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freebsd-dev/sys/amd64/include/pcb.h

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Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*-
Update the graffiti.
2003-11-08 04:39:22 +00:00
* Copyright (c) 2003 Peter Wemm.
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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.
* 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: Remove patch kit headers, and add $Id$ This is mostly to align some more code with NetBSD. cpu.h: Remove the old function vs. include configuration stuff that was ifdefed out when we went to inline functions. Remove the define of resettodr that made it a nop, there is already a function that makes it a nop, no need to #define one. Remove the #defines of processor types, they are now defined in cputypes.h, #include that file. Add struct cpu_nameclass for support of cpu types. frame.h: include sys/signal.h, it will be needed in the future. put the sigframe structure here that was in machdep.c pcb.h: Add multiple inclusion protection. Add pcb_ldt and pcb_ldt_len to pcb structure, this is for the user mode ldt.
1993-10-08 20:51:00 +00:00
* from: @(#)pcb.h 5.10 (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
*/
Update the graffiti.
2003-11-08 04:39:22 +00:00
#ifndef _AMD64_PCB_H_
#define _AMD64_PCB_H_
All: Remove patch kit headers, and add $Id$ This is mostly to align some more code with NetBSD. cpu.h: Remove the old function vs. include configuration stuff that was ifdefed out when we went to inline functions. Remove the define of resettodr that made it a nop, there is already a function that makes it a nop, no need to #define one. Remove the #defines of processor types, they are now defined in cputypes.h, #include that file. Add struct cpu_nameclass for support of cpu types. frame.h: include sys/signal.h, it will be needed in the future. put the sigframe structure here that was in machdep.c pcb.h: Add multiple inclusion protection. Add pcb_ldt and pcb_ldt_len to pcb structure, this is for the user mode ldt.
1993-10-08 20:51:00 +00:00
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
Rename npx* to fpu*. I haven't done the flags/function names yet.
2003-11-08 02:39:46 +00:00
* AMD64 process control block
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
*/
Rename npx* to fpu*. I haven't done the flags/function names yet.
2003-11-08 02:39:46 +00:00
#include <machine/fpu.h>
MFP4: Linux set_thread_area syscall (aka TLS) support for amd64. Initial version was submitted by Divacky Roman and mostly rewritten by me. Tested by: emulation
2007-03-30 00:06:21 +00:00
#include <machine/segments.h>
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
struct pcb {
Commit MD parts of a loosely functional AMD64 port. This is based on a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
register_t pcb_r15;
register_t pcb_r14;
register_t pcb_r13;
register_t pcb_r12;
register_t pcb_rbp;
register_t pcb_rsp;
register_t pcb_rbx;
register_t pcb_rip;
Give a %fs and %gs to userland. Use swapgs to obtain the kernel %GS.base value on entry and exit. This isn't as easy as it sounds because when we recursively trap or interrupt, we have to avoid duplicating the swapgs instruction or we end up back with the userland %gs. I implemented this by testing TF_CS to see if we're coming from supervisor mode already, and check for returning to supervisor. To avoid a race with interrupts in the brief period after beginning executing the handler and before the swapgs, convert all trap gates to interrupt gates, and reenable interrupts immediately after the swapgs. I am not happy with this. There are other possible ways to do this that should be investigated. (eg: storing the GS.base MSR value in the trapframe) Add some sysarch functions to let the userland code get to this. Approved by: re (blanket amd64/*)
2003-05-12 02:37:29 +00:00
register_t pcb_fsbase;
register_t pcb_gsbase;
- Merge savectx2() with savectx() and struct xpcb with struct pcb. [1] savectx() is only used for panic dump (dumppcb) and kdb (stoppcbs). Thus, saving additional information does not hurt and it may be even beneficial. Unfortunately, struct pcb has grown larger to accommodate more data. Move 512-byte long pcb_user_save to the end of struct pcb while I am here. - savectx() now saves FPU state unconditionally and copy it to the PCB of FPU thread if necessary. This gives panic dump and kdb a chance to take a look at the current FPU state even if the FPU is "supposedly" not used. - Resuming CPU now unconditionally reinitializes FPU. If the saved FPU state was irrelevant, it could be in an unknown state. Suggested by: bde [1]
2010-08-02 17:35:00 +00:00
register_t pcb_kgsbase;
Move pcb_flags to make trivially better use of cache lines.
2008-03-23 22:45:51 +00:00
u_long pcb_flags;
Move the PCB flag macros up next to the 'pcb_flags' member in the struct.
2009-03-05 16:52:50 +00:00
#define PCB_DBREGS 0x02 /* process using debug registers */
Introduce the x86 kernel interfaces to allow kernel code to use FPU/SSE hardware. Caller should provide a save area that is chained into the stack of the areas; pcb save_area for usermode FPU state is on top. The pcb now contains a pointer to the current FPU saved area, used during FPUDNA handling and context switches. There is also a facility to allow the kernel thread to use pcb save_area. Change the dreaded warnings "npxdna in kernel mode!" into the panics when FPU usage is not registered. KPI discussed with: fabient Tested by: pho, fabient Hardware provided by: Sentex Communications MFC after: 1 month
2010-06-05 15:59:59 +00:00
#define PCB_KERNFPU 0x04 /* kernel uses fpu */
Move the PCB flag macros up next to the 'pcb_flags' member in the struct.
2009-03-05 16:52:50 +00:00
#define PCB_FPUINITDONE 0x08 /* fpu state is initialized */
Introduce the x86 kernel interfaces to allow kernel code to use FPU/SSE hardware. Caller should provide a save area that is chained into the stack of the areas; pcb save_area for usermode FPU state is on top. The pcb now contains a pointer to the current FPU saved area, used during FPUDNA handling and context switches. There is also a facility to allow the kernel thread to use pcb save_area. Change the dreaded warnings "npxdna in kernel mode!" into the panics when FPU usage is not registered. KPI discussed with: fabient Tested by: pho, fabient Hardware provided by: Sentex Communications MFC after: 1 month
2010-06-05 15:59:59 +00:00
#define PCB_USERFPUINITDONE 0x10 /* fpu user state is initialized */
Move the PCB flag macros up next to the 'pcb_flags' member in the struct.
2009-03-05 16:52:50 +00:00
#define PCB_GS32BIT 0x20 /* linux gs switch */
#define PCB_32BIT 0x40 /* process has 32 bit context (segs etc) */
#define PCB_FULLCTX 0x80 /* full context restore on sysret */
- Merge savectx2() with savectx() and struct xpcb with struct pcb. [1] savectx() is only used for panic dump (dumppcb) and kdb (stoppcbs). Thus, saving additional information does not hurt and it may be even beneficial. Unfortunately, struct pcb has grown larger to accommodate more data. Move 512-byte long pcb_user_save to the end of struct pcb while I am here. - savectx() now saves FPU state unconditionally and copy it to the PCB of FPU thread if necessary. This gives panic dump and kdb a chance to take a look at the current FPU state even if the FPU is "supposedly" not used. - Resuming CPU now unconditionally reinitializes FPU. If the saved FPU state was irrelevant, it could be in an unknown state. Suggested by: bde [1]
2010-08-02 17:35:00 +00:00
register_t pcb_cr0;
register_t pcb_cr2;
register_t pcb_cr3;
register_t pcb_cr4;
register_t pcb_dr0;
register_t pcb_dr1;
register_t pcb_dr2;
register_t pcb_dr3;
register_t pcb_dr6;
register_t pcb_dr7;
Implement support for hardware debug registers on the i386. Submitted by: Brian Dean <brdean@unx.sas.com>
1999-07-09 04:16:00 +00:00
A better fix for handling different FPU initial control words for different ABIs: - Store the FPU initial control word in the pcb for each thread. - When first using the FPU, load the initial control word after restoring the clean state if it is not the standard control word. - Provide a correct control word for Linux/i386 binaries under FreeBSD/amd64. - Adjust the control word returned for fpugetregs()/npxgetregs() when a thread hasn't used the FPU yet to reflect the real initial control word for the current ABI. - The Linux/i386 ABI for FreeBSD/i386 now properly sets the right control word instead of trashing whatever the current state of the FPU is. Reviewed by: bde
2009-03-05 19:42:11 +00:00
uint16_t pcb_initial_fpucw;
1.Fix smp race between kernel vm86 BIOS calling and userland vm86 mode code, remove global variable in_vm86call, set vm86 calling flag in PCB flags. 2.Fix vm86 BIOS calling preempted problem by changing vm86_lock mutex type from MTX_DEF to MTX_SPIN. vm86pcb is not remembered in thread struct, when the thread calling vm86 BIOS is preempted by interrupt thread, and later switching back to the thread would cause incorrect context be loaded into CPU registers, this leads to kernel crash.
2002-11-07 01:34:23 +00:00
Restore the segment registers and segment base MSRs for amd64 syscall return path only when neither thread was context switched while executing syscall code nor syscall explicitely modified LDT or MSRs. Save segment registers in trap handlers before interrupts are enabled, to not allow context switches to happen before registers are saved. Use separated byte in pcb for indication of fast/full return, since pcb_flags are not synchronized with context switches. The change puts back syscall microbenchmark numbers that were slowed down after commit of the support for LDT on amd64. Reviewed by: jeff Tested (and tested, and tested ...) by: pho Approved by: re (kensmith)
2009-07-09 09:34:11 +00:00
caddr_t pcb_onfault; /* copyin/out fault recovery */
MFP4: Linux set_thread_area syscall (aka TLS) support for amd64. Initial version was submitted by Divacky Roman and mostly rewritten by me. Tested by: emulation
2007-03-30 00:06:21 +00:00
/* 32-bit segment descriptor */
- Merge savectx2() with savectx() and struct xpcb with struct pcb. [1] savectx() is only used for panic dump (dumppcb) and kdb (stoppcbs). Thus, saving additional information does not hurt and it may be even beneficial. Unfortunately, struct pcb has grown larger to accommodate more data. Move 512-byte long pcb_user_save to the end of struct pcb while I am here. - savectx() now saves FPU state unconditionally and copy it to the PCB of FPU thread if necessary. This gives panic dump and kdb a chance to take a look at the current FPU state even if the FPU is "supposedly" not used. - Resuming CPU now unconditionally reinitializes FPU. If the saved FPU state was irrelevant, it could be in an unknown state. Suggested by: bde [1]
2010-08-02 17:35:00 +00:00
struct user_segment_descriptor pcb_gs32sd;
Save and restore segment registers on amd64 when entering and leaving the kernel on amd64. Fill and read segment registers for mcontext and signals. Handle traps caused by restoration of the invalidated selectors. Implement user-mode creation and manipulation of the process-specific LDT descriptors for amd64, see sysarch(2). Implement support for TSS i/o port access permission bitmap for amd64. Context-switch LDT and TSS. Do not save and restore segment registers on the context switch, that is handled by kernel enter/leave trampolines now. Remove segment restore code from the signal trampolines for freebsd/amd64, freebsd/ia32 and linux/i386 for the same reason. Implement amd64-specific compat shims for sysarch. Linuxolator (temporary ?) switched to use gsbase for thread_area pointer. TODO: Currently, gdb is not adapted to show segment registers from struct reg. Also, no machine-depended ptrace command is added to set segment registers for debugged process. In collaboration with: pho Discussed with: peter Reviewed by: jhb Linuxolator tested by: dchagin
2009-04-01 13:09:26 +00:00
/* local tss, with i/o bitmap; NULL for common */
struct amd64tss *pcb_tssp;
Introduce the x86 kernel interfaces to allow kernel code to use FPU/SSE hardware. Caller should provide a save area that is chained into the stack of the areas; pcb save_area for usermode FPU state is on top. The pcb now contains a pointer to the current FPU saved area, used during FPUDNA handling and context switches. There is also a facility to allow the kernel thread to use pcb save_area. Change the dreaded warnings "npxdna in kernel mode!" into the panics when FPU usage is not registered. KPI discussed with: fabient Tested by: pho, fabient Hardware provided by: Sentex Communications MFC after: 1 month
2010-06-05 15:59:59 +00:00
struct savefpu *pcb_save;
Restore the segment registers and segment base MSRs for amd64 syscall return path only when neither thread was context switched while executing syscall code nor syscall explicitely modified LDT or MSRs. Save segment registers in trap handlers before interrupts are enabled, to not allow context switches to happen before registers are saved. Use separated byte in pcb for indication of fast/full return, since pcb_flags are not synchronized with context switches. The change puts back syscall microbenchmark numbers that were slowed down after commit of the support for LDT on amd64. Reviewed by: jeff Tested (and tested, and tested ...) by: pho Approved by: re (kensmith)
2009-07-09 09:34:11 +00:00
char pcb_full_iret;
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
- Merge savectx2() with savectx() and struct xpcb with struct pcb. [1] savectx() is only used for panic dump (dumppcb) and kdb (stoppcbs). Thus, saving additional information does not hurt and it may be even beneficial. Unfortunately, struct pcb has grown larger to accommodate more data. Move 512-byte long pcb_user_save to the end of struct pcb while I am here. - savectx() now saves FPU state unconditionally and copy it to the PCB of FPU thread if necessary. This gives panic dump and kdb a chance to take a look at the current FPU state even if the FPU is "supposedly" not used. - Resuming CPU now unconditionally reinitializes FPU. If the saved FPU state was irrelevant, it could be in an unknown state. Suggested by: bde [1]
2010-08-02 17:35:00 +00:00
struct region_descriptor pcb_gdt;
struct region_descriptor pcb_idt;
struct region_descriptor pcb_ldt;
uint16_t pcb_tr;
struct savefpu pcb_user_save;
Initial suspend/resume support for amd64. This code is heavily inspired by Takanori Watanabe's experimental SMP patch for i386 and large portion was shamelessly cut and pasted from Peter Wemm's AP boot code.
2009-03-17 00:48:11 +00:00
};
Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
1999-12-29 04:46:21 +00:00
#ifdef _KERNEL
Implement makectx(). The makectx() function is used by KDB to create a PCB from a trapframe for purposes of unwinding the stack. The PCB is used as the thread context and all but the thread that entered the debugger has a valid PCB. This function can also be used to create a context for the threads running on the CPUs that have been stopped when the debugger got entered. This however is not done at the time of this commit.
2004-07-10 19:56:00 +00:00
struct trapframe;
void makectx(struct trapframe *, struct pcb *);
- Merge savectx2() with savectx() and struct xpcb with struct pcb. [1] savectx() is only used for panic dump (dumppcb) and kdb (stoppcbs). Thus, saving additional information does not hurt and it may be even beneficial. Unfortunately, struct pcb has grown larger to accommodate more data. Move 512-byte long pcb_user_save to the end of struct pcb while I am here. - savectx() now saves FPU state unconditionally and copy it to the PCB of FPU thread if necessary. This gives panic dump and kdb a chance to take a look at the current FPU state even if the FPU is "supposedly" not used. - Resuming CPU now unconditionally reinitializes FPU. If the saved FPU state was irrelevant, it could be in an unknown state. Suggested by: bde [1]
2010-08-02 17:35:00 +00:00
int savectx(struct pcb *);
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
#endif
All: Remove patch kit headers, and add $Id$ This is mostly to align some more code with NetBSD. cpu.h: Remove the old function vs. include configuration stuff that was ifdefed out when we went to inline functions. Remove the define of resettodr that made it a nop, there is already a function that makes it a nop, no need to #define one. Remove the #defines of processor types, they are now defined in cputypes.h, #include that file. Add struct cpu_nameclass for support of cpu types. frame.h: include sys/signal.h, it will be needed in the future. put the sigframe structure here that was in machdep.c pcb.h: Add multiple inclusion protection. Add pcb_ldt and pcb_ldt_len to pcb structure, this is for the user mode ldt.
1993-10-08 20:51:00 +00:00
Update the graffiti.
2003-11-08 04:39:22 +00:00
#endif /* _AMD64_PCB_H_ */
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