version 1.9, 2003/05/13 08:26:32 |
version 1.25.2.2.2.1, 2005/03/16 11:49:59 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
* 3. Neither the name of the University nor the names of its contributors |
* must display the following acknowledgement: |
|
* This product includes software developed by the University of |
|
* California, Berkeley and its contributors. |
|
* 4. Neither the name of the University nor the names of its contributors |
|
* may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* without specific prior written permission. |
* |
* |
|
|
* @(#)locore.s 7.3 (Berkeley) 5/13/91 |
* @(#)locore.s 7.3 (Berkeley) 5/13/91 |
*/ |
*/ |
|
|
|
#include "opt_compat_netbsd.h" |
|
#include "opt_compat_oldboot.h" |
#include "opt_cputype.h" |
#include "opt_cputype.h" |
#include "opt_ddb.h" |
#include "opt_ddb.h" |
#include "opt_ipkdb.h" |
#include "opt_ipkdb.h" |
#include "opt_vm86.h" |
|
#include "opt_user_ldt.h" |
|
#include "opt_dummy_nops.h" |
|
#include "opt_compat_oldboot.h" |
|
#include "opt_multiprocessor.h" |
|
#include "opt_lockdebug.h" |
#include "opt_lockdebug.h" |
|
#include "opt_multiprocessor.h" |
#include "opt_realmem.h" |
#include "opt_realmem.h" |
|
#include "opt_user_ldt.h" |
|
#include "opt_vm86.h" |
|
|
#include "npx.h" |
#include "npx.h" |
#include "assym.h" |
#include "assym.h" |
|
|
|
|
#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) |
|
|
#define CLEAR_RESCHED(reg) movl reg,CPUVAR(RESCHED) |
#define CLEAR_RESCHED(reg) movl reg,CPUVAR(RESCHED) |
|
|
/* XXX temporary kluge; these should not be here */ |
/* XXX temporary kluge; these should not be here */ |
|
|
.data |
.data |
|
|
.globl _C_LABEL(cpu) |
.globl _C_LABEL(cpu) |
.globl _C_LABEL(cpu_feature) |
|
.globl _C_LABEL(esym),_C_LABEL(boothowto) |
.globl _C_LABEL(esym),_C_LABEL(boothowto) |
.globl _C_LABEL(bootinfo),_C_LABEL(atdevbase) |
.globl _C_LABEL(bootinfo),_C_LABEL(atdevbase) |
#ifdef COMPAT_OLDBOOT |
#ifdef COMPAT_OLDBOOT |
Line 224 _C_LABEL(lapic_tpr): |
|
Line 219 _C_LABEL(lapic_tpr): |
|
|
|
_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(cpu_feature): .long 0 # feature flags from 'cpuid' |
|
# instruction |
|
_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 |
Line 245 _C_LABEL(biosextmem): .long REALEXTMEM |
|
Line 238 _C_LABEL(biosextmem): .long REALEXTMEM |
|
tmpstk: |
tmpstk: |
|
|
|
|
#define _RELOC(x) ((x) - KERNBASE) |
#define _RELOC(x) ((x) - KERNBASE_LOCORE) |
#define RELOC(x) _RELOC(_C_LABEL(x)) |
#define RELOC(x) _RELOC(_C_LABEL(x)) |
|
|
.text |
.text |
Line 299 start: movw $0x1234,0x472 # warm boot |
|
Line 292 start: movw $0x1234,0x472 # warm boot |
|
movl 16(%esp),%eax |
movl 16(%esp),%eax |
testl %eax,%eax |
testl %eax,%eax |
jz 1f |
jz 1f |
addl $KERNBASE,%eax |
addl $KERNBASE_LOCORE,%eax |
1: movl %eax,RELOC(esym) |
1: movl %eax,RELOC(esym) |
|
|
movl RELOC(biosextmem),%eax |
movl RELOC(biosextmem),%eax |
Line 519 try586: /* Use the `cpuid' instruction. |
|
Line 512 try586: /* Use the `cpuid' instruction. |
|
movl RELOC(esym),%eax |
movl RELOC(esym),%eax |
testl %eax,%eax |
testl %eax,%eax |
jz 1f |
jz 1f |
subl $KERNBASE,%eax |
subl $KERNBASE_LOCORE,%eax |
movl %eax,%edi |
movl %eax,%edi |
1: |
1: |
#endif |
#endif |
Line 531 try586: /* Use the `cpuid' instruction. |
|
Line 524 try586: /* Use the `cpuid' instruction. |
|
|
|
/* |
/* |
* Calculate the size of the kernel page table directory, and |
* Calculate the size of the kernel page table directory, and |
* how many entries it will have. |
* how many entries it will have. Adjust nkpde to the actual |
|
* kernel size automatically. Account for the bootstrap tables, |
|
* round up, and add an extra 4MB. |
*/ |
*/ |
|
leal TABLESIZE+NBPD+PDOFSET(%edi),%eax |
|
shrl $PDSHIFT,%eax |
movl RELOC(nkpde),%ecx # get nkpde |
movl RELOC(nkpde),%ecx # get nkpde |
cmpl $NKPTP_MIN,%ecx # larger than min? |
cmpl %ecx,%eax |
|
jb 1f |
|
movl %eax,%ecx |
|
1: cmpl $NKPTP_MIN,%ecx # larger than min? |
jge 1f |
jge 1f |
movl $NKPTP_MIN,%ecx # set at min |
movl $NKPTP_MIN,%ecx # set at min |
jmp 2f |
jmp 2f |
1: cmpl $NKPTP_MAX,%ecx # larger than max? |
1: cmpl $NKPTP_MAX,%ecx # larger than max? |
jle 2f |
jle 2f |
movl $NKPTP_MAX,%ecx |
movl $NKPTP_MAX,%ecx |
2: |
2: movl %ecx,RELOC(nkpde) |
|
|
/* Clear memory for bootstrap tables. */ |
/* Clear memory for bootstrap tables. */ |
shll $PGSHIFT,%ecx |
shll $PGSHIFT,%ecx |
Line 635 try586: /* Use the `cpuid' instruction. |
|
Line 635 try586: /* Use the `cpuid' instruction. |
|
ret |
ret |
|
|
begin: |
begin: |
/* Now running relocated at KERNBASE. Remove double mapping. */ |
/* Now running relocated at KERNBASE_LOCORE. Remove double mapping. */ |
movl _C_LABEL(nkpde),%ecx # for this many pde s, |
movl _C_LABEL(nkpde),%ecx # for this many pde s, |
leal (PROC0PDIR+0*4)(%esi),%ebx # which is where temp maps! |
leal (PROC0PDIR+0*4)(%esi),%ebx # which is where temp maps! |
addl $(KERNBASE), %ebx # now use relocated address |
addl $(KERNBASE_LOCORE), %ebx # now use relocated address |
1: movl $0,(%ebx) |
1: movl $0,(%ebx) |
addl $4,%ebx # next pde |
addl $4,%ebx # next pde |
loop 1b |
loop 1b |
|
|
/* Relocate atdevbase. */ |
/* Relocate atdevbase. */ |
movl _C_LABEL(nkpde),%edx |
movl _C_LABEL(nkpde),%edx |
shll $PGSHIFT,%edx |
shll $PGSHIFT,%edx |
addl $(TABLESIZE+KERNBASE),%edx |
addl $(TABLESIZE+KERNBASE_LOCORE),%edx |
addl %esi,%edx |
addl %esi,%edx |
movl %edx,_C_LABEL(atdevbase) |
movl %edx,_C_LABEL(atdevbase) |
|
|
/* Set up bootstrap stack. */ |
/* Set up bootstrap stack. */ |
leal (PROC0STACK+KERNBASE)(%esi),%eax |
leal (PROC0STACK+KERNBASE_LOCORE)(%esi),%eax |
movl %eax,_C_LABEL(proc0paddr) |
movl %eax,_C_LABEL(proc0paddr) |
leal (USPACE-FRAMESIZE)(%eax),%esp |
leal (USPACE-FRAMESIZE)(%eax),%esp |
movl %esi,PCB_CR3(%eax) # pcb->pcb_cr3 |
movl %esi,PCB_CR3(%eax) # pcb->pcb_cr3 |
Line 708 NENTRY(proc_trampoline) |
|
Line 708 NENTRY(proc_trampoline) |
|
pushl %ebx |
pushl %ebx |
call *%esi |
call *%esi |
addl $4,%esp |
addl $4,%esp |
|
DO_DEFERRED_SWITCH(%eax) |
INTRFASTEXIT |
INTRFASTEXIT |
/* NOTREACHED */ |
/* NOTREACHED */ |
|
|
/*****************************************************************************/ |
/*****************************************************************************/ |
|
#ifdef COMPAT_16 |
/* |
/* |
* Signal trampoline; copied to top of user stack. |
* Signal trampoline; copied to top of user stack. |
*/ |
*/ |
|
|
leal 12(%esp),%eax # get pointer to sigcontext |
leal 12(%esp),%eax # get pointer to sigcontext |
movl %eax,4(%esp) # put it in the argument slot |
movl %eax,4(%esp) # put it in the argument slot |
# fake return address already there |
# fake return address already there |
movl $SYS___sigreturn14,%eax |
movl $SYS_compat_16___sigreturn14,%eax |
int $0x80 # enter kernel with args on stack |
int $0x80 # enter kernel with args on stack |
movl $SYS_exit,%eax |
movl $SYS_exit,%eax |
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): |
|
#endif |
|
|
/*****************************************************************************/ |
/*****************************************************************************/ |
|
|
|
|
pushl %edi |
pushl %edi |
GET_CURPCB(%eax) # load curpcb into eax and set on-fault |
GET_CURPCB(%eax) # load curpcb into eax and set on-fault |
pushl PCB_ONFAULT(%eax) |
pushl PCB_ONFAULT(%eax) |
movl $_C_LABEL(copy_fault), PCB_ONFAULT(%eax) |
movl $_C_LABEL(kcopy_fault), PCB_ONFAULT(%eax) |
|
|
movl 16(%esp),%esi |
movl 16(%esp),%esi |
movl 20(%esp),%edi |
movl 20(%esp),%edi |
Line 871 _C_LABEL(copyin_func): |
|
Line 873 _C_LABEL(copyin_func): |
|
*/ |
*/ |
/* LINTSTUB: Func: int copyout(const void *kaddr, void *uaddr, size_t len) */ |
/* LINTSTUB: Func: int copyout(const void *kaddr, void *uaddr, size_t len) */ |
ENTRY(copyout) |
ENTRY(copyout) |
|
DO_DEFERRED_SWITCH(%eax) |
jmp *_C_LABEL(copyout_func) |
jmp *_C_LABEL(copyout_func) |
|
|
#if defined(I386_CPU) |
#if defined(I386_CPU) |
Line 1012 ENTRY(i486_copyout) |
|
Line 1015 ENTRY(i486_copyout) |
|
*/ |
*/ |
/* LINTSTUB: Func: int copyin(const void *uaddr, void *kaddr, size_t len) */ |
/* LINTSTUB: Func: int copyin(const void *uaddr, void *kaddr, size_t len) */ |
ENTRY(copyin) |
ENTRY(copyin) |
|
DO_DEFERRED_SWITCH(%eax) |
jmp *_C_LABEL(copyin_func) |
jmp *_C_LABEL(copyin_func) |
|
|
#if defined(I386_CPU) || defined(I486_CPU) || defined(I586_CPU) || \ |
#if defined(I386_CPU) || defined(I486_CPU) || defined(I586_CPU) || \ |
Line 1062 ENTRY(i386_copyin) |
|
Line 1066 ENTRY(i386_copyin) |
|
NENTRY(copy_efault) |
NENTRY(copy_efault) |
movl $EFAULT,%eax |
movl $EFAULT,%eax |
|
|
|
/* |
|
* kcopy_fault is used by kcopy and copy_fault is used by copyin/out. |
|
* |
|
* they're distinguished for lazy pmap switching. see trap(). |
|
*/ |
|
/* LINTSTUB: Ignore */ |
|
NENTRY(kcopy_fault) |
|
GET_CURPCB(%edx) |
|
popl PCB_ONFAULT(%edx) |
|
popl %edi |
|
popl %esi |
|
ret |
|
|
/* LINTSTUB: Ignore */ |
/* LINTSTUB: Ignore */ |
NENTRY(copy_fault) |
NENTRY(copy_fault) |
GET_CURPCB(%edx) |
GET_CURPCB(%edx) |
Line 1083 ENTRY(copyoutstr) |
|
Line 1100 ENTRY(copyoutstr) |
|
pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
|
|
|
DO_DEFERRED_SWITCH(%eax) |
|
|
movl 12(%esp),%esi # esi = from |
movl 12(%esp),%esi # esi = from |
movl 16(%esp),%edi # edi = to |
movl 16(%esp),%edi # edi = to |
movl 20(%esp),%edx # edx = maxlen |
movl 20(%esp),%edx # edx = maxlen |
Line 1161 ENTRY(copyoutstr) |
|
Line 1180 ENTRY(copyoutstr) |
|
*/ |
*/ |
movl $VM_MAXUSER_ADDRESS,%eax |
movl $VM_MAXUSER_ADDRESS,%eax |
subl %edi,%eax |
subl %edi,%eax |
|
jc _C_LABEL(copystr_efault) |
cmpl %edx,%eax |
cmpl %edx,%eax |
jae 1f |
jae 1f |
movl %eax,%edx |
movl %eax,%edx |
Line 1200 ENTRY(copyoutstr) |
|
Line 1220 ENTRY(copyoutstr) |
|
ENTRY(copyinstr) |
ENTRY(copyinstr) |
pushl %esi |
pushl %esi |
pushl %edi |
pushl %edi |
|
|
|
DO_DEFERRED_SWITCH(%eax) |
|
|
GET_CURPCB(%ecx) |
GET_CURPCB(%ecx) |
movl $_C_LABEL(copystr_fault),PCB_ONFAULT(%ecx) |
movl $_C_LABEL(copystr_fault),PCB_ONFAULT(%ecx) |
|
|
Line 1212 ENTRY(copyinstr) |
|
Line 1235 ENTRY(copyinstr) |
|
*/ |
*/ |
movl $VM_MAXUSER_ADDRESS,%eax |
movl $VM_MAXUSER_ADDRESS,%eax |
subl %esi,%eax |
subl %esi,%eax |
|
jc _C_LABEL(copystr_efault) |
cmpl %edx,%eax |
cmpl %edx,%eax |
jae 1f |
jae 1f |
movl %eax,%edx |
movl %eax,%edx |
|
|
*/ |
*/ |
/* LINTSTUB: Func: long fuword(const void *base) */ |
/* LINTSTUB: Func: long fuword(const void *base) */ |
ENTRY(fuword) |
ENTRY(fuword) |
|
DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-4,%edx |
cmpl $VM_MAXUSER_ADDRESS-4,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
|
|
*/ |
*/ |
/* LINTSTUB: Func: int fusword(const void *base) */ |
/* LINTSTUB: Func: int fusword(const void *base) */ |
ENTRY(fusword) |
ENTRY(fusword) |
|
DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
|
|
*/ |
*/ |
/* LINTSTUB: Func: int fuswintr(const void *base) */ |
/* LINTSTUB: Func: int fuswintr(const void *base) */ |
ENTRY(fuswintr) |
ENTRY(fuswintr) |
|
cmpl $TLBSTATE_VALID, CPUVAR(TLBSTATE) |
|
jnz _C_LABEL(fusuaddrfault) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
Line 1361 ENTRY(fuswintr) |
|
Line 1389 ENTRY(fuswintr) |
|
*/ |
*/ |
/* LINTSTUB: Func: int fubyte(const void *base) */ |
/* LINTSTUB: Func: int fubyte(const void *base) */ |
ENTRY(fubyte) |
ENTRY(fubyte) |
|
DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-1,%edx |
cmpl $VM_MAXUSER_ADDRESS-1,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
Line 1405 NENTRY(fusuaddrfault) |
|
Line 1434 NENTRY(fusuaddrfault) |
|
*/ |
*/ |
/* LINTSTUB: Func: int suword(void *base, long c) */ |
/* LINTSTUB: Func: int suword(void *base, long c) */ |
ENTRY(suword) |
ENTRY(suword) |
|
DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-4,%edx |
cmpl $VM_MAXUSER_ADDRESS-4,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
|
|
*/ |
*/ |
/* LINTSTUB: Func: int susword(void *base, short c) */ |
/* LINTSTUB: Func: int susword(void *base, short c) */ |
ENTRY(susword) |
ENTRY(susword) |
|
DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
|
|
*/ |
*/ |
/* LINTSTUB: Func: int suswintr(void *base, short c) */ |
/* LINTSTUB: Func: int suswintr(void *base, short c) */ |
ENTRY(suswintr) |
ENTRY(suswintr) |
|
cmpl $TLBSTATE_VALID, CPUVAR(TLBSTATE) |
|
jnz _C_LABEL(fusuaddrfault) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
cmpl $VM_MAXUSER_ADDRESS-2,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
Line 1537 ENTRY(suswintr) |
|
Line 1570 ENTRY(suswintr) |
|
*/ |
*/ |
/* LINTSTUB: Func: int subyte(void *base, int c) */ |
/* LINTSTUB: Func: int subyte(void *base, int c) */ |
ENTRY(subyte) |
ENTRY(subyte) |
|
DO_DEFERRED_SWITCH(%eax) |
movl 4(%esp),%edx |
movl 4(%esp),%edx |
cmpl $VM_MAXUSER_ADDRESS-1,%edx |
cmpl $VM_MAXUSER_ADDRESS-1,%edx |
ja _C_LABEL(fusuaddrfault) |
ja _C_LABEL(fusuaddrfault) |
Line 1722 ENTRY(cpu_switch) |
|
Line 1756 ENTRY(cpu_switch) |
|
*/ |
*/ |
|
|
pushl %esi |
pushl %esi |
call _C_LABEL(pmap_deactivate) # pmap_deactivate(oldproc) |
call _C_LABEL(pmap_deactivate2) # pmap_deactivate(oldproc) |
addl $4,%esp |
addl $4,%esp |
|
|
movl L_ADDR(%esi),%esi |
movl L_ADDR(%esi),%esi |
Line 1749 ENTRY(cpu_switch) |
|
Line 1783 ENTRY(cpu_switch) |
|
movl PCB_ESP(%edi),%esp |
movl PCB_ESP(%edi),%esp |
movl PCB_EBP(%edi),%ebp |
movl PCB_EBP(%edi),%ebp |
|
|
|
|
/* Switch address space. */ |
|
movl PCB_CR3(%edi),%ecx |
|
movl %ecx,%cr3 |
|
|
|
/* Switch TSS. Reset "task busy" flag before loading. */ |
/* Switch TSS. Reset "task busy" flag before loading. */ |
|
movl %cr3,%eax |
|
movl %eax,PCB_CR3(%edi) |
#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
movl CPUVAR(GDT),%eax |
movl CPUVAR(GDT),%eax |
#else |
#else |
|
|
jz idle_loop |
jz idle_loop |
idle_exit: |
idle_exit: |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh |
movl $IPL_HIGH,CPUVAR(ILEVEL) # splhigh |
|
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 |
|
|
SET_CURLWP(%edi,%ecx) |
SET_CURLWP(%edi,%ecx) |
|
|
/* Skip context switch if same lwp. */ |
/* Skip context switch if same lwp. */ |
movl $1, %ebx |
xorl %ebx,%ebx |
cmpl %edi,%esi |
cmpl %edi,%esi |
je switch_return |
je switch_return |
|
|
|
|
*/ |
*/ |
|
|
pushl %esi |
pushl %esi |
call _C_LABEL(pmap_deactivate) # pmap_deactivate(oldproc) |
call _C_LABEL(pmap_deactivate2) # pmap_deactivate(oldproc) |
addl $4,%esp |
addl $4,%esp |
|
|
movl L_ADDR(%esi),%esi |
movl L_ADDR(%esi),%esi |
|
|
jnz switch_restored |
jnz switch_restored |
#endif |
#endif |
|
|
|
/* Switch TSS. Reset "task busy" flag before loading. */ |
|
movl %cr3,%eax |
|
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 |
|
|
#endif |
#endif |
movl L_MD_TSS_SEL(%edi),%edx |
movl L_MD_TSS_SEL(%edi),%edx |
|
|
/* Switch TSS. Reset "task busy" flag before loading. */ |
|
andl $~0x0200,4(%eax,%edx, 1) |
andl $~0x0200,4(%eax,%edx, 1) |
ltr %dx |
ltr %dx |
|
|
Line 1927 switch_restored: |
|
Line 1961 switch_restored: |
|
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. |
*/ |
*/ |
movl PCB_FPCPU(%esi),%ebx |
movl PCB_FPCPU(%esi),%ebx |
Line 1949 switch_restored: |
|
Line 1983 switch_restored: |
|
*/ |
*/ |
movl CPUVAR(CURLWP),%edi |
movl CPUVAR(CURLWP),%edi |
movl L_PROC(%edi),%esi |
movl L_PROC(%edi),%esi |
cmpl $0,P_NRAS(%esi) |
cmpl $0,P_RASLIST(%esi) |
je 1f |
jne 2f |
movl L_MD_REGS(%edi),%ebx |
|
movl TF_EIP(%ebx),%eax |
|
pushl %eax |
|
pushl %esi |
|
call _C_LABEL(ras_lookup) |
|
addl $8,%esp |
|
cmpl $-1,%eax |
|
je 1f |
|
movl %eax,TF_EIP(%ebx) |
|
1: |
1: |
xor %ebx,%ebx |
movl $1,%ebx |
|
|
switch_return: |
switch_return: |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
#if defined(MULTIPROCESSOR) || defined(LOCKDEBUG) |
|
|
popl %ebx |
popl %ebx |
ret |
ret |
|
|
|
2: # check RAS list |
|
movl L_MD_REGS(%edi),%ebx |
|
movl TF_EIP(%ebx),%eax |
|
pushl %eax |
|
pushl %esi |
|
call _C_LABEL(ras_lookup) |
|
addl $8,%esp |
|
cmpl $-1,%eax |
|
je 1b |
|
movl %eax,TF_EIP(%ebx) |
|
jmp 1b |
|
|
/* |
/* |
* void cpu_switchto(struct lwp *current, struct lwp *next) |
* void cpu_switchto(struct lwp *current, struct lwp *next) |
* Switch to the specified next LWP. |
* Switch to the specified next LWP. |
Line 2023 ENTRY(cpu_switchto) |
|
Line 2060 ENTRY(cpu_switchto) |
|
jmp switch_resume |
jmp switch_resume |
|
|
/* |
/* |
* void switch_exit(struct lwp *l, void (*exit)(struct lwp *)); |
* 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. |
*/ |
*/ |
Line 2033 ENTRY(cpu_switchto) |
|
Line 2070 ENTRY(cpu_switchto) |
|
#endif |
#endif |
.globl _C_LABEL(uvmspace_free),_C_LABEL(kernel_map) |
.globl _C_LABEL(uvmspace_free),_C_LABEL(kernel_map) |
.globl _C_LABEL(uvm_km_free),_C_LABEL(tss_free) |
.globl _C_LABEL(uvm_km_free),_C_LABEL(tss_free) |
/* LINTSTUB: Func: void switch_exit(struct lwp *l, void (*exit)(struct lwp *)) */ |
/* LINTSTUB: Func: void cpu_exit(struct lwp *l) */ |
ENTRY(switch_exit) |
ENTRY(cpu_exit) |
movl 4(%esp),%edi # old process |
movl 4(%esp),%edi # old process |
movl 8(%esp),%eax # exit func |
|
#ifndef MULTIPROCESSOR |
#ifndef MULTIPROCESSOR |
movl $_C_LABEL(lwp0),%ebx |
movl $_C_LABEL(lwp0),%ebx |
movl L_ADDR(%ebx),%esi |
movl L_ADDR(%ebx),%esi |
Line 2055 ENTRY(switch_exit) |
|
Line 2091 ENTRY(switch_exit) |
|
movl PCB_ESP(%esi),%esp |
movl PCB_ESP(%esi),%esp |
movl PCB_EBP(%esi),%ebp |
movl PCB_EBP(%esi),%ebp |
|
|
/* Save exit func. */ |
/* Switch TSS. Reset "task busy" flag before loading. */ |
pushl %eax |
movl %cr3,%eax |
|
movl %eax,PCB_CR3(%esi) |
/* Load TSS info. */ |
|
#ifdef MULTIPROCESSOR |
#ifdef MULTIPROCESSOR |
movl CPUVAR(GDT),%eax |
movl CPUVAR(GDT),%eax |
#else |
#else |
Line 2066 ENTRY(switch_exit) |
|
Line 2101 ENTRY(switch_exit) |
|
movl _C_LABEL(gdt),%eax |
movl _C_LABEL(gdt),%eax |
#endif |
#endif |
|
|
/* Switch address space. */ |
|
movl PCB_CR3(%esi),%ecx |
|
movl %ecx,%cr3 |
|
|
|
/* Switch TSS. */ |
|
andl $~0x0200,4-SEL_KPL(%eax,%edx,1) |
andl $~0x0200,4-SEL_KPL(%eax,%edx,1) |
ltr %dx |
ltr %dx |
|
|
Line 2087 ENTRY(switch_exit) |
|
Line 2117 ENTRY(switch_exit) |
|
sti |
sti |
|
|
/* |
/* |
* Schedule the dead process's vmspace and stack to be freed. |
* Schedule the dead LWP's stack to be freed. |
*/ |
*/ |
movl 0(%esp),%eax /* %eax = exit func */ |
pushl %edi |
movl %edi,0(%esp) /* {lwp_}exit2(l) */ |
call _C_LABEL(lwp_exit2) |
call *%eax |
|
addl $4,%esp |
addl $4,%esp |
|
|
/* Jump into cpu_switch() with the right state. */ |
/* Jump into cpu_switch() with the right state. */ |
|
|
INTRENTRY |
INTRENTRY |
|
|
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
|
cmpl $0, CPUVAR(WANT_PMAPLOAD) |
|
jz 1f |
|
pushl $6f |
|
call _C_LABEL(printf) |
|
addl $4, %esp |
|
1: |
movl CPUVAR(ILEVEL),%ebx |
movl CPUVAR(ILEVEL),%ebx |
testl %ebx,%ebx |
testl %ebx,%ebx |
jz 1f |
jz 1f |
|
|
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 |
movl L_PROC(%edx),%edx |
movl L_PROC(%edx),%edx |
|
pushl %esp |
call *P_MD_SYSCALL(%edx) # get pointer to syscall() function |
call *P_MD_SYSCALL(%edx) # get pointer to syscall() function |
2: /* Check for ASTs on exit to user mode. */ |
addl $4,%esp |
|
syscall_checkast: |
|
/* Check for ASTs on exit to user mode. */ |
cli |
cli |
CHECK_ASTPENDING(%eax) |
CHECK_ASTPENDING(%eax) |
je 1f |
je 1f |
|
|
CLEAR_ASTPENDING(%eax) |
CLEAR_ASTPENDING(%eax) |
sti |
sti |
/* Pushed T_ASTFLT into tf_trapno on entry. */ |
/* Pushed T_ASTFLT into tf_trapno on entry. */ |
|
pushl %esp |
call _C_LABEL(trap) |
call _C_LABEL(trap) |
jmp 2b |
addl $4,%esp |
|
jmp syscall_checkast /* re-check ASTs */ |
|
1: CHECK_DEFERRED_SWITCH(%eax) |
|
jnz 9f |
#ifndef DIAGNOSTIC |
#ifndef DIAGNOSTIC |
1: INTRFASTEXIT |
INTRFASTEXIT |
#else /* DIAGNOSTIC */ |
#else /* DIAGNOSTIC */ |
1: cmpl $IPL_NONE,CPUVAR(ILEVEL) |
cmpl $IPL_NONE,CPUVAR(ILEVEL) |
jne 3f |
jne 3f |
INTRFASTEXIT |
INTRFASTEXIT |
3: sti |
3: sti |
|
|
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" |
#endif /* DIAGNOSTIC */ |
#endif /* DIAGNOSTIC */ |
|
9: sti |
|
call _C_LABEL(pmap_load) |
|
jmp syscall_checkast /* re-check ASTs */ |
|
|
#if NNPX > 0 |
#if NNPX > 0 |
/* |
/* |