version 1.95.10.1, 2012/03/05 20:18:01 |
version 1.107, 2013/10/23 20:18:50 |
Line 163 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 163 __KERNEL_RCSID(0, "$NetBSD$"); |
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/* Get definitions for IOM_BEGIN, IOM_END, and IOM_SIZE */ |
/* Get definitions for IOM_BEGIN, IOM_END, and IOM_SIZE */ |
#include <dev/isa/isareg.h> |
#include <dev/isa/isareg.h> |
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#ifndef XEN |
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#define _RELOC(x) ((x) - KERNBASE) |
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#else |
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#define _RELOC(x) ((x)) |
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#endif /* XEN */ |
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#define RELOC(x) _RELOC(_C_LABEL(x)) |
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#ifdef XEN |
#ifdef XEN |
/* |
/* |
* Xen guest identifier and loader selection |
* Xen guest identifier and loader selection |
*/ |
*/ |
.section __xen_guest |
.section __xen_guest |
.ascii "GUEST_OS=netbsd,GUEST_VER=3.0,XEN_VER=xen-3.0" |
.ascii "GUEST_OS=netbsd,GUEST_VER=3.0,XEN_VER=xen-3.0" |
#if defined(DOM0OPS) || !defined(XEN_COMPAT_030001) |
.ascii ",VIRT_BASE=0xc0000000" /* KERNBASE */ |
.ascii ",VIRT_BASE=0xc0000000" /* KERNBASE */ |
.ascii ",ELF_PADDR_OFFSET=0xc0000000" /* KERNBASE */ |
.ascii ",ELF_PADDR_OFFSET=0xc0000000" /* KERNBASE */ |
.ascii ",VIRT_ENTRY=0xc0100000" /* KERNTEXTOFF */ |
#else |
.ascii ",HYPERCALL_PAGE=0x00000101" |
.ascii ",VIRT_BASE=0xc0100000" /* KERNTEXTOFF */ |
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.ascii ",ELF_PADDR_OFFSET=0xc0100000" /* KERNTEXTOFF */ |
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#endif |
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.ascii ",VIRT_ENTRY=0xc0100000" /* KERNTEXTOFF */ |
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#if !defined(XEN_COMPAT_030001) |
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.ascii ",HYPERCALL_PAGE=0x00000101" |
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/* (???+HYPERCALL_PAGE_OFFSET)/PAGE_SIZE) */ |
/* (???+HYPERCALL_PAGE_OFFSET)/PAGE_SIZE) */ |
#endif |
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#ifdef PAE |
#ifdef PAE |
.ascii ",PAE=yes[extended-cr3]" |
.ascii ",PAE=yes[extended-cr3]" |
#endif |
#endif |
.ascii ",LOADER=generic" |
.ascii ",LOADER=generic" |
#if (NKSYMS || defined(DDB) || defined(MODULAR)) && !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 |
#endif |
#endif /* XEN */ |
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/* |
/* |
* Initialization |
* Initialization |
*/ |
*/ |
.data |
.data |
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.globl _C_LABEL(cpu) |
.globl _C_LABEL(cputype) |
.globl _C_LABEL(cpuid_level) |
.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) |
.globl _C_LABEL(lwp0uarea),_C_LABEL(PDPpaddr) |
.globl _C_LABEL(lwp0uarea) |
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.globl _C_LABEL(PDPpaddr) |
.globl _C_LABEL(gdt) |
.globl _C_LABEL(gdt) |
.globl _C_LABEL(idt) |
.globl _C_LABEL(idt) |
.globl _C_LABEL(lapic_tpr) |
.globl _C_LABEL(lapic_tpr) |
Line 213 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 214 __KERNEL_RCSID(0, "$NetBSD$"); |
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.align 12 |
.align 12 |
#endif |
#endif |
.globl _C_LABEL(local_apic), _C_LABEL(lapic_id) |
.globl _C_LABEL(local_apic), _C_LABEL(lapic_id) |
_C_LABEL(local_apic): |
.type _C_LABEL(local_apic), @object |
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LABEL(local_apic) |
.space LAPIC_ID |
.space LAPIC_ID |
_C_LABEL(lapic_id): |
END(local_apic) |
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.type _C_LABEL(lapic_id), @object |
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LABEL(lapic_id) |
.long 0x00000000 |
.long 0x00000000 |
.space LAPIC_TPRI-(LAPIC_ID+4) |
.space LAPIC_TPRI-(LAPIC_ID+4) |
_C_LABEL(lapic_tpr): |
END(lapic_id) |
.space LAPIC_PPRI-LAPIC_TPRI |
.type _C_LABEL(lapic_tpr), @object |
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LABEL(lapic_tpr) |
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.space LAPIC_PPRI-LAPIC_TPRI |
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END(lapic_tpr) |
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.type _C_LABEL(lapic_ppr), @object |
_C_LABEL(lapic_ppr): |
_C_LABEL(lapic_ppr): |
.space LAPIC_ISR-LAPIC_PPRI |
.space LAPIC_ISR-LAPIC_PPRI |
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END(lapic_ppr) |
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.type _C_LABEL(lapic_isr), @object |
_C_LABEL(lapic_isr): |
_C_LABEL(lapic_isr): |
.space PAGE_SIZE-LAPIC_ISR |
.space PAGE_SIZE-LAPIC_ISR |
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END(lapic_isr) |
#else |
#else |
_C_LABEL(lapic_tpr): |
.type _C_LABEL(lapic_tpr), @object |
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LABEL(lapic_tpr) |
.long 0 |
.long 0 |
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END(lapic_tpr) |
#endif |
#endif |
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.type _C_LABEL(cputype), @object |
_C_LABEL(cpu): .long 0 # are we 80486, Pentium, or.. |
LABEL(cputype) .long 0 # are we 80486, Pentium, or.. |
_C_LABEL(cpuid_level): .long 0 |
END(cputype) |
_C_LABEL(atdevbase): .long 0 # location of start of iomem in virtual |
.type _C_LABEL(cpuid_level), @object |
_C_LABEL(lwp0uarea): .long 0 |
LABEL(cpuid_level) .long 0 |
_C_LABEL(PDPpaddr): .long 0 # paddr of PDP, for libkvm |
END(cpuid_level) |
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.type _C_LABEL(atdevbase), @object |
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LABEL(atdevbase) .long 0 # location of start of iomem in virtual |
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END(atdevbase) |
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.type _C_LABEL(lwp0uarea), @object |
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LABEL(lwp0uarea) .long 0 |
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END(lwp0uarea) |
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.type _C_LABEL(PDPpaddr), @object |
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LABEL(PDPpaddr) .long 0 # paddr of PDP, for libkvm |
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END(PDPpaddr) |
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.type _C_LABEL(tablesize), @object |
_C_LABEL(tablesize): .long 0 |
_C_LABEL(tablesize): .long 0 |
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END(tablesize) |
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.size tmpstk, tmpstk - . |
.space 512 |
.space 512 |
tmpstk: |
tmpstk: |
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#ifdef XEN |
#ifndef XEN |
.align PAGE_SIZE, 0x0 # Align on page boundary |
#define _RELOC(x) ((x) - KERNBASE) |
LABEL(tmpgdt) |
#else |
.space PAGE_SIZE # Xen expects a page |
#define _RELOC(x) ((x)) |
END(tmpgdt) |
#endif /* XEN */ |
#endif /* XEN */ |
#define RELOC(x) _RELOC(_C_LABEL(x)) |
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.text |
.text |
.globl _C_LABEL(kernel_text) |
.globl _C_LABEL(kernel_text) |
.set _C_LABEL(kernel_text),KERNTEXTOFF |
.set _C_LABEL(kernel_text),KERNTEXTOFF |
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.globl start |
ENTRY(start) |
#ifndef XEN |
#ifndef XEN |
start: movw $0x1234,0x472 # warm boot |
movw $0x1234,0x472 # warm boot |
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#if defined(MULTIBOOT) |
#if defined(MULTIBOOT) |
jmp 1f |
jmp 1f |
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* Don't try cpuid, as Nx586s reportedly don't support the |
* Don't try cpuid, as Nx586s reportedly don't support the |
* PSL_ID bit. |
* PSL_ID bit. |
*/ |
*/ |
movl $CPU_NX586,RELOC(cpu) |
movl $CPU_NX586,RELOC(cputype) |
jmp 2f |
jmp 2f |
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is386: |
is386: |
movl $CPU_386,RELOC(cpu) |
movl $CPU_386,RELOC(cputype) |
jmp 2f |
jmp 2f |
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try486: /* Try to toggle identification flag; does not exist on early 486s. */ |
try486: /* Try to toggle identification flag; does not exist on early 486s. */ |
Line 364 try486: /* Try to toggle identification |
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Line 386 try486: /* Try to toggle identification |
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testl %eax,%eax |
testl %eax,%eax |
jnz try586 |
jnz try586 |
is486: movl $CPU_486,RELOC(cpu) |
is486: movl $CPU_486,RELOC(cputype) |
/* |
/* |
* Check Cyrix CPU |
* Check Cyrix CPU |
* Cyrix CPUs do not change the undefined flags following |
* Cyrix CPUs do not change the undefined flags following |
Line 382 is486: movl $CPU_486,RELOC(cpu) |
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Line 404 is486: movl $CPU_486,RELOC(cpu) |
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popfl |
popfl |
jmp 2f |
jmp 2f |
trycyrix486: |
trycyrix486: |
movl $CPU_6x86,RELOC(cpu) # set CPU type |
movl $CPU_6x86,RELOC(cputype) # set CPU type |
/* |
/* |
* Check for Cyrix 486 CPU by seeing if the flags change during a |
* Check for Cyrix 486 CPU by seeing if the flags change during a |
* divide. This is documented in the Cx486SLC/e SMM Programmer's |
* divide. This is documented in the Cx486SLC/e SMM Programmer's |
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xorl %ecx,%eax # are the flags different? |
xorl %ecx,%eax # are the flags different? |
testl $0x8d5,%eax # only check C|PF|AF|Z|N|V |
testl $0x8d5,%eax # only check C|PF|AF|Z|N|V |
jne 2f # yes; must be Cyrix 6x86 CPU |
jne 2f # yes; must be Cyrix 6x86 CPU |
movl $CPU_486DLC,RELOC(cpu) # set CPU type |
movl $CPU_486DLC,RELOC(cputype) # set CPU type |
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#ifndef CYRIX_CACHE_WORKS |
#ifndef CYRIX_CACHE_WORKS |
/* Disable caching of the ISA hole only. */ |
/* Disable caching of the ISA hole only. */ |
Line 507 try586: /* Use the `cpuid' instruction. |
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Line 529 try586: /* Use the `cpuid' instruction. |
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* eax = pte (page frame | control | status) |
* eax = pte (page frame | control | status) |
* ebx = page table address |
* ebx = page table address |
* ecx = number of pages to map |
* ecx = number of pages to map |
* |
* |
* For PAE, each entry is 8 bytes long: we must set the 4 upper bytes to 0. |
* For PAE, each entry is 8 bytes long: we must set the 4 upper bytes to 0. |
* This is done by the first instruction of fillkpt. In the non-PAE case, this |
* This is done by the first instruction of fillkpt. In the non-PAE case, this |
* instruction just clears the page table entry. |
* instruction just clears the page table entry. |
Line 515 try586: /* Use the `cpuid' instruction. |
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Line 537 try586: /* Use the `cpuid' instruction. |
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#define fillkpt \ |
#define fillkpt \ |
1: movl $0,(PDE_SIZE-4)(%ebx) ; /* clear bits */ \ |
1: movl $0,(PDE_SIZE-4)(%ebx) ; /* clear bits */ \ |
movl %eax,(%ebx) ; /* store phys addr */ \ |
movl %eax,(%ebx) ; /* store phys addr */ \ |
addl $PDE_SIZE,%ebx ; /* next pte/pde */ \ |
addl $PDE_SIZE,%ebx ; /* next pte/pde */ \ |
addl $PAGE_SIZE,%eax ; /* next phys page */ \ |
addl $PAGE_SIZE,%eax ; /* next phys page */ \ |
loop 1b ; |
loop 1b ; |
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/* Find end of kernel image. */ |
/* Find end of kernel image. */ |
Line 570 try586: /* Use the `cpuid' instruction. |
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Line 592 try586: /* Use the `cpuid' instruction. |
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cmpl %eax,RELOC(nkptp)+1*4 |
cmpl %eax,RELOC(nkptp)+1*4 |
jnz 1b |
jnz 1b |
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/* Clear tables */ |
/* Clear tables */ |
movl %esi,%edi |
movl %esi,%edi |
xorl %eax,%eax |
xorl %eax,%eax |
cld |
cld |
movl RELOC(tablesize),%ecx |
movl RELOC(tablesize),%ecx |
shrl $2,%ecx |
shrl $2,%ecx |
rep |
rep |
stosl |
stosl |
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leal (PROC0_PTP1_OFF)(%esi), %ebx |
leal (PROC0_PTP1_OFF)(%esi), %ebx |
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/* |
/* |
* Build initial page tables. |
* Build initial page tables. |
*/ |
*/ |
/* |
/* |
* Compute &__data_start - KERNBASE. This can't be > 4G, |
* Compute &__data_start - KERNBASE. This can't be > 4G, |
* or we can't deal with it anyway, since we can't load it in |
* or we can't deal with it anyway, since we can't load it in |
* 32 bit mode. So use the bottom 32 bits. |
* 32 bit mode. So use the bottom 32 bits. |
*/ |
*/ |
movl $RELOC(__data_start),%edx |
movl $RELOC(__data_start),%edx |
andl $~PGOFSET,%edx |
andl $~PGOFSET,%edx |
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/* |
/* |
* Skip the first MB. |
* Skip the first MB. |
*/ |
*/ |
movl $_RELOC(KERNTEXTOFF),%eax |
movl $_RELOC(KERNTEXTOFF),%eax |
movl %eax,%ecx |
movl %eax,%ecx |
shrl $(PGSHIFT-2),%ecx /* ((n >> PGSHIFT) << 2) for # pdes */ |
shrl $(PGSHIFT-2),%ecx /* ((n >> PGSHIFT) << 2) for # pdes */ |
#ifdef PAE |
#ifdef PAE |
shll $1,%ecx /* pdes are twice larger with PAE */ |
shll $1,%ecx /* pdes are twice larger with PAE */ |
#endif |
#endif |
addl %ecx,%ebx |
addl %ecx,%ebx |
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/* Map the kernel text read-only. */ |
/* Map the kernel text read-only. */ |
movl %edx,%ecx |
movl %edx,%ecx |
Line 626 try586: /* Use the `cpuid' instruction. |
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Line 648 try586: /* Use the `cpuid' instruction. |
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/* |
/* |
* Construct a page table directory. |
* Construct a page table directory. |
*/ |
*/ |
/* Set up top level entries for identity mapping */ |
/* Set up top level entries for identity mapping */ |
leal (PROC0_PDIR_OFF)(%esi),%ebx |
leal (PROC0_PDIR_OFF)(%esi),%ebx |
leal (PROC0_PTP1_OFF)(%esi),%eax |
leal (PROC0_PTP1_OFF)(%esi),%eax |
orl $(PG_V|PG_KW), %eax |
orl $(PG_V|PG_KW), %eax |
movl RELOC(nkptp)+1*4,%ecx |
movl RELOC(nkptp)+1*4,%ecx |
fillkpt |
fillkpt |
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/* Set up top level entries for actual kernel mapping */ |
/* Set up top level entries for actual kernel mapping */ |
leal (PROC0_PDIR_OFF + L2_SLOT_KERNBASE*PDE_SIZE)(%esi),%ebx |
leal (PROC0_PDIR_OFF + L2_SLOT_KERNBASE*PDE_SIZE)(%esi),%ebx |
leal (PROC0_PTP1_OFF)(%esi),%eax |
leal (PROC0_PTP1_OFF)(%esi),%eax |
orl $(PG_V|PG_KW), %eax |
orl $(PG_V|PG_KW), %eax |
movl RELOC(nkptp)+1*4,%ecx |
movl RELOC(nkptp)+1*4,%ecx |
fillkpt |
fillkpt |
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/* Install a PDE recursively mapping page directory as a page table! */ |
/* Install a PDE recursively mapping page directory as a page table! */ |
leal (PROC0_PDIR_OFF + PDIR_SLOT_PTE*PDE_SIZE)(%esi),%ebx |
leal (PROC0_PDIR_OFF + PDIR_SLOT_PTE*PDE_SIZE)(%esi),%ebx |
leal (PROC0_PDIR_OFF)(%esi),%eax |
leal (PROC0_PDIR_OFF)(%esi),%eax |
orl $(PG_V|PG_KW),%eax |
orl $(PG_V|PG_KW),%eax |
movl $PDP_SIZE,%ecx |
movl $PDP_SIZE,%ecx |
fillkpt |
fillkpt |
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Line 672 try586: /* Use the `cpuid' instruction. |
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Line 694 try586: /* Use the `cpuid' instruction. |
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movl %esi,%eax # phys address of ptd in proc 0 |
movl %esi,%eax # phys address of ptd in proc 0 |
movl %eax,%cr3 # load ptd addr into mmu |
movl %eax,%cr3 # load ptd addr into mmu |
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/* |
/* |
* 2. Enable paging and the rest of it. |
* 2. Enable paging and the rest of it. |
*/ |
*/ |
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|CR0_WP|CR0_AM),%eax |
movl %eax,%cr0 # and 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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begin: |
begin: |
/* |
/* |
* We have arrived. |
* We have arrived. |
* There's no need anymore for the identity mapping in low |
* There's no need anymore for the identity mapping in low |
* memory, remove it. |
* memory, remove it. |
*/ |
*/ |
movl _C_LABEL(nkptp)+1*4,%ecx |
movl _C_LABEL(nkptp)+1*4,%ecx |
leal (PROC0_PDIR_OFF)(%esi),%ebx # old, phys address of PDIR |
leal (PROC0_PDIR_OFF)(%esi),%ebx # old, phys address of PDIR |
addl $(KERNBASE), %ebx # new, virtual address of PDIR |
addl $(KERNBASE), %ebx # new, virtual address of PDIR |
1: movl $0,(PDE_SIZE-4)(%ebx) # Upper bits (for PAE) |
1: movl $0,(PDE_SIZE-4)(%ebx) # Upper bits (for PAE) |
movl $0,(%ebx) |
movl $0,(%ebx) |
addl $PDE_SIZE,%ebx |
addl $PDE_SIZE,%ebx |
loop 1b |
loop 1b |
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/* Relocate atdevbase. */ |
/* Relocate atdevbase. */ |
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movl %edx,_C_LABEL(atdevbase) |
movl %edx,_C_LABEL(atdevbase) |
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/* Set up bootstrap stack. */ |
/* Set up bootstrap stack. */ |
leal (PROC0_STK_OFF+KERNBASE)(%esi),%eax |
leal (PROC0_STK_OFF+KERNBASE)(%esi),%eax |
movl %eax,_C_LABEL(lwp0uarea) |
movl %eax,_C_LABEL(lwp0uarea) |
leal (KSTACK_SIZE-FRAMESIZE)(%eax),%esp |
leal (KSTACK_SIZE-FRAMESIZE)(%eax),%esp |
movl %esi,(KSTACK_SIZE+PCB_CR3)(%eax) # pcb->pcb_cr3 |
movl %esi,(KSTACK_SIZE+PCB_CR3)(%eax) # pcb->pcb_cr3 |
xorl %ebp,%ebp # mark end of frames |
xorl %ebp,%ebp # mark end of frames |
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#if defined(MULTIBOOT) |
#if defined(MULTIBOOT) |
/* It is now safe to parse the Multiboot information structure |
/* It is now safe to parse the Multiboot information structure |
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call _C_LABEL(initgdt) |
call _C_LABEL(initgdt) |
addl $4,%esp |
addl $4,%esp |
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movl _C_LABEL(tablesize),%eax |
movl _C_LABEL(tablesize),%eax |
addl %esi,%eax # skip past stack and page tables |
addl %esi,%eax # skip past stack and page tables |
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#ifdef PAE |
#ifdef PAE |
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call _C_LABEL(main) |
call _C_LABEL(main) |
#else /* XEN */ |
#else /* XEN */ |
start: |
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/* First, reset the PSL. */ |
/* First, reset the PSL. */ |
pushl $PSL_MBO |
pushl $PSL_MBO |
popfl |
popfl |
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movl %esp, %ebx # save start of available space |
movl %esp, %ebx # save start of available space |
movl $_RELOC(tmpstk),%esp # bootstrap stack end location |
movl $_RELOC(tmpstk),%esp # bootstrap stack end location |
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/* Clear BSS first so that there are no surprises... */ |
/* Clear BSS. */ |
xorl %eax,%eax |
xorl %eax,%eax |
movl $RELOC(__bss_start),%edi |
movl $RELOC(__bss_start),%edi |
movl $RELOC(_end),%ecx |
movl $RELOC(_end),%ecx |
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rep stosb |
rep stosb |
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/* Copy the necessary stuff from start_info structure. */ |
/* Copy the necessary stuff from start_info structure. */ |
/* We need to copy shared_info early, so that sti/cli work */ |
/* We need to copy shared_info early, so that sti/cli work */ |
movl $RELOC(start_info_union),%edi |
movl $RELOC(start_info_union),%edi |
movl $128,%ecx |
movl $128,%ecx |
rep movsl |
rep movsl |
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cpuid |
cpuid |
movl %eax,RELOC(cpuid_level) |
movl %eax,RELOC(cpuid_level) |
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/* |
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* Use a temp page. We'll re- add it to uvm(9) once we're |
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* done using it. |
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*/ |
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movl $RELOC(tmpgdt), %eax |
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pushl %eax # start of temporary gdt |
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call _C_LABEL(initgdt) |
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addl $4,%esp |
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call xen_pmap_bootstrap |
call xen_pmap_bootstrap |
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/* |
/* |
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/* Set up bootstrap stack. */ |
/* Set up bootstrap stack. */ |
leal (KSTACK_SIZE-FRAMESIZE)(%eax),%esp |
leal (KSTACK_SIZE-FRAMESIZE)(%eax),%esp |
xorl %ebp,%ebp # mark end of frames |
xorl %ebp,%ebp # mark end of frames |
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addl $USPACE, %esi |
addl $USPACE, %esi |
subl $KERNBASE, %esi #init386 want a physical address |
subl $KERNBASE, %esi #init386 want a physical address |
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call _C_LABEL(init386) # wire 386 chip for unix operation |
call _C_LABEL(init386) # wire 386 chip for unix operation |
addl $PDE_SIZE,%esp # pop paddr_t |
addl $PDE_SIZE,%esp # pop paddr_t |
call _C_LABEL(main) |
call _C_LABEL(main) |
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#endif /* XEN */ |
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END(start) |
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#if defined(XEN) && !defined(XEN_COMPAT_030001) |
#if defined(XEN) |
/* space for the hypercall call page */ |
/* space for the hypercall call page */ |
#define HYPERCALL_PAGE_OFFSET 0x1000 |
#define HYPERCALL_PAGE_OFFSET 0x1000 |
.org HYPERCALL_PAGE_OFFSET |
.org HYPERCALL_PAGE_OFFSET |
ENTRY(hypercall_page) |
ENTRY(hypercall_page) |
.skip 0x1000 |
.skip 0x1000 |
#endif /* defined(XEN) && !defined(XEN_COMPAT_030001) */ |
END(hypercall_page) |
|
|
/* |
/* |
* void lgdt_finish(void); |
* void lgdt_finish(void); |
|
|
END(dumpsys) |
END(dumpsys) |
|
|
/* |
/* |
* struct lwp *cpu_switchto(struct lwp *oldlwp, struct *newlwp, |
* struct lwp *cpu_switchto(struct lwp *oldlwp, struct lwp *newlwp, |
* bool returning) |
* bool returning) |
* |
* |
* 1. if (oldlwp != NULL), save its context. |
* 1. if (oldlwp != NULL), save its context. |
Line 1045 ENTRY(cpu_switchto) |
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Line 1077 ENTRY(cpu_switchto) |
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call _C_LABEL(i386_tls_switch) |
call _C_LABEL(i386_tls_switch) |
addl $4,%esp |
addl $4,%esp |
#else /* !XEN */ |
#else /* !XEN */ |
movl $IPL_HIGH,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, |
|
* set CR0_TS so we'll trap rather than reuse bogus state. |
|
*/ |
|
cmpl CPUVAR(FPCURLWP),%edi |
|
je 3f |
|
orl $CR0_TS,%ecx |
|
|
|
/* Reloading CR0 is very expensive - avoid if possible. */ |
/* Reloading CR0 is very expensive - avoid if possible. */ |
3: cmpl %edx,%ecx |
cmpl %edx,%ecx |
je 4f |
je 4f |
movl %ecx,%cr0 |
movl %ecx,%cr0 |
#endif /* !XEN */ |
#endif /* !XEN */ |
Line 1123 IDTVEC(osyscall) |
|
Line 1146 IDTVEC(osyscall) |
|
#endif |
#endif |
pushfl # set eflags in trap frame |
pushfl # set eflags in trap frame |
popl 8(%esp) |
popl 8(%esp) |
orl $PSL_I,(%esp) # re-enable ints on return to user |
orl $PSL_I,8(%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 |
IDTVEC_END(osyscall) |
IDTVEC_END(osyscall) |
|
|
.Lsyscall_resume: |
.Lsyscall_resume: |
movl %ebx,%eax # get cpl |
movl %ebx,%eax # get cpl |
movl CPUVAR(IUNMASK)(,%eax,4),%eax |
movl CPUVAR(IUNMASK)(,%eax,4),%eax |
andl CPUVAR(IPENDING),%eax # any non-masked bits left? |
andl CPUVAR(IPENDING),%eax # any non-masked bits left? |
jz 17f |
jz 17f |
bsrl %eax,%eax |
bsrl %eax,%eax |
btrl %eax,CPUVAR(IPENDING) |
btrl %eax,CPUVAR(IPENDING) |
movl CPUVAR(ISOURCES)(,%eax,4),%eax |
movl CPUVAR(ISOURCES)(,%eax,4),%eax |
jmp *IS_RESUME(%eax) |
jmp *IS_RESUME(%eax) |
17: movl %ebx, CPUVAR(ILEVEL) #restore cpl |
17: movl %ebx, CPUVAR(ILEVEL) #restore cpl |
jmp .Lsyscall_checkast |
jmp .Lsyscall_checkast |
14: |
14: |
#endif /* XEN */ |
#endif /* XEN */ |