Commit Graph

116 Commits

Author SHA1 Message Date
Warner Losh
e3cdd5e18c Hoist the MI compat_freebsd32 files up into files from files.*. 2012-10-25 04:30:48 +00:00
Attilio Rao
2e564269d0 Disconnect non-MPSAFE SMBFS from the build in preparation for dropping
GIANT from VFS. In addition, disconnect also netsmb, which is a base
requirement for SMBFS.

In the while SMBFS regular users can use FUSE interface and smbnetfs
port to work with their SMBFS partitions.

Also, there are ongoing efforts by vendor to support in-kernel smbfs,
so there are good chances that it will get relinked once properly locked.

This is not targeted for MFC.
2012-10-18 12:04:56 +00:00
Marcel Moolenaar
85e6303e05 Remove support for SKI: HP's Itanium simulator. It's pretty much not
used, serves very little value given that FreeBSD runs on real H/W
for a long time.
Note that SKI is open-source (see http://ski.sourceforge.net), so
if there's interest and value again, then this code can be revived.

Discussed with: jhb
2012-08-18 22:59:06 +00:00
Marcel Moolenaar
662d34aff2 Hide the creation of phys_avail behind an API to make it easier to do it
correctly. We now iterate the EFI memory descriptors once and collect all
the information in a single pass. This includes:
1.  The I/O port base address,
2.  The PAL memory region. Have the physmem API track this.
3.  Memory descriptors of memory we can't use, like bad memory, runtime
    services code & data, etc. Have the physmem API track these.
4.  memory descriptors of memory we can use or re-use, such as free
    memory, boot time services code & data, loader code & data, etc.
    These are added by the physmem API.

Since the PBVM page table and pages are in memory described as loader
data, inform the physmem API of chunks that need to be delated from the
available physical memory.

While here, remove Maxmem and replace it with the better named paddr_max.
Maxmem was defined as physmem, which is generally wrong. Now, paddr_max
is properly defined as the largesty physical address.

The upshot of all this is that:
1.  We properly determine realmem.
2.  We maximize physmem by re-using memory where possible.
3.  We remove complexity from ia64_init() in machdep.c.
4.  Remove confusion about realmem, physmem & Maxmem.

The new ia64_physmem_alloc() is to replace pmap_steal_memory() in pmap.c,
as well as replace the handcrafted allocation of the VHPT for the BSP in
pmap_bootstrap() in pmap.c. This is step 2 and addresses the manipulation
of phys_avail after it is being created.
2012-07-07 00:25:17 +00:00
Konstantin Belousov
aea810386d Implement mechanism to export some kernel timekeeping data to
usermode, using shared page.  The structures and functions have vdso
prefix, to indicate the intended location of the code in some future.

The versioned per-algorithm data is exported in the format of struct
vdso_timehands, which mostly repeats the content of in-kernel struct
timehands. Usermode reading of the structure can be lockless.
Compatibility export for 32bit processes on 64bit host is also
provided. Kernel also provides usermode with indication about
currently used timecounter, so that libc can fall back to syscall if
configured timecounter is unknown to usermode code.

The shared data updates are initiated both from the tc_windup(), where
a fast task is queued to do the update, and from sysctl handlers which
change timecounter. A manual override switch
kern.timecounter.fast_gettime allows to turn off the mechanism.

Only x86 architectures export the real algorithm data, and there, only
for tsc timecounter. HPET counters page could be exported as well, but
I prefer to not further glue the kernel and libc ABI there until
proper vdso-based solution is developed.

Minimal stubs neccessary for non-x86 architectures to still compile
are provided.

Discussed with:	bde
Reviewed by:	jhb
Tested by:	flo
MFC after:	1 month
2012-06-22 07:06:40 +00:00
Peter Wemm
88c7c4348b Allow (with a license warning) "options ZFS" to work in static kernels.
The 'make depend' rules have to use custom -I paths for the special compat
includes for the opensolaris/zfs headers.

This option will pull in the couple of files that are shared with dtrace,
but they appear to correctly use the MODULE_VERSION/MODULE_DEPEND rules
so loader should do the right thing, as should kldload.

Reviewed by:	pjd (glanced at)
2012-03-27 21:23:56 +00:00
Marcel Moolenaar
e920e3978e Switch to the event timers infrastructure. This includes:
o   Setting td_intr_frame to the XIVs trap frame because it's referenced
    by the ET event handler.
o   Signal EOI to the CPU before calling the registered XIV handlers.
    This prevents lost ITC interrupts, which cause starvation in one-shot
    mode.
o   Adding support for IPI_HARDCLOCK with corresponding per-CPU counters.
o   Have the APs call cpu_initclocks() so as to limited the scattering of
    clock related initialization. cpu_initclocks() calls the <self>_bsp()
    or <self>_ap() version accordingly.
o   Uncomment the ET clock handling in cpu_idle().
o   Update the DDB 'show pcpu' output for the new MD fields.
o   Entirely rewritten ia64_ih_clock(). Note that we don't create as many
    clock XIVs as we have CPUs, as is done on PowerPC. It doesn't scale.
    We can only have 240 XIVs and we can have more CPUs than that. There's
    a single intrcnt index for the cumulative clock ticks and we keep per
    CPU counts in the PCPU stats structure.
o   Register the ITC by hooking SI_SUB_CONFIGURE (2nd order).

Open issues:
o   Clock interrupts can still be lost. Some tweaking is still necessary.

Thanks to: mav@ for his support, feedback and explanations.

ET stats while committing:
eris% sysctl machdep.cpu | grep nclks

machdep.cpu.0.nclks: 24007
machdep.cpu.1.nclks: 22895
machdep.cpu.2.nclks: 13523
machdep.cpu.3.nclks: 9342
machdep.cpu.4.nclks: 9103
machdep.cpu.5.nclks: 9298
machdep.cpu.6.nclks: 10039
machdep.cpu.7.nclks: 9479
eris% vmstat -i | grep clock
clock                      108599         50
2011-06-25 02:15:14 +00:00
Marcel Moolenaar
7df304f3e0 Stop linking against a direct-mapped virtual address and instead
use the PBVM. This eliminates the implied hardcoding of the
physical address at which the kernel needs to be loaded. Using the
PBVM makes it possible to load the kernel irrespective of the
physical memory organization and allows us to replicate kernel text
on NUMA machines.

While here, reduce the direct-mapped page size to the kernel's
page size so that we can support memory attributes better.
2011-04-30 20:49:00 +00:00
Bjoern A. Zeeb
70df4233cd Compile in in_cksum* implementations for both IPv6 and IPv6.
While in_pseudo() etc. is often used in offloading feature support,
in_cksum() is mostly used to fix some broken hardware.

Keeping both around for the moment allows us to compile NIC drivers
even in an IPv6 only environment without the need to mangle them
with #ifdef INETs in a way they are not prepared for.  This will
leave some dead code paths that will not be exercised for IPv6.

Reviewed by:	gnn
Sponsored by:	The FreeBSD Foundation
Sponsored by:	iXsystems
MFC after:	3 days
2011-04-20 12:58:30 +00:00
Marcel Moolenaar
0355a8b24b Fix switching to physical mode as part of calling into EFI runtime
services or PAL procedures. The new implementation is based on
specific functions that are known to be called in certain scenarios
only. This in particular fixes the PAL call to obtain information
about translation registers. In general, the new implementation does
not bank on virtual addresses being direct-mapped and will work when
the kernel uses PBVM.

When new scenarios need to be supported, new functions are added if
the existing functions cannot be changed to handle the new scenario.
If a single generic implementation is possible, it will become clear
in due time.

While here, change bootinfo to a pointer type in anticipation of
future development.
2011-03-21 18:20:53 +00:00
Nathan Whitehorn
841c0c7ec7 Provide groundwork for 32-bit binary compatibility on non-x86 platforms,
for upcoming 64-bit PowerPC and MIPS support. This renames the COMPAT_IA32
option to COMPAT_FREEBSD32, removes some IA32-specific code from MI parts
of the kernel and enhances the freebsd32 compatibility code to support
big-endian platforms.

Reviewed by:	kib, jhb
2010-03-11 14:49:06 +00:00
Rebecca Cran
ac6be749cd Remove the usb2_input_kbd directive that was missed during the renaming of the drivers in the usb2 stack.
Approved by:	rrs (mentor)
2010-02-08 19:48:33 +00:00
Marcel Moolenaar
409a390c33 Use io(4) for I/O port access on ia64, rather than through sysarch(2).
I/O port access is implemented on Itanium by reading and writing to a
special region in memory. To hide details and avoid misaligned memory
accesses, a process did I/O port reads and writes by making a MD system
call. There's one fatal problem with this approach: unprivileged access
was not being prevented. /dev/io serves that purpose on amd64/i386, so
employ it on ia64 as well. Use an ioctl for doing the actual I/O and
remove the sysarch(2) interface.

Backward compatibility is not being considered. The sysarch(2) approach
was added to support X11, but support for FreeBSD/ia64 was never fully
implemented in X11. Thus, nothing gets broken that didn't need more work
to begin with.

MFC after:	1 week
2010-01-11 18:10:13 +00:00
Marcel Moolenaar
938026e334 Revamp bus_space access functions:
o   Optimize for memory mapped I/O by making all I/O port acceses function
    calls and marking the test for the IA64_BUS_SPACE_IO tag with
    __predict_false(). Implement the I/O port access functions in a new
    file, called bus_machdep.c.
o   Change the bus_space_handle_t for memory mapped I/O to the virtual
    address rather than the physical address. This eliminates the PA->VA
    translation for every I/O access. The handle for I/O port access is
    still the port number.
o   Move inb(), outb(), inw(), outw(), inl(), outl(), and their string
    variants from cpufunc.h and define them in bus.h. On ia64 these are
    not CPU functions at all. In bus.h they are merely aliases for the
    new I/O port access functions defined in bus_machdep.h.
o   Handle the ACPI resource bug in nexus_set_resource(). There we can
    do it once so that we don't have to worry about it whenever we need
    to write to an I/O port that is really a memory mapped address.

The upshot of this change is that the KBI is better defined and that I/O
port access always involves a function call, allowing us to change the
actual implementation without breaking the KBI. For memory mapped I/O the
virtual address is abstracted, so that we can change the VA->PA mapping
in the kernel without causing an KBI breakage. The exception at this time
is for bus_space_map() and bus_space_unmap().

MFC after:	1 week.
2009-12-30 18:15:25 +00:00
Marcel Moolenaar
d85de18e39 SYnc with amd64:
De-support adv_isa.c and aic_isa.c
2009-12-26 22:06:55 +00:00
Marcel Moolenaar
8d077f48f0 Reimplement the lazy FP context switching:
o   Move all code into a single file for easier maintenance.
o   Use a single global lock to avoid having to handle either
    multiple locks or race conditions.
o   Make sure to disable the high FP registers after saving
    or dropping them.
o   use msleep() to wait for the other CPU to save the high
    FP registers.

This change fixes the high FP inconsistency panics.

A single global lock typically serializes too much, which may
be noticable when a lot of threads use the high FP registers,
but in that case it's probably better to switch the high FP
context synchronuously. Put differently: cpu_switch() should
switch the high FP registers if the incoming and outgoing
threads both use the high FP registers.
2009-10-31 22:27:31 +00:00
Ed Schouten
9b934d0930 Move libteken out of the syscons directory.
I initially committed libteken to sys/dev/syscons/teken, but now that
I'm working on a console driver myself, I noticed this was not a good
decision. Move it to sys/teken to make it easier for other drivers to
use a terminal emulator.

Also list teken.c in sys/conf/files, instead of listing it in all the
files.arch files separately.
2009-09-03 09:33:57 +00:00
Konstantin Belousov
e564825182 Add trivial implementation for the freebsd32_sysarch on ia64.
Fix comapt32 and LINT build on ia64.

Discussed with:	jhb
2009-04-01 19:23:07 +00:00
Ed Schouten
802cb57e34 Add memmove() to the kernel, making the kernel compile with Clang.
When copying big structures, LLVM generates calls to memmove(), because
it may not be able to figure out whether structures overlap. This caused
linker errors to occur. memmove() is now implemented using bcopy().
Ideally it would be the other way around, but that can be solved in the
future. On ARM we don't do add anything, because it already has
memmove().

Discussed on:	arch@
Reviewed by:	rdivacky
2009-02-28 16:21:25 +00:00
Andrew Thompson
719085d9d1 Pull in kbd.c with usb2_input_kbd, just like ukbd. 2009-02-15 20:24:21 +00:00
Ed Schouten
b4b1c5169d Replace syscons terminal renderer by a new renderer that uses libteken.
Some time ago I started working on a library called libteken, which is
terminal emulator. It does not buffer any screen contents, but only
keeps terminal state, such as cursor position, attributes, etc. It
should implement all escape sequences that are implemented by the
cons25 terminal emulator, but also a fair amount of sequences that are
present in VT100 and xterm.

A lot of random notes, which could be of interest to users/developers:

- Even though I'm leaving the terminal type set to `cons25', users can
  do experiments with placing `xterm-color' in /etc/ttys. Because we
  only implement a subset of features of xterm, this may cause
  artifacts. We should consider extending libteken, because in my
  opinion xterm is the way to go. Some missing features:

  - Keypad application mode (DECKPAM)
  - Character sets (SCS)

- libteken is filled with a fair amount of assertions, but unfortunately
  we cannot go into the debugger anymore if we fail them. I've done
  development of this library almost entirely in userspace. In
  sys/dev/syscons/teken there are two applications that can be helpful
  when debugging the code:

  - teken_demo: a terminal emulator that can be started from a regular
    xterm that emulates a terminal using libteken. This application can
    be very useful to debug any rendering issues.

  - teken_stress: a stress testing application that emulates random
    terminal output. libteken has literally survived multiple terabytes
    of random input.

- libteken also includes support for UTF-8, but unfortunately our input
  layer and font renderer don't support this. If users want to
  experiment with UTF-8 support, they can enable `TEKEN_UTF8' in
  teken.h. If you recompile your kernel or the teken_demo application,
  you can hold some nice experiments.

- I've left PC98 the way it is right now. The PC98 platform has a custom
  syscons renderer, which supports some form of localised input. Maybe
  we should port PC98 to libteken by the time syscons supports UTF-8?

- I've removed the `dumb' terminal emulator. It has been broken for
  years. It hasn't survived the `struct proc' -> `struct thread'
  conversion.

- To prevent confusion among people that want to hack on libteken:
  unlike syscons, the state machines that parse the escape sequences are
  machine generated. This means that if you want to add new escape
  sequences, you have to add an entry to the `sequences' file. This will
  cause new entries to be added to `teken_state.h'.

- Any rendering artifacts that didn't occur prior to this commit are by
  accident. They should be reported to me, so I can fix them.

Discussed on:	current@, hackers@
Discussed with:	philip (at 25C3)
2009-01-01 13:26:53 +00:00
David E. O'Brien
ae528485c4 Add freebsd32 compat shims for ioctl(2)
MDIOCATTACH, MDIOCDETACH, MDIOCQUERY, and MDIOCLIST requests.
2008-09-22 16:09:16 +00:00
Robert Watson
3c90d1ea74 Break out stack(9) from ddb(4):
- Introduce per-architecture stack_machdep.c to hold stack_save(9).
- Introduce per-architecture machine/stack.h to capture any common
  definitions required between db_trace.c and stack_machdep.c.
- Add new kernel option "options STACK"; we will build in stack(9) if it is
  defined, or also if "options DDB" is defined to provide compatibility
  with existing users of stack(9).

Add new stack_save_td(9) function, which allows the capture of a stacktrace
of another thread rather than the current thread, which the existing
stack_save(9) was limited to.  It requires that the thread be neither
swapped out nor running, which is the responsibility of the consumer to
enforce.

Update stack(9) man page.

Build tested:	amd64, arm, i386, ia64, powerpc, sparc64, sun4v
Runtime tested:	amd64 (rwatson), arm (cognet), i386 (rwatson)
2007-12-02 20:40:35 +00:00
David E. O'Brien
a9d185b2c9 Align. 2007-10-25 14:16:07 +00:00
George V. Neville-Neil
b2630c2934 Commit the change from FAST_IPSEC to IPSEC. The FAST_IPSEC
option is now deprecated, as well as the KAME IPsec code.
What was FAST_IPSEC is now IPSEC.

Approved by: re
Sponsored by: Secure Computing
2007-07-03 12:13:45 +00:00
Alexander Kabaev
74c7f74304 LINT on ia64 requires memset symbol too. Make fire it is present by adding
it to libkern on this architecture.
2007-04-09 14:02:18 +00:00
Ruslan Ermilov
837f167eb2 Move "device splash" back to MI NOTES and "files", it's MI. 2006-10-23 13:23:14 +00:00
Ruslan Ermilov
663cf7fed2 Move MI parts of syscons into MI "files". 2006-10-23 13:05:01 +00:00
Marcel Moolenaar
4b8d8ccc23 Move default GEOM classes from files.ia64, where they were marked
standard, to the DEFAULTS file.
2006-07-17 20:02:51 +00:00
Marcel Moolenaar
559adb10ad Partial support for branch long emulation. This only emulates the
branch long jump and not the branch long call. Support for that is
forthcoming.
2006-06-29 19:59:18 +00:00
Marcel Moolenaar
cea4d8752f o Move ISA specific code from ppc.c to ppc_isa.c -- a bus front-
end for isa(4).
o  Add a seperate bus frontend for acpi(4) and allow ISA DMA for
   it when ISA is configured in the kernel. This allows acpi(4)
   attachments in non-ISA configurations, as is possible for ia64.
o  Add a seperate bus frontend for pci(4) and detect known single
   port parallel cards.
o  Merge PC98 specific changes under pc98/cbus into the MI driver.
   The changes are minor enough for conditional compilation and
   in this form invites better abstraction.
o  Have ppc(4) usabled on all platforms, now that ISA specifics
   are untangled enough.
2006-04-24 23:31:51 +00:00
Yaroslav Tykhiy
8d96e45531 Retire NETSMBCRYPTO as a kernel option and make its functionality
enabled by default in NETSMB and smbfs.ko.

With the most of modern SMB providers requiring encryption by
default, there is little sense left in keeping the crypto part
of NETSMB optional at the build time.

This will also return smbfs.ko to its former properties users
are rather accustomed to.

Discussed with:		freebsd-stable, re (scottl)
Not objected by:	bp, tjr (silence)
MFC after:		5 days
2006-03-05 22:52:17 +00:00
Ruslan Ermilov
a8e06f2a52 Make config(8) understand ORed dependecies in "files*" and
improve tracking of known devices.  Bump config(8) version.
2005-11-27 21:41:58 +00:00
Marcel Moolenaar
8115693121 Merge db_interface.c and db_trace.c into db_machdep.c. 2005-09-10 03:18:51 +00:00
Marcel Moolenaar
464d16ddf0 Move the ia32_sigcode structure from ia32_sigtramp.c to ia32_signal.c.
It's a bit excessive to have it in a file of its own.
2005-09-10 02:12:49 +00:00
Peter Wemm
62919d788b Jumbo-commit to enhance 32 bit application support on 64 bit kernels.
This is good enough to be able to run a RELENG_4 gdb binary against
a RELENG_4 application, along with various other tools (eg: 4.x gcore).
We use this at work.

ia32_reg.[ch]: handle the 32 bit register file format, used by ptrace,
	procfs and core dumps.
procfs_*regs.c: vary the format of proc/XXX/*regs depending on the client
	and target application.
procfs_map.c: Don't print a 64 bit value to 32 bit consumers, or their
	sscanf fails.  They expect an unsigned long.
imgact_elf.c: produce a valid 32 bit coredump for 32 bit apps.
sys_process.c: handle 32 bit consumers debugging 32 bit targets.  Note
	that 64 bit consumers can still debug 32 bit targets.

IA64 has got stubs for ia32_reg.c.

Known limitations: a 5.x/6.x gdb uses get/setcontext(), which isn't
implemented in the 32/64 wrapper yet.  We also make a tiny patch to
gdb pacify it over conflicting formats of ld-elf.so.1.

Approved by:	re
2005-06-30 07:49:22 +00:00
Marcel Moolenaar
b29a2e6841 Include the puc(4) bus frontend for ppc(4) when both ppc and puc are
configured.

PR: kern/80737
Submitted by: David Taylor &lt davidt-fbsd at yadt dot co dot uk &gt
Approved by: re (scottl)
MFC after: 5 days
2005-06-14 04:16:10 +00:00
Marcel Moolenaar
b16d349f1b Refactor the NETSMBCRYPTO option so that it does the same on all
platforms. ARM is excluded as it doesn't yet have any crypto
sources.

Approved by: re (dwhite)
MFC after: 1 day
2005-06-12 00:47:21 +00:00
Marius Strobl
520b635320 - Hook up the new locations of the atkbdc(4), atkbd(4) and psm(4) source
files after they were repo-copied to sys/dev/atkbdc. The sources of
  atkbdc(4) and its children were moved to the new location in preparation
  for adding an EBus front-end to atkbdc(4) for use on sparc64; i.e. in
  order to not further scatter them over the whole tree which would have
  been the result of adding atkbdc_ebus.c in e.g. sys/sparc64/ebus. Another
  reason for the repo-copies was that some of the sources were misfiled,
  e.g. sys/isa/atkbd_isa.c wasn't ISA-specific at all but for hanging
  atkbd(4) off of atkbdc(4) and was renamed to atkbd_atkbdc.c accordingly.
  Most of sys/isa/psm.c, i.e. expect for its PSMC PNP part, also isn't
  ISA-specific.
- Separate the parts of atkbdc_isa.c which aren't actually ISA-specific
  but are shareable between different atkbdc(4) bus front-ends into
  atkbdc_subr.c (repo-copied from atkbdc_isa.c). While here use
  bus_generic_rl_alloc_resource() and bus_generic_rl_release_resource()
  respectively in atkbdc_isa.c instead of rolling own versions.
- Add sparc64 MD bits to atkbdc(4) and atkbd(4) and an EBus front-end for
  atkbdc(4). PS/2 controllers and input devices are used on a couple of
  Sun OEM boards and occur on either the EBus or the ISA bus. Depending on
  the board it's either the only on-board mean to connect a keyboard and
  mouse or an alternative to either RS232 or USB devices.
- Wrap the PSMC PNP part of psm.c in #ifdef DEV_ISA so it can be compiled
  without isa(4) (e.g. for EBus-only machines). This ISA-specific part
  isn't separated into its own source file, yet, as it requires more work
  than was feasible for 6.0 in order to do it in a clean way. Actually
  philip@ is working on a rewrite of psm(4) so a more comprehensive
  clean-up and separation of hardware dependent and independent parts is
  expected to happen after 6.0.

Tested on:	i386, sparc64 (AX1105, AXe and AXi boards)
Reviewed by:	philip
2005-06-10 20:56:38 +00:00
Joseph Koshy
f263522a45 MFP4:
- Implement sampling modes and logging support in hwpmc(4).

- Separate MI and MD parts of hwpmc(4) and allow sharing of
  PMC implementations across different architectures.
  Add support for P4 (EMT64) style PMCs to the amd64 code.

- New pmcstat(8) options: -E (exit time counts) -W (counts
  every context switch), -R (print log file).

- pmc(3) API changes, improve our ability to keep ABI compatibility
  in the future.  Add more 'alias' names for commonly used events.

- bug fixes & documentation.
2005-06-09 19:45:09 +00:00
Marcel Moolenaar
8773a80baf Sanity the RTC code:
o  Remove the clock interface. Not only does it conflict with the MI
   version when device genclock is added to the kernel, it was also
   not possible to have more than 1 clock device. This of course would
   have been a problem if we actually had more than 1 clock device.
   In short: we don't need a clock interface and if we do eventually,
   we should be using the MI one.
o  Rewrite inittodr() and resettodr() to take into account that:
   1)  We use the EFI interface directly.
   2)  time_t is 64-bit and we do need to make sure we can determine
       leap years from year 2100 and on. Add a nice explanation of
       where leap years come from and why.
   3)  This rewrite happened in 2005 so any date prior to 1/1/2005
       (either M/D/Y or D/M/Y) is bogus. Reprogram the EFI clock with
       1/1/2005 in that case.
   4)  The EFI clock has a high probability of being correct, so
       only (further) correct the EFI clock when the file system time
       is larger. That should never happen in a time-synchronised world.
       Complain when EFI lost 2 days or more.

Replace the copyright notice now that I (pretty much) rewrote all of
this file.
2005-04-22 05:04:58 +00:00
John Baldwin
c6a37e8413 Divorce critical sections from spinlocks. Critical sections as denoted by
critical_enter() and critical_exit() are now solely a mechanism for
deferring kernel preemptions.  They no longer have any affect on
interrupts.  This means that standalone critical sections are now very
cheap as they are simply unlocked integer increments and decrements for the
common case.

Spin mutexes now use a separate KPI implemented in MD code: spinlock_enter()
and spinlock_exit().  This KPI is responsible for providing whatever MD
guarantees are needed to ensure that a thread holding a spin lock won't
be preempted by any other code that will try to lock the same lock.  For
now all archs continue to block interrupts in a "spinlock section" as they
did formerly in all critical sections.  Note that I've also taken this
opportunity to push a few things into MD code rather than MI.  For example,
critical_fork_exit() no longer exists.  Instead, MD code ensures that new
threads have the correct state when they are created.  Also, we no longer
try to fixup the idlethreads for APs in MI code.  Instead, each arch sets
the initial curthread and adjusts the state of the idle thread it borrows
in order to perform the initial context switch.

This change is largely a big NOP, but the cleaner separation it provides
will allow for more efficient alternative locking schemes in other parts
of the kernel (bare critical sections rather than per-CPU spin mutexes
for per-CPU data for example).

Reviewed by:	grehan, cognet, arch@, others
Tested on:	i386, alpha, sparc64, powerpc, arm, possibly more
2005-04-04 21:53:56 +00:00
Warner Losh
685e700261 It appears that 'kbd' device has never been used and isn't needed.
Build tests show that this isn't used for GENERIC or LINT, and nobody
seemed to know why they existed.
2004-11-23 00:00:43 +00:00
Marcel Moolenaar
03bfdd1362 Move the IA-32 trap handling from trap() to ia32_trap(). Move the
ia32_syscall() function along with it to ia32_trap.c. When COMPAT_IA32
is not defined, we'll raise SIGEMT instead.
2004-09-25 04:27:44 +00:00
Marcel Moolenaar
97752b2cbd Catch up with the drive-by renaming of IA32 to COMPAT_IA32. It must
have been rush hour...

While here, move COMPAT_IA32 from opt_global.h to opt_compat.h like on
amd64. Consequently, it's unsafe to use the option in pcb.h. We now
unconditionally have the ia32 specific registers in the PCB.

This commit is untested.
2004-08-16 18:54:23 +00:00
Mark Murray
8ab2f5ecc5 Break out the MI part of the /dev/[k]mem and /dev/io drivers into
their own directory and module, leaving the MD parts in the MD
area (the MD parts _are_ part of the modules). /dev/mem and /dev/io
are now loadable modules, thus taking us one step further towards
a kernel created entirely out of modules. Of course, there is nothing
preventing the kernel from having these statically compiled.
2004-08-01 11:40:54 +00:00
Marcel Moolenaar
5971a234e5 Hook the GDB backend into the build. 2004-07-10 23:31:17 +00:00
Nate Lawson
f1ca765c85 Move acpi_if.m to files.{amd64,i386,ia64}. This should fix the alpha build.
Pointed out by:	gallatin
2004-06-30 14:19:28 +00:00
Marcel Moolenaar
985b853f84 o De-support fdc(4). No ia64 has ever been made with PC floppy and
the likelyhood of one ever being made is nil.
o  While here, de-support sio(4).
2004-05-17 06:51:19 +00:00
Warner Losh
6cd91141eb Move fdc from isa/fd.c to dev/fdc/fdc.c. The old files were
repocopied.  Soon there will be additional bus attachments and
specialization for isa, acpi and pccard (and maybe pc98's cbus).

This was approved by nate, joerg and myself.  bde dissented on the new
location, but appeared to be OK after some discussion.
2004-05-17 05:46:16 +00:00