxdna: npxproc = %p, curproc = %p\n",
npxproc, curproc);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
panic("npxdna");
}
stop_emulating();
/*
* Record new context early in case frstor causes an IRQ13.
*/
npxproc = curproc;
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
curpcb->pcb_savefpu.sv_ex_sw = 0;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* The following frstor may cause an IRQ13 when the state being
* restored has a pending error. The error will appear to have been
* triggered by the current (npx) user instruction even when that
* instruction is a no-wait instruction that should not trigger an
* error (e.g., fnclex). On at least one 486 system all of the
* no-wait instructions are broken the same as frstor, so our
* treatment does not amplify the breakage. On at least one
* 386/Cyrix 387 system, fnclex works correctly while frstor and
* fnsave are broken, so our treatment breaks fnclex if it is the
* first FPU instruction after a context switch.
*/
frstor(&curpcb->pcb_savefpu);
return (1);
}
/*
* Wrapper for fnsave instruction to handle h/w bugs. If there is an error
* pending, then fnsave generates a bogus IRQ13 on some systems. Force
* any IRQ13 to be handled immediately, and then ignore it. This routine is
* often called at splhigh so it must not use many system services. In
* particular, it's much easier to install a special handler than to
* guarantee that it's safe to use npxintr() and its supporting code.
*/
void
npxsave(addr)
struct save87 *addr;
{
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
#ifdef SMP
stop_emulating();
fnsave(addr);
/* fnop(); */
start_emulating();
npxproc = NULL;
#else /* SMP */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
u_char icu1_mask;
u_char icu2_mask;
u_char old_icu1_mask;
u_char old_icu2_mask;
struct gate_descriptor save_idt_npxintr;
disable_intr();
old_icu1_mask = inb(IO_ICU1 + 1);
old_icu2_mask = inb(IO_ICU2 + 1);
save_idt_npxintr = idt[npx_intrno];
New interrupt code from Bruce Evans. In additional to Bruce's attached list of changes, I've made the following additional changes: 1) i386/include/ipl.h renamed to spl.h as the name conflicts with the file of the same name in i386/isa/ipl.h. 2) changed all use of *mask (i.e. netmask, biomask, ttymask, etc) to *_imask (net_imask, etc). 3) changed vestige of splnet use in if_is to splimp. 4) got rid of "impmask" completely (Bruce had gotten rid of netmask), and are now using net_imask instead. 5) dozens of minor cruft to glue in Bruce's changes. These require changes I made to config(8) as well, and thus it must be rebuilt. -DG from Bruce Evans: sio: o No diff is supplied. Remove the define of setsofttty(). I hope that is enough. *.s: o i386/isa/debug.h no longer exists. The event counters became too much trouble to maintain. All function call entry and exception entry counters can be recovered by using profiling kernel (the new profiling supports all entry points; however, it is too slow to leave enabled all the time; it also). Only BDBTRAP() from debug.h is now used. That is moved to exception.s. It might be worth preserving SHOW_BITS() and calling it from _mcount() (if enabled). o T_ASTFLT is now only set just before calling trap(). o All exception handlers set SWI_AST_MASK in cpl as soon as possible after entry and arrange for _doreti to restore it atomically with exiting. It is not possible to set it atomically with entering the kernel, so it must be checked against the user mode bits in the trap frame before committing to using it. There is no place to store the old value of cpl for syscalls or traps, so there are some complications restoring it. Profiling stuff (mostly in *.s): o Changes to kern/subr_mcount.c, gcc and gprof are not supplied yet. o All interesting labels `foo' are renamed `_foo' and all uninteresting labels `_bar' are renamed `bar'. A small change to gprof allows ignoring labels not starting with underscores. o MCOUNT_LABEL() is to provide names for counters for times spent in exception handlers. o FAKE_MCOUNT() is a version of MCOUNT() suitable for exception handlers. Its arg is the pc where the exception occurred. The new mcount() pretends that this was a call from that pc to a suitable MCOUNT_LABEL(). o MEXITCOUNT is to turn off any timer started by MCOUNT(). /usr/src/sys/i386/i386/exception.s: o The non-BDB BPTTRAP() macros were doing a sti even when interrupts were disabled when the trap occurred. The sti (fixed) sti is actually a no-op unless you have my changes to machdep.c that make the debugger trap gates interrupt gates, but fixing that would make the ifdefs messier. ddb seems to be unharmed by both interrupts always disabled and always enabled (I had the branch in the fix back to front for some time :-(). o There is no known pushal bug. o tf_err can be left as garbage for syscalls. /usr/src/sys/i386/i386/locore.s: o Fix and update BDE_DEBUGGER support. o ENTRY(btext) before initialization was dangerous. o Warm boot shot was longer than intended. /usr/src/sys/i386/i386/machdep.c: o DON'T APPLY ALL OF THIS DIFF. It's what I'm using, but may require other changes. Use the following: o Remove aston() and setsoftclock(). Maybe use the following: o No netisr.h. o Spelling fix. o Delay to read the Rebooting message. o Fix for vm system unmapping a reduced area of memory after bounds_check_with_label() reduces the size of a physical i/o for a partition boundary. A similar fix is required in kern_physio.c. o Correct use of __CONCAT. It never worked here for non- ANSI cpp's. Is it time to drop support for non-ANSI? o gdt_segs init. 0xffffffffUL is bogus because ssd_limit is not 32 bits. The replacement may have the same value :-), but is more natural. o physmem was one page too low. Confusing variable names. Don't use the following: o Better numbers of buffers. Each 8K page requires up to 16 buffer headers. On my system, this results in 5576 buffers containing [up to] 2854912 bytes of memory. The usual allocation of about 384 buffers only holds 192K of disk if you use it on an fs with a block size of 512. o gdt changes for bdb. o *TGT -> *IDT changes for bdb. o #ifdefed changes for bdb. /usr/src/sys/i386/i386/microtime.s: o Use the correct asm macros. I think asm.h was copied from Mach just for microtime and isn't used now. It certainly doesn't belong in <sys>. Various macros are also duplicated in sys/i386/boot.h and libc/i386/*.h. o Don't switch to and from the IRR; it is guaranteed to be selected (default after ICU init and explicitly selected in isa.c too, and never changed until the old microtime clobbered it). /usr/src/sys/i386/i386/support.s: o Non-essential changes (none related to spls or profiling). o Removed slow loads of %gs again. The LDT support may require not relying on %gs, but loading it is not the way to fix it! Some places (copyin ...) forgot to load it. Loading it clobbers the user %gs. trap() still loads it after certain types of faults so that fuword() etc can rely on it without loading it explicitly. Exception handlers don't restore it. If we want to preserve the user %gs, then the fastest method is to not touch it except for context switches. Comparing with VM_MAXUSER_ADDRESS and branching takes only 2 or 4 cycles on a 486, while loading %gs takes 9 cycles and using it takes another. o Fixed a signed branch to unsigned. /usr/src/sys/i386/i386/swtch.s: o Move spl0() outside of idle loop. o Remove cli/sti from idle loop. sw1 does a cli, and in the unlikely event of an interrupt occurring and whichqs becoming zero, sw1 will just jump back to _idle. o There's no spl0() function in asm any more, so use splz(). o swtch() doesn't need to be superaligned, at least with the new mcounting. o Fixed a signed branch to unsigned. o Removed astoff(). /usr/src/sys/i386/i386/trap.c: o The decentralized extern decls were inconsistent, of course. o Fixed typo MATH_EMULTATE in comments. */ o Removed unused variables. o Old netmask is now impmask; print it instead. Perhaps we should print some of the new masks. o BTW, trap() should not print anything for normal debugger traps. /usr/src/sys/i386/include/asmacros.h: o DON'T APPLY ALL OF THIS DIFF. Just use some of the null macros as necessary. /usr/src/sys/i386/include/cpu.h: o CLKF_BASEPRI() changes since cpl == SWI_AST_MASK is now normal while the kernel is running. o Don't use var++ to set boolean variables. It fails after a mere 4G times :-) and is slower than storing a constant on [3-4]86s. /usr/src/sys/i386/include/cpufunc.h: o DON'T APPLY ALL OF THIS DIFF. You need mainly the include of <machine/ipl.h>. Unfortunately, <machine/ipl.h> is needed by almost everything for the inlines. /usr/src/sys/i386/include/ipl.h: o New file. Defines spl inlines and SWI macros and declares most variables related to hard and soft interrupt masks. /usr/src/sys/i386/isa/icu.h: o Moved definitions to <machine/ipl.h> /usr/src/sys/i386/isa/icu.s: o Software interrupts (SWIs) and delayed hardware interrupts (HWIs) are now handled uniformally, and dispatching them from splx() is more like dispatching them from _doreti. The dispatcher is essentially *(handler[ffs(ipending & ~cpl)](). o More care (not quite enough) is taken to avoid unbounded nesting of interrupts. o The interface to softclock() is changed so that a trap frame is not required. o Fast interrupt handlers are now handled more uniformally. Configuration is still too early (new handlers would require bits in <machine/ipl.h> and functions to vector.s). o splnnn() and splx() are no longer here; they are inline functions (could be macros for other compilers). splz() is the nontrivial part of the old splx(). /usr/src/sys/i386/isa/ipl.h o New file. Supposed to have only bus-dependent stuff. Perhaps the h/w masks should be declared here. /usr/src/sys/i386/isa/isa.c: o DON'T APPLY ALL OF THIS DIFF. You need only things involving *mask and *MASK and comments about them. netmask is now a pure software mask. It works like the softclock mask. /usr/src/sys/i386/isa/vector.s: o Reorganize AUTO_EOI* macros. o Option FAST_INTR_HANDLER_USERS_ES for people who don't trust fastintr handlers. o fastintr handlers need to metamorphose into ordinary interrupt handlers if their SWI bit has become set. Previously, sio had unintended latency for handling output completions and input of SLIP framing characters because this was not done. /usr/src/sys/net/netisr.h: o The machine-dependent stuff is now imported from <machine/ipl.h>. /usr/src/sys/sys/systm.h o DON'T APPLY ALL OF THIS DIFF. You need mainly the different splx() prototype. The spl*() prototypes are duplicated as inlines in <machine/ipl.h> but they need to be duplicated here in case there are no inlines. I sent systm.h and cpufunc.h to Garrett. We agree that spl0 should be replaced by splnone and not the other way around like I've done. /usr/src/sys/kern/kern_clock.c o splsoftclock() now lowers cpl so the direct call to softclock() works as intended. o softclock() interface changed to avoid passing the whole frame (some machines may need another change for profile_tick()). o profiling renamed _profiling to avoid ANSI namespace pollution. (I had to improve the mcount() interface and may as well fix it.) The GUPROF variant doesn't actually reference profiling here, but the 'U' in GUPROF should mean to select the microtimer mcount() and not change the interface.
1994-04-02 07:00:53 +00:00
outb(IO_ICU1 + 1, old_icu1_mask & ~(IRQ_SLAVE | npx0_imask));
outb(IO_ICU2 + 1, old_icu2_mask & ~(npx0_imask >> 8));
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
idt[npx_intrno] = npx_idt_probeintr;
enable_intr();
stop_emulating();
fnsave(addr);
Use sufficient parentheses in macros. Remove bogus input operands for fnsave(), fnstcw() and fnstsw(). Change all fwait's to fnop's. This might help avoid hardware bugs. Wait after fninit with an fnop. This should be safer now. Fix some spelling and formatting errors. Use natural sizes for control and status words (u_short, promotes to int). Don't clobber the SWI_CLOCK_MASK bits in npx0_imask when using IRQ13. Set the devconf state correctly (always busy, if configured). Improve code for npx_registerdev() a little (gcc can't keep id->id_unit in a register for some reason). Don't register a nonexistent npx device. Print a useful message in npxattach() again (delete references to errors and not the whole message). Don't print "387 emulator" if there is no emulator in the kernel. Use %p for pointers in error messages. Don't clobber the FPU state when there is an FPU exception. Just clear the exception flags (after saving the flags as before). This allows debuggers and SIGFPE handlers to look at the full exception state. SIGFPE handlers should normally return via longjmp(), which restores a good FPU state (as before). Returning from a SIGFPE handler may leave the FPU in the wrong state (as before). Clear the busy latch _after_ clearing the exception flags so that there is less chance of getting a bogus h/w interrupt for a control operation. Clear the saved exception status word when the next FPU instruction is excuted so that it doesn't stick around until the next exception. Clear the busy latch after fnsave() in npxsave() in case it was set when npxsave() was called.
1995-01-03 04:00:06 +00:00
fnop();
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
start_emulating();
npxproc = NULL;
disable_intr();
icu1_mask = inb(IO_ICU1 + 1); /* masks may have changed */
icu2_mask = inb(IO_ICU2 + 1);
outb(IO_ICU1 + 1,
New interrupt code from Bruce Evans. In additional to Bruce's attached list of changes, I've made the following additional changes: 1) i386/include/ipl.h renamed to spl.h as the name conflicts with the file of the same name in i386/isa/ipl.h. 2) changed all use of *mask (i.e. netmask, biomask, ttymask, etc) to *_imask (net_imask, etc). 3) changed vestige of splnet use in if_is to splimp. 4) got rid of "impmask" completely (Bruce had gotten rid of netmask), and are now using net_imask instead. 5) dozens of minor cruft to glue in Bruce's changes. These require changes I made to config(8) as well, and thus it must be rebuilt. -DG from Bruce Evans: sio: o No diff is supplied. Remove the define of setsofttty(). I hope that is enough. *.s: o i386/isa/debug.h no longer exists. The event counters became too much trouble to maintain. All function call entry and exception entry counters can be recovered by using profiling kernel (the new profiling supports all entry points; however, it is too slow to leave enabled all the time; it also). Only BDBTRAP() from debug.h is now used. That is moved to exception.s. It might be worth preserving SHOW_BITS() and calling it from _mcount() (if enabled). o T_ASTFLT is now only set just before calling trap(). o All exception handlers set SWI_AST_MASK in cpl as soon as possible after entry and arrange for _doreti to restore it atomically with exiting. It is not possible to set it atomically with entering the kernel, so it must be checked against the user mode bits in the trap frame before committing to using it. There is no place to store the old value of cpl for syscalls or traps, so there are some complications restoring it. Profiling stuff (mostly in *.s): o Changes to kern/subr_mcount.c, gcc and gprof are not supplied yet. o All interesting labels `foo' are renamed `_foo' and all uninteresting labels `_bar' are renamed `bar'. A small change to gprof allows ignoring labels not starting with underscores. o MCOUNT_LABEL() is to provide names for counters for times spent in exception handlers. o FAKE_MCOUNT() is a version of MCOUNT() suitable for exception handlers. Its arg is the pc where the exception occurred. The new mcount() pretends that this was a call from that pc to a suitable MCOUNT_LABEL(). o MEXITCOUNT is to turn off any timer started by MCOUNT(). /usr/src/sys/i386/i386/exception.s: o The non-BDB BPTTRAP() macros were doing a sti even when interrupts were disabled when the trap occurred. The sti (fixed) sti is actually a no-op unless you have my changes to machdep.c that make the debugger trap gates interrupt gates, but fixing that would make the ifdefs messier. ddb seems to be unharmed by both interrupts always disabled and always enabled (I had the branch in the fix back to front for some time :-(). o There is no known pushal bug. o tf_err can be left as garbage for syscalls. /usr/src/sys/i386/i386/locore.s: o Fix and update BDE_DEBUGGER support. o ENTRY(btext) before initialization was dangerous. o Warm boot shot was longer than intended. /usr/src/sys/i386/i386/machdep.c: o DON'T APPLY ALL OF THIS DIFF. It's what I'm using, but may require other changes. Use the following: o Remove aston() and setsoftclock(). Maybe use the following: o No netisr.h. o Spelling fix. o Delay to read the Rebooting message. o Fix for vm system unmapping a reduced area of memory after bounds_check_with_label() reduces the size of a physical i/o for a partition boundary. A similar fix is required in kern_physio.c. o Correct use of __CONCAT. It never worked here for non- ANSI cpp's. Is it time to drop support for non-ANSI? o gdt_segs init. 0xffffffffUL is bogus because ssd_limit is not 32 bits. The replacement may have the same value :-), but is more natural. o physmem was one page too low. Confusing variable names. Don't use the following: o Better numbers of buffers. Each 8K page requires up to 16 buffer headers. On my system, this results in 5576 buffers containing [up to] 2854912 bytes of memory. The usual allocation of about 384 buffers only holds 192K of disk if you use it on an fs with a block size of 512. o gdt changes for bdb. o *TGT -> *IDT changes for bdb. o #ifdefed changes for bdb. /usr/src/sys/i386/i386/microtime.s: o Use the correct asm macros. I think asm.h was copied from Mach just for microtime and isn't used now. It certainly doesn't belong in <sys>. Various macros are also duplicated in sys/i386/boot.h and libc/i386/*.h. o Don't switch to and from the IRR; it is guaranteed to be selected (default after ICU init and explicitly selected in isa.c too, and never changed until the old microtime clobbered it). /usr/src/sys/i386/i386/support.s: o Non-essential changes (none related to spls or profiling). o Removed slow loads of %gs again. The LDT support may require not relying on %gs, but loading it is not the way to fix it! Some places (copyin ...) forgot to load it. Loading it clobbers the user %gs. trap() still loads it after certain types of faults so that fuword() etc can rely on it without loading it explicitly. Exception handlers don't restore it. If we want to preserve the user %gs, then the fastest method is to not touch it except for context switches. Comparing with VM_MAXUSER_ADDRESS and branching takes only 2 or 4 cycles on a 486, while loading %gs takes 9 cycles and using it takes another. o Fixed a signed branch to unsigned. /usr/src/sys/i386/i386/swtch.s: o Move spl0() outside of idle loop. o Remove cli/sti from idle loop. sw1 does a cli, and in the unlikely event of an interrupt occurring and whichqs becoming zero, sw1 will just jump back to _idle. o There's no spl0() function in asm any more, so use splz(). o swtch() doesn't need to be superaligned, at least with the new mcounting. o Fixed a signed branch to unsigned. o Removed astoff(). /usr/src/sys/i386/i386/trap.c: o The decentralized extern decls were inconsistent, of course. o Fixed typo MATH_EMULTATE in comments. */ o Removed unused variables. o Old netmask is now impmask; print it instead. Perhaps we should print some of the new masks. o BTW, trap() should not print anything for normal debugger traps. /usr/src/sys/i386/include/asmacros.h: o DON'T APPLY ALL OF THIS DIFF. Just use some of the null macros as necessary. /usr/src/sys/i386/include/cpu.h: o CLKF_BASEPRI() changes since cpl == SWI_AST_MASK is now normal while the kernel is running. o Don't use var++ to set boolean variables. It fails after a mere 4G times :-) and is slower than storing a constant on [3-4]86s. /usr/src/sys/i386/include/cpufunc.h: o DON'T APPLY ALL OF THIS DIFF. You need mainly the include of <machine/ipl.h>. Unfortunately, <machine/ipl.h> is needed by almost everything for the inlines. /usr/src/sys/i386/include/ipl.h: o New file. Defines spl inlines and SWI macros and declares most variables related to hard and soft interrupt masks. /usr/src/sys/i386/isa/icu.h: o Moved definitions to <machine/ipl.h> /usr/src/sys/i386/isa/icu.s: o Software interrupts (SWIs) and delayed hardware interrupts (HWIs) are now handled uniformally, and dispatching them from splx() is more like dispatching them from _doreti. The dispatcher is essentially *(handler[ffs(ipending & ~cpl)](). o More care (not quite enough) is taken to avoid unbounded nesting of interrupts. o The interface to softclock() is changed so that a trap frame is not required. o Fast interrupt handlers are now handled more uniformally. Configuration is still too early (new handlers would require bits in <machine/ipl.h> and functions to vector.s). o splnnn() and splx() are no longer here; they are inline functions (could be macros for other compilers). splz() is the nontrivial part of the old splx(). /usr/src/sys/i386/isa/ipl.h o New file. Supposed to have only bus-dependent stuff. Perhaps the h/w masks should be declared here. /usr/src/sys/i386/isa/isa.c: o DON'T APPLY ALL OF THIS DIFF. You need only things involving *mask and *MASK and comments about them. netmask is now a pure software mask. It works like the softclock mask. /usr/src/sys/i386/isa/vector.s: o Reorganize AUTO_EOI* macros. o Option FAST_INTR_HANDLER_USERS_ES for people who don't trust fastintr handlers. o fastintr handlers need to metamorphose into ordinary interrupt handlers if their SWI bit has become set. Previously, sio had unintended latency for handling output completions and input of SLIP framing characters because this was not done. /usr/src/sys/net/netisr.h: o The machine-dependent stuff is now imported from <machine/ipl.h>. /usr/src/sys/sys/systm.h o DON'T APPLY ALL OF THIS DIFF. You need mainly the different splx() prototype. The spl*() prototypes are duplicated as inlines in <machine/ipl.h> but they need to be duplicated here in case there are no inlines. I sent systm.h and cpufunc.h to Garrett. We agree that spl0 should be replaced by splnone and not the other way around like I've done. /usr/src/sys/kern/kern_clock.c o splsoftclock() now lowers cpl so the direct call to softclock() works as intended. o softclock() interface changed to avoid passing the whole frame (some machines may need another change for profile_tick()). o profiling renamed _profiling to avoid ANSI namespace pollution. (I had to improve the mcount() interface and may as well fix it.) The GUPROF variant doesn't actually reference profiling here, but the 'U' in GUPROF should mean to select the microtimer mcount() and not change the interface.
1994-04-02 07:00:53 +00:00
(icu1_mask & ~npx0_imask) | (old_icu1_mask & npx0_imask));
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
outb(IO_ICU2 + 1,
New interrupt code from Bruce Evans. In additional to Bruce's attached list of changes, I've made the following additional changes: 1) i386/include/ipl.h renamed to spl.h as the name conflicts with the file of the same name in i386/isa/ipl.h. 2) changed all use of *mask (i.e. netmask, biomask, ttymask, etc) to *_imask (net_imask, etc). 3) changed vestige of splnet use in if_is to splimp. 4) got rid of "impmask" completely (Bruce had gotten rid of netmask), and are now using net_imask instead. 5) dozens of minor cruft to glue in Bruce's changes. These require changes I made to config(8) as well, and thus it must be rebuilt. -DG from Bruce Evans: sio: o No diff is supplied. Remove the define of setsofttty(). I hope that is enough. *.s: o i386/isa/debug.h no longer exists. The event counters became too much trouble to maintain. All function call entry and exception entry counters can be recovered by using profiling kernel (the new profiling supports all entry points; however, it is too slow to leave enabled all the time; it also). Only BDBTRAP() from debug.h is now used. That is moved to exception.s. It might be worth preserving SHOW_BITS() and calling it from _mcount() (if enabled). o T_ASTFLT is now only set just before calling trap(). o All exception handlers set SWI_AST_MASK in cpl as soon as possible after entry and arrange for _doreti to restore it atomically with exiting. It is not possible to set it atomically with entering the kernel, so it must be checked against the user mode bits in the trap frame before committing to using it. There is no place to store the old value of cpl for syscalls or traps, so there are some complications restoring it. Profiling stuff (mostly in *.s): o Changes to kern/subr_mcount.c, gcc and gprof are not supplied yet. o All interesting labels `foo' are renamed `_foo' and all uninteresting labels `_bar' are renamed `bar'. A small change to gprof allows ignoring labels not starting with underscores. o MCOUNT_LABEL() is to provide names for counters for times spent in exception handlers. o FAKE_MCOUNT() is a version of MCOUNT() suitable for exception handlers. Its arg is the pc where the exception occurred. The new mcount() pretends that this was a call from that pc to a suitable MCOUNT_LABEL(). o MEXITCOUNT is to turn off any timer started by MCOUNT(). /usr/src/sys/i386/i386/exception.s: o The non-BDB BPTTRAP() macros were doing a sti even when interrupts were disabled when the trap occurred. The sti (fixed) sti is actually a no-op unless you have my changes to machdep.c that make the debugger trap gates interrupt gates, but fixing that would make the ifdefs messier. ddb seems to be unharmed by both interrupts always disabled and always enabled (I had the branch in the fix back to front for some time :-(). o There is no known pushal bug. o tf_err can be left as garbage for syscalls. /usr/src/sys/i386/i386/locore.s: o Fix and update BDE_DEBUGGER support. o ENTRY(btext) before initialization was dangerous. o Warm boot shot was longer than intended. /usr/src/sys/i386/i386/machdep.c: o DON'T APPLY ALL OF THIS DIFF. It's what I'm using, but may require other changes. Use the following: o Remove aston() and setsoftclock(). Maybe use the following: o No netisr.h. o Spelling fix. o Delay to read the Rebooting message. o Fix for vm system unmapping a reduced area of memory after bounds_check_with_label() reduces the size of a physical i/o for a partition boundary. A similar fix is required in kern_physio.c. o Correct use of __CONCAT. It never worked here for non- ANSI cpp's. Is it time to drop support for non-ANSI? o gdt_segs init. 0xffffffffUL is bogus because ssd_limit is not 32 bits. The replacement may have the same value :-), but is more natural. o physmem was one page too low. Confusing variable names. Don't use the following: o Better numbers of buffers. Each 8K page requires up to 16 buffer headers. On my system, this results in 5576 buffers containing [up to] 2854912 bytes of memory. The usual allocation of about 384 buffers only holds 192K of disk if you use it on an fs with a block size of 512. o gdt changes for bdb. o *TGT -> *IDT changes for bdb. o #ifdefed changes for bdb. /usr/src/sys/i386/i386/microtime.s: o Use the correct asm macros. I think asm.h was copied from Mach just for microtime and isn't used now. It certainly doesn't belong in <sys>. Various macros are also duplicated in sys/i386/boot.h and libc/i386/*.h. o Don't switch to and from the IRR; it is guaranteed to be selected (default after ICU init and explicitly selected in isa.c too, and never changed until the old microtime clobbered it). /usr/src/sys/i386/i386/support.s: o Non-essential changes (none related to spls or profiling). o Removed slow loads of %gs again. The LDT support may require not relying on %gs, but loading it is not the way to fix it! Some places (copyin ...) forgot to load it. Loading it clobbers the user %gs. trap() still loads it after certain types of faults so that fuword() etc can rely on it without loading it explicitly. Exception handlers don't restore it. If we want to preserve the user %gs, then the fastest method is to not touch it except for context switches. Comparing with VM_MAXUSER_ADDRESS and branching takes only 2 or 4 cycles on a 486, while loading %gs takes 9 cycles and using it takes another. o Fixed a signed branch to unsigned. /usr/src/sys/i386/i386/swtch.s: o Move spl0() outside of idle loop. o Remove cli/sti from idle loop. sw1 does a cli, and in the unlikely event of an interrupt occurring and whichqs becoming zero, sw1 will just jump back to _idle. o There's no spl0() function in asm any more, so use splz(). o swtch() doesn't need to be superaligned, at least with the new mcounting. o Fixed a signed branch to unsigned. o Removed astoff(). /usr/src/sys/i386/i386/trap.c: o The decentralized extern decls were inconsistent, of course. o Fixed typo MATH_EMULTATE in comments. */ o Removed unused variables. o Old netmask is now impmask; print it instead. Perhaps we should print some of the new masks. o BTW, trap() should not print anything for normal debugger traps. /usr/src/sys/i386/include/asmacros.h: o DON'T APPLY ALL OF THIS DIFF. Just use some of the null macros as necessary. /usr/src/sys/i386/include/cpu.h: o CLKF_BASEPRI() changes since cpl == SWI_AST_MASK is now normal while the kernel is running. o Don't use var++ to set boolean variables. It fails after a mere 4G times :-) and is slower than storing a constant on [3-4]86s. /usr/src/sys/i386/include/cpufunc.h: o DON'T APPLY ALL OF THIS DIFF. You need mainly the include of <machine/ipl.h>. Unfortunately, <machine/ipl.h> is needed by almost everything for the inlines. /usr/src/sys/i386/include/ipl.h: o New file. Defines spl inlines and SWI macros and declares most variables related to hard and soft interrupt masks. /usr/src/sys/i386/isa/icu.h: o Moved definitions to <machine/ipl.h> /usr/src/sys/i386/isa/icu.s: o Software interrupts (SWIs) and delayed hardware interrupts (HWIs) are now handled uniformally, and dispatching them from splx() is more like dispatching them from _doreti. The dispatcher is essentially *(handler[ffs(ipending & ~cpl)](). o More care (not quite enough) is taken to avoid unbounded nesting of interrupts. o The interface to softclock() is changed so that a trap frame is not required. o Fast interrupt handlers are now handled more uniformally. Configuration is still too early (new handlers would require bits in <machine/ipl.h> and functions to vector.s). o splnnn() and splx() are no longer here; they are inline functions (could be macros for other compilers). splz() is the nontrivial part of the old splx(). /usr/src/sys/i386/isa/ipl.h o New file. Supposed to have only bus-dependent stuff. Perhaps the h/w masks should be declared here. /usr/src/sys/i386/isa/isa.c: o DON'T APPLY ALL OF THIS DIFF. You need only things involving *mask and *MASK and comments about them. netmask is now a pure software mask. It works like the softclock mask. /usr/src/sys/i386/isa/vector.s: o Reorganize AUTO_EOI* macros. o Option FAST_INTR_HANDLER_USERS_ES for people who don't trust fastintr handlers. o fastintr handlers need to metamorphose into ordinary interrupt handlers if their SWI bit has become set. Previously, sio had unintended latency for handling output completions and input of SLIP framing characters because this was not done. /usr/src/sys/net/netisr.h: o The machine-dependent stuff is now imported from <machine/ipl.h>. /usr/src/sys/sys/systm.h o DON'T APPLY ALL OF THIS DIFF. You need mainly the different splx() prototype. The spl*() prototypes are duplicated as inlines in <machine/ipl.h> but they need to be duplicated here in case there are no inlines. I sent systm.h and cpufunc.h to Garrett. We agree that spl0 should be replaced by splnone and not the other way around like I've done. /usr/src/sys/kern/kern_clock.c o splsoftclock() now lowers cpl so the direct call to softclock() works as intended. o softclock() interface changed to avoid passing the whole frame (some machines may need another change for profile_tick()). o profiling renamed _profiling to avoid ANSI namespace pollution. (I had to improve the mcount() interface and may as well fix it.) The GUPROF variant doesn't actually reference profiling here, but the 'U' in GUPROF should mean to select the microtimer mcount() and not change the interface.
1994-04-02 07:00:53 +00:00
(icu2_mask & ~(npx0_imask >> 8))
| (old_icu2_mask & (npx0_imask >> 8)));
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
idt[npx_intrno] = save_idt_npxintr;
enable_intr(); /* back to usual state */
Made the SMP case ignore the possibility of an INT13 interface. This eliminates all the APIC code, and thus several routines that would otherwise need to be made MP-safe. Reviewed by: Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +00:00
#endif /* SMP */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
}
Only use the i586-optimized copying and zeroing functions if they are actually faster (more than 20% faster for zeroing 1 MB at boot time). This fixes pessimized copying and zeroing on K6's and perhaps on other CPUs that are misclassified as i586's.
1998-02-12 21:41:10 +00:00
#ifdef I586_CPU
static long
timezero(funcname, func)
const char *funcname;
void (*func) __P((void *buf, size_t len));
{
void *buf;
#define BUFSIZE 1000000
long usec;
struct timeval finish, start;
buf = malloc(BUFSIZE, M_TEMP, M_NOWAIT);
if (buf == NULL)
return (BUFSIZE);
microtime(&start);
(*func)(buf, BUFSIZE);
microtime(&finish);
usec = 1000000 * (finish.tv_sec - start.tv_sec) +
finish.tv_usec - start.tv_usec;
if (usec <= 0)
usec = 1;
if (bootverbose)
printf("%s bandwidth = %ld bytes/sec\n",
Support compiling with `gcc -pedantic' (don't use hard newlines in (asm) string constants or hard long long constants).
1998-04-19 15:39:26 +00:00
funcname, (long)(BUFSIZE * (int64_t)1000000 / usec));
Only use the i586-optimized copying and zeroing functions if they are actually faster (more than 20% faster for zeroing 1 MB at boot time). This fixes pessimized copying and zeroing on K6's and perhaps on other CPUs that are misclassified as i586's.
1998-02-12 21:41:10 +00:00
free(buf, M_TEMP);
return (usec);
}
#endif /* I586_CPU */
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
static device_method_t npx_methods[] = {
/* Device interface */
Add an identify method to allow npx to arrange itself to be attached to the nexus without explicit code in the nexus to do so.
1999-08-22 19:52:51 +00:00
DEVMETHOD(device_identify, npx_identify),
Bring the 'new-bus' to the i386. This extensively changes the way the i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
1999-04-16 21:22:55 +00:00
DEVMETHOD(device_probe, npx_probe),
DEVMETHOD(device_attach, npx_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
{ 0, 0 }
};
static driver_t npx_driver = {
"npx",
npx_methods,
1, /* no softc */
};
static devclass_t npx_devclass;
/*
* We prefer to attach to the root nexus so that the usual case (exception 16)
* doesn't describe the processor as being `on isa'.
*/
DRIVER_MODULE(npx, nexus, npx_driver, npx_devclass, 0, 0);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
#endif /* NNPX > 0 */
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