2 * i386 helpers (without register variable usage)
4 * Copyright (c) 2003 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
35 #include <linux/unistd.h>
36 #include <linux/version.h>
38 _syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
40 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 66)
41 #define modify_ldt_ldt_s user_desc
43 #endif /* USE_CODE_COPY */
45 CPUX86State *cpu_x86_init(void)
50 env = qemu_mallocz(sizeof(CPUX86State));
55 /* init various static tables */
58 optimize_flags_init();
61 /* testing code for code copy case */
63 struct modify_ldt_ldt_s ldt;
66 ldt.base_addr = (unsigned long)env;
67 ldt.limit = (sizeof(CPUState) + 0xfff) >> 12;
69 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
70 ldt.read_exec_only = 0;
71 ldt.limit_in_pages = 1;
72 ldt.seg_not_present = 0;
74 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
76 asm volatile ("movl %0, %%fs" : : "r" ((1 << 3) | 7));
80 int family, model, stepping;
82 env->cpuid_vendor1 = 0x68747541; /* "Auth" */
83 env->cpuid_vendor2 = 0x69746e65; /* "enti" */
84 env->cpuid_vendor3 = 0x444d4163; /* "cAMD" */
89 env->cpuid_vendor1 = 0x756e6547; /* "Genu" */
90 env->cpuid_vendor2 = 0x49656e69; /* "ineI" */
91 env->cpuid_vendor3 = 0x6c65746e; /* "ntel" */
104 env->cpuid_level = 2;
105 env->cpuid_version = (family << 8) | (model << 4) | stepping;
106 env->cpuid_features = (CPUID_FP87 | CPUID_DE | CPUID_PSE |
107 CPUID_TSC | CPUID_MSR | CPUID_MCE |
108 CPUID_CX8 | CPUID_PGE | CPUID_CMOV |
110 env->pat = 0x0007040600070406ULL;
111 env->cpuid_ext_features = 0;
112 env->cpuid_features |= CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | CPUID_PAE | CPUID_SEP;
113 env->cpuid_xlevel = 0;
115 const char *model_id = "QEMU Virtual CPU version " QEMU_VERSION;
117 len = strlen(model_id);
118 for(i = 0; i < 48; i++) {
123 env->cpuid_model[i >> 2] |= c << (8 * (i & 3));
127 /* currently not enabled for std i386 because not fully tested */
128 env->cpuid_features |= CPUID_APIC;
129 env->cpuid_ext2_features = (env->cpuid_features & 0x0183F3FF);
130 env->cpuid_ext2_features |= CPUID_EXT2_LM | CPUID_EXT2_SYSCALL;
131 env->cpuid_xlevel = 0x80000008;
133 /* these features are needed for Win64 and aren't fully implemented */
134 env->cpuid_features |= CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA;
144 /* NOTE: must be called outside the CPU execute loop */
145 void cpu_reset(CPUX86State *env)
149 memset(env, 0, offsetof(CPUX86State, breakpoints));
153 /* init to reset state */
155 #ifdef CONFIG_SOFTMMU
156 env->hflags |= HF_SOFTMMU_MASK;
159 cpu_x86_update_cr0(env, 0x60000010);
160 env->a20_mask = 0xffffffff;
162 env->idt.limit = 0xffff;
163 env->gdt.limit = 0xffff;
164 env->ldt.limit = 0xffff;
165 env->ldt.flags = DESC_P_MASK;
166 env->tr.limit = 0xffff;
167 env->tr.flags = DESC_P_MASK;
169 cpu_x86_load_seg_cache(env, R_CS, 0xf000, 0xffff0000, 0xffff, 0);
170 cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffff, 0);
171 cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffff, 0);
172 cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffff, 0);
173 cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffff, 0);
174 cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffff, 0);
177 env->regs[R_EDX] = 0x600; /* indicate P6 processor */
182 for(i = 0;i < 8; i++)
189 void cpu_x86_close(CPUX86State *env)
194 /***********************************************************/
197 static const char *cc_op_str[] = {
252 void cpu_dump_state(CPUState *env, FILE *f,
253 int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
258 static const char *seg_name[6] = { "ES", "CS", "SS", "DS", "FS", "GS" };
260 eflags = env->eflags;
262 if (env->hflags & HF_CS64_MASK) {
264 "RAX=%016llx RBX=%016llx RCX=%016llx RDX=%016llx\n"
265 "RSI=%016llx RDI=%016llx RBP=%016llx RSP=%016llx\n"
266 "R8 =%016llx R9 =%016llx R10=%016llx R11=%016llx\n"
267 "R12=%016llx R13=%016llx R14=%016llx R15=%016llx\n"
268 "RIP=%016llx RFL=%08x [%c%c%c%c%c%c%c] CPL=%d II=%d A20=%d HLT=%d\n",
286 eflags & DF_MASK ? 'D' : '-',
287 eflags & CC_O ? 'O' : '-',
288 eflags & CC_S ? 'S' : '-',
289 eflags & CC_Z ? 'Z' : '-',
290 eflags & CC_A ? 'A' : '-',
291 eflags & CC_P ? 'P' : '-',
292 eflags & CC_C ? 'C' : '-',
293 env->hflags & HF_CPL_MASK,
294 (env->hflags >> HF_INHIBIT_IRQ_SHIFT) & 1,
295 (env->a20_mask >> 20) & 1,
296 (env->hflags >> HF_HALTED_SHIFT) & 1);
300 cpu_fprintf(f, "EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n"
301 "ESI=%08x EDI=%08x EBP=%08x ESP=%08x\n"
302 "EIP=%08x EFL=%08x [%c%c%c%c%c%c%c] CPL=%d II=%d A20=%d HLT=%d\n",
303 (uint32_t)env->regs[R_EAX],
304 (uint32_t)env->regs[R_EBX],
305 (uint32_t)env->regs[R_ECX],
306 (uint32_t)env->regs[R_EDX],
307 (uint32_t)env->regs[R_ESI],
308 (uint32_t)env->regs[R_EDI],
309 (uint32_t)env->regs[R_EBP],
310 (uint32_t)env->regs[R_ESP],
311 (uint32_t)env->eip, eflags,
312 eflags & DF_MASK ? 'D' : '-',
313 eflags & CC_O ? 'O' : '-',
314 eflags & CC_S ? 'S' : '-',
315 eflags & CC_Z ? 'Z' : '-',
316 eflags & CC_A ? 'A' : '-',
317 eflags & CC_P ? 'P' : '-',
318 eflags & CC_C ? 'C' : '-',
319 env->hflags & HF_CPL_MASK,
320 (env->hflags >> HF_INHIBIT_IRQ_SHIFT) & 1,
321 (env->a20_mask >> 20) & 1,
322 (env->hflags >> HF_HALTED_SHIFT) & 1);
326 if (env->hflags & HF_LMA_MASK) {
327 for(i = 0; i < 6; i++) {
328 SegmentCache *sc = &env->segs[i];
329 cpu_fprintf(f, "%s =%04x %016llx %08x %08x\n",
336 cpu_fprintf(f, "LDT=%04x %016llx %08x %08x\n",
341 cpu_fprintf(f, "TR =%04x %016llx %08x %08x\n",
346 cpu_fprintf(f, "GDT= %016llx %08x\n",
347 env->gdt.base, env->gdt.limit);
348 cpu_fprintf(f, "IDT= %016llx %08x\n",
349 env->idt.base, env->idt.limit);
350 cpu_fprintf(f, "CR0=%08x CR2=%016llx CR3=%016llx CR4=%08x\n",
351 (uint32_t)env->cr[0],
354 (uint32_t)env->cr[4]);
358 for(i = 0; i < 6; i++) {
359 SegmentCache *sc = &env->segs[i];
360 cpu_fprintf(f, "%s =%04x %08x %08x %08x\n",
367 cpu_fprintf(f, "LDT=%04x %08x %08x %08x\n",
369 (uint32_t)env->ldt.base,
372 cpu_fprintf(f, "TR =%04x %08x %08x %08x\n",
374 (uint32_t)env->tr.base,
377 cpu_fprintf(f, "GDT= %08x %08x\n",
378 (uint32_t)env->gdt.base, env->gdt.limit);
379 cpu_fprintf(f, "IDT= %08x %08x\n",
380 (uint32_t)env->idt.base, env->idt.limit);
381 cpu_fprintf(f, "CR0=%08x CR2=%08x CR3=%08x CR4=%08x\n",
382 (uint32_t)env->cr[0],
383 (uint32_t)env->cr[2],
384 (uint32_t)env->cr[3],
385 (uint32_t)env->cr[4]);
387 if (flags & X86_DUMP_CCOP) {
388 if ((unsigned)env->cc_op < CC_OP_NB)
389 snprintf(cc_op_name, sizeof(cc_op_name), "%s", cc_op_str[env->cc_op]);
391 snprintf(cc_op_name, sizeof(cc_op_name), "[%d]", env->cc_op);
393 if (env->hflags & HF_CS64_MASK) {
394 cpu_fprintf(f, "CCS=%016llx CCD=%016llx CCO=%-8s\n",
395 env->cc_src, env->cc_dst,
400 cpu_fprintf(f, "CCS=%08x CCD=%08x CCO=%-8s\n",
401 (uint32_t)env->cc_src, (uint32_t)env->cc_dst,
405 if (flags & X86_DUMP_FPU) {
408 for(i = 0; i < 8; i++) {
409 fptag |= ((!env->fptags[i]) << i);
411 cpu_fprintf(f, "FCW=%04x FSW=%04x [ST=%d] FTW=%02x MXCSR=%08x\n",
413 (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11,
418 #if defined(USE_X86LDOUBLE)
426 tmp.d = env->fpregs[i].d;
427 cpu_fprintf(f, "FPR%d=%016llx %04x",
428 i, tmp.l.lower, tmp.l.upper);
430 cpu_fprintf(f, "FPR%d=%016llx",
431 i, env->fpregs[i].mmx.q);
434 cpu_fprintf(f, "\n");
438 if (env->hflags & HF_CS64_MASK)
443 cpu_fprintf(f, "XMM%02d=%08x%08x%08x%08x",
445 env->xmm_regs[i].XMM_L(3),
446 env->xmm_regs[i].XMM_L(2),
447 env->xmm_regs[i].XMM_L(1),
448 env->xmm_regs[i].XMM_L(0));
450 cpu_fprintf(f, "\n");
457 /***********************************************************/
459 /* XXX: add PGE support */
461 void cpu_x86_set_a20(CPUX86State *env, int a20_state)
463 a20_state = (a20_state != 0);
464 if (a20_state != ((env->a20_mask >> 20) & 1)) {
465 #if defined(DEBUG_MMU)
466 printf("A20 update: a20=%d\n", a20_state);
468 /* if the cpu is currently executing code, we must unlink it and
469 all the potentially executing TB */
470 cpu_interrupt(env, CPU_INTERRUPT_EXITTB);
472 /* when a20 is changed, all the MMU mappings are invalid, so
473 we must flush everything */
475 env->a20_mask = 0xffefffff | (a20_state << 20);
479 void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0)
483 #if defined(DEBUG_MMU)
484 printf("CR0 update: CR0=0x%08x\n", new_cr0);
486 if ((new_cr0 & (CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK)) !=
487 (env->cr[0] & (CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK))) {
492 if (!(env->cr[0] & CR0_PG_MASK) && (new_cr0 & CR0_PG_MASK) &&
493 (env->efer & MSR_EFER_LME)) {
494 /* enter in long mode */
495 /* XXX: generate an exception */
496 if (!(env->cr[4] & CR4_PAE_MASK))
498 env->efer |= MSR_EFER_LMA;
499 env->hflags |= HF_LMA_MASK;
500 } else if ((env->cr[0] & CR0_PG_MASK) && !(new_cr0 & CR0_PG_MASK) &&
501 (env->efer & MSR_EFER_LMA)) {
503 env->efer &= ~MSR_EFER_LMA;
504 env->hflags &= ~(HF_LMA_MASK | HF_CS64_MASK);
505 env->eip &= 0xffffffff;
508 env->cr[0] = new_cr0 | CR0_ET_MASK;
510 /* update PE flag in hidden flags */
511 pe_state = (env->cr[0] & CR0_PE_MASK);
512 env->hflags = (env->hflags & ~HF_PE_MASK) | (pe_state << HF_PE_SHIFT);
513 /* ensure that ADDSEG is always set in real mode */
514 env->hflags |= ((pe_state ^ 1) << HF_ADDSEG_SHIFT);
515 /* update FPU flags */
516 env->hflags = (env->hflags & ~(HF_MP_MASK | HF_EM_MASK | HF_TS_MASK)) |
517 ((new_cr0 << (HF_MP_SHIFT - 1)) & (HF_MP_MASK | HF_EM_MASK | HF_TS_MASK));
520 /* XXX: in legacy PAE mode, generate a GPF if reserved bits are set in
522 void cpu_x86_update_cr3(CPUX86State *env, target_ulong new_cr3)
524 env->cr[3] = new_cr3;
525 if (env->cr[0] & CR0_PG_MASK) {
526 #if defined(DEBUG_MMU)
527 printf("CR3 update: CR3=" TARGET_FMT_lx "\n", new_cr3);
533 void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4)
535 #if defined(DEBUG_MMU)
536 printf("CR4 update: CR4=%08x\n", (uint32_t)env->cr[4]);
538 if ((new_cr4 & (CR4_PGE_MASK | CR4_PAE_MASK | CR4_PSE_MASK)) !=
539 (env->cr[4] & (CR4_PGE_MASK | CR4_PAE_MASK | CR4_PSE_MASK))) {
543 if (!(env->cpuid_features & CPUID_SSE))
544 new_cr4 &= ~CR4_OSFXSR_MASK;
545 if (new_cr4 & CR4_OSFXSR_MASK)
546 env->hflags |= HF_OSFXSR_MASK;
548 env->hflags &= ~HF_OSFXSR_MASK;
550 env->cr[4] = new_cr4;
553 /* XXX: also flush 4MB pages */
554 void cpu_x86_flush_tlb(CPUX86State *env, target_ulong addr)
556 tlb_flush_page(env, addr);
559 #if defined(CONFIG_USER_ONLY)
561 int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,
562 int is_write, int is_user, int is_softmmu)
564 /* user mode only emulation */
567 env->error_code = (is_write << PG_ERROR_W_BIT);
568 env->error_code |= PG_ERROR_U_MASK;
572 target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
580 -1 = cannot handle fault
581 0 = nothing more to do
582 1 = generate PF fault
583 2 = soft MMU activation required for this block
585 int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,
586 int is_write, int is_user, int is_softmmu)
588 uint32_t pdpe_addr, pde_addr, pte_addr;
589 uint32_t pde, pte, ptep, pdpe;
590 int error_code, is_dirty, prot, page_size, ret;
591 unsigned long paddr, page_offset;
592 target_ulong vaddr, virt_addr;
594 #if defined(DEBUG_MMU)
595 printf("MMU fault: addr=" TARGET_FMT_lx " w=%d u=%d eip=" TARGET_FMT_lx "\n",
596 addr, is_write, is_user, env->eip);
600 if (!(env->cr[0] & CR0_PG_MASK)) {
602 virt_addr = addr & TARGET_PAGE_MASK;
603 prot = PAGE_READ | PAGE_WRITE;
608 if (env->cr[4] & CR4_PAE_MASK) {
609 /* XXX: we only use 32 bit physical addresses */
611 if (env->hflags & HF_LMA_MASK) {
612 uint32_t pml4e_addr, pml4e;
615 /* XXX: handle user + rw rights */
616 /* XXX: handle NX flag */
617 /* test virtual address sign extension */
618 sext = (int64_t)addr >> 47;
619 if (sext != 0 && sext != -1) {
624 pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) &
626 pml4e = ldl_phys(pml4e_addr);
627 if (!(pml4e & PG_PRESENT_MASK)) {
631 if (!(pml4e & PG_ACCESSED_MASK)) {
632 pml4e |= PG_ACCESSED_MASK;
633 stl_phys_notdirty(pml4e_addr, pml4e);
636 pdpe_addr = ((pml4e & ~0xfff) + (((addr >> 30) & 0x1ff) << 3)) &
638 pdpe = ldl_phys(pdpe_addr);
639 if (!(pdpe & PG_PRESENT_MASK)) {
643 if (!(pdpe & PG_ACCESSED_MASK)) {
644 pdpe |= PG_ACCESSED_MASK;
645 stl_phys_notdirty(pdpe_addr, pdpe);
650 pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 30) << 3)) &
652 pdpe = ldl_phys(pdpe_addr);
653 if (!(pdpe & PG_PRESENT_MASK)) {
659 pde_addr = ((pdpe & ~0xfff) + (((addr >> 21) & 0x1ff) << 3)) &
661 pde = ldl_phys(pde_addr);
662 if (!(pde & PG_PRESENT_MASK)) {
666 if (pde & PG_PSE_MASK) {
668 page_size = 2048 * 1024;
669 goto handle_big_page;
672 if (!(pde & PG_ACCESSED_MASK)) {
673 pde |= PG_ACCESSED_MASK;
674 stl_phys_notdirty(pde_addr, pde);
676 pte_addr = ((pde & ~0xfff) + (((addr >> 12) & 0x1ff) << 3)) &
681 /* page directory entry */
682 pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & ~3)) &
684 pde = ldl_phys(pde_addr);
685 if (!(pde & PG_PRESENT_MASK)) {
689 /* if PSE bit is set, then we use a 4MB page */
690 if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
691 page_size = 4096 * 1024;
694 if (!(pde & PG_USER_MASK))
695 goto do_fault_protect;
696 if (is_write && !(pde & PG_RW_MASK))
697 goto do_fault_protect;
699 if ((env->cr[0] & CR0_WP_MASK) &&
700 is_write && !(pde & PG_RW_MASK))
701 goto do_fault_protect;
703 is_dirty = is_write && !(pde & PG_DIRTY_MASK);
704 if (!(pde & PG_ACCESSED_MASK) || is_dirty) {
705 pde |= PG_ACCESSED_MASK;
707 pde |= PG_DIRTY_MASK;
708 stl_phys_notdirty(pde_addr, pde);
711 pte = pde & ~( (page_size - 1) & ~0xfff); /* align to page_size */
713 virt_addr = addr & ~(page_size - 1);
715 if (!(pde & PG_ACCESSED_MASK)) {
716 pde |= PG_ACCESSED_MASK;
717 stl_phys_notdirty(pde_addr, pde);
720 /* page directory entry */
721 pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) &
724 pte = ldl_phys(pte_addr);
725 if (!(pte & PG_PRESENT_MASK)) {
729 /* combine pde and pte user and rw protections */
732 if (!(ptep & PG_USER_MASK))
733 goto do_fault_protect;
734 if (is_write && !(ptep & PG_RW_MASK))
735 goto do_fault_protect;
737 if ((env->cr[0] & CR0_WP_MASK) &&
738 is_write && !(ptep & PG_RW_MASK))
739 goto do_fault_protect;
741 is_dirty = is_write && !(pte & PG_DIRTY_MASK);
742 if (!(pte & PG_ACCESSED_MASK) || is_dirty) {
743 pte |= PG_ACCESSED_MASK;
745 pte |= PG_DIRTY_MASK;
746 stl_phys_notdirty(pte_addr, pte);
749 virt_addr = addr & ~0xfff;
752 /* the page can be put in the TLB */
754 if (pte & PG_DIRTY_MASK) {
755 /* only set write access if already dirty... otherwise wait
758 if (ptep & PG_RW_MASK)
761 if (!(env->cr[0] & CR0_WP_MASK) ||
768 pte = pte & env->a20_mask;
770 /* Even if 4MB pages, we map only one 4KB page in the cache to
771 avoid filling it too fast */
772 page_offset = (addr & TARGET_PAGE_MASK) & (page_size - 1);
773 paddr = (pte & TARGET_PAGE_MASK) + page_offset;
774 vaddr = virt_addr + page_offset;
776 ret = tlb_set_page(env, vaddr, paddr, prot, is_user, is_softmmu);
779 error_code = PG_ERROR_P_MASK;
782 env->error_code = (is_write << PG_ERROR_W_BIT) | error_code;
784 env->error_code |= PG_ERROR_U_MASK;
788 target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
790 uint32_t pde_addr, pte_addr;
791 uint32_t pde, pte, paddr, page_offset, page_size;
793 if (env->cr[4] & CR4_PAE_MASK) {
794 uint32_t pdpe_addr, pde_addr, pte_addr;
797 /* XXX: we only use 32 bit physical addresses */
799 if (env->hflags & HF_LMA_MASK) {
800 uint32_t pml4e_addr, pml4e;
803 /* test virtual address sign extension */
804 sext = (int64_t)addr >> 47;
805 if (sext != 0 && sext != -1)
808 pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) &
810 pml4e = ldl_phys(pml4e_addr);
811 if (!(pml4e & PG_PRESENT_MASK))
814 pdpe_addr = ((pml4e & ~0xfff) + (((addr >> 30) & 0x1ff) << 3)) &
816 pdpe = ldl_phys(pdpe_addr);
817 if (!(pdpe & PG_PRESENT_MASK))
822 pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 30) << 3)) &
824 pdpe = ldl_phys(pdpe_addr);
825 if (!(pdpe & PG_PRESENT_MASK))
829 pde_addr = ((pdpe & ~0xfff) + (((addr >> 21) & 0x1ff) << 3)) &
831 pde = ldl_phys(pde_addr);
832 if (!(pde & PG_PRESENT_MASK)) {
835 if (pde & PG_PSE_MASK) {
837 page_size = 2048 * 1024;
838 pte = pde & ~( (page_size - 1) & ~0xfff); /* align to page_size */
841 pte_addr = ((pde & ~0xfff) + (((addr >> 12) & 0x1ff) << 3)) &
844 pte = ldl_phys(pte_addr);
847 if (!(env->cr[0] & CR0_PG_MASK)) {
851 /* page directory entry */
852 pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & ~3)) & env->a20_mask;
853 pde = ldl_phys(pde_addr);
854 if (!(pde & PG_PRESENT_MASK))
856 if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
857 pte = pde & ~0x003ff000; /* align to 4MB */
858 page_size = 4096 * 1024;
860 /* page directory entry */
861 pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & env->a20_mask;
862 pte = ldl_phys(pte_addr);
863 if (!(pte & PG_PRESENT_MASK))
868 pte = pte & env->a20_mask;
871 page_offset = (addr & TARGET_PAGE_MASK) & (page_size - 1);
872 paddr = (pte & TARGET_PAGE_MASK) + page_offset;
875 #endif /* !CONFIG_USER_ONLY */
877 #if defined(USE_CODE_COPY)
890 uint8_t fpregs1[8 * 10];
893 void restore_native_fp_state(CPUState *env)
896 struct fpstate fp1, *fp = &fp1;
898 fp->fpuc = env->fpuc;
899 fp->fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
901 for (i=7; i>=0; i--) {
903 if (env->fptags[i]) {
906 /* the FPU automatically computes it */
911 for(i = 0;i < 8; i++) {
912 memcpy(&fp->fpregs1[i * 10], &env->fpregs[j].d, 10);
915 asm volatile ("frstor %0" : "=m" (*fp));
916 env->native_fp_regs = 1;
919 void save_native_fp_state(CPUState *env)
923 struct fpstate fp1, *fp = &fp1;
925 asm volatile ("fsave %0" : : "m" (*fp));
926 env->fpuc = fp->fpuc;
927 env->fpstt = (fp->fpus >> 11) & 7;
928 env->fpus = fp->fpus & ~0x3800;
930 for(i = 0;i < 8; i++) {
931 env->fptags[i] = ((fptag & 3) == 3);
935 for(i = 0;i < 8; i++) {
936 memcpy(&env->fpregs[j].d, &fp->fpregs1[i * 10], 10);
939 /* we must restore the default rounding state */
940 /* XXX: we do not restore the exception state */
941 fpuc = 0x037f | (env->fpuc & (3 << 10));
942 asm volatile("fldcw %0" : : "m" (fpuc));
943 env->native_fp_regs = 0;