| locore.s (5603) | locore.s (5908) |
|---|---|
| 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)locore.s 7.3 (Berkeley) 5/13/91 | 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)locore.s 7.3 (Berkeley) 5/13/91 |
| 37 * $Id: locore.s,v 1.45 1994/11/18 05:27:34 phk Exp $ | 37 * $Id: locore.s,v 1.46 1995/01/14 13:20:07 bde Exp $ |
| 38 */ 39 40/* 41 * locore.s: FreeBSD machine support for the Intel 386 42 * originally from: locore.s, by William F. Jolitz 43 * 44 * Substantially rewritten by David Greenman, Rod Grimes, 45 * Bruce Evans, Wolfgang Solfrank, and many others. 46 */ 47 48#include "assym.s" /* system definitions */ 49#include <machine/psl.h> /* processor status longword defs */ 50#include <machine/pte.h> /* page table entry definitions */ 51#include <sys/errno.h> /* error return codes */ 52#include <machine/specialreg.h> /* x86 special registers */ 53#include <machine/cputypes.h> /* x86 cpu type definitions */ 54#include <sys/syscall.h> /* system call numbers */ 55#include <machine/asmacros.h> /* miscellaneous asm macros */ | 38 */ 39 40/* 41 * locore.s: FreeBSD machine support for the Intel 386 42 * originally from: locore.s, by William F. Jolitz 43 * 44 * Substantially rewritten by David Greenman, Rod Grimes, 45 * Bruce Evans, Wolfgang Solfrank, and many others. 46 */ 47 48#include "assym.s" /* system definitions */ 49#include <machine/psl.h> /* processor status longword defs */ 50#include <machine/pte.h> /* page table entry definitions */ 51#include <sys/errno.h> /* error return codes */ 52#include <machine/specialreg.h> /* x86 special registers */ 53#include <machine/cputypes.h> /* x86 cpu type definitions */ 54#include <sys/syscall.h> /* system call numbers */ 55#include <machine/asmacros.h> /* miscellaneous asm macros */ |
| 56#include <sys/reboot.h> |
|
| 56#include "apm.h" 57#if NAPM > 0 58#define ASM 59#include <machine/apm_bios.h> 60#include <machine/apm_segments.h> 61#endif /* NAPM */ 62 63/* --- 55 unchanged lines hidden (view full) --- 119 120 .globl _boothowto,_bootdev 121 122 .globl _cpu,_cold,_atdevbase,_cpu_vendor,_cpu_id,_bootinfo 123 124_cpu: .long 0 /* are we 386, 386sx, or 486 */ 125_cpu_id: .long 0 /* stepping ID */ 126_cpu_vendor: .space 20 /* CPU origin code */ | 57#include "apm.h" 58#if NAPM > 0 59#define ASM 60#include <machine/apm_bios.h> 61#include <machine/apm_segments.h> 62#endif /* NAPM */ 63 64/* --- 55 unchanged lines hidden (view full) --- 120 121 .globl _boothowto,_bootdev 122 123 .globl _cpu,_cold,_atdevbase,_cpu_vendor,_cpu_id,_bootinfo 124 125_cpu: .long 0 /* are we 386, 386sx, or 486 */ 126_cpu_id: .long 0 /* stepping ID */ 127_cpu_vendor: .space 20 /* CPU origin code */ |
| 127_bootinfo: .space BOOTINFO_SIZE /* the bootstrapper knew it! */ | 128_bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */ |
| 128_cold: .long 1 /* cold till we are not */ 129_atdevbase: .long 0 /* location of start of iomem in virtual */ 130_atdevphys: .long 0 /* location of device mapping ptes (phys) */ 131 132_KERNend: .long 0 /* phys addr end of kernel (just after bss) */ 133 134 .globl _IdlePTD 135_IdlePTD: .long 0 /* phys addr of kernel PTD */ --- 102 unchanged lines hidden (view full) --- 238 239 /* 240 * We have been loaded by the new uniform boot code. 241 * Lets check the bootinfo version, and if we do not understand 242 * it we return to the loader with a status of 1 to indicate this error 243 */ 2441: /* newboot: */ 245 movl 28(%ebp),%ebx /* &bootinfo.version */ | 129_cold: .long 1 /* cold till we are not */ 130_atdevbase: .long 0 /* location of start of iomem in virtual */ 131_atdevphys: .long 0 /* location of device mapping ptes (phys) */ 132 133_KERNend: .long 0 /* phys addr end of kernel (just after bss) */ 134 135 .globl _IdlePTD 136_IdlePTD: .long 0 /* phys addr of kernel PTD */ --- 102 unchanged lines hidden (view full) --- 239 240 /* 241 * We have been loaded by the new uniform boot code. 242 * Lets check the bootinfo version, and if we do not understand 243 * it we return to the loader with a status of 1 to indicate this error 244 */ 2451: /* newboot: */ 246 movl 28(%ebp),%ebx /* &bootinfo.version */ |
| 246 movl BOOTINFO_VERSION(%ebx),%eax | 247 movl BI_VERSION(%ebx),%eax |
| 247 cmpl $1,%eax /* We only understand version 1 */ 248 je 1f 249 movl $1,%eax /* Return status */ 250 leave 251 ret 252 2531: 254 /* 255 * If we have a kernelname copy it in 256 */ | 248 cmpl $1,%eax /* We only understand version 1 */ 249 je 1f 250 movl $1,%eax /* Return status */ 251 leave 252 ret 253 2541: 255 /* 256 * If we have a kernelname copy it in 257 */ |
| 257 movl BOOTINFO_KERNELNAME(%ebx),%esi | 258 movl BI_KERNELNAME(%ebx),%esi |
| 258 cmpl $0,%esi 259 je 1f /* No kernelname */ 260 lea _kernelname-KERNBASE,%edi 261 movl $MAXPATHLEN,%ecx /* Brute force!!! */ 262 cld 263 rep 264 movsb 265 2661: 267 /* | 259 cmpl $0,%esi 260 je 1f /* No kernelname */ 261 lea _kernelname-KERNBASE,%edi 262 movl $MAXPATHLEN,%ecx /* Brute force!!! */ 263 cld 264 rep 265 movsb 266 2671: 268 /* |
| 268 * Copy the bootinfo structure | 269 * Determine the size of the boot loader's copy of the bootinfo 270 * struct. This is impossible to do properly because old versions 271 * of the struct don't contain a size field and there are 2 old 272 * versions with the same version number. |
| 269 */ | 273 */ |
| 274 movl $BI_ENDCOMMON,%ecx /* prepare for sizeless version */ 275 testl $RB_BOOTINFO,8(%ebp) /* bi_size (and bootinfo) valid? */ 276 je got_bi_size /* no, sizeless version */ 277 movl BI_SIZE(%ebx),%ecx 278got_bi_size: 279 280 /* 281 * Copy the common part of the bootinfo struct 282 */ |
|
| 270 movl %ebx,%esi | 283 movl %ebx,%esi |
| 271 lea _bootinfo-KERNBASE,%edi | 284 movl $_bootinfo-KERNBASE,%edi 285 cmpl $BOOTINFO_SIZE,%ecx 286 jbe got_common_bi_size |
| 272 movl $BOOTINFO_SIZE,%ecx | 287 movl $BOOTINFO_SIZE,%ecx |
| 288got_common_bi_size: |
|
| 273 cld 274 rep 275 movsb 276 277#ifdef NFS 278 /* 279 * If we have a nfs_diskless structure copy it in 280 */ | 289 cld 290 rep 291 movsb 292 293#ifdef NFS 294 /* 295 * If we have a nfs_diskless structure copy it in 296 */ |
| 281 movl BOOTINFO_NFS_DISKLESS(%ebx),%esi | 297 movl BI_NFS_DISKLESS(%ebx),%esi |
| 282 cmpl $0,%esi 283 je 2f 284 lea _nfs_diskless-KERNBASE,%edi 285 movl $NFSDISKLESS_SIZE,%ecx 286 cld 287 rep 288 movsb 289 lea _nfs_diskless_valid-KERNBASE,%edi --- 222 unchanged lines hidden (view full) --- 512/* clear bss */ 513 movl $_edata-KERNBASE,%edi 514 subl %edi,%ecx /* get amount to clear */ 515 xorl %eax,%eax /* specify zero fill */ 516 cld 517 rep 518 stosb 519 | 298 cmpl $0,%esi 299 je 2f 300 lea _nfs_diskless-KERNBASE,%edi 301 movl $NFSDISKLESS_SIZE,%ecx 302 cld 303 rep 304 movsb 305 lea _nfs_diskless_valid-KERNBASE,%edi --- 222 unchanged lines hidden (view full) --- 528/* clear bss */ 529 movl $_edata-KERNBASE,%edi 530 subl %edi,%ecx /* get amount to clear */ 531 xorl %eax,%eax /* specify zero fill */ 532 cld 533 rep 534 stosb 535 |
| 536#ifdef DDB 537/* include symbols in "kernel image" if they are loaded */ 538 movl _bootinfo+BI_ESYMTAB-KERNBASE,%edi 539 testl %edi,%edi 540 je over_symalloc 541 addl $NBPG-1,%edi 542 andl $~(NBPG-1),%edi 543 movl %edi,%esi 544 movl %esi,_KERNend-KERNBASE 545 movl $KERNBASE,%edi 546 addl %edi,_bootinfo+BI_SYMTAB-KERNBASE 547 addl %edi,_bootinfo+BI_ESYMTAB-KERNBASE 548over_symalloc: 549#endif 550 |
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| 520/* 521 * The value in esi is both the end of the kernel bss and a pointer to 522 * the kernel page directory, and is used by the rest of locore to build 523 * the tables. 524 * esi + 1(page dir) + 2(UPAGES) + 1(p0stack) + NKPT(number of kernel 525 * page table pages) is then passed on the stack to init386(first) as 526 * the value first. esi should ALWAYS be page aligned!! 527 */ --- 290 unchanged lines hidden --- | 551/* 552 * The value in esi is both the end of the kernel bss and a pointer to 553 * the kernel page directory, and is used by the rest of locore to build 554 * the tables. 555 * esi + 1(page dir) + 2(UPAGES) + 1(p0stack) + NKPT(number of kernel 556 * page table pages) is then passed on the stack to init386(first) as 557 * the value first. esi should ALWAYS be page aligned!! 558 */ --- 290 unchanged lines hidden --- |