version 1.34.2.5, 2007/10/27 11:26:37 |
version 1.51, 2007/09/26 19:48:36 |
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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. |
Line 179 _C_LABEL(cpu): .long 0 # are we 80486, |
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Line 139 _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 |
_C_LABEL(tablesize): .long 0 |
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.space 512 |
.space 512 |
tmpstk: |
tmpstk: |
Line 425 try586: /* Use the `cpuid' instruction. |
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Line 384 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 | L1 ptp |
* text | data | bss | [syms] | page dir | proc0 kstack |
* 0 1 2 3 |
* 0 1 2 3 |
*/ |
*/ |
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#define PROC0PDIR ((0) * PAGE_SIZE) |
#define PROC0_PDIR_OFF 0 |
#define PROC0STACK ((1) * PAGE_SIZE) |
#define PROC0_STK_OFF (PROC0_PDIR_OFF + PAGE_SIZE) |
#define SYSMAP ((1+UPAGES) * PAGE_SIZE) |
#define PROC0_PTP1_OFF (PROC0_STK_OFF + UPAGES * PAGE_SIZE) |
#define TABLESIZE ((1+UPAGES) * PAGE_SIZE) /* + nkpde * 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 459 try586: /* Use the `cpuid' instruction. |
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Line 404 try586: /* Use the `cpuid' instruction. |
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1: |
1: |
#endif |
#endif |
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/* Compute sizes */ |
/* Calculate where to start the bootstrap tables. */ |
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; */ |
/* |
movl %esi,%eax |
* Calculate the size of the kernel page table directory, and |
addl $~L2_FRAME,%eax |
* how many entries it will have. Adjust nkpde to the actual |
shrl $L2_SHIFT,%eax |
* kernel size automatically. Account for the bootstrap tables, |
incl %eax /* one more ptp for VAs stolen by bootstrap */ |
* round up, and add an extra 4MB. |
1: movl %eax,RELOC(nkptp)+1*4 |
*/ |
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leal TABLESIZE+NBPD+PDOFSET(%edi),%eax |
/* tablesize = (1 + UPAGES + nkptp) << PGSHIFT; */ |
shrl $PDSHIFT,%eax |
addl $(1+UPAGES),%eax |
movl RELOC(nkpde),%ecx # get nkpde |
shll $PGSHIFT,%eax |
cmpl %ecx,%eax |
movl %eax,RELOC(tablesize) |
jb 1f |
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movl %eax,%ecx |
/* ensure that nkptp covers bootstrap tables */ |
1: cmpl $NKPTP_MIN,%ecx # larger than min? |
addl %esi,%eax |
jge 1f |
addl $~L2_FRAME,%eax |
movl $NKPTP_MIN,%ecx # set at min |
shrl $L2_SHIFT,%eax |
jmp 2f |
incl %eax |
1: cmpl $NKPTP_MAX,%ecx # larger than max? |
cmpl %eax,RELOC(nkptp)+1*4 |
jle 2f |
jnz 1b |
movl $NKPTP_MAX,%ecx |
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2: movl %ecx,RELOC(nkpde) |
/* Clear tables */ |
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movl %esi,%edi |
/* Clear memory for bootstrap tables. */ |
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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 |
xorl %eax,%eax |
xorl %eax,%eax |
cld |
cld |
movl RELOC(tablesize),%ecx |
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shrl $2,%ecx |
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rep |
rep |
stosl |
stosl |
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leal (PROC0_PTP1_OFF)(%esi), %ebx |
/* |
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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) ; \ |
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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. */ |
* Compute &__data_start - KERNBASE. This can't be > 4G, |
leal (RELOC(etext)+PGOFSET),%edx |
* 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 |
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andl $~PGOFSET,%edx |
andl $~PGOFSET,%edx |
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/* |
/* Skip over the first 1MB. */ |
* Skip the first MB. |
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*/ |
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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,%ecx |
addl %ecx,%ebx |
leal (SYSMAP)(%esi,%ecx,4),%ebx |
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/* Map the kernel text read-only. */ |
/* Map the kernel text read-only. */ |
movl %edx,%ecx |
movl %edx,%ecx |
Line 523 try586: /* Use the `cpuid' instruction. |
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Line 475 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(tablesize),%ecx |
movl RELOC(nkpde),%ecx |
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shll $PGSHIFT,%ecx |
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addl $TABLESIZE,%ecx |
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 mem (later atdevbase) */ |
/* Map ISA I/O memory. */ |
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 537 try586: /* Use the `cpuid' instruction. |
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Line 491 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 */ |
/* Install PDEs for temporary double map of kernel. */ |
leal (PROC0_PDIR_OFF)(%esi),%ebx |
movl RELOC(nkpde),%ecx # for this many pde s, |
leal (PROC0_PTP1_OFF)(%esi),%eax |
leal (PROC0PDIR+0*4)(%esi),%ebx # which is where temp maps! |
orl $(PG_V|PG_KW), %eax |
leal (SYSMAP+PG_V|PG_KW)(%esi),%eax # pte for KPT in proc 0, |
movl RELOC(nkptp)+1*4,%ecx |
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fillkpt |
fillkpt |
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/* Set up top level entries for actual kernel mapping */ |
/* Map kernel PDEs. */ |
leal (PROC0_PDIR_OFF + L2_SLOT_KERNBASE*4)(%esi),%ebx |
movl RELOC(nkpde),%ecx # for this many pde s, |
leal (PROC0_PTP1_OFF)(%esi),%eax |
leal (PROC0PDIR+PDSLOT_KERN*4)(%esi),%ebx # kernel pde offset |
orl $(PG_V|PG_KW), %eax |
leal (SYSMAP+PG_V|PG_KW)(%esi),%eax # pte for KPT in proc 0, |
movl RELOC(nkptp)+1*4,%ecx |
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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*4)(%esi),%ebx |
leal (PROC0PDIR+PG_V|PG_KW)(%esi),%eax # pte for ptd |
leal (PROC0_PDIR_OFF)(%esi),%eax |
movl %eax,(PROC0PDIR+PDSLOT_PTE*4)(%esi) # recursive PD slot |
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. */ |
* Startup checklist: |
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* 1. Load %cr3 with pointer to PDIR. |
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*/ |
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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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*/ |
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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 580 try586: /* Use the `cpuid' instruction. |
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Line 522 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. */ |
* We have arrived. |
movl _C_LABEL(nkpde),%ecx # for this many pde s, |
* There's no need anymore for the identity mapping in low |
leal (PROC0PDIR+0*4)(%esi),%ebx # which is where temp maps! |
* memory, remove it. |
addl $(KERNBASE), %ebx # now use relocated address |
*/ |
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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 |
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1: movl $0,(%ebx) |
1: movl $0,(%ebx) |
addl $4,%ebx |
addl $4,%ebx # next pde |
loop 1b |
loop 1b |
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/* Relocate atdevbase. */ |
/* Relocate atdevbase. */ |
movl $KERNBASE,%edx |
movl _C_LABEL(nkpde),%edx |
addl _C_LABEL(tablesize),%edx |
shll $PGSHIFT,%edx |
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addl $(TABLESIZE+KERNBASE),%edx |
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 (PROC0_STK_OFF+KERNBASE)(%esi),%eax |
leal (PROC0STACK+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(tablesize),%eax |
movl _C_LABEL(nkpde),%eax |
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shll $PGSHIFT,%eax |
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addl $TABLESIZE,%eax |
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 663 NENTRY(lwp_trampoline) |
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Line 604 NENTRY(lwp_trampoline) |
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pushl %ebx |
pushl %ebx |
call *%esi |
call *%esi |
addl $4,%esp |
addl $4,%esp |
DO_DEFERRED_SWITCH |
DO_DEFERRED_SWITCH(%eax) |
INTRFASTEXIT |
INTRFASTEXIT |
/* NOTREACHED */ |
/* NOTREACHED */ |
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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 |
1: CHECK_DEFERRED_SWITCH(%eax) |
jnz 9f |
jnz 9f |
#ifndef DIAGNOSTIC |
#ifndef DIAGNOSTIC |
INTRFASTEXIT |
INTRFASTEXIT |
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int $3 |
int $3 |
#endif /* DDB */ |
#endif /* DDB */ |
movl $IPL_NONE,CPUVAR(ILEVEL) |
movl $IPL_NONE,CPUVAR(ILEVEL) |
jmp .Lsyscall_checkast |
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" |