version 1.71, 2008/05/02 15:26:38 |
version 1.86, 2009/03/21 22:55:08 |
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/*- |
/*- |
* Copyright (c) 1998, 2000, 2004, 2006, 2007 The NetBSD Foundation, Inc. |
* Copyright (c) 1998, 2000, 2004, 2006, 2007, 2009 The NetBSD Foundation, Inc. |
* All rights reserved. |
* All rights reserved. |
* |
* |
* This code is derived from software contributed to The NetBSD Foundation |
* This code is derived from software contributed to The NetBSD Foundation |
* by Charles M. Hannum. |
* by Charles M. Hannum, and by Andrew Doran. |
* |
* |
* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* modification, are permitted provided that the following conditions |
Line 138 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 138 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_compat_oldboot.h" |
#include "opt_compat_oldboot.h" |
#include "opt_ddb.h" |
#include "opt_ddb.h" |
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#include "opt_modular.h" |
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#include "opt_multiboot.h" |
#include "opt_realmem.h" |
#include "opt_realmem.h" |
#include "opt_vm86.h" |
#include "opt_vm86.h" |
#include "opt_xen.h" |
#include "opt_xen.h" |
Line 192 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 194 __KERNEL_RCSID(0, "$NetBSD$"); |
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.ascii "GUEST_OS=netbsd,GUEST_VER=2.0,XEN_VER=2.0" |
.ascii "GUEST_OS=netbsd,GUEST_VER=2.0,XEN_VER=2.0" |
#endif /* XEN3 */ |
#endif /* XEN3 */ |
.ascii ",LOADER=generic" |
.ascii ",LOADER=generic" |
#if (NKSYMS || defined(DDB) || defined(LKM)) && !defined(SYMTAB_SPACE) |
#if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(SYMTAB_SPACE) |
.ascii ",BSD_SYMTAB=yes" |
.ascii ",BSD_SYMTAB=yes" |
#endif |
#endif |
.byte 0 |
.byte 0 |
Line 204 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 206 __KERNEL_RCSID(0, "$NetBSD$"); |
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.data |
.data |
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.globl _C_LABEL(cpu) |
.globl _C_LABEL(cpu) |
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.globl _C_LABEL(cpuid_level) |
.globl _C_LABEL(esym) |
.globl _C_LABEL(esym) |
.globl _C_LABEL(eblob) |
.globl _C_LABEL(eblob) |
.globl _C_LABEL(atdevbase) |
.globl _C_LABEL(atdevbase) |
Line 236 _C_LABEL(lapic_tpr): |
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Line 239 _C_LABEL(lapic_tpr): |
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#endif |
#endif |
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_C_LABEL(cpu): .long 0 # are we 80486, Pentium, or.. |
_C_LABEL(cpu): .long 0 # are we 80486, Pentium, or.. |
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_C_LABEL(cpuid_level): .long 0 |
_C_LABEL(atdevbase): .long 0 # location of start of iomem in virtual |
_C_LABEL(atdevbase): .long 0 # location of start of iomem in virtual |
_C_LABEL(proc0uarea): .long 0 |
_C_LABEL(proc0uarea): .long 0 |
_C_LABEL(PDPpaddr): .long 0 # paddr of PDP, for libkvm |
_C_LABEL(PDPpaddr): .long 0 # paddr of PDP, for libkvm |
Line 309 _C_LABEL(Multiboot_Header): |
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Line 313 _C_LABEL(Multiboot_Header): |
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movw %ax,%fs |
movw %ax,%fs |
movw %ax,%gs |
movw %ax,%gs |
decl %eax |
decl %eax |
movl %eax,RELOC(cpu_info_primary)+CPU_INFO_LEVEL |
movl %eax,RELOC(cpuid_level) |
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/* Find out our CPU type. */ |
/* Find out our CPU type. */ |
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try586: /* Use the `cpuid' instruction. */ |
try586: /* Use the `cpuid' instruction. */ |
xorl %eax,%eax |
xorl %eax,%eax |
cpuid |
cpuid |
movl %eax,RELOC(cpu_info_primary)+CPU_INFO_LEVEL |
movl %eax,RELOC(cpuid_level) |
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2: |
2: |
/* |
/* |
Line 514 try586: /* Use the `cpuid' instruction. |
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Line 518 try586: /* Use the `cpuid' instruction. |
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/* Find end of kernel image. */ |
/* Find end of kernel image. */ |
movl $RELOC(end),%edi |
movl $RELOC(end),%edi |
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#if (NKSYMS || defined(DDB) || defined(LKM)) && !defined(SYMTAB_SPACE) |
#if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(SYMTAB_SPACE) |
/* Save the symbols (if loaded). */ |
/* Save the symbols (if loaded). */ |
movl RELOC(esym),%eax |
movl RELOC(esym),%eax |
testl %eax,%eax |
testl %eax,%eax |
Line 646 try586: /* Use the `cpuid' instruction. |
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Line 650 try586: /* Use the `cpuid' instruction. |
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movl %cr0,%eax # get control word |
movl %cr0,%eax # get control word |
# enable paging & NPX emulation |
# enable paging & NPX emulation |
orl $(CR0_PE|CR0_PG|CR0_NE|CR0_TS|CR0_EM|CR0_MP),%eax |
orl $(CR0_PE|CR0_PG|CR0_NE|CR0_TS|CR0_EM|CR0_MP),%eax |
movl %eax,%cr0 # and let's page NOW! |
movl %eax,%cr0 # and page NOW! |
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pushl $begin # jump to high mem |
pushl $begin # jump to high mem |
ret |
ret |
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movw %ax,%fs |
movw %ax,%fs |
movw %ax,%gs |
movw %ax,%gs |
decl %eax |
decl %eax |
movl %eax,RELOC(cpu_info_primary)+CPU_INFO_LEVEL |
movl %eax,RELOC(cpuid_level) |
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xorl %eax,%eax |
xorl %eax,%eax |
cpuid |
cpuid |
movl %eax,RELOC(cpu_info_primary)+CPU_INFO_LEVEL |
movl %eax,RELOC(cpuid_level) |
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call xen_pmap_bootstrap |
call xen_pmap_bootstrap |
/* |
/* |
Line 805 NENTRY(lgdt_finish) |
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Line 809 NENTRY(lgdt_finish) |
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pushl $GSEL(GCODE_SEL, SEL_KPL) |
pushl $GSEL(GCODE_SEL, SEL_KPL) |
pushl %eax |
pushl %eax |
lret |
lret |
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END(lgdt_finish) |
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#endif /* XEN */ |
#endif /* XEN */ |
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Line 829 NENTRY(lwp_trampoline) |
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Line 834 NENTRY(lwp_trampoline) |
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addl $4,%esp |
addl $4,%esp |
jmp .Lsyscall_checkast |
jmp .Lsyscall_checkast |
/* NOTREACHED */ |
/* NOTREACHED */ |
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END(lwp_trampoline) |
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/* |
/* |
* sigcode() |
* sigcode() |
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int $0x80 # exit if sigreturn fails |
int $0x80 # exit if sigreturn fails |
.globl _C_LABEL(esigcode) |
.globl _C_LABEL(esigcode) |
_C_LABEL(esigcode): |
_C_LABEL(esigcode): |
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END(sigcode) |
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/* |
/* |
* int setjmp(label_t *) |
* int setjmp(label_t *) |
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movl %edx,20(%eax) # save eip |
movl %edx,20(%eax) # save eip |
xorl %eax,%eax # return 0 |
xorl %eax,%eax # return 0 |
ret |
ret |
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END(setjmp) |
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/* |
/* |
* int longjmp(label_t *) |
* int longjmp(label_t *) |
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movl %edx,(%esp) # put in return frame |
movl %edx,(%esp) # put in return frame |
movl $1,%eax # return 1 |
movl $1,%eax # return 1 |
ret |
ret |
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END(longjmp) |
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/* |
/* |
* void dumpsys(void) |
* void dumpsys(void) |
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call _C_LABEL(dodumpsys) # dump! |
call _C_LABEL(dodumpsys) # dump! |
addl $(3*4), %esp # unwind switchframe |
addl $(3*4), %esp # unwind switchframe |
ret |
ret |
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END(dumpsys) |
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/* |
/* |
* struct lwp *cpu_switchto(struct lwp *oldlwp, struct newlwp, |
* struct lwp *cpu_switchto(struct lwp *oldlwp, struct *newlwp, |
* bool returning) |
* bool returning) |
* |
* |
* 1. if (oldlwp != NULL), save its context. |
* 1. if (oldlwp != NULL), save its context. |
Line 919 ENTRY(cpu_switchto) |
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Line 929 ENTRY(cpu_switchto) |
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#if defined(DIAGNOSTIC) && !defined(XEN) |
#if defined(DIAGNOSTIC) && !defined(XEN) |
cmpl $IPL_SCHED,CPUVAR(ILEVEL) |
cmpl $IPL_SCHED,CPUVAR(ILEVEL) |
jbe 0f |
jbe 0f |
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pushl CPUVAR(ILEVEL) |
pushl $.Lstr |
pushl $.Lstr |
call _C_LABEL(panic) |
call _C_LABEL(panic) |
addl $4,%esp |
addl $8,%esp |
.Lstr: .string "cpu_switcho: switching above IPL_SCHED\0" |
.Lstr: .string "cpu_switchto: switching above IPL_SCHED (%d)\0" |
0: |
0: |
#endif |
#endif |
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Line 998 ENTRY(cpu_switchto) |
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Line 1009 ENTRY(cpu_switchto) |
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2: |
2: |
#ifndef XEN |
#ifndef XEN |
movl $IPL_IPI,CPUVAR(ILEVEL) |
movl $IPL_IPI,CPUVAR(ILEVEL) |
movl PCB_CR0(%ebx),%ecx |
movl PCB_CR0(%ebx),%ecx /* has CR0_TS clear */ |
movl %cr0,%edx |
movl %cr0,%edx |
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/* |
/* |
* If our floating point registers are on a different CPU, |
* If our floating point registers are on a different CPU, |
* set CR0_TS so we'll trap rather than reuse bogus state. |
* set CR0_TS so we'll trap rather than reuse bogus state. |
*/ |
*/ |
movl PCB_FPCPU(%ebx),%eax |
cmpl CPUVAR(FPCURLWP),%edi |
cmpl CPUVAR(SELF),%eax |
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je 3f |
je 3f |
orl $CR0_TS,%ecx |
orl $CR0_TS,%ecx |
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Line 1037 ENTRY(cpu_switchto) |
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Line 1047 ENTRY(cpu_switchto) |
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.Lcopy_iobitmap: |
.Lcopy_iobitmap: |
/* Copy I/O bitmap. */ |
/* Copy I/O bitmap. */ |
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incl _C_LABEL(pmap_iobmp_evcnt)+EV_COUNT |
movl $(IOMAPSIZE/4),%ecx |
movl $(IOMAPSIZE/4),%ecx |
pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
Line 1049 ENTRY(cpu_switchto) |
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Line 1060 ENTRY(cpu_switchto) |
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popl %esi |
popl %esi |
movl $((CPU_INFO_IOMAP - CPU_INFO_TSS) << 16),CPUVAR(IOBASE) |
movl $((CPU_INFO_IOMAP - CPU_INFO_TSS) << 16),CPUVAR(IOBASE) |
jmp .Liobitmap_done |
jmp .Liobitmap_done |
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END(cpu_switchto) |
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/* |
/* |
* void savectx(struct pcb *pcb); |
* void savectx(struct pcb *pcb); |
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movl %esp,PCB_ESP(%edx) |
movl %esp,PCB_ESP(%edx) |
movl %ebp,PCB_EBP(%edx) |
movl %ebp,PCB_EBP(%edx) |
ret |
ret |
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END(savectx) |
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/* |
/* |
* osyscall() |
* osyscall() |
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* Old call gate entry for syscall |
* Old call gate entry for syscall |
*/ |
*/ |
IDTVEC(osyscall) |
IDTVEC(osyscall) |
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cli # must be first instruction |
pushfl # set eflags in trap frame |
pushfl # set eflags in trap frame |
popl 8(%esp) |
popl 8(%esp) |
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orl $PSL_I,(%esp) # re-enable ints on return to user |
pushl $7 # size of instruction for restart |
pushl $7 # size of instruction for restart |
jmp syscall1 |
jmp syscall1 |
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IDTVEC_END(osyscall) |
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/* |
/* |
* syscall() |
* syscall() |
Line 1082 IDTVEC(syscall) |
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Line 1098 IDTVEC(syscall) |
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syscall1: |
syscall1: |
pushl $T_ASTFLT # trap # for doing ASTs |
pushl $T_ASTFLT # trap # for doing ASTs |
INTRENTRY |
INTRENTRY |
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STI(%eax) |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
movl CPUVAR(ILEVEL),%ebx |
movl CPUVAR(ILEVEL),%ebx |
testl %ebx,%ebx |
testl %ebx,%ebx |
jz 1f |
jz 1f |
pushl $5f |
pushl $5f |
call _C_LABEL(printf) |
call _C_LABEL(panic) |
addl $4,%esp |
addl $4,%esp |
#ifdef DDB |
#ifdef DDB |
int $3 |
int $3 |
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INTRFASTEXIT |
INTRFASTEXIT |
3: STI(%eax) |
3: STI(%eax) |
pushl $4f |
pushl $4f |
call _C_LABEL(printf) |
call _C_LABEL(panic) |
addl $4,%esp |
addl $4,%esp |
pushl $IPL_NONE |
pushl $IPL_NONE |
call _C_LABEL(spllower) |
call _C_LABEL(spllower) |
addl $4,%esp |
addl $4,%esp |
jmp .Lsyscall_checkast |
jmp .Lsyscall_checkast |
4: .asciz "WARNING: SPL NOT LOWERED ON SYSCALL EXIT\n" |
4: .asciz "SPL NOT LOWERED ON SYSCALL EXIT\n" |
5: .asciz "WARNING: SPL NOT ZERO ON SYSCALL ENTRY\n" |
5: .asciz "SPL NOT ZERO ON SYSCALL ENTRY\n" |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
9: |
9: |
cmpl $0, CPUVAR(WANT_PMAPLOAD) |
cmpl $0, CPUVAR(WANT_PMAPLOAD) |
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call _C_LABEL(trap) |
call _C_LABEL(trap) |
addl $4,%esp |
addl $4,%esp |
jmp .Lsyscall_checkast /* re-check ASTs */ |
jmp .Lsyscall_checkast /* re-check ASTs */ |
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IDTVEC_END(syscall) |
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IDTVEC(svr4_fasttrap) |
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pushl $2 # size of instruction for restart |
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pushl $T_ASTFLT # trap # for doing ASTs |
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INTRENTRY |
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STI(%eax) |
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pushl $RW_READER |
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pushl $_C_LABEL(svr4_fasttrap_lock) |
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call _C_LABEL(rw_enter) |
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addl $8,%esp |
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call *_C_LABEL(svr4_fasttrap_vec) |
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pushl $_C_LABEL(svr4_fasttrap_lock) |
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call _C_LABEL(rw_exit) |
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addl $4,%esp |
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2: /* Check for ASTs on exit to user mode. */ |
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cli |
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CHECK_ASTPENDING(%eax) |
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je 1f |
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/* Always returning to user mode here. */ |
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CLEAR_ASTPENDING(%eax) |
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sti |
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/* Pushed T_ASTFLT into tf_trapno on entry. */ |
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pushl %esp |
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call _C_LABEL(trap) |
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addl $4,%esp |
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jmp 2b |
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1: CHECK_DEFERRED_SWITCH |
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jnz 9f |
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INTRFASTEXIT |
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9: sti |
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call _C_LABEL(pmap_load) |
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cli |
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jmp 2b |
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#if NNPX > 0 |
#if NNPX > 0 |
/* |
/* |
Line 1184 NENTRY(probeintr) |
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Line 1235 NENTRY(probeintr) |
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outb %al,$0xf0 # clear BUSY# latch |
outb %al,$0xf0 # clear BUSY# latch |
popl %eax |
popl %eax |
iret |
iret |
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END(probeintr) |
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/* |
/* |
* void probetrap(void) |
* void probetrap(void) |
Line 1193 NENTRY(probetrap) |
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Line 1245 NENTRY(probetrap) |
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incl _C_LABEL(npx_traps_while_probing) |
incl _C_LABEL(npx_traps_while_probing) |
fnclex |
fnclex |
iret |
iret |
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END(probetrap) |
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/* |
/* |
* int npx586bug1(int a, int b) |
* int npx586bug1(int a, int b) |
Line 1208 NENTRY(npx586bug1) |
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Line 1261 NENTRY(npx586bug1) |
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fistpl (%esp) |
fistpl (%esp) |
popl %eax |
popl %eax |
ret |
ret |
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END(npx586bug1) |
#endif /* NNPX > 0 */ |
#endif /* NNPX > 0 */ |
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/* |
/* |
* void sse2_zero_page(void *pg) |
* void sse2_idlezero_page(void *pg) |
* |
* |
* Zero a page without polluting the cache. |
* Zero a page without polluting the cache. Preemption must be |
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* disabled by the caller. Abort if a preemption is pending. |
*/ |
*/ |
ENTRY(sse2_zero_page) |
ENTRY(sse2_idlezero_page) |
pushl %ebp |
pushl %ebp |
movl %esp,%ebp |
movl %esp,%ebp |
movl 8(%esp), %edx |
movl 8(%esp), %edx |
movl $PAGE_SIZE, %ecx |
movl $(PAGE_SIZE/32), %ecx |
xorl %eax, %eax |
xorl %eax, %eax |
.align 16 |
.align 16 |
1: |
1: |
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testl $RESCHED_KPREEMPT, CPUVAR(RESCHED) |
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jnz 2f |
movnti %eax, 0(%edx) |
movnti %eax, 0(%edx) |
movnti %eax, 4(%edx) |
movnti %eax, 4(%edx) |
movnti %eax, 8(%edx) |
movnti %eax, 8(%edx) |
Line 1231 ENTRY(sse2_zero_page) |
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Line 1288 ENTRY(sse2_zero_page) |
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movnti %eax, 20(%edx) |
movnti %eax, 20(%edx) |
movnti %eax, 24(%edx) |
movnti %eax, 24(%edx) |
movnti %eax, 28(%edx) |
movnti %eax, 28(%edx) |
subl $32, %ecx |
addl $32, %edx |
leal 32(%edx), %edx |
decl %ecx |
jnz 1b |
jnz 1b |
sfence |
sfence |
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incl %eax |
pop %ebp |
pop %ebp |
ret |
ret |
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2: |
/* |
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* void sse2_copy_page(void *src, void *dst) |
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* |
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* Copy a page without polluting the cache. |
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*/ |
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ENTRY(sse2_copy_page) |
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pushl %ebp |
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pushl %ebx |
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pushl %esi |
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pushl %edi |
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movl 20(%esp), %esi |
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movl 24(%esp), %edi |
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movl $PAGE_SIZE, %ebp |
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.align 16 |
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1: |
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movl 0(%esi), %eax |
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movl 4(%esi), %ebx |
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movl 8(%esi), %ecx |
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movl 12(%esi), %edx |
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movnti %eax, 0(%edi) |
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movnti %ebx, 4(%edi) |
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movnti %ecx, 8(%edi) |
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movnti %edx, 12(%edi) |
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subl $16, %ebp |
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leal 16(%esi), %esi |
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leal 16(%edi), %edi |
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jnz 1b |
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sfence |
sfence |
popl %edi |
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popl %esi |
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popl %ebx |
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popl %ebp |
popl %ebp |
ret |
ret |
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END(sse2_idlezero_page) |