version 1.29, 2004/08/05 15:25:29 |
version 1.32, 2005/03/02 12:00:25 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
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/*- |
/*- |
* Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. |
* Copyright (c) 1998, 2000, 2004 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 |
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#include <machine/asm.h> |
#include <machine/asm.h> |
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#if defined(MULTIPROCESSOR) |
#if defined(MULTIPROCESSOR) |
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#define SET_CURLWP(lwp,cpu) \ |
#define SET_CURLWP(lwp,cpu) \ |
movl CPUVAR(SELF),cpu ; \ |
movl CPUVAR(SELF),cpu ; \ |
movl lwp,CPUVAR(CURLWP) ; \ |
movl lwp,CPUVAR(CURLWP) ; \ |
movl cpu,L_CPU(lwp) |
movl cpu,L_CPU(lwp) |
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#else |
#else |
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#define SET_CURLWP(lwp,tcpu) movl lwp,CPUVAR(CURLWP) |
#define SET_CURLWP(lwp,tcpu) movl lwp,CPUVAR(CURLWP) |
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#endif |
#endif |
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#define GET_CURPCB(reg) movl CPUVAR(CURPCB),reg |
#define GET_CURPCB(reg) movl CPUVAR(CURPCB),reg |
#define SET_CURPCB(reg) movl reg,CPUVAR(CURPCB) |
#define SET_CURPCB(reg) movl reg,CPUVAR(CURPCB) |
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#define CLEAR_RESCHED(reg) movl reg,CPUVAR(RESCHED) |
#define CLEAR_RESCHED(reg) movl reg,CPUVAR(RESCHED) |
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#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
#include <machine/i82489reg.h> |
#include <machine/i82489reg.h> |
#endif |
#endif |
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/* |
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* PTmap is recursive pagemap at top of virtual address space. |
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* Within PTmap, the page directory can be found (third indirection). |
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* |
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* XXX 4 == sizeof pde |
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*/ |
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.set _C_LABEL(PTmap),(PDSLOT_PTE << PDSHIFT) |
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.set _C_LABEL(PTD),(_C_LABEL(PTmap) + PDSLOT_PTE * PAGE_SIZE) |
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.set _C_LABEL(PTDpde),(_C_LABEL(PTD) + PDSLOT_PTE * 4) |
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/* |
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* APTmap, APTD is the alternate recursive pagemap. |
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* It's used when modifying another process's page tables. |
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* |
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* XXX 4 == sizeof pde |
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*/ |
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.set _C_LABEL(APTmap),(PDSLOT_APTE << PDSHIFT) |
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.set _C_LABEL(APTD),(_C_LABEL(APTmap) + PDSLOT_APTE * PAGE_SIZE) |
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.set _C_LABEL(APTDpde),(_C_LABEL(PTD) + PDSLOT_APTE * 4) |
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/* This shouldn't conflict with a macro of the same name defined in pmap.h */ |
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#define PTE_BASE (PDSLOT_PTE << PDSHIFT) |
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/* |
/* |
* Initialization |
* Initialization |
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#ifdef COMPAT_OLDBOOT |
#ifdef COMPAT_OLDBOOT |
.globl _C_LABEL(bootdev) |
.globl _C_LABEL(bootdev) |
#endif |
#endif |
.globl _C_LABEL(proc0paddr),_C_LABEL(PTDpaddr) |
.globl _C_LABEL(proc0paddr),_C_LABEL(PDPpaddr) |
.globl _C_LABEL(biosbasemem),_C_LABEL(biosextmem) |
.globl _C_LABEL(biosbasemem),_C_LABEL(biosextmem) |
.globl _C_LABEL(gdt) |
.globl _C_LABEL(gdt) |
#ifdef I586_CPU |
#ifdef I586_CPU |
.globl _C_LABEL(idt) |
.globl _C_LABEL(idt) |
#endif |
#endif |
.globl _C_LABEL(lapic_tpr) |
.globl _C_LABEL(lapic_tpr) |
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#if NLAPIC > 0 |
#if NLAPIC > 0 |
#ifdef __ELF__ |
#ifdef __ELF__ |
.align PAGE_SIZE |
.align PAGE_SIZE |
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.globl _C_LABEL(local_apic), _C_LABEL(lapic_id) |
.globl _C_LABEL(local_apic), _C_LABEL(lapic_id) |
_C_LABEL(local_apic): |
_C_LABEL(local_apic): |
.space LAPIC_ID |
.space LAPIC_ID |
_C_LABEL(lapic_id): |
_C_LABEL(lapic_id): |
.long 0x00000000 |
.long 0x00000000 |
.space LAPIC_TPRI-(LAPIC_ID+4) |
.space LAPIC_TPRI-(LAPIC_ID+4) |
_C_LABEL(lapic_tpr): |
_C_LABEL(lapic_tpr): |
.space LAPIC_PPRI-LAPIC_TPRI |
.space LAPIC_PPRI-LAPIC_TPRI |
_C_LABEL(lapic_ppr): |
_C_LABEL(lapic_ppr): |
.space LAPIC_ISR-LAPIC_PPRI |
.space LAPIC_ISR-LAPIC_PPRI |
_C_LABEL(lapic_isr): |
_C_LABEL(lapic_isr): |
.space PAGE_SIZE-LAPIC_ISR |
.space PAGE_SIZE-LAPIC_ISR |
#else |
#else |
_C_LABEL(lapic_tpr): |
_C_LABEL(lapic_tpr): |
.long 0 |
.long 0 |
#endif |
#endif |
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_C_LABEL(cpu): .long 0 # are we 386, 386sx, or 486, |
_C_LABEL(cpu): .long 0 # are we 386, 386sx, or 486, |
# or Pentium, or.. |
# or Pentium, or.. |
_C_LABEL(esym): .long 0 # ptr to end of syms |
_C_LABEL(esym): .long 0 # ptr to end of syms |
_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(proc0paddr): .long 0 |
_C_LABEL(proc0paddr): .long 0 |
_C_LABEL(PTDpaddr): .long 0 # paddr of PTD, for libkvm |
_C_LABEL(PDPpaddr): .long 0 # paddr of PDP, for libkvm |
#ifndef REALBASEMEM |
#ifndef REALBASEMEM |
_C_LABEL(biosbasemem): .long 0 # base memory reported by BIOS |
_C_LABEL(biosbasemem): .long 0 # base memory reported by BIOS |
#else |
#else |
Line 233 _C_LABEL(biosextmem): .long 0 # extended |
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Line 215 _C_LABEL(biosextmem): .long 0 # extended |
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#else |
#else |
_C_LABEL(biosextmem): .long REALEXTMEM |
_C_LABEL(biosextmem): .long REALEXTMEM |
#endif |
#endif |
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.space 512 |
.space 512 |
tmpstk: |
tmpstk: |
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Line 497 try586: /* Use the `cpuid' instruction. |
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Line 479 try586: /* Use the `cpuid' instruction. |
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/* |
/* |
* Virtual address space of kernel: |
* Virtual address space of kernel: |
* |
* |
* text | data | bss | [syms] | page dir | proc0 kstack |
* text | data | bss | [syms] | page dir | proc0 kstack |
* 0 1 2 3 |
* 0 1 2 3 |
*/ |
*/ |
#define PROC0PDIR ((0) * PAGE_SIZE) |
#define PROC0PDIR ((0) * PAGE_SIZE) |
Line 572 try586: /* Use the `cpuid' instruction. |
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Line 554 try586: /* Use the `cpuid' instruction. |
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/* Calculate end of text segment, rounded to a page. */ |
/* Calculate end of text segment, rounded to a page. */ |
leal (RELOC(etext)+PGOFSET),%edx |
leal (RELOC(etext)+PGOFSET),%edx |
andl $~PGOFSET,%edx |
andl $~PGOFSET,%edx |
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/* Skip over the first 1MB. */ |
/* Skip over the first 1MB. */ |
movl $_RELOC(KERNTEXTOFF),%eax |
movl $_RELOC(KERNTEXTOFF),%eax |
movl %eax,%ecx |
movl %eax,%ecx |
Line 620 try586: /* Use the `cpuid' instruction. |
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Line 602 try586: /* Use the `cpuid' instruction. |
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leal (PROC0PDIR+PG_V|PG_KW)(%esi),%eax # pte for ptd |
leal (PROC0PDIR+PG_V|PG_KW)(%esi),%eax # pte for ptd |
movl %eax,(PROC0PDIR+PDSLOT_PTE*4)(%esi) # recursive PD slot |
movl %eax,(PROC0PDIR+PDSLOT_PTE*4)(%esi) # recursive PD slot |
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/* Save phys. addr of PTD, for libkvm. */ |
/* Save phys. addr of PDP, for libkvm. */ |
movl %esi,RELOC(PTDpaddr) |
movl %esi,RELOC(PDPpaddr) |
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/* Load base of page directory and enable mapping. */ |
/* Load base of page directory and enable mapping. */ |
movl %esi,%eax # phys address of ptd in proc 0 |
movl %esi,%eax # phys address of ptd in proc 0 |
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pushl %esp |
pushl %esp |
call _C_LABEL(initgdt) |
call _C_LABEL(initgdt) |
addl $4,%esp |
addl $4,%esp |
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movl _C_LABEL(nkpde),%eax |
movl _C_LABEL(nkpde),%eax |
shll $PGSHIFT,%eax |
shll $PGSHIFT,%eax |
addl $TABLESIZE,%eax |
addl $TABLESIZE,%eax |
Line 882 ENTRY(i386_copyout) |
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Line 864 ENTRY(i386_copyout) |
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pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
pushl $0 |
pushl $0 |
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movl 16(%esp),%esi |
movl 16(%esp),%esi |
movl 20(%esp),%edi |
movl 20(%esp),%edi |
movl 24(%esp),%eax |
movl 24(%esp),%eax |
Line 922 ENTRY(i386_copyout) |
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Line 904 ENTRY(i386_copyout) |
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movl $2f,PCB_ONFAULT(%edx) |
movl $2f,PCB_ONFAULT(%edx) |
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1: /* Check PTE for each page. */ |
1: /* Check PTE for each page. */ |
testb $PG_RW,_C_LABEL(PTmap)(,%edi,4) |
testb $PG_RW,PTE_BASE(,%edi,4) |
jz 2f |
jz 2f |
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4: incl %edi |
4: incl %edi |
decl %ecx |
decl %ecx |
jns 1b |
jns 1b |
Line 932 ENTRY(i386_copyout) |
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Line 914 ENTRY(i386_copyout) |
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movl 20(%esp),%edi |
movl 20(%esp),%edi |
movl 24(%esp),%eax |
movl 24(%esp),%eax |
jmp 3f |
jmp 3f |
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2: /* Simulate a trap. */ |
2: /* Simulate a trap. */ |
pushl %ecx |
pushl %ecx |
movl %edi,%eax |
movl %edi,%eax |
Line 972 ENTRY(i486_copyout) |
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Line 954 ENTRY(i486_copyout) |
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pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
pushl $0 |
pushl $0 |
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movl 16(%esp),%esi |
movl 16(%esp),%esi |
movl 20(%esp),%edi |
movl 20(%esp),%edi |
movl 24(%esp),%eax |
movl 24(%esp),%eax |
Line 1027 ENTRY(i386_copyin) |
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Line 1009 ENTRY(i386_copyin) |
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GET_CURPCB(%eax) |
GET_CURPCB(%eax) |
pushl $0 |
pushl $0 |
movl $_C_LABEL(copy_fault),PCB_ONFAULT(%eax) |
movl $_C_LABEL(copy_fault),PCB_ONFAULT(%eax) |
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movl 16(%esp),%esi |
movl 16(%esp),%esi |
movl 20(%esp),%edi |
movl 20(%esp),%edi |
movl 24(%esp),%eax |
movl 24(%esp),%eax |
Line 1132 ENTRY(copyoutstr) |
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Line 1114 ENTRY(copyoutstr) |
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movl %edi,%eax |
movl %edi,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
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testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 2f |
jnz 2f |
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6: /* Simulate a trap. */ |
6: /* Simulate a trap. */ |
Line 1219 ENTRY(copyoutstr) |
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Line 1201 ENTRY(copyoutstr) |
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ENTRY(copyinstr) |
ENTRY(copyinstr) |
pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
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DO_DEFERRED_SWITCH(%eax) |
DO_DEFERRED_SWITCH(%eax) |
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GET_CURPCB(%ecx) |
GET_CURPCB(%ecx) |
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movl (%edx),%eax |
movl (%edx),%eax |
movl $0,PCB_ONFAULT(%ecx) |
movl $0,PCB_ONFAULT(%ecx) |
ret |
ret |
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/* |
/* |
* int fusword(const void *uaddr); |
* int fusword(const void *uaddr); |
* Fetch a short from the user's address space. |
* Fetch a short from the user's address space. |
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movzwl (%edx),%eax |
movzwl (%edx),%eax |
movl $0,PCB_ONFAULT(%ecx) |
movl $0,PCB_ONFAULT(%ecx) |
ret |
ret |
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/* |
/* |
* int fuswintr(const void *uaddr); |
* int fuswintr(const void *uaddr); |
* Fetch a short from the user's address space. Can be called during an |
* Fetch a short from the user's address space. Can be called during an |
Line 1379 ENTRY(fuswintr) |
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Line 1361 ENTRY(fuswintr) |
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movzwl (%edx),%eax |
movzwl (%edx),%eax |
movl $0,PCB_ONFAULT(%ecx) |
movl $0,PCB_ONFAULT(%ecx) |
ret |
ret |
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/* |
/* |
* int fubyte(const void *uaddr); |
* int fubyte(const void *uaddr); |
* Fetch a byte from the user's address space. |
* Fetch a byte from the user's address space. |
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movl %edx,%eax |
movl %edx,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 1f |
jnz 1f |
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3: /* Simulate a trap. */ |
3: /* Simulate a trap. */ |
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xorl %eax,%eax |
xorl %eax,%eax |
movl %eax,PCB_ONFAULT(%ecx) |
movl %eax,PCB_ONFAULT(%ecx) |
ret |
ret |
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/* |
/* |
* int susword(void *uaddr, short x); |
* int susword(void *uaddr, short x); |
* Store a short in the user's address space. |
* Store a short in the user's address space. |
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movl %edx,%eax |
movl %edx,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 1f |
jnz 1f |
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3: /* Simulate a trap. */ |
3: /* Simulate a trap. */ |
Line 1546 ENTRY(suswintr) |
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Line 1528 ENTRY(suswintr) |
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movl %edx,%eax |
movl %edx,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 1f |
jnz 1f |
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/* Simulate a trap. */ |
/* Simulate a trap. */ |
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jne 2f |
jne 2f |
#endif /* I486_CPU || I586_CPU || I686_CPU */ |
#endif /* I486_CPU || I586_CPU || I686_CPU */ |
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GET_CURPCB(%eax) |
GET_CURPCB(%eax) |
movl $3f,PCB_ONFAULT(%eax) |
movl $3f,PCB_ONFAULT(%eax) |
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movl %edx,%eax |
movl %edx,%eax |
shrl $PGSHIFT,%eax # calculate pte address |
shrl $PGSHIFT,%eax # calculate pte address |
testb $PG_RW,_C_LABEL(PTmap)(,%eax,4) |
testb $PG_RW,PTE_BASE(,%eax,4) |
jnz 1f |
jnz 1f |
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3: /* Simulate a trap. */ |
3: /* Simulate a trap. */ |
Line 1696 NENTRY(switch_error) |
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Line 1678 NENTRY(switch_error) |
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* Find a runnable process and switch to it. Wait if necessary. If the new |
* Find a runnable process and switch to it. Wait if necessary. If the new |
* process is the same as the old one, we short-circuit the context save and |
* process is the same as the old one, we short-circuit the context save and |
* restore. |
* restore. |
* |
* |
* Note that the stack frame layout is known to "struct switchframe" |
* Note that the stack frame layout is known to "struct switchframe" |
* in <machine/frame.h> and to the code in cpu_fork() which initializes |
* in <machine/frame.h> and to the code in cpu_fork() which initializes |
* it for a new lwp. |
* it for a new lwp. |
*/ |
*/ |
ENTRY(cpu_switch) |
ENTRY(cpu_switch) |
Line 1713 ENTRY(cpu_switch) |
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Line 1695 ENTRY(cpu_switch) |
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call _C_LABEL(panic) |
call _C_LABEL(panic) |
/* NOTREACHED */ |
/* NOTREACHED */ |
2: .asciz "not splsched() in cpu_switch!" |
2: .asciz "not splsched() in cpu_switch!" |
1: |
1: |
#endif /* DEBUG */ |
#endif /* DEBUG */ |
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movl 16(%esp),%esi # current |
movl 16(%esp),%esi # current |
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/* |
/* |
Line 1803 ENTRY(cpu_switch) |
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Line 1785 ENTRY(cpu_switch) |
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xorl %esi,%esi |
xorl %esi,%esi |
sti |
sti |
idle_unlock: |
idle_unlock: |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
call _C_LABEL(sched_unlock_idle) |
call _C_LABEL(sched_unlock_idle) |
#endif |
#endif |
/* Interrupts are okay again. */ |
/* Interrupts are okay again. */ |
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call _C_LABEL(Xspllower) # process pending interrupts |
call _C_LABEL(Xspllower) # process pending interrupts |
addl $4,%esp |
addl $4,%esp |
jmp idle_start |
jmp idle_start |
idle_zero: |
idle_zero: |
sti |
sti |
call _C_LABEL(uvm_pageidlezero) |
call _C_LABEL(uvm_pageidlezero) |
cli |
cli |
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sti |
sti |
hlt |
hlt |
NENTRY(mpidle) |
NENTRY(mpidle) |
idle_start: |
idle_start: |
cli |
cli |
cmpl $0,_C_LABEL(sched_whichqs) |
cmpl $0,_C_LABEL(sched_whichqs) |
jz idle_loop |
jz idle_loop |
idle_exit: |
idle_exit: |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh |
sti |
sti |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
call _C_LABEL(sched_lock_idle) |
call _C_LABEL(sched_lock_idle) |
#endif |
#endif |
movl _C_LABEL(sched_whichqs),%ecx |
movl _C_LABEL(sched_whichqs),%ecx |
bsfl %ecx,%ebx |
bsfl %ecx,%ebx |
jz idle_unlock |
jz idle_unlock |
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switch_dequeue: |
switch_dequeue: |
/* |
/* |
* we're running at splhigh(), but it's otherwise okay to take |
* we're running at splhigh(), but it's otherwise okay to take |
* interrupts here. |
* interrupts here. |
*/ |
*/ |
sti |
sti |
leal _C_LABEL(sched_qs)(,%ebx,8),%eax # select q |
leal _C_LABEL(sched_qs)(,%ebx,8),%eax # select q |
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movl %eax,PCB_CR3(%esi) /* XXX should be done by pmap_activate? */ |
movl %eax,PCB_CR3(%esi) /* XXX should be done by pmap_activate? */ |
#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
movl CPUVAR(GDT),%eax |
movl CPUVAR(GDT),%eax |
#else |
#else |
/* Load TSS info. */ |
/* Load TSS info. */ |
movl _C_LABEL(gdt),%eax |
movl _C_LABEL(gdt),%eax |
#endif |
#endif |
Line 1958 switch_restored: |
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Line 1940 switch_restored: |
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/* Restore cr0 (including FPU state). */ |
/* Restore cr0 (including FPU state). */ |
movl PCB_CR0(%esi),%ecx |
movl PCB_CR0(%esi),%ecx |
#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
/* |
/* |
* If our floating point registers are on a different CPU, |
* If our floating point registers are on a different CPU, |
* clear CR0_TS so we'll trap rather than reuse bogus state. |
* clear CR0_TS so we'll trap rather than reuse bogus state. |
*/ |
*/ |
Line 1966 switch_restored: |
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Line 1948 switch_restored: |
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cmpl CPUVAR(SELF),%ebx |
cmpl CPUVAR(SELF),%ebx |
jz 1f |
jz 1f |
orl $CR0_TS,%ecx |
orl $CR0_TS,%ecx |
1: |
1: |
#endif |
#endif |
movl %ecx,%cr0 |
movl %ecx,%cr0 |
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/* Record new pcb. */ |
/* Record new pcb. */ |
Line 1987 switch_restored: |
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Line 1969 switch_restored: |
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movl $1,%ebx |
movl $1,%ebx |
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switch_return: |
switch_return: |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
call _C_LABEL(sched_unlock_idle) |
call _C_LABEL(sched_unlock_idle) |
#endif |
#endif |
cmpl $0,CPUVAR(IPENDING) |
cmpl $0,CPUVAR(IPENDING) |
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movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh() |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh() |
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movl %ebx,%eax |
movl %ebx,%eax |
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popl %edi |
popl %edi |
popl %esi |
popl %esi |
popl %ebx |
popl %ebx |
Line 2062 ENTRY(cpu_switchto) |
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Line 2044 ENTRY(cpu_switchto) |
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/* |
/* |
* void cpu_exit(struct lwp *l) |
* void cpu_exit(struct lwp *l) |
* Switch to the appropriate idle context (lwp0's if uniprocessor; the CPU's |
* Switch to the appropriate idle context (lwp0's if uniprocessor; the CPU's |
* if multiprocessor) and deallocate the address space and kernel stack for p. |
* if multiprocessor) and deallocate the address space and kernel stack for p. |
* Then jump into cpu_switch(), as if we were in the idle proc all along. |
* Then jump into cpu_switch(), as if we were in the idle proc all along. |
*/ |
*/ |
#ifndef MULTIPROCESSOR |
#ifndef MULTIPROCESSOR |
Line 2097 ENTRY(cpu_exit) |
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Line 2079 ENTRY(cpu_exit) |
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movl %eax,PCB_CR3(%esi) |
movl %eax,PCB_CR3(%esi) |
#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
movl CPUVAR(GDT),%eax |
movl CPUVAR(GDT),%eax |
#else |
#else |
/* Load TSS info. */ |
/* Load TSS info. */ |
movl _C_LABEL(gdt),%eax |
movl _C_LABEL(gdt),%eax |
#endif |
#endif |
Line 2136 ENTRY(cpu_exit) |
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Line 2118 ENTRY(cpu_exit) |
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/* LINTSTUB: Func: void savectx(struct pcb *pcb) */ |
/* LINTSTUB: Func: void savectx(struct pcb *pcb) */ |
ENTRY(savectx) |
ENTRY(savectx) |
movl 4(%esp),%edx # edx = p->p_addr |
movl 4(%esp),%edx # edx = p->p_addr |
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/* Save stack pointers. */ |
/* Save stack pointers. */ |
movl %esp,PCB_ESP(%edx) |
movl %esp,PCB_ESP(%edx) |
movl %ebp,PCB_EBP(%edx) |
movl %ebp,PCB_EBP(%edx) |
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#ifdef DDB |
#ifdef DDB |
int $3 |
int $3 |
#endif |
#endif |
1: |
1: |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
movl CPUVAR(CURLWP),%edx |
movl CPUVAR(CURLWP),%edx |
movl %esp,L_MD_REGS(%edx) # save pointer to frame |
movl %esp,L_MD_REGS(%edx) # save pointer to frame |
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movl $IPL_NONE,CPUVAR(ILEVEL) |
movl $IPL_NONE,CPUVAR(ILEVEL) |
jmp 2b |
jmp 2b |
4: .asciz "WARNING: SPL NOT LOWERED ON SYSCALL EXIT\n" |
4: .asciz "WARNING: SPL NOT LOWERED ON SYSCALL EXIT\n" |
5: .asciz "WARNING: SPL NOT ZERO ON SYSCALL ENTRY\n" |
5: .asciz "WARNING: SPL NOT ZERO ON SYSCALL ENTRY\n" |
6: .asciz "WARNING: WANT PMAPLOAD ON SYSCALL ENTRY\n" |
6: .asciz "WARNING: WANT PMAPLOAD ON SYSCALL ENTRY\n" |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
9: sti |
9: sti |
call _C_LABEL(pmap_load) |
call _C_LABEL(pmap_load) |