version 1.48, 2007/05/17 14:51:21 |
version 1.58, 2007/12/03 19:06:36 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
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/* |
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* Copyright-o-rama! |
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*/ |
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/* |
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* Copyright (c) 2001 Wasabi Systems, Inc. |
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* All rights reserved. |
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* |
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* Written by Frank van der Linden for Wasabi Systems, Inc. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed for the NetBSD Project by |
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* Wasabi Systems, Inc. |
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse |
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* or promote products derived from this software without specific prior |
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* written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/*- |
/*- |
* Copyright (c) 1998, 2000, 2004, 2006, 2007 The NetBSD Foundation, Inc. |
* Copyright (c) 1998, 2000, 2004, 2006, 2007 The NetBSD Foundation, Inc. |
* All rights reserved. |
* All rights reserved. |
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*/ |
*/ |
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#include "opt_compat_oldboot.h" |
#include "opt_compat_oldboot.h" |
#include "opt_cputype.h" |
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#include "opt_ddb.h" |
#include "opt_ddb.h" |
#include "opt_realmem.h" |
#include "opt_realmem.h" |
#include "opt_vm86.h" |
#include "opt_vm86.h" |
Line 139 _C_LABEL(cpu): .long 0 # are we 80486, |
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Line 178 _C_LABEL(cpu): .long 0 # are we 80486, |
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_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 |
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_C_LABEL(tablesize): .long 0 |
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.space 512 |
.space 512 |
tmpstk: |
tmpstk: |
Line 384 try586: /* Use the `cpuid' instruction. |
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Line 424 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 | L1 ptp |
* 0 1 2 3 |
* 0 1 2 3 |
*/ |
*/ |
#define PROC0PDIR ((0) * PAGE_SIZE) |
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#define PROC0STACK ((1) * PAGE_SIZE) |
#define PROC0_PDIR_OFF 0 |
#define SYSMAP ((1+UPAGES) * PAGE_SIZE) |
#define PROC0_STK_OFF (PROC0_PDIR_OFF + PAGE_SIZE) |
#define TABLESIZE ((1+UPAGES) * PAGE_SIZE) /* + nkpde * PAGE_SIZE */ |
#define PROC0_PTP1_OFF (PROC0_STK_OFF + UPAGES * PAGE_SIZE) |
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/* |
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* fillkpt |
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* eax = pte (page frame | control | status) |
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* ebx = page table address |
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* ecx = number of pages to map |
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*/ |
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#define fillkpt \ |
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1: movl %eax,(%ebx) ; /* store phys addr */ \ |
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addl $4,%ebx ; /* next pte/pde */ \ |
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addl $PAGE_SIZE,%eax ; /* next phys page */ \ |
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loop 1b ; \ |
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/* Find end of kernel image. */ |
/* Find end of kernel image. */ |
movl $RELOC(end),%edi |
movl $RELOC(end),%edi |
Line 404 try586: /* Use the `cpuid' instruction. |
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Line 458 try586: /* Use the `cpuid' instruction. |
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1: |
1: |
#endif |
#endif |
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/* Calculate where to start the bootstrap tables. */ |
/* Compute sizes */ |
movl %edi,%esi # edi = esym ? esym : end |
movl %edi,%esi # edi = esym ? esym : end |
addl $PGOFSET,%esi # page align up |
addl $PGOFSET,%esi # page align up |
andl $~PGOFSET,%esi |
andl $~PGOFSET,%esi |
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/* |
/* nkptp[1] = (esi + ~L2_FRAME) >> L2_SHIFT + 1; */ |
* Calculate the size of the kernel page table directory, and |
movl %esi,%eax |
* how many entries it will have. Adjust nkpde to the actual |
addl $~L2_FRAME,%eax |
* kernel size automatically. Account for the bootstrap tables, |
shrl $L2_SHIFT,%eax |
* round up, and add an extra 4MB. |
incl %eax /* one more ptp for VAs stolen by bootstrap */ |
*/ |
1: movl %eax,RELOC(nkptp)+1*4 |
leal TABLESIZE+NBPD+PDOFSET(%edi),%eax |
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shrl $PDSHIFT,%eax |
/* tablesize = (1 + UPAGES + nkptp) << PGSHIFT; */ |
movl RELOC(nkpde),%ecx # get nkpde |
addl $(1+UPAGES),%eax |
cmpl %ecx,%eax |
shll $PGSHIFT,%eax |
jb 1f |
movl %eax,RELOC(tablesize) |
movl %eax,%ecx |
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1: cmpl $NKPTP_MIN,%ecx # larger than min? |
/* ensure that nkptp covers bootstrap tables */ |
jge 1f |
addl %esi,%eax |
movl $NKPTP_MIN,%ecx # set at min |
addl $~L2_FRAME,%eax |
jmp 2f |
shrl $L2_SHIFT,%eax |
1: cmpl $NKPTP_MAX,%ecx # larger than max? |
incl %eax |
jle 2f |
cmpl %eax,RELOC(nkptp)+1*4 |
movl $NKPTP_MAX,%ecx |
jnz 1b |
2: movl %ecx,RELOC(nkpde) |
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/* Clear tables */ |
/* Clear memory for bootstrap tables. */ |
movl %esi,%edi |
shll $PGSHIFT,%ecx |
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addl $TABLESIZE,%ecx |
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addl %esi,%ecx # end of tables |
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subl %edi,%ecx # size of tables |
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shrl $2,%ecx |
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xorl %eax,%eax |
xorl %eax,%eax |
cld |
cld |
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movl RELOC(tablesize),%ecx |
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shrl $2,%ecx |
rep |
rep |
stosl |
stosl |
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/* |
leal (PROC0_PTP1_OFF)(%esi), %ebx |
* fillkpt |
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* eax = pte (page frame | control | status) |
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* ebx = page table address |
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* ecx = number of pages to map |
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*/ |
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#define fillkpt \ |
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1: movl %eax,(%ebx) ; \ |
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addl $PAGE_SIZE,%eax ; /* increment physical address */ \ |
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addl $4,%ebx ; /* next pte */ \ |
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loop 1b ; |
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/* |
/* |
* Build initial page tables. |
* Build initial page tables. |
*/ |
*/ |
/* Calculate end of text segment, rounded to a page. */ |
/* |
leal (RELOC(etext)+PGOFSET),%edx |
* Compute &__data_start - KERNBASE. This can't be > 4G, |
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* or we can't deal with it anyway, since we can't load it in |
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* 32 bit mode. So use the bottom 32 bits. |
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*/ |
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movl $RELOC(__data_start),%edx |
andl $~PGOFSET,%edx |
andl $~PGOFSET,%edx |
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/* Skip over the first 1MB. */ |
/* |
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* Skip the first MB. |
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*/ |
movl $_RELOC(KERNTEXTOFF),%eax |
movl $_RELOC(KERNTEXTOFF),%eax |
movl %eax,%ecx |
movl %eax,%ecx |
shrl $PGSHIFT,%ecx |
shrl $(PGSHIFT-2),%ecx /* ((n >> PGSHIFT) << 2) for # pdes */ |
leal (SYSMAP)(%esi,%ecx,4),%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 475 try586: /* Use the `cpuid' instruction. |
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Line 522 try586: /* Use the `cpuid' instruction. |
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/* Map the data, BSS, and bootstrap tables read-write. */ |
/* Map the data, BSS, and bootstrap tables read-write. */ |
leal (PG_V|PG_KW)(%edx),%eax |
leal (PG_V|PG_KW)(%edx),%eax |
movl RELOC(nkpde),%ecx |
movl RELOC(tablesize),%ecx |
shll $PGSHIFT,%ecx |
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addl $TABLESIZE,%ecx |
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addl %esi,%ecx # end of tables |
addl %esi,%ecx # end of tables |
subl %edx,%ecx # subtract end of text |
subl %edx,%ecx # subtract end of text |
shrl $PGSHIFT,%ecx |
shrl $PGSHIFT,%ecx |
fillkpt |
fillkpt |
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/* Map ISA I/O memory. */ |
/* Map ISA I/O mem (later atdevbase) */ |
movl $(IOM_BEGIN|PG_V|PG_KW/*|PG_N*/),%eax # having these bits set |
movl $(IOM_BEGIN|PG_V|PG_KW/*|PG_N*/),%eax # having these bits set |
movl $(IOM_SIZE>>PGSHIFT),%ecx # for this many pte s, |
movl $(IOM_SIZE>>PGSHIFT),%ecx # for this many pte s, |
fillkpt |
fillkpt |
Line 491 try586: /* Use the `cpuid' instruction. |
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Line 536 try586: /* Use the `cpuid' instruction. |
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/* |
/* |
* Construct a page table directory. |
* Construct a page table directory. |
*/ |
*/ |
/* Install PDEs for temporary double map of kernel. */ |
/* Set up top level entries for identity mapping */ |
movl RELOC(nkpde),%ecx # for this many pde s, |
leal (PROC0_PDIR_OFF)(%esi),%ebx |
leal (PROC0PDIR+0*4)(%esi),%ebx # which is where temp maps! |
leal (PROC0_PTP1_OFF)(%esi),%eax |
leal (SYSMAP+PG_V|PG_KW)(%esi),%eax # pte for KPT in proc 0, |
orl $(PG_V|PG_KW), %eax |
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movl RELOC(nkptp)+1*4,%ecx |
fillkpt |
fillkpt |
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/* Map kernel PDEs. */ |
/* Set up top level entries for actual kernel mapping */ |
movl RELOC(nkpde),%ecx # for this many pde s, |
leal (PROC0_PDIR_OFF + L2_SLOT_KERNBASE*4)(%esi),%ebx |
leal (PROC0PDIR+PDSLOT_KERN*4)(%esi),%ebx # kernel pde offset |
leal (PROC0_PTP1_OFF)(%esi),%eax |
leal (SYSMAP+PG_V|PG_KW)(%esi),%eax # pte for KPT in proc 0, |
orl $(PG_V|PG_KW), %eax |
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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 (PROC0PDIR+PG_V|PG_KW)(%esi),%eax # pte for ptd |
leal (PROC0_PDIR_OFF + PDIR_SLOT_PTE*4)(%esi),%ebx |
movl %eax,(PROC0PDIR+PDSLOT_PTE*4)(%esi) # recursive PD slot |
leal (PROC0_PDIR_OFF)(%esi),%eax |
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orl $(PG_V|PG_KW),%eax |
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movl %eax,(%ebx) |
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/* Save phys. addr of PDP, for libkvm. */ |
/* Save phys. addr of PDP, for libkvm. */ |
movl %esi,RELOC(PDPpaddr) |
movl %esi,RELOC(PDPpaddr) |
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/* Load base of page directory and enable mapping. */ |
/* |
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* Startup checklist: |
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* 1. Load %cr3 with pointer to PDIR. |
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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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/* |
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* 2. Enable paging and the rest of it. |
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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 |
Line 522 try586: /* Use the `cpuid' instruction. |
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Line 579 try586: /* Use the `cpuid' instruction. |
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ret |
ret |
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begin: |
begin: |
/* Now running relocated at KERNBASE. Remove double mapping. */ |
/* |
movl _C_LABEL(nkpde),%ecx # for this many pde s, |
* We have arrived. |
leal (PROC0PDIR+0*4)(%esi),%ebx # which is where temp maps! |
* There's no need anymore for the identity mapping in low |
addl $(KERNBASE), %ebx # now use relocated address |
* memory, remove it. |
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*/ |
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movl _C_LABEL(nkptp)+1*4,%ecx |
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leal (PROC0_PDIR_OFF)(%esi),%ebx # old, phys address of PDIR |
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addl $(KERNBASE), %ebx # new, virtual address of PDIR |
1: movl $0,(%ebx) |
1: movl $0,(%ebx) |
addl $4,%ebx # next pde |
addl $4,%ebx |
loop 1b |
loop 1b |
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/* Relocate atdevbase. */ |
/* Relocate atdevbase. */ |
movl _C_LABEL(nkpde),%edx |
movl $KERNBASE,%edx |
shll $PGSHIFT,%edx |
addl _C_LABEL(tablesize),%edx |
addl $(TABLESIZE+KERNBASE),%edx |
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addl %esi,%edx |
addl %esi,%edx |
movl %edx,_C_LABEL(atdevbase) |
movl %edx,_C_LABEL(atdevbase) |
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/* Set up bootstrap stack. */ |
/* Set up bootstrap stack. */ |
leal (PROC0STACK+KERNBASE)(%esi),%eax |
leal (PROC0_STK_OFF+KERNBASE)(%esi),%eax |
movl %eax,_C_LABEL(proc0uarea) |
movl %eax,_C_LABEL(proc0uarea) |
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 |
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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(nkpde),%eax |
movl _C_LABEL(tablesize),%eax |
shll $PGSHIFT,%eax |
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addl $TABLESIZE,%eax |
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addl %esi,%eax # skip past stack and page tables |
addl %esi,%eax # skip past stack and page tables |
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pushl %eax |
pushl %eax |
Line 604 NENTRY(lwp_trampoline) |
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Line 662 NENTRY(lwp_trampoline) |
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pushl %ebx |
pushl %ebx |
call *%esi |
call *%esi |
addl $4,%esp |
addl $4,%esp |
DO_DEFERRED_SWITCH(%eax) |
DO_DEFERRED_SWITCH |
INTRFASTEXIT |
INTRFASTEXIT |
/* NOTREACHED */ |
/* NOTREACHED */ |
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_C_LABEL(esigcode): |
_C_LABEL(esigcode): |
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/* |
/* |
* void lgdt(struct region_descriptor *rdp); |
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* |
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* Load a new GDT pointer (and do any necessary cleanup). |
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* XXX It's somewhat questionable whether reloading all the segment registers |
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* is necessary, since the actual descriptor data is not changed except by |
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* process creation and exit, both of which clean up via task switches. OTOH, |
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* this only happens at run time when the GDT is resized. |
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*/ |
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NENTRY(lgdt) |
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/* Reload the descriptor table. */ |
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movl 4(%esp),%eax |
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lgdt (%eax) |
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/* Flush the prefetch queue. */ |
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jmp 1f |
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nop |
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1: /* Reload "stale" selectors. */ |
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movl $GSEL(GDATA_SEL, SEL_KPL),%eax |
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movw %ax,%ds |
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movw %ax,%es |
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movw %ax,%gs |
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movw %ax,%ss |
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movl $GSEL(GCPU_SEL, SEL_KPL),%eax |
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movw %ax,%fs |
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/* Reload code selector by doing intersegment return. */ |
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popl %eax |
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pushl $GSEL(GCODE_SEL, SEL_KPL) |
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pushl %eax |
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lret |
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/* |
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* void x86_flush() |
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* |
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* Flush instruction pipelines by doing an intersegment (far) return. |
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*/ |
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NENTRY(x86_flush) |
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popl %eax |
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pushl $GSEL(GCODE_SEL, SEL_KPL) |
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pushl %eax |
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lret |
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/* |
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* int setjmp(label_t *) |
* int setjmp(label_t *) |
* |
* |
* Used primarily by DDB. |
* Used primarily by DDB. |
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ret |
ret |
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/* |
/* |
* struct lwp *cpu_switchto(struct lwp *oldlwp, struct newlwp) |
* struct lwp *cpu_switchto(struct lwp *oldlwp, struct newlwp, |
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* bool returning) |
* |
* |
* 1. if (oldlwp != NULL), save its context. |
* 1. if (oldlwp != NULL), save its context. |
* 2. then, restore context of newlwp. |
* 2. then, restore context of newlwp. |
Line 721 ENTRY(cpu_switchto) |
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Line 739 ENTRY(cpu_switchto) |
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movl 16(%esp),%esi # oldlwp |
movl 16(%esp),%esi # oldlwp |
movl 20(%esp),%edi # newlwp |
movl 20(%esp),%edi # newlwp |
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movl 24(%esp),%edx # returning |
testl %esi,%esi |
testl %esi,%esi |
jz 1f |
jz 1f |
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Line 734 ENTRY(cpu_switchto) |
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Line 753 ENTRY(cpu_switchto) |
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movl PCB_EBP(%ebx),%ebp |
movl PCB_EBP(%ebx),%ebp |
movl PCB_ESP(%ebx),%esp |
movl PCB_ESP(%ebx),%esp |
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/* Set curlwp. */ |
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movl %edi,CPUVAR(CURLWP) |
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/* Skip the rest if returning to a pinned LWP. */ |
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testl %edx,%edx |
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jnz 4f |
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/* Switch TSS. Reset "task busy" flag before loading. */ |
/* Switch TSS. Reset "task busy" flag before loading. */ |
movl %cr3,%eax |
movl %cr3,%eax |
movl %eax,PCB_CR3(%ebx) # for TSS gates |
movl %eax,PCB_CR3(%ebx) # for TSS gates |
movl CPUVAR(GDT),%eax |
movl CPUVAR(GDT),%ecx |
movl L_MD_TSS_SEL(%edi),%edx |
movl L_MD_TSS_SEL(%edi),%edx |
andl $~0x0200,4(%eax,%edx, 1) |
andl $~0x0200,4(%ecx,%edx, 1) |
ltr %dx |
ltr %dx |
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/* Set curlwp. */ |
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movl %edi,CPUVAR(CURLWP) |
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/* Don't bother with the rest if switching to a system process. */ |
/* Don't bother with the rest if switching to a system process. */ |
testl $LW_SYSTEM,L_FLAG(%edi) |
testl $LW_SYSTEM,L_FLAG(%edi) |
jnz 4f |
jnz 4f |
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/* Restore thread-private %fs/%gs descriptors. */ |
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movl PCB_FSD(%ebx), %eax |
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movl PCB_FSD+4(%ebx), %edx |
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movl %eax, (GUFS_SEL*8)(%ecx) |
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movl %edx, (GUFS_SEL*8+4)(%ecx) |
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movl PCB_GSD(%ebx), %eax |
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movl PCB_GSD+4(%ebx), %edx |
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movl %eax, (GUGS_SEL*8)(%ecx) |
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movl %edx, (GUGS_SEL*8+4)(%ecx) |
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/* Is this process using RAS (restartable atomic sequences)? */ |
/* Is this process using RAS (restartable atomic sequences)? */ |
movl L_PROC(%edi),%eax |
movl L_PROC(%edi),%eax |
cmpl $0,P_RASLIST(%eax) |
cmpl $0,P_RASLIST(%eax) |
Line 792 ENTRY(cpu_switchto) |
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Line 825 ENTRY(cpu_switchto) |
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addl $8,%esp |
addl $8,%esp |
cmpl $-1,%eax |
cmpl $-1,%eax |
je 2b |
je 2b |
movl %eax,TF_EIP(%ebx) |
movl L_MD_REGS(%edi),%ecx |
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movl %eax,TF_EIP(%ecx) |
jmp 2b |
jmp 2b |
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/* |
/* |
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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 */ |
1: CHECK_DEFERRED_SWITCH(%eax) |
1: CHECK_DEFERRED_SWITCH |
jnz 9f |
jnz 9f |
#ifndef DIAGNOSTIC |
#ifndef DIAGNOSTIC |
INTRFASTEXIT |
INTRFASTEXIT |
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pushl $4f |
pushl $4f |
call _C_LABEL(printf) |
call _C_LABEL(printf) |
addl $4,%esp |
addl $4,%esp |
#ifdef DDB |
pushl $IPL_NONE |
int $3 |
call _C_LABEL(spllower) |
#endif /* DDB */ |
addl $4,%esp |
movl $IPL_NONE,CPUVAR(ILEVEL) |
jmp .Lsyscall_checkast |
jmp 2b |
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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" |
Line 936 NENTRY(npx586bug1) |
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Line 969 NENTRY(npx586bug1) |
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popl %eax |
popl %eax |
ret |
ret |
#endif /* NNPX > 0 */ |
#endif /* NNPX > 0 */ |
|
|
|
/* |
|
* void sse2_zero_page(void *pg) |
|
* |
|
* Zero a page without polluting the cache. |
|
*/ |
|
ENTRY(sse2_zero_page) |
|
pushl %ebp |
|
movl %esp,%ebp |
|
movl 8(%esp), %edx |
|
movl $PAGE_SIZE, %ecx |
|
xorl %eax, %eax |
|
.align 16 |
|
1: |
|
movnti %eax, 0(%edx) |
|
movnti %eax, 4(%edx) |
|
movnti %eax, 8(%edx) |
|
movnti %eax, 12(%edx) |
|
movnti %eax, 16(%edx) |
|
movnti %eax, 20(%edx) |
|
movnti %eax, 24(%edx) |
|
movnti %eax, 28(%edx) |
|
subl $32, %ecx |
|
leal 32(%edx), %edx |
|
jnz 1b |
|
sfence |
|
pop %ebp |
|
ret |
|
|
|
/* |
|
* void sse2_copy_page(void *src, void *dst) |
|
* |
|
* Copy a page without polluting the cache. |
|
*/ |
|
ENTRY(sse2_copy_page) |
|
pushl %ebp |
|
pushl %ebx |
|
pushl %esi |
|
pushl %edi |
|
movl 20(%esp), %esi |
|
movl 24(%esp), %edi |
|
movl $PAGE_SIZE, %ebp |
|
.align 16 |
|
1: |
|
movl 0(%esi), %eax |
|
movl 4(%esi), %ebx |
|
movl 8(%esi), %ecx |
|
movl 12(%esi), %edx |
|
movnti %eax, 0(%edi) |
|
movnti %ebx, 4(%edi) |
|
movnti %ecx, 8(%edi) |
|
movnti %edx, 12(%edi) |
|
subl $16, %ebp |
|
leal 16(%esi), %esi |
|
leal 16(%edi), %edi |
|
jnz 1b |
|
sfence |
|
popl %edi |
|
popl %esi |
|
popl %ebx |
|
popl %ebp |
|
ret |