locore.s revision 43447
14Srgrimes/*- 24Srgrimes * Copyright (c) 1990 The Regents of the University of California. 34Srgrimes * All rights reserved. 44Srgrimes * 54Srgrimes * This code is derived from software contributed to Berkeley by 64Srgrimes * William Jolitz. 74Srgrimes * 84Srgrimes * Redistribution and use in source and binary forms, with or without 94Srgrimes * modification, are permitted provided that the following conditions 104Srgrimes * are met: 114Srgrimes * 1. Redistributions of source code must retain the above copyright 124Srgrimes * notice, this list of conditions and the following disclaimer. 134Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 144Srgrimes * notice, this list of conditions and the following disclaimer in the 154Srgrimes * documentation and/or other materials provided with the distribution. 164Srgrimes * 3. All advertising materials mentioning features or use of this software 174Srgrimes * must display the following acknowledgement: 184Srgrimes * This product includes software developed by the University of 194Srgrimes * California, Berkeley and its contributors. 204Srgrimes * 4. Neither the name of the University nor the names of its contributors 214Srgrimes * may be used to endorse or promote products derived from this software 224Srgrimes * without specific prior written permission. 234Srgrimes * 244Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 254Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 264Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 274Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 284Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 294Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 304Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 314Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 324Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 334Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 344Srgrimes * SUCH DAMAGE. 354Srgrimes * 36556Srgrimes * from: @(#)locore.s 7.3 (Berkeley) 5/13/91 3743447Skato * $Id: locore.s,v 1.119 1999/01/30 15:38:47 kato Exp $ 3815392Sphk * 39757Sdg * originally from: locore.s, by William F. Jolitz 40757Sdg * 41757Sdg * Substantially rewritten by David Greenman, Rod Grimes, 4215392Sphk * Bruce Evans, Wolfgang Solfrank, Poul-Henning Kamp 4315392Sphk * and many others. 444Srgrimes */ 454Srgrimes 4614835Sbde#include "apm.h" 4732358Seivind#include "opt_bootp.h" 4813228Swollman#include "opt_ddb.h" 4937272Sjmg#include "opt_nfsroot.h" 5018702Sjkh#include "opt_userconfig.h" 5130265Speter#include "opt_vm86.h" 5214835Sbde 5314835Sbde#include <sys/syscall.h> 545908Sbde#include <sys/reboot.h> 554Srgrimes 5614835Sbde#include <machine/asmacros.h> 5714835Sbde#include <machine/cputypes.h> 5814835Sbde#include <machine/psl.h> 5915543Sphk#include <machine/pmap.h> 6014835Sbde#include <machine/specialreg.h> 6114835Sbde 6214835Sbde#include "assym.s" 6314835Sbde 644Srgrimes/* 65757Sdg * XXX 66757Sdg * 674Srgrimes * Note: This version greatly munged to avoid various assembler errors 684Srgrimes * that may be fixed in newer versions of gas. Perhaps newer versions 694Srgrimes * will have more pleasant appearance. 704Srgrimes */ 714Srgrimes 72200Sdg/* 734Srgrimes * PTmap is recursive pagemap at top of virtual address space. 744Srgrimes * Within PTmap, the page directory can be found (third indirection). 754Srgrimes */ 763861Sbde .globl _PTmap,_PTD,_PTDpde 7715543Sphk .set _PTmap,(PTDPTDI << PDRSHIFT) 7815543Sphk .set _PTD,_PTmap + (PTDPTDI * PAGE_SIZE) 79757Sdg .set _PTDpde,_PTD + (PTDPTDI * PDESIZE) 80592Srgrimes 813861Sbde/* 824Srgrimes * APTmap, APTD is the alternate recursive pagemap. 834Srgrimes * It's used when modifying another process's page tables. 844Srgrimes */ 85592Srgrimes .globl _APTmap,_APTD,_APTDpde 86592Srgrimes .set _APTmap,APTDPTDI << PDRSHIFT 8715543Sphk .set _APTD,_APTmap + (APTDPTDI * PAGE_SIZE) 88757Sdg .set _APTDpde,_PTD + (APTDPTDI * PDESIZE) 894Srgrimes 904Srgrimes/* 91556Srgrimes * Globals 92556Srgrimes */ 93556Srgrimes .data 9414835Sbde ALIGN_DATA /* just to be sure */ 95134Sdg 9625083Sjdp .globl HIDENAME(tmpstk) 9713729Sdg .space 0x2000 /* space for tmpstk - temporary stack */ 9825083SjdpHIDENAME(tmpstk): 993842Sdg 1003861Sbde .globl _boothowto,_bootdev 101134Sdg 10215565Sphk .globl _cpu,_cpu_vendor,_cpu_id,_bootinfo 1036308Sphk .globl _cpu_high, _cpu_feature 1042783Ssos 105757Sdg_cpu: .long 0 /* are we 386, 386sx, or 486 */ 1062216Sbde_cpu_id: .long 0 /* stepping ID */ 1076308Sphk_cpu_high: .long 0 /* highest arg to CPUID */ 1086308Sphk_cpu_feature: .long 0 /* features */ 1092216Sbde_cpu_vendor: .space 20 /* CPU origin code */ 1105908Sbde_bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */ 1114Srgrimes 112757Sdg_KERNend: .long 0 /* phys addr end of kernel (just after bss) */ 11315428Sphkphysfree: .long 0 /* phys addr of next free page */ 114757Sdg 11526812Speter#ifdef SMP 11625164Spetercpu0pp: .long 0 /* phys addr cpu0 private pg */ 11725164Spetercpu0pt: .long 0 /* phys addr cpu0 private pt */ 11825164Speter 11925164Speter .globl _cpu0prvpage,_cpu0prvpt 12025164Speter_cpu0prvpage: .long 0 /* relocated version */ 12125164Speter_cpu0prvpt: .long 0 /* relocated version */ 12226812Speter#endif /* SMP */ 12325164Speter 1243861Sbde .globl _IdlePTD 125757Sdg_IdlePTD: .long 0 /* phys addr of kernel PTD */ 1263861Sbde 12726812Speter#ifdef SMP 12826812Speter .globl _KPTphys 12926812Speter#endif 130757Sdg_KPTphys: .long 0 /* phys addr of kernel page tables */ 1314Srgrimes 132757Sdg .globl _proc0paddr 133757Sdg_proc0paddr: .long 0 /* address of proc 0 address space */ 13424693Speterp0upa: .long 0 /* phys addr of proc0's UPAGES */ 135134Sdg 13634840Sjlemon#ifdef VM86 13737889Sjlemonvm86phystk: .long 0 /* PA of vm86/bios stack */ 13837889Sjlemon 13934840Sjlemon .globl _vm86paddr, _vm86pa 14034840Sjlemon_vm86paddr: .long 0 /* address of vm86 region */ 14134840Sjlemon_vm86pa: .long 0 /* phys addr of vm86 region */ 14234840Sjlemon#endif 14334840Sjlemon 14415428Sphk#ifdef BDE_DEBUGGER 14515428Sphk .globl _bdb_exists /* flag to indicate BDE debugger is present */ 14615428Sphk_bdb_exists: .long 0 14715428Sphk#endif 148718Swollman 14943434Skato#ifdef PC98 15043434Skato .globl _pc98_system_parameter 15143434Skato_pc98_system_parameter: 15243434Skato .space 0x240 15343434Skato#endif 15415428Sphk 15515392Sphk/********************************************************************** 15615392Sphk * 15715392Sphk * Some handy macros 15815392Sphk * 159556Srgrimes */ 160134Sdg 16115392Sphk#define R(foo) ((foo)-KERNBASE) 16215392Sphk 16315392Sphk#define ALLOCPAGES(foo) \ 16415392Sphk movl R(physfree), %esi ; \ 16515543Sphk movl $((foo)*PAGE_SIZE), %eax ; \ 16615392Sphk addl %esi, %eax ; \ 16715392Sphk movl %eax, R(physfree) ; \ 16815392Sphk movl %esi, %edi ; \ 16915543Sphk movl $((foo)*PAGE_SIZE),%ecx ; \ 17015392Sphk xorl %eax,%eax ; \ 17115428Sphk cld ; \ 17215428Sphk rep ; \ 17315428Sphk stosb 17415392Sphk 175134Sdg/* 17615392Sphk * fillkpt 17715565Sphk * eax = page frame address 17815565Sphk * ebx = index into page table 17915392Sphk * ecx = how many pages to map 18015565Sphk * base = base address of page dir/table 18115565Sphk * prot = protection bits 182134Sdg */ 18315565Sphk#define fillkpt(base, prot) \ 18419621Sdyson shll $2,%ebx ; \ 18519621Sdyson addl base,%ebx ; \ 18619621Sdyson orl $PG_V,%eax ; \ 18719621Sdyson orl prot,%eax ; \ 18815565Sphk1: movl %eax,(%ebx) ; \ 18915565Sphk addl $PAGE_SIZE,%eax ; /* increment physical address */ \ 19015565Sphk addl $4,%ebx ; /* next pte */ \ 19115428Sphk loop 1b 19215392Sphk 19315565Sphk/* 19415565Sphk * fillkptphys(prot) 19515565Sphk * eax = physical address 19615565Sphk * ecx = how many pages to map 19715565Sphk * prot = protection bits 19815565Sphk */ 19915565Sphk#define fillkptphys(prot) \ 20015565Sphk movl %eax, %ebx ; \ 20115565Sphk shrl $PAGE_SHIFT, %ebx ; \ 20215565Sphk fillkpt(R(_KPTphys), prot) 20315565Sphk 20415392Sphk .text 20515392Sphk/********************************************************************** 20615392Sphk * 20715392Sphk * This is where the bootblocks start us, set the ball rolling... 20815392Sphk * 20915392Sphk */ 2101321SdgNON_GPROF_ENTRY(btext) 2114Srgrimes 21224112Skato#ifdef PC98 21324112Skato /* save SYSTEM PARAMETER for resume (NS/T or other) */ 21443434Skato movl $0xa1400,%esi 21543434Skato movl $R(_pc98_system_parameter),%edi 21643434Skato movl $0x0240,%ecx 21724112Skato cld 21824112Skato rep 21924112Skato movsb 22024112Skato#else /* IBM-PC */ 22115428Sphk#ifdef BDE_DEBUGGER 22215428Sphk#ifdef BIOS_STEALS_3K 22315428Sphk cmpl $0x0375c339,0x95504 22415428Sphk#else 22515428Sphk cmpl $0x0375c339,0x96104 /* XXX - debugger signature */ 22615428Sphk#endif 22715428Sphk jne 1f 22815428Sphk movb $1,R(_bdb_exists) 22915428Sphk1: 23015428Sphk#endif 23140179Skato#endif /* PC98 */ 23215428Sphk 23315392Sphk/* Tell the bios to warmboot next time */ 23415392Sphk movw $0x1234,0x472 23515392Sphk 23615428Sphk/* Set up a real frame in case the double return in newboot is executed. */ 2373384Srgrimes pushl %ebp 2383384Srgrimes movl %esp, %ebp 2393384Srgrimes 24015392Sphk/* Don't trust what the BIOS gives for eflags. */ 2415603Sbde pushl $PSL_KERNEL 2422486Sdg popfl 24315428Sphk 24415428Sphk/* 24515428Sphk * Don't trust what the BIOS gives for %fs and %gs. Trust the bootstrap 24615428Sphk * to set %cs, %ds, %es and %ss. 24715428Sphk */ 24815428Sphk mov %ds, %ax 2494217Sphk mov %ax, %fs 2504217Sphk mov %ax, %gs 2514217Sphk 25215392Sphk call recover_bootinfo 25315392Sphk 25415428Sphk/* Get onto a stack that we can trust. */ 25515428Sphk/* 25615428Sphk * XXX this step is delayed in case recover_bootinfo needs to return via 25715428Sphk * the old stack, but it need not be, since recover_bootinfo actually 25815428Sphk * returns via the old frame. 25915428Sphk */ 26025083Sjdp movl $R(HIDENAME(tmpstk)),%esp 26115392Sphk 26224112Skato#ifdef PC98 26343447Skato /* pc98_machine_type & M_EPSON_PC98 */ 26443447Skato testb $0x02,R(_pc98_system_parameter)+220 26524112Skato jz 3f 26643447Skato /* epson_machine_id <= 0x0b */ 26743447Skato cmpb $0x0b,R(_pc98_system_parameter)+224 26824112Skato ja 3f 26924112Skato 27024112Skato /* count up memory */ 27124112Skato movl $0x100000,%eax /* next, talley remaining memory */ 27224112Skato movl $0xFFF-0x100,%ecx 27324112Skato1: movl 0(%eax),%ebx /* save location to check */ 27424112Skato movl $0xa55a5aa5,0(%eax) /* write test pattern */ 27524112Skato cmpl $0xa55a5aa5,0(%eax) /* does not check yet for rollover */ 27624112Skato jne 2f 27724112Skato movl %ebx,0(%eax) /* restore memory */ 27824112Skato addl $PAGE_SIZE,%eax 27924112Skato loop 1b 28024112Skato2: subl $0x100000,%eax 28124112Skato shrl $17,%eax 28243447Skato movb %al,R(_pc98_system_parameter)+1 28324112Skato3: 28424112Skato#endif 28524112Skato 28615392Sphk call identify_cpu 28715392Sphk 28815392Sphk/* clear bss */ 28915428Sphk/* 29017120Sbde * XXX this should be done a little earlier. 29115428Sphk * 29217120Sbde * XXX we don't check that there is memory for our bss and page tables 29317120Sbde * before using it. 29415428Sphk * 29515428Sphk * XXX the boot program somewhat bogusly clears the bss. We still have 29615428Sphk * to do it in case we were unzipped by kzipboot. Then the boot program 29715428Sphk * only clears kzipboot's bss. 29815428Sphk * 29915428Sphk * XXX the gdt and idt are still somewhere in the boot program. We 30015428Sphk * depend on the convention that the boot program is below 1MB and we 30115428Sphk * are above 1MB to keep the gdt and idt away from the bss and page 30217120Sbde * tables. The idt is only used if BDE_DEBUGGER is enabled. 30315428Sphk */ 30415392Sphk movl $R(_end),%ecx 30515392Sphk movl $R(_edata),%edi 30615392Sphk subl %edi,%ecx 30715392Sphk xorl %eax,%eax 30815428Sphk cld 30915428Sphk rep 31015428Sphk stosb 31115392Sphk 31215392Sphk#if NAPM > 0 31336596Smsmith#ifndef VM86 31415428Sphk/* 31515428Sphk * XXX it's not clear that APM can live in the current environonment. 31615428Sphk * Only pc-relative addressing works. 31715428Sphk */ 31815428Sphk call _apm_setup 31915428Sphk#endif 32036596Smsmith#endif 32115392Sphk 32215392Sphk call create_pagetables 32315392Sphk 32427993Sdyson#ifdef VM86 32527993Sdyson/* 32627993Sdyson * If the CPU has support for VME, turn it on. 32727993Sdyson */ 32827993Sdyson testl $CPUID_VME, R(_cpu_feature) 32927993Sdyson jz 1f 33027993Sdyson movl %cr4, %eax 33127993Sdyson orl $CR4_VME, %eax 33227993Sdyson movl %eax, %cr4 33327993Sdyson1: 33427993Sdyson#endif /* VM86 */ 33527993Sdyson 33615428Sphk#ifdef BDE_DEBUGGER 33715428Sphk/* 33815428Sphk * Adjust as much as possible for paging before enabling paging so that the 33915428Sphk * adjustments can be traced. 34015428Sphk */ 34115428Sphk call bdb_prepare_paging 34215428Sphk#endif 34315428Sphk 34415392Sphk/* Now enable paging */ 34515392Sphk movl R(_IdlePTD), %eax 34615392Sphk movl %eax,%cr3 /* load ptd addr into mmu */ 34715392Sphk movl %cr0,%eax /* get control word */ 34815392Sphk orl $CR0_PE|CR0_PG,%eax /* enable paging */ 34915392Sphk movl %eax,%cr0 /* and let's page NOW! */ 35015392Sphk 35115428Sphk#ifdef BDE_DEBUGGER 35215428Sphk/* 35315428Sphk * Complete the adjustments for paging so that we can keep tracing through 35417120Sbde * initi386() after the low (physical) addresses for the gdt and idt become 35515428Sphk * invalid. 35615428Sphk */ 35715428Sphk call bdb_commit_paging 35815428Sphk#endif 35915428Sphk 36015428Sphk pushl $begin /* jump to high virtualized address */ 36115392Sphk ret 36215392Sphk 36315392Sphk/* now running relocated at KERNBASE where the system is linked to run */ 36415392Sphkbegin: 36515392Sphk /* set up bootstrap stack */ 36624691Speter movl _proc0paddr,%esp /* location of in-kernel pages */ 36724691Speter addl $UPAGES*PAGE_SIZE,%esp /* bootstrap stack end location */ 36815392Sphk xorl %eax,%eax /* mark end of frames */ 36915392Sphk movl %eax,%ebp 37015392Sphk movl _proc0paddr,%eax 37115392Sphk movl _IdlePTD, %esi 37215392Sphk movl %esi,PCB_CR3(%eax) 37335072Speter movl $_proc0,_curproc 37415392Sphk 37515392Sphk movl physfree, %esi 37615392Sphk pushl %esi /* value of first for init386(first) */ 37715392Sphk call _init386 /* wire 386 chip for unix operation */ 37815392Sphk popl %esi 37915392Sphk 38015392Sphk .globl __ucodesel,__udatasel 38115392Sphk 38215392Sphk pushl $0 /* unused */ 38315392Sphk pushl __udatasel /* ss */ 38415392Sphk pushl $0 /* esp - filled in by execve() */ 38515392Sphk pushl $PSL_USER /* eflags (IOPL 0, int enab) */ 38615392Sphk pushl __ucodesel /* cs */ 38715392Sphk pushl $0 /* eip - filled in by execve() */ 38815392Sphk subl $(12*4),%esp /* space for rest of registers */ 38915392Sphk 39015392Sphk pushl %esp /* call main with frame pointer */ 39115392Sphk call _main /* autoconfiguration, mountroot etc */ 39215392Sphk 39324691Speter hlt /* never returns to here */ 39415392Sphk 39524691Speter/* 39624691Speter * When starting init, call this to configure the process for user 39724691Speter * mode. This will be inherited by other processes. 39824691Speter */ 39924691SpeterNON_GPROF_ENTRY(prepare_usermode) 40015392Sphk /* 40124112Skato * Now we've run main() and determined what cpu-type we are, we can 40215392Sphk * enable write protection and alignment checking on i486 cpus and 40315392Sphk * above. 40415392Sphk */ 40515392Sphk#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU) 40615392Sphk cmpl $CPUCLASS_386,_cpu_class 40715392Sphk je 1f 40815392Sphk movl %cr0,%eax /* get control word */ 40915392Sphk orl $CR0_WP|CR0_AM,%eax /* enable i486 features */ 41015392Sphk movl %eax,%cr0 /* and do it */ 41115428Sphk1: 41215392Sphk#endif 41315392Sphk /* 41415392Sphk * on return from main(), we are process 1 41515392Sphk * set up address space and stack so that we can 'return' to user mode 41615392Sphk */ 41715392Sphk movl __ucodesel,%eax 41815392Sphk movl __udatasel,%ecx 41915392Sphk 42024691Speter#if 0 42115392Sphk movl %cx,%ds 42224691Speter#endif 42315392Sphk movl %cx,%es 42415392Sphk movl %ax,%fs /* double map cs to fs */ 42515392Sphk movl %cx,%gs /* and ds to gs */ 42624691Speter ret /* goto user! */ 42715392Sphk 42824691Speter 42915392Sphk#define LCALL(x,y) .byte 0x9a ; .long y ; .word x 43015392Sphk 43115392Sphk/* 43215392Sphk * Signal trampoline, copied to top of user stack 43315392Sphk */ 43415392SphkNON_GPROF_ENTRY(sigcode) 43515392Sphk call SIGF_HANDLER(%esp) 43615392Sphk lea SIGF_SC(%esp),%eax /* scp (the call may have clobbered the */ 43715392Sphk /* copy at 8(%esp)) */ 43815392Sphk pushl %eax 43915392Sphk pushl %eax /* junk to fake return address */ 44015392Sphk movl $SYS_sigreturn,%eax /* sigreturn() */ 44115392Sphk LCALL(0x7,0) /* enter kernel with args on stack */ 44215392Sphk hlt /* never gets here */ 44325083Sjdp ALIGN_TEXT 44415392Sphk_esigcode: 44515392Sphk 44615392Sphk .data 44715392Sphk .globl _szsigcode 44815392Sphk_szsigcode: 44915392Sphk .long _esigcode-_sigcode 45015428Sphk .text 45115392Sphk 45215392Sphk/********************************************************************** 45315392Sphk * 45415392Sphk * Recover the bootinfo passed to us from the boot program 45515392Sphk * 45615392Sphk */ 45715392Sphkrecover_bootinfo: 45815392Sphk /* 4593284Srgrimes * This code is called in different ways depending on what loaded 4603284Srgrimes * and started the kernel. This is used to detect how we get the 4613284Srgrimes * arguments from the other code and what we do with them. 4623284Srgrimes * 4633284Srgrimes * Old disk boot blocks: 4643284Srgrimes * (*btext)(howto, bootdev, cyloffset, esym); 4653284Srgrimes * [return address == 0, and can NOT be returned to] 4663284Srgrimes * [cyloffset was not supported by the FreeBSD boot code 4673284Srgrimes * and always passed in as 0] 4683284Srgrimes * [esym is also known as total in the boot code, and 4693284Srgrimes * was never properly supported by the FreeBSD boot code] 4703284Srgrimes * 4713284Srgrimes * Old diskless netboot code: 4723284Srgrimes * (*btext)(0,0,0,0,&nfsdiskless,0,0,0); 4733284Srgrimes * [return address != 0, and can NOT be returned to] 4743284Srgrimes * If we are being booted by this code it will NOT work, 4753284Srgrimes * so we are just going to halt if we find this case. 4763284Srgrimes * 4773284Srgrimes * New uniform boot code: 4783284Srgrimes * (*btext)(howto, bootdev, 0, 0, 0, &bootinfo) 4793284Srgrimes * [return address != 0, and can be returned to] 4803284Srgrimes * 4813284Srgrimes * There may seem to be a lot of wasted arguments in here, but 4823384Srgrimes * that is so the newer boot code can still load very old kernels 4833384Srgrimes * and old boot code can load new kernels. 4844Srgrimes */ 4853284Srgrimes 4863284Srgrimes /* 4873284Srgrimes * The old style disk boot blocks fake a frame on the stack and 4883284Srgrimes * did an lret to get here. The frame on the stack has a return 4893284Srgrimes * address of 0. 4903284Srgrimes */ 4913384Srgrimes cmpl $0,4(%ebp) 49215392Sphk je olddiskboot 4933284Srgrimes 4943284Srgrimes /* 4953284Srgrimes * We have some form of return address, so this is either the 4963284Srgrimes * old diskless netboot code, or the new uniform code. That can 49715428Sphk * be detected by looking at the 5th argument, if it is 0 49815428Sphk * we are being booted by the new uniform boot code. 4993284Srgrimes */ 5003384Srgrimes cmpl $0,24(%ebp) 50115392Sphk je newboot 5023284Srgrimes 5033284Srgrimes /* 5043284Srgrimes * Seems we have been loaded by the old diskless boot code, we 5053284Srgrimes * don't stand a chance of running as the diskless structure 5063284Srgrimes * changed considerably between the two, so just halt. 5073284Srgrimes */ 5083284Srgrimes hlt 5093284Srgrimes 5103284Srgrimes /* 5113384Srgrimes * We have been loaded by the new uniform boot code. 51215428Sphk * Let's check the bootinfo version, and if we do not understand 5133384Srgrimes * it we return to the loader with a status of 1 to indicate this error 5143284Srgrimes */ 51515392Sphknewboot: 5163384Srgrimes movl 28(%ebp),%ebx /* &bootinfo.version */ 5175908Sbde movl BI_VERSION(%ebx),%eax 5183384Srgrimes cmpl $1,%eax /* We only understand version 1 */ 5193384Srgrimes je 1f 5203384Srgrimes movl $1,%eax /* Return status */ 5213384Srgrimes leave 52215428Sphk /* 52315428Sphk * XXX this returns to our caller's caller (as is required) since 52415428Sphk * we didn't set up a frame and our caller did. 52515428Sphk */ 5263384Srgrimes ret 5273284Srgrimes 5283384Srgrimes1: 5293284Srgrimes /* 5303384Srgrimes * If we have a kernelname copy it in 5313384Srgrimes */ 5325908Sbde movl BI_KERNELNAME(%ebx),%esi 5333384Srgrimes cmpl $0,%esi 5349344Sdg je 2f /* No kernelname */ 5359344Sdg movl $MAXPATHLEN,%ecx /* Brute force!!! */ 53615926Sphk movl $R(_kernelname),%edi 5379344Sdg cmpb $'/',(%esi) /* Make sure it starts with a slash */ 5389344Sdg je 1f 5399344Sdg movb $'/',(%edi) 5409344Sdg incl %edi 5419344Sdg decl %ecx 5429344Sdg1: 5433384Srgrimes cld 5443384Srgrimes rep 5453384Srgrimes movsb 5463384Srgrimes 5479344Sdg2: 54815428Sphk /* 5495908Sbde * Determine the size of the boot loader's copy of the bootinfo 5505908Sbde * struct. This is impossible to do properly because old versions 5515908Sbde * of the struct don't contain a size field and there are 2 old 5525908Sbde * versions with the same version number. 5534600Sphk */ 5545908Sbde movl $BI_ENDCOMMON,%ecx /* prepare for sizeless version */ 5555908Sbde testl $RB_BOOTINFO,8(%ebp) /* bi_size (and bootinfo) valid? */ 5565908Sbde je got_bi_size /* no, sizeless version */ 5575908Sbde movl BI_SIZE(%ebx),%ecx 5585908Sbdegot_bi_size: 5595908Sbde 56015428Sphk /* 5615908Sbde * Copy the common part of the bootinfo struct 5625908Sbde */ 5634600Sphk movl %ebx,%esi 56415926Sphk movl $R(_bootinfo),%edi 5655908Sbde cmpl $BOOTINFO_SIZE,%ecx 5665908Sbde jbe got_common_bi_size 5674600Sphk movl $BOOTINFO_SIZE,%ecx 5685908Sbdegot_common_bi_size: 5694600Sphk cld 5704600Sphk rep 5714600Sphk movsb 5724600Sphk 57338063Smsmith#ifdef NFS_ROOT 57425837Stegge#ifndef BOOTP_NFSV3 5753384Srgrimes /* 5763384Srgrimes * If we have a nfs_diskless structure copy it in 5773384Srgrimes */ 5785908Sbde movl BI_NFS_DISKLESS(%ebx),%esi 5793384Srgrimes cmpl $0,%esi 58015428Sphk je olddiskboot 58115926Sphk movl $R(_nfs_diskless),%edi 5823384Srgrimes movl $NFSDISKLESS_SIZE,%ecx 5833384Srgrimes cld 5843384Srgrimes rep 5853384Srgrimes movsb 58615926Sphk movl $R(_nfs_diskless_valid),%edi 5873795Sphk movl $1,(%edi) 5883406Sdg#endif 58925837Stegge#endif 5903384Srgrimes 5913384Srgrimes /* 5923284Srgrimes * The old style disk boot. 5933284Srgrimes * (*btext)(howto, bootdev, cyloffset, esym); 5943384Srgrimes * Note that the newer boot code just falls into here to pick 5953384Srgrimes * up howto and bootdev, cyloffset and esym are no longer used 5963284Srgrimes */ 59715392Sphkolddiskboot: 5983384Srgrimes movl 8(%ebp),%eax 59915926Sphk movl %eax,R(_boothowto) 6003384Srgrimes movl 12(%ebp),%eax 60115926Sphk movl %eax,R(_bootdev) 6022783Ssos 60315392Sphk ret 6043258Sdg 6051321Sdg 60615392Sphk/********************************************************************** 60715392Sphk * 60815392Sphk * Identify the CPU and initialize anything special about it 60915392Sphk * 61015392Sphk */ 61115392Sphkidentify_cpu: 61215392Sphk 6131998Swollman /* Try to toggle alignment check flag; does not exist on 386. */ 6141998Swollman pushfl 6151998Swollman popl %eax 6161998Swollman movl %eax,%ecx 6171998Swollman orl $PSL_AC,%eax 6181998Swollman pushl %eax 6191998Swollman popfl 6201998Swollman pushfl 6211998Swollman popl %eax 6221998Swollman xorl %ecx,%eax 6231998Swollman andl $PSL_AC,%eax 6241998Swollman pushl %ecx 6251998Swollman popfl 6261998Swollman 6271998Swollman testl %eax,%eax 62824112Skato jnz try486 62924112Skato 63024112Skato /* NexGen CPU does not have aligment check flag. */ 63124112Skato pushfl 63224112Skato movl $0x5555, %eax 63324112Skato xorl %edx, %edx 63424112Skato movl $2, %ecx 63524112Skato clc 63624112Skato divl %ecx 63724112Skato jz trynexgen 63824112Skato popfl 63915926Sphk movl $CPU_386,R(_cpu) 64013081Sdg jmp 3f 6411998Swollman 64224112Skatotrynexgen: 64327424Skato popfl 64424112Skato movl $CPU_NX586,R(_cpu) 64524112Skato movl $0x4778654e,R(_cpu_vendor) # store vendor string 64624112Skato movl $0x72446e65,R(_cpu_vendor+4) 64724112Skato movl $0x6e657669,R(_cpu_vendor+8) 64824112Skato movl $0,R(_cpu_vendor+12) 64924112Skato jmp 3f 65024112Skato 65124112Skatotry486: /* Try to toggle identification flag; does not exist on early 486s. */ 6521998Swollman pushfl 6531998Swollman popl %eax 6541998Swollman movl %eax,%ecx 6551998Swollman xorl $PSL_ID,%eax 6561998Swollman pushl %eax 6571998Swollman popfl 6581998Swollman pushfl 6591998Swollman popl %eax 6601998Swollman xorl %ecx,%eax 6611998Swollman andl $PSL_ID,%eax 6621998Swollman pushl %ecx 6631998Swollman popfl 6641998Swollman 6651998Swollman testl %eax,%eax 66624112Skato jnz trycpuid 66715926Sphk movl $CPU_486,R(_cpu) 6682495Spst 66924112Skato /* 67024112Skato * Check Cyrix CPU 67124112Skato * Cyrix CPUs do not change the undefined flags following 67224112Skato * execution of the divide instruction which divides 5 by 2. 67324112Skato * 67424112Skato * Note: CPUID is enabled on M2, so it passes another way. 67524112Skato */ 67624112Skato pushfl 67724112Skato movl $0x5555, %eax 67824112Skato xorl %edx, %edx 67924112Skato movl $2, %ecx 68024112Skato clc 68124112Skato divl %ecx 68224112Skato jnc trycyrix 68324112Skato popfl 68424112Skato jmp 3f /* You may use Intel CPU. */ 6852495Spst 68624112Skatotrycyrix: 68724112Skato popfl 68824112Skato /* 68924112Skato * IBM Bluelighting CPU also doesn't change the undefined flags. 69024112Skato * Because IBM doesn't disclose the information for Bluelighting 69124112Skato * CPU, we couldn't distinguish it from Cyrix's (including IBM 69224112Skato * brand of Cyrix CPUs). 69324112Skato */ 69415926Sphk movl $0x69727943,R(_cpu_vendor) # store vendor string 69524112Skato movl $0x736e4978,R(_cpu_vendor+4) 69624112Skato movl $0x64616574,R(_cpu_vendor+8) 69713014Sdg jmp 3f 6981998Swollman 69924112Skatotrycpuid: /* Use the `cpuid' instruction. */ 7001998Swollman xorl %eax,%eax 7016308Sphk .byte 0x0f,0xa2 # cpuid 0 70215926Sphk movl %eax,R(_cpu_high) # highest capability 70315926Sphk movl %ebx,R(_cpu_vendor) # store vendor string 70415926Sphk movl %edx,R(_cpu_vendor+4) 70515926Sphk movl %ecx,R(_cpu_vendor+8) 70615926Sphk movb $0,R(_cpu_vendor+12) 7071998Swollman 7081998Swollman movl $1,%eax 7096308Sphk .byte 0x0f,0xa2 # cpuid 1 71015926Sphk movl %eax,R(_cpu_id) # store cpu_id 71115926Sphk movl %edx,R(_cpu_feature) # store cpu_feature 7126308Sphk rorl $8,%eax # extract family type 7131998Swollman andl $15,%eax 7141998Swollman cmpl $5,%eax 7151998Swollman jae 1f 7161998Swollman 7171998Swollman /* less than Pentium; must be 486 */ 71815926Sphk movl $CPU_486,R(_cpu) 71913000Sdg jmp 3f 72013000Sdg1: 72113000Sdg /* a Pentium? */ 72213000Sdg cmpl $5,%eax 72313000Sdg jne 2f 72415926Sphk movl $CPU_586,R(_cpu) 72513000Sdg jmp 3f 726556Srgrimes2: 72713000Sdg /* Greater than Pentium...call it a Pentium Pro */ 72815926Sphk movl $CPU_686,R(_cpu) 72913000Sdg3: 73015392Sphk ret 731556Srgrimes 7324Srgrimes 73315392Sphk/********************************************************************** 734570Srgrimes * 73515428Sphk * Create the first page directory and its page tables. 73615392Sphk * 737570Srgrimes */ 738570Srgrimes 73915392Sphkcreate_pagetables: 74015392Sphk 74119621Sdyson testl $CPUID_PGE, R(_cpu_feature) 74219621Sdyson jz 1f 74319621Sdyson movl %cr4, %eax 74419621Sdyson orl $CR4_PGE, %eax 74519621Sdyson movl %eax, %cr4 74619621Sdyson1: 74719621Sdyson 74815428Sphk/* Find end of kernel image (rounded up to a page boundary). */ 74915392Sphk movl $R(_end),%esi 7504Srgrimes 75140081Smsmith/* include symbols if loaded and useful */ 7525908Sbde#ifdef DDB 75315392Sphk movl R(_bootinfo+BI_ESYMTAB),%edi 7545908Sbde testl %edi,%edi 75515428Sphk je over_symalloc 7565908Sbde movl %edi,%esi 7575908Sbde movl $KERNBASE,%edi 75815392Sphk addl %edi,R(_bootinfo+BI_SYMTAB) 75915392Sphk addl %edi,R(_bootinfo+BI_ESYMTAB) 76015428Sphkover_symalloc: 7615908Sbde#endif 7625908Sbde 76340081Smsmith/* If we are told where the end of the kernel space is, believe it. */ 76440081Smsmith movl R(_bootinfo+BI_KERNEND),%edi 76540081Smsmith testl %edi,%edi 76640081Smsmith je no_kernend 76740081Smsmith movl %edi,%esi 76840081Smsmithno_kernend: 76940081Smsmith 77015565Sphk addl $PAGE_MASK,%esi 77115565Sphk andl $~PAGE_MASK,%esi 77215392Sphk movl %esi,R(_KERNend) /* save end of kernel */ 77315428Sphk movl %esi,R(physfree) /* next free page is at end of kernel */ 774608Srgrimes 77515392Sphk/* Allocate Kernel Page Tables */ 77615392Sphk ALLOCPAGES(NKPT) 77715392Sphk movl %esi,R(_KPTphys) 778757Sdg 77915392Sphk/* Allocate Page Table Directory */ 78015392Sphk ALLOCPAGES(1) 78115392Sphk movl %esi,R(_IdlePTD) 7824Srgrimes 78315392Sphk/* Allocate UPAGES */ 78415392Sphk ALLOCPAGES(UPAGES) 78517120Sbde movl %esi,R(p0upa) 78615392Sphk addl $KERNBASE, %esi 78715392Sphk movl %esi, R(_proc0paddr) 7884Srgrimes 78934840Sjlemon#ifdef VM86 79037889Sjlemon ALLOCPAGES(1) /* vm86/bios stack */ 79137889Sjlemon movl %esi,R(vm86phystk) 79237889Sjlemon 79337889Sjlemon ALLOCPAGES(3) /* pgtable + ext + IOPAGES */ 79434840Sjlemon movl %esi,R(_vm86pa) 79534840Sjlemon addl $KERNBASE, %esi 79634840Sjlemon movl %esi, R(_vm86paddr) 79734840Sjlemon#endif /* VM86 */ 79834840Sjlemon 79926812Speter#ifdef SMP 80025164Speter/* Allocate cpu0's private data page */ 80125164Speter ALLOCPAGES(1) 80225164Speter movl %esi,R(cpu0pp) 80325164Speter addl $KERNBASE, %esi 80425164Speter movl %esi, R(_cpu0prvpage) /* relocated to KVM space */ 80525164Speter 80625164Speter/* Allocate cpu0's private page table for mapping priv page, apic, etc */ 80725164Speter ALLOCPAGES(1) 80825164Speter movl %esi,R(cpu0pt) 80925164Speter addl $KERNBASE, %esi 81025164Speter movl %esi, R(_cpu0prvpt) /* relocated to KVM space */ 81126812Speter#endif /* SMP */ 81225164Speter 81315392Sphk/* Map read-only from zero to the end of the kernel text section */ 81415565Sphk xorl %eax, %eax 81515428Sphk#ifdef BDE_DEBUGGER 81615428Sphk/* If the debugger is present, actually map everything read-write. */ 81715428Sphk cmpl $0,R(_bdb_exists) 81815428Sphk jne map_read_write 81915428Sphk#endif 82019621Sdyson xorl %edx,%edx 82127484Sdyson 82227484Sdyson#if !defined(SMP) 82319621Sdyson testl $CPUID_PGE, R(_cpu_feature) 82419621Sdyson jz 2f 82519621Sdyson orl $PG_G,%edx 82627484Sdyson#endif 82719621Sdyson 82819621Sdyson2: movl $R(_etext),%ecx 82915565Sphk addl $PAGE_MASK,%ecx 83015565Sphk shrl $PAGE_SHIFT,%ecx 83119621Sdyson fillkptphys(%edx) 832757Sdg 83315392Sphk/* Map read-write, data, bss and symbols */ 83415565Sphk movl $R(_etext),%eax 83515694Sphk addl $PAGE_MASK, %eax 83615694Sphk andl $~PAGE_MASK, %eax 83715428Sphkmap_read_write: 83819621Sdyson movl $PG_RW,%edx 83927484Sdyson#if !defined(SMP) 84019621Sdyson testl $CPUID_PGE, R(_cpu_feature) 84119621Sdyson jz 1f 84219621Sdyson orl $PG_G,%edx 84327484Sdyson#endif 84419621Sdyson 84519621Sdyson1: movl R(_KERNend),%ecx 846757Sdg subl %eax,%ecx 84715543Sphk shrl $PAGE_SHIFT,%ecx 84819621Sdyson fillkptphys(%edx) 849757Sdg 85015428Sphk/* Map page directory. */ 85115392Sphk movl R(_IdlePTD), %eax 85215392Sphk movl $1, %ecx 85319621Sdyson fillkptphys($PG_RW) 854757Sdg 85517120Sbde/* Map proc0's UPAGES in the physical way ... */ 85617120Sbde movl R(p0upa), %eax 85715392Sphk movl $UPAGES, %ecx 85819621Sdyson fillkptphys($PG_RW) 8594Srgrimes 86015565Sphk/* Map ISA hole */ 86115565Sphk movl $ISA_HOLE_START, %eax 86215565Sphk movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx 86322130Sdg fillkptphys($PG_RW) 86415565Sphk 86534840Sjlemon#ifdef VM86 86634840Sjlemon/* Map space for the vm86 region */ 86737889Sjlemon movl R(vm86phystk), %eax 86834840Sjlemon movl $4, %ecx 86934840Sjlemon fillkptphys($PG_RW) 87034840Sjlemon 87134840Sjlemon/* Map page 0 into the vm86 page table */ 87234840Sjlemon movl $0, %eax 87334840Sjlemon movl $0, %ebx 87434840Sjlemon movl $1, %ecx 87534840Sjlemon fillkpt(R(_vm86pa), $PG_RW|PG_U) 87634840Sjlemon 87734840Sjlemon/* ...likewise for the ISA hole */ 87834840Sjlemon movl $ISA_HOLE_START, %eax 87934840Sjlemon movl $ISA_HOLE_START>>PAGE_SHIFT, %ebx 88034840Sjlemon movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx 88134840Sjlemon fillkpt(R(_vm86pa), $PG_RW|PG_U) 88234840Sjlemon#endif /* VM86 */ 88334840Sjlemon 88426812Speter#ifdef SMP 88526812Speter/* Map cpu0's private page into global kmem (4K @ cpu0prvpage) */ 88625164Speter movl R(cpu0pp), %eax 88725164Speter movl $1, %ecx 88825164Speter fillkptphys($PG_RW) 88925164Speter 89026812Speter/* Map cpu0's private page table into global kmem FWIW */ 89125164Speter movl R(cpu0pt), %eax 89225164Speter movl $1, %ecx 89325164Speter fillkptphys($PG_RW) 89425164Speter 89526812Speter/* Map the private page into the private page table into private space */ 89625164Speter movl R(cpu0pp), %eax 89725164Speter movl $0, %ebx /* pte offset = 0 */ 89825164Speter movl $1, %ecx /* one private page coming right up */ 89925164Speter fillkpt(R(cpu0pt), $PG_RW) 90025164Speter 90126812Speter/* Map the page table page into private space */ 90226812Speter movl R(cpu0pt), %eax 90325164Speter movl $1, %ebx /* pte offset = 1 */ 90426812Speter movl $1, %ecx /* one private pt coming right up */ 90526812Speter fillkpt(R(cpu0pt), $PG_RW) 90625164Speter 90726812Speter/* ... and put the page table table in the pde. */ 90825164Speter movl R(cpu0pt), %eax 90925164Speter movl $MPPTDI, %ebx 91025164Speter movl $1, %ecx 91125164Speter fillkpt(R(_IdlePTD), $PG_RW) 91234840Sjlemon 91334840Sjlemon/* Fakeup VA for the local apic to allow early traps. */ 91434840Sjlemon ALLOCPAGES(1) 91534840Sjlemon movl %esi, %eax 91634840Sjlemon movl $2, %ebx /* pte offset = 2 */ 91734840Sjlemon movl $1, %ecx /* one private pt coming right up */ 91834840Sjlemon fillkpt(R(cpu0pt), $PG_RW) 91934840Sjlemon 92034840Sjlemon/* Initialize mp lock to allow early traps */ 92134840Sjlemon movl $1, R(_mp_lock) 92234840Sjlemon 92335072Speter/* Initialize my_idlePTD to IdlePTD */ 92434840Sjlemon movl R(cpu0pp), %eax 92534840Sjlemon movl R(_IdlePTD), %ecx 92635072Speter movl %ecx,GD_MY_IDLEPTD(%eax) 92739702Stegge/* Initialize IdlePTDS[0] */ 92839702Stegge addl $KERNBASE, %ecx 92939702Stegge movl %ecx, R(CNAME(IdlePTDS)) 93034840Sjlemon 93126812Speter#endif /* SMP */ 93225164Speter 93315392Sphk/* install a pde for temporary double map of bottom of VA */ 93415392Sphk movl R(_KPTphys), %eax 93515565Sphk xorl %ebx, %ebx 93615565Sphk movl $1, %ecx 93719621Sdyson fillkpt(R(_IdlePTD), $PG_RW) 9384Srgrimes 93915392Sphk/* install pde's for pt's */ 94015392Sphk movl R(_KPTphys), %eax 94115565Sphk movl $KPTDI, %ebx 94215565Sphk movl $NKPT, %ecx 94319621Sdyson fillkpt(R(_IdlePTD), $PG_RW) 9444Srgrimes 94515392Sphk/* install a pde recursively mapping page directory as a page table */ 94615565Sphk movl R(_IdlePTD), %eax 94715565Sphk movl $PTDPTDI, %ebx 94815565Sphk movl $1,%ecx 94919621Sdyson fillkpt(R(_IdlePTD), $PG_RW) 9504Srgrimes 9514Srgrimes ret 95215428Sphk 95315428Sphk#ifdef BDE_DEBUGGER 95415428Sphkbdb_prepare_paging: 95515428Sphk cmpl $0,R(_bdb_exists) 95615428Sphk je bdb_prepare_paging_exit 95715428Sphk 95815428Sphk subl $6,%esp 95915428Sphk 96015428Sphk /* 96115428Sphk * Copy and convert debugger entries from the bootstrap gdt and idt 96215428Sphk * to the kernel gdt and idt. Everything is still in low memory. 96315428Sphk * Tracing continues to work after paging is enabled because the 96415428Sphk * low memory addresses remain valid until everything is relocated. 96515428Sphk * However, tracing through the setidt() that initializes the trace 96615428Sphk * trap will crash. 96715428Sphk */ 96815428Sphk sgdt (%esp) 96915428Sphk movl 2(%esp),%esi /* base address of bootstrap gdt */ 97015428Sphk movl $R(_gdt),%edi 97115428Sphk movl %edi,2(%esp) /* prepare to load kernel gdt */ 97215428Sphk movl $8*18/4,%ecx 97315428Sphk cld 97415428Sphk rep /* copy gdt */ 97515428Sphk movsl 97615428Sphk movl $R(_gdt),-8+2(%edi) /* adjust gdt self-ptr */ 97715428Sphk movb $0x92,-8+5(%edi) 97815428Sphk lgdt (%esp) 97915428Sphk 98015428Sphk sidt (%esp) 98115428Sphk movl 2(%esp),%esi /* base address of current idt */ 98215428Sphk movl 8+4(%esi),%eax /* convert dbg descriptor to ... */ 98315428Sphk movw 8(%esi),%ax 98415428Sphk movl %eax,R(bdb_dbg_ljmp+1) /* ... immediate offset ... */ 98515428Sphk movl 8+2(%esi),%eax 98615428Sphk movw %ax,R(bdb_dbg_ljmp+5) /* ... and selector for ljmp */ 98715428Sphk movl 24+4(%esi),%eax /* same for bpt descriptor */ 98815428Sphk movw 24(%esi),%ax 98915428Sphk movl %eax,R(bdb_bpt_ljmp+1) 99015428Sphk movl 24+2(%esi),%eax 99115428Sphk movw %ax,R(bdb_bpt_ljmp+5) 99215428Sphk movl $R(_idt),%edi 99315428Sphk movl %edi,2(%esp) /* prepare to load kernel idt */ 99415428Sphk movl $8*4/4,%ecx 99515428Sphk cld 99615428Sphk rep /* copy idt */ 99715428Sphk movsl 99815428Sphk lidt (%esp) 99915428Sphk 100015428Sphk addl $6,%esp 100115428Sphk 100215428Sphkbdb_prepare_paging_exit: 100315428Sphk ret 100415428Sphk 100515428Sphk/* Relocate debugger gdt entries and gdt and idt pointers. */ 100615428Sphkbdb_commit_paging: 100715428Sphk cmpl $0,_bdb_exists 100815428Sphk je bdb_commit_paging_exit 100915428Sphk 101015428Sphk movl $_gdt+8*9,%eax /* adjust slots 9-17 */ 101115428Sphk movl $9,%ecx 101215428Sphkreloc_gdt: 101315428Sphk movb $KERNBASE>>24,7(%eax) /* top byte of base addresses, was 0, */ 101415428Sphk addl $8,%eax /* now KERNBASE>>24 */ 101515428Sphk loop reloc_gdt 101615428Sphk 101715428Sphk subl $6,%esp 101815428Sphk sgdt (%esp) 101915428Sphk addl $KERNBASE,2(%esp) 102015428Sphk lgdt (%esp) 102115428Sphk sidt (%esp) 102215428Sphk addl $KERNBASE,2(%esp) 102315428Sphk lidt (%esp) 102415428Sphk addl $6,%esp 102515428Sphk 102615428Sphk int $3 102715428Sphk 102815428Sphkbdb_commit_paging_exit: 102915428Sphk ret 103015428Sphk 103115428Sphk#endif /* BDE_DEBUGGER */ 1032