| locore.s (3117) | locore.s (3258) |
|---|---|
| 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 1.28 1994/09/15 07:26:31 sos Exp $ | 37 * $Id: locore.s,v 1.29 1994/09/26 16:56:22 pst 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 "npx.h" /* for NNPX */ 49#include "assym.s" /* system definitions */ 50#include <machine/psl.h> /* processor status longword defs */ 51#include <machine/pte.h> /* page table entry definitions */ 52#include <sys/errno.h> /* error return codes */ 53#include <machine/specialreg.h> /* x86 special registers */ 54#include <machine/cputypes.h> /* x86 cpu type definitions */ 55#include <sys/syscall.h> /* system call numbers */ 56#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 "npx.h" /* for NNPX */ 49#include "assym.s" /* system definitions */ 50#include <machine/psl.h> /* processor status longword defs */ 51#include <machine/pte.h> /* page table entry definitions */ 52#include <sys/errno.h> /* error return codes */ 53#include <machine/specialreg.h> /* x86 special registers */ 54#include <machine/cputypes.h> /* x86 cpu type definitions */ 55#include <sys/syscall.h> /* system call numbers */ 56#include <machine/asmacros.h> /* miscellaneous asm macros */ |
| 57#ifdef APM 58#define ASM 59#include <machine/apm_bios.h> 60#include <machine/apm_segments.h> 61#endif |
|
| 57 58/* 59 * XXX 60 * 61 * Note: This version greatly munged to avoid various assembler errors 62 * that may be fixed in newer versions of gas. Perhaps newer versions 63 * will have more pleasant appearance. 64 */ --- 60 unchanged lines hidden (view full) --- 125 126 .globl _proc0paddr 127_proc0paddr: .long 0 /* address of proc 0 address space */ 128 129#ifdef BDE_DEBUGGER 130 .globl _bdb_exists /* flag to indicate BDE debugger is available */ 131_bdb_exists: .long 0 132#endif | 62 63/* 64 * XXX 65 * 66 * Note: This version greatly munged to avoid various assembler errors 67 * that may be fixed in newer versions of gas. Perhaps newer versions 68 * will have more pleasant appearance. 69 */ --- 60 unchanged lines hidden (view full) --- 130 131 .globl _proc0paddr 132_proc0paddr: .long 0 /* address of proc 0 address space */ 133 134#ifdef BDE_DEBUGGER 135 .globl _bdb_exists /* flag to indicate BDE debugger is available */ 136_bdb_exists: .long 0 137#endif |
| 138#ifdef APM 139 .globl _apm_current_gdt_pdesc /* current GDT pseudo desc. */ 140_apm_current_gdt_pdesc: 141 .byte 0, 0, 0 |
|
| 133 | 142 |
| 143 .globl _bootstrap_gdt 144_bootstrap_gdt: 145 .space SIZEOF_GDT * BOOTSTRAP_GDT_NUM 146#endif /* APM */ |
|
| 134 .globl tmpstk 135 .space 0x1000 136tmpstk: 137 138 139/* 140 * System Initialization 141 */ --- 48 unchanged lines hidden (view full) --- 190#ifdef DISKLESS /* Copy diskless structure */ 191 movl _nfs_diskless_size-KERNBASE,%ecx 192 movl 20(%esp),%esi 193 movl $(_nfs_diskless-KERNBASE),%edi 194 cld 195 rep 196 movsb 197#endif | 147 .globl tmpstk 148 .space 0x1000 149tmpstk: 150 151 152/* 153 * System Initialization 154 */ --- 48 unchanged lines hidden (view full) --- 203#ifdef DISKLESS /* Copy diskless structure */ 204 movl _nfs_diskless_size-KERNBASE,%ecx 205 movl 20(%esp),%esi 206 movl $(_nfs_diskless-KERNBASE),%edi 207 cld 208 rep 209 movsb 210#endif |
| 211#ifdef APM 212 /* 213 * Setup APM BIOS: 214 * 215 * APM BIOS initialization should be done from real mode or V86 mode. 216 * 217 * (by HOSOKAWA, Tatsumi <hosokawa@mt.cs.keio.ac.jp>) 218 */ |
|
| 198 | 219 |
| 220 /* 221 * Copy APM initializer under 1MB boundary: 222 * 223 * APM initializer program must switch the CPU to real mode. 224 * But FreeBSD kernel runs above 1MB boundary. So we must 225 * copy the initializer code to conventional memory. 226 */ 227 movl _apm_init_image_size-KERNBASE, %ecx /* size */ 228 lea _apm_init_image-KERNBASE, %esi /* source */ 229 movl $ APM_OURADDR, %edi /* destination */ 230 cld 231 rep 232 movsb 233 234 /* get GDT base */ 235 sgdt _apm_current_gdt_pdesc-KERNBASE 236 237 /* copy GDT to _bootstrap_gdt */ 238 xorl %ecx, %ecx 239 movw _apm_current_gdt_pdesc-KERNBASE, %cx 240 movl _apm_current_gdt_pdesc-KERNBASE+2, %esi 241 lea _bootstrap_gdt-KERNBASE, %edi 242 cld 243 rep 244 movsb 245 246 /* setup GDT pseudo descriptor */ 247 movw $(SIZEOF_GDT*BOOTSTRAP_GDT_NUM), %ax 248 movw %ax, _apm_current_gdt_pdesc-KERNBASE 249 leal _bootstrap_gdt-KERNBASE, %eax 250 movl %eax, _apm_current_gdt_pdesc-KERNBASE+2 251 252 /* load new GDTR */ 253 lgdt _apm_current_gdt_pdesc-KERNBASE 254 255 /* setup GDT for APM initializer */ 256 lea _bootstrap_gdt-KERNBASE, %ecx 257 movl $(APM_OURADDR), %eax /* use %ax for 15..0 */ 258 movl %eax, %ebx 259 shrl $16, %ebx /* use %bl for 23..16 */ 260 /* use %bh for 31..24 */ 261#define APM_SETUP_GDT(index, attrib) \ 262 movl $(index), %si ; \ 263 lea 0(%ecx,%esi,8), %edx ; \ 264 movw $0xffff, (%edx) ; \ 265 movw %ax, 2(%edx) ; \ 266 movb %bl, 4(%edx) ; \ 267 movw $(attrib), 5(%edx) ; \ 268 movb %bh, 7(%edx) 269 270 APM_SETUP_GDT(APM_INIT_CS_INDEX , CS32_ATTRIB) 271 APM_SETUP_GDT(APM_INIT_DS_INDEX , DS32_ATTRIB) 272 APM_SETUP_GDT(APM_INIT_CS16_INDEX, CS16_ATTRIB) 273 274 /* 275 * Call the initializer: 276 * 277 * direct intersegment call to conventional memory code 278 */ 279 .byte 0x9a /* actually, lcall $APM_INIT_CS_SEL, $0 */ 280 .long 0 281 .word APM_INIT_CS_SEL 282 283 movw %ax, _apm_version-KERNBASE 284 movl %ebx, _apm_cs_entry-KERNBASE 285 movw %cx, _apm_cs32_base-KERNBASE 286 shrl $16, %ecx 287 movw %cx, _apm_cs16_base-KERNBASE 288 movw %dx, _apm_ds_base-KERNBASE 289 movw %si, _apm_cs_limit-KERNBASE 290 shrl $16, %esi 291 movw %si, _apm_ds_limit-KERNBASE 292 movw %di, _apm_flags-KERNBASE 293#endif /* APM */ 294 |
|
| 199 /* Find out our CPU type. */ 200 201 /* Try to toggle alignment check flag; does not exist on 386. */ 202 pushfl 203 popl %eax 204 movl %eax,%ecx 205 orl $PSL_AC,%eax 206 pushl %eax --- 406 unchanged lines hidden --- | 295 /* Find out our CPU type. */ 296 297 /* Try to toggle alignment check flag; does not exist on 386. */ 298 pushfl 299 popl %eax 300 movl %eax,%ecx 301 orl $PSL_AC,%eax 302 pushl %eax --- 406 unchanged lines hidden --- |