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, see <http://www.gnu.org/licenses/>.
28 #include "qemu-common.h"
33 /* NOTE: must be called outside the CPU execute loop */
34 void cpu_reset(CPUX86State *env)
38 if (qemu_loglevel_mask(CPU_LOG_RESET)) {
39 qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
40 log_cpu_state(env, X86_DUMP_FPU | X86_DUMP_CCOP);
43 memset(env, 0, offsetof(CPUX86State, breakpoints));
47 env->old_exception = -1;
49 /* init to reset state */
52 env->hflags |= HF_SOFTMMU_MASK;
54 env->hflags2 |= HF2_GIF_MASK;
56 cpu_x86_update_cr0(env, 0x60000010);
58 env->smbase = 0x30000;
60 env->idt.limit = 0xffff;
61 env->gdt.limit = 0xffff;
62 env->ldt.limit = 0xffff;
63 env->ldt.flags = DESC_P_MASK | (2 << DESC_TYPE_SHIFT);
64 env->tr.limit = 0xffff;
65 env->tr.flags = DESC_P_MASK | (11 << DESC_TYPE_SHIFT);
67 cpu_x86_load_seg_cache(env, R_CS, 0xf000, 0xffff0000, 0xffff,
68 DESC_P_MASK | DESC_S_MASK | DESC_CS_MASK |
69 DESC_R_MASK | DESC_A_MASK);
70 cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffff,
71 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
73 cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffff,
74 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
76 cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffff,
77 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
79 cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffff,
80 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
82 cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffff,
83 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
87 env->regs[R_EDX] = env->cpuid_version;
98 memset(env->dr, 0, sizeof(env->dr));
99 env->dr[6] = DR6_FIXED_1;
100 env->dr[7] = DR7_FIXED_1;
101 cpu_breakpoint_remove_all(env, BP_CPU);
102 cpu_watchpoint_remove_all(env, BP_CPU);
107 void cpu_x86_close(CPUX86State *env)
112 /***********************************************************/
115 static const char *cc_op_str[] = {
171 cpu_x86_dump_seg_cache(CPUState *env, FILE *f,
172 int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
173 const char *name, struct SegmentCache *sc)
176 if (env->hflags & HF_CS64_MASK) {
177 cpu_fprintf(f, "%-3s=%04x %016" PRIx64 " %08x %08x", name,
178 sc->selector, sc->base, sc->limit, sc->flags);
182 cpu_fprintf(f, "%-3s=%04x %08x %08x %08x", name, sc->selector,
183 (uint32_t)sc->base, sc->limit, sc->flags);
186 if (!(env->hflags & HF_PE_MASK) || !(sc->flags & DESC_P_MASK))
189 cpu_fprintf(f, " DPL=%d ", (sc->flags & DESC_DPL_MASK) >> DESC_DPL_SHIFT);
190 if (sc->flags & DESC_S_MASK) {
191 if (sc->flags & DESC_CS_MASK) {
192 cpu_fprintf(f, (sc->flags & DESC_L_MASK) ? "CS64" :
193 ((sc->flags & DESC_B_MASK) ? "CS32" : "CS16"));
194 cpu_fprintf(f, " [%c%c", (sc->flags & DESC_C_MASK) ? 'C' : '-',
195 (sc->flags & DESC_R_MASK) ? 'R' : '-');
197 cpu_fprintf(f, (sc->flags & DESC_B_MASK) ? "DS " : "DS16");
198 cpu_fprintf(f, " [%c%c", (sc->flags & DESC_E_MASK) ? 'E' : '-',
199 (sc->flags & DESC_W_MASK) ? 'W' : '-');
201 cpu_fprintf(f, "%c]", (sc->flags & DESC_A_MASK) ? 'A' : '-');
203 static const char *sys_type_name[2][16] = {
205 "Reserved", "TSS16-avl", "LDT", "TSS16-busy",
206 "CallGate16", "TaskGate", "IntGate16", "TrapGate16",
207 "Reserved", "TSS32-avl", "Reserved", "TSS32-busy",
208 "CallGate32", "Reserved", "IntGate32", "TrapGate32"
211 "<hiword>", "Reserved", "LDT", "Reserved", "Reserved",
212 "Reserved", "Reserved", "Reserved", "Reserved",
213 "TSS64-avl", "Reserved", "TSS64-busy", "CallGate64",
214 "Reserved", "IntGate64", "TrapGate64"
218 sys_type_name[(env->hflags & HF_LMA_MASK) ? 1 : 0]
219 [(sc->flags & DESC_TYPE_MASK)
220 >> DESC_TYPE_SHIFT]);
223 cpu_fprintf(f, "\n");
226 void cpu_dump_state(CPUState *env, FILE *f,
227 int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
232 static const char *seg_name[6] = { "ES", "CS", "SS", "DS", "FS", "GS" };
234 cpu_synchronize_state(env);
236 eflags = env->eflags;
238 if (env->hflags & HF_CS64_MASK) {
240 "RAX=%016" PRIx64 " RBX=%016" PRIx64 " RCX=%016" PRIx64 " RDX=%016" PRIx64 "\n"
241 "RSI=%016" PRIx64 " RDI=%016" PRIx64 " RBP=%016" PRIx64 " RSP=%016" PRIx64 "\n"
242 "R8 =%016" PRIx64 " R9 =%016" PRIx64 " R10=%016" PRIx64 " R11=%016" PRIx64 "\n"
243 "R12=%016" PRIx64 " R13=%016" PRIx64 " R14=%016" PRIx64 " R15=%016" PRIx64 "\n"
244 "RIP=%016" PRIx64 " RFL=%08x [%c%c%c%c%c%c%c] CPL=%d II=%d A20=%d SMM=%d HLT=%d\n",
262 eflags & DF_MASK ? 'D' : '-',
263 eflags & CC_O ? 'O' : '-',
264 eflags & CC_S ? 'S' : '-',
265 eflags & CC_Z ? 'Z' : '-',
266 eflags & CC_A ? 'A' : '-',
267 eflags & CC_P ? 'P' : '-',
268 eflags & CC_C ? 'C' : '-',
269 env->hflags & HF_CPL_MASK,
270 (env->hflags >> HF_INHIBIT_IRQ_SHIFT) & 1,
271 (env->a20_mask >> 20) & 1,
272 (env->hflags >> HF_SMM_SHIFT) & 1,
277 cpu_fprintf(f, "EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n"
278 "ESI=%08x EDI=%08x EBP=%08x ESP=%08x\n"
279 "EIP=%08x EFL=%08x [%c%c%c%c%c%c%c] CPL=%d II=%d A20=%d SMM=%d HLT=%d\n",
280 (uint32_t)env->regs[R_EAX],
281 (uint32_t)env->regs[R_EBX],
282 (uint32_t)env->regs[R_ECX],
283 (uint32_t)env->regs[R_EDX],
284 (uint32_t)env->regs[R_ESI],
285 (uint32_t)env->regs[R_EDI],
286 (uint32_t)env->regs[R_EBP],
287 (uint32_t)env->regs[R_ESP],
288 (uint32_t)env->eip, eflags,
289 eflags & DF_MASK ? 'D' : '-',
290 eflags & CC_O ? 'O' : '-',
291 eflags & CC_S ? 'S' : '-',
292 eflags & CC_Z ? 'Z' : '-',
293 eflags & CC_A ? 'A' : '-',
294 eflags & CC_P ? 'P' : '-',
295 eflags & CC_C ? 'C' : '-',
296 env->hflags & HF_CPL_MASK,
297 (env->hflags >> HF_INHIBIT_IRQ_SHIFT) & 1,
298 (env->a20_mask >> 20) & 1,
299 (env->hflags >> HF_SMM_SHIFT) & 1,
303 for(i = 0; i < 6; i++) {
304 cpu_x86_dump_seg_cache(env, f, cpu_fprintf, seg_name[i],
307 cpu_x86_dump_seg_cache(env, f, cpu_fprintf, "LDT", &env->ldt);
308 cpu_x86_dump_seg_cache(env, f, cpu_fprintf, "TR", &env->tr);
311 if (env->hflags & HF_LMA_MASK) {
312 cpu_fprintf(f, "GDT= %016" PRIx64 " %08x\n",
313 env->gdt.base, env->gdt.limit);
314 cpu_fprintf(f, "IDT= %016" PRIx64 " %08x\n",
315 env->idt.base, env->idt.limit);
316 cpu_fprintf(f, "CR0=%08x CR2=%016" PRIx64 " CR3=%016" PRIx64 " CR4=%08x\n",
317 (uint32_t)env->cr[0],
320 (uint32_t)env->cr[4]);
321 for(i = 0; i < 4; i++)
322 cpu_fprintf(f, "DR%d=%016" PRIx64 " ", i, env->dr[i]);
323 cpu_fprintf(f, "\nDR6=%016" PRIx64 " DR7=%016" PRIx64 "\n",
324 env->dr[6], env->dr[7]);
328 cpu_fprintf(f, "GDT= %08x %08x\n",
329 (uint32_t)env->gdt.base, env->gdt.limit);
330 cpu_fprintf(f, "IDT= %08x %08x\n",
331 (uint32_t)env->idt.base, env->idt.limit);
332 cpu_fprintf(f, "CR0=%08x CR2=%08x CR3=%08x CR4=%08x\n",
333 (uint32_t)env->cr[0],
334 (uint32_t)env->cr[2],
335 (uint32_t)env->cr[3],
336 (uint32_t)env->cr[4]);
337 for(i = 0; i < 4; i++)
338 cpu_fprintf(f, "DR%d=%08x ", i, env->dr[i]);
339 cpu_fprintf(f, "\nDR6=%08x DR7=%08x\n", env->dr[6], env->dr[7]);
341 if (flags & X86_DUMP_CCOP) {
342 if ((unsigned)env->cc_op < CC_OP_NB)
343 snprintf(cc_op_name, sizeof(cc_op_name), "%s", cc_op_str[env->cc_op]);
345 snprintf(cc_op_name, sizeof(cc_op_name), "[%d]", env->cc_op);
347 if (env->hflags & HF_CS64_MASK) {
348 cpu_fprintf(f, "CCS=%016" PRIx64 " CCD=%016" PRIx64 " CCO=%-8s\n",
349 env->cc_src, env->cc_dst,
354 cpu_fprintf(f, "CCS=%08x CCD=%08x CCO=%-8s\n",
355 (uint32_t)env->cc_src, (uint32_t)env->cc_dst,
359 cpu_fprintf(f, "EFER=%016" PRIx64 "\n", env->efer);
360 if (flags & X86_DUMP_FPU) {
363 for(i = 0; i < 8; i++) {
364 fptag |= ((!env->fptags[i]) << i);
366 cpu_fprintf(f, "FCW=%04x FSW=%04x [ST=%d] FTW=%02x MXCSR=%08x\n",
368 (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11,
373 #if defined(USE_X86LDOUBLE)
381 tmp.d = env->fpregs[i].d;
382 cpu_fprintf(f, "FPR%d=%016" PRIx64 " %04x",
383 i, tmp.l.lower, tmp.l.upper);
385 cpu_fprintf(f, "FPR%d=%016" PRIx64,
386 i, env->fpregs[i].mmx.q);
389 cpu_fprintf(f, "\n");
393 if (env->hflags & HF_CS64_MASK)
398 cpu_fprintf(f, "XMM%02d=%08x%08x%08x%08x",
400 env->xmm_regs[i].XMM_L(3),
401 env->xmm_regs[i].XMM_L(2),
402 env->xmm_regs[i].XMM_L(1),
403 env->xmm_regs[i].XMM_L(0));
405 cpu_fprintf(f, "\n");
412 /***********************************************************/
414 /* XXX: add PGE support */
416 void cpu_x86_set_a20(CPUX86State *env, int a20_state)
418 a20_state = (a20_state != 0);
419 if (a20_state != ((env->a20_mask >> 20) & 1)) {
420 #if defined(DEBUG_MMU)
421 printf("A20 update: a20=%d\n", a20_state);
423 /* if the cpu is currently executing code, we must unlink it and
424 all the potentially executing TB */
425 cpu_interrupt(env, CPU_INTERRUPT_EXITTB);
427 /* when a20 is changed, all the MMU mappings are invalid, so
428 we must flush everything */
430 env->a20_mask = ~(1 << 20) | (a20_state << 20);
434 void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0)
438 #if defined(DEBUG_MMU)
439 printf("CR0 update: CR0=0x%08x\n", new_cr0);
441 if ((new_cr0 & (CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK)) !=
442 (env->cr[0] & (CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK))) {
447 if (!(env->cr[0] & CR0_PG_MASK) && (new_cr0 & CR0_PG_MASK) &&
448 (env->efer & MSR_EFER_LME)) {
449 /* enter in long mode */
450 /* XXX: generate an exception */
451 if (!(env->cr[4] & CR4_PAE_MASK))
453 env->efer |= MSR_EFER_LMA;
454 env->hflags |= HF_LMA_MASK;
455 } else if ((env->cr[0] & CR0_PG_MASK) && !(new_cr0 & CR0_PG_MASK) &&
456 (env->efer & MSR_EFER_LMA)) {
458 env->efer &= ~MSR_EFER_LMA;
459 env->hflags &= ~(HF_LMA_MASK | HF_CS64_MASK);
460 env->eip &= 0xffffffff;
463 env->cr[0] = new_cr0 | CR0_ET_MASK;
465 /* update PE flag in hidden flags */
466 pe_state = (env->cr[0] & CR0_PE_MASK);
467 env->hflags = (env->hflags & ~HF_PE_MASK) | (pe_state << HF_PE_SHIFT);
468 /* ensure that ADDSEG is always set in real mode */
469 env->hflags |= ((pe_state ^ 1) << HF_ADDSEG_SHIFT);
470 /* update FPU flags */
471 env->hflags = (env->hflags & ~(HF_MP_MASK | HF_EM_MASK | HF_TS_MASK)) |
472 ((new_cr0 << (HF_MP_SHIFT - 1)) & (HF_MP_MASK | HF_EM_MASK | HF_TS_MASK));
475 /* XXX: in legacy PAE mode, generate a GPF if reserved bits are set in
477 void cpu_x86_update_cr3(CPUX86State *env, target_ulong new_cr3)
479 env->cr[3] = new_cr3;
480 if (env->cr[0] & CR0_PG_MASK) {
481 #if defined(DEBUG_MMU)
482 printf("CR3 update: CR3=" TARGET_FMT_lx "\n", new_cr3);
488 void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4)
490 #if defined(DEBUG_MMU)
491 printf("CR4 update: CR4=%08x\n", (uint32_t)env->cr[4]);
493 if ((new_cr4 & (CR4_PGE_MASK | CR4_PAE_MASK | CR4_PSE_MASK)) !=
494 (env->cr[4] & (CR4_PGE_MASK | CR4_PAE_MASK | CR4_PSE_MASK))) {
498 if (!(env->cpuid_features & CPUID_SSE))
499 new_cr4 &= ~CR4_OSFXSR_MASK;
500 if (new_cr4 & CR4_OSFXSR_MASK)
501 env->hflags |= HF_OSFXSR_MASK;
503 env->hflags &= ~HF_OSFXSR_MASK;
505 env->cr[4] = new_cr4;
508 #if defined(CONFIG_USER_ONLY)
510 int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,
511 int is_write, int mmu_idx, int is_softmmu)
513 /* user mode only emulation */
516 env->error_code = (is_write << PG_ERROR_W_BIT);
517 env->error_code |= PG_ERROR_U_MASK;
518 env->exception_index = EXCP0E_PAGE;
524 /* XXX: This value should match the one returned by CPUID
526 # if defined(TARGET_X86_64)
527 # define PHYS_ADDR_MASK 0xfffffff000LL
529 # define PHYS_ADDR_MASK 0xffffff000LL
533 -1 = cannot handle fault
534 0 = nothing more to do
535 1 = generate PF fault
537 int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,
538 int is_write1, int mmu_idx, int is_softmmu)
541 target_ulong pde_addr, pte_addr;
542 int error_code, is_dirty, prot, page_size, is_write, is_user;
543 target_phys_addr_t paddr;
544 uint32_t page_offset;
545 target_ulong vaddr, virt_addr;
547 is_user = mmu_idx == MMU_USER_IDX;
548 #if defined(DEBUG_MMU)
549 printf("MMU fault: addr=" TARGET_FMT_lx " w=%d u=%d eip=" TARGET_FMT_lx "\n",
550 addr, is_write1, is_user, env->eip);
552 is_write = is_write1 & 1;
554 if (!(env->cr[0] & CR0_PG_MASK)) {
556 virt_addr = addr & TARGET_PAGE_MASK;
557 prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
562 if (env->cr[4] & CR4_PAE_MASK) {
564 target_ulong pdpe_addr;
567 if (env->hflags & HF_LMA_MASK) {
568 uint64_t pml4e_addr, pml4e;
571 /* test virtual address sign extension */
572 sext = (int64_t)addr >> 47;
573 if (sext != 0 && sext != -1) {
575 env->exception_index = EXCP0D_GPF;
579 pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) &
581 pml4e = ldq_phys(pml4e_addr);
582 if (!(pml4e & PG_PRESENT_MASK)) {
586 if (!(env->efer & MSR_EFER_NXE) && (pml4e & PG_NX_MASK)) {
587 error_code = PG_ERROR_RSVD_MASK;
590 if (!(pml4e & PG_ACCESSED_MASK)) {
591 pml4e |= PG_ACCESSED_MASK;
592 stl_phys_notdirty(pml4e_addr, pml4e);
594 ptep = pml4e ^ PG_NX_MASK;
595 pdpe_addr = ((pml4e & PHYS_ADDR_MASK) + (((addr >> 30) & 0x1ff) << 3)) &
597 pdpe = ldq_phys(pdpe_addr);
598 if (!(pdpe & PG_PRESENT_MASK)) {
602 if (!(env->efer & MSR_EFER_NXE) && (pdpe & PG_NX_MASK)) {
603 error_code = PG_ERROR_RSVD_MASK;
606 ptep &= pdpe ^ PG_NX_MASK;
607 if (!(pdpe & PG_ACCESSED_MASK)) {
608 pdpe |= PG_ACCESSED_MASK;
609 stl_phys_notdirty(pdpe_addr, pdpe);
614 /* XXX: load them when cr3 is loaded ? */
615 pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 27) & 0x18)) &
617 pdpe = ldq_phys(pdpe_addr);
618 if (!(pdpe & PG_PRESENT_MASK)) {
622 ptep = PG_NX_MASK | PG_USER_MASK | PG_RW_MASK;
625 pde_addr = ((pdpe & PHYS_ADDR_MASK) + (((addr >> 21) & 0x1ff) << 3)) &
627 pde = ldq_phys(pde_addr);
628 if (!(pde & PG_PRESENT_MASK)) {
632 if (!(env->efer & MSR_EFER_NXE) && (pde & PG_NX_MASK)) {
633 error_code = PG_ERROR_RSVD_MASK;
636 ptep &= pde ^ PG_NX_MASK;
637 if (pde & PG_PSE_MASK) {
639 page_size = 2048 * 1024;
641 if ((ptep & PG_NX_MASK) && is_write1 == 2)
642 goto do_fault_protect;
644 if (!(ptep & PG_USER_MASK))
645 goto do_fault_protect;
646 if (is_write && !(ptep & PG_RW_MASK))
647 goto do_fault_protect;
649 if ((env->cr[0] & CR0_WP_MASK) &&
650 is_write && !(ptep & PG_RW_MASK))
651 goto do_fault_protect;
653 is_dirty = is_write && !(pde & PG_DIRTY_MASK);
654 if (!(pde & PG_ACCESSED_MASK) || is_dirty) {
655 pde |= PG_ACCESSED_MASK;
657 pde |= PG_DIRTY_MASK;
658 stl_phys_notdirty(pde_addr, pde);
660 /* align to page_size */
661 pte = pde & ((PHYS_ADDR_MASK & ~(page_size - 1)) | 0xfff);
662 virt_addr = addr & ~(page_size - 1);
665 if (!(pde & PG_ACCESSED_MASK)) {
666 pde |= PG_ACCESSED_MASK;
667 stl_phys_notdirty(pde_addr, pde);
669 pte_addr = ((pde & PHYS_ADDR_MASK) + (((addr >> 12) & 0x1ff) << 3)) &
671 pte = ldq_phys(pte_addr);
672 if (!(pte & PG_PRESENT_MASK)) {
676 if (!(env->efer & MSR_EFER_NXE) && (pte & PG_NX_MASK)) {
677 error_code = PG_ERROR_RSVD_MASK;
680 /* combine pde and pte nx, user and rw protections */
681 ptep &= pte ^ PG_NX_MASK;
683 if ((ptep & PG_NX_MASK) && is_write1 == 2)
684 goto do_fault_protect;
686 if (!(ptep & PG_USER_MASK))
687 goto do_fault_protect;
688 if (is_write && !(ptep & PG_RW_MASK))
689 goto do_fault_protect;
691 if ((env->cr[0] & CR0_WP_MASK) &&
692 is_write && !(ptep & PG_RW_MASK))
693 goto do_fault_protect;
695 is_dirty = is_write && !(pte & PG_DIRTY_MASK);
696 if (!(pte & PG_ACCESSED_MASK) || is_dirty) {
697 pte |= PG_ACCESSED_MASK;
699 pte |= PG_DIRTY_MASK;
700 stl_phys_notdirty(pte_addr, pte);
703 virt_addr = addr & ~0xfff;
704 pte = pte & (PHYS_ADDR_MASK | 0xfff);
709 /* page directory entry */
710 pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & 0xffc)) &
712 pde = ldl_phys(pde_addr);
713 if (!(pde & PG_PRESENT_MASK)) {
717 /* if PSE bit is set, then we use a 4MB page */
718 if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
719 page_size = 4096 * 1024;
721 if (!(pde & PG_USER_MASK))
722 goto do_fault_protect;
723 if (is_write && !(pde & PG_RW_MASK))
724 goto do_fault_protect;
726 if ((env->cr[0] & CR0_WP_MASK) &&
727 is_write && !(pde & PG_RW_MASK))
728 goto do_fault_protect;
730 is_dirty = is_write && !(pde & PG_DIRTY_MASK);
731 if (!(pde & PG_ACCESSED_MASK) || is_dirty) {
732 pde |= PG_ACCESSED_MASK;
734 pde |= PG_DIRTY_MASK;
735 stl_phys_notdirty(pde_addr, pde);
738 pte = pde & ~( (page_size - 1) & ~0xfff); /* align to page_size */
740 virt_addr = addr & ~(page_size - 1);
742 if (!(pde & PG_ACCESSED_MASK)) {
743 pde |= PG_ACCESSED_MASK;
744 stl_phys_notdirty(pde_addr, pde);
747 /* page directory entry */
748 pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) &
750 pte = ldl_phys(pte_addr);
751 if (!(pte & PG_PRESENT_MASK)) {
755 /* combine pde and pte user and rw protections */
758 if (!(ptep & PG_USER_MASK))
759 goto do_fault_protect;
760 if (is_write && !(ptep & PG_RW_MASK))
761 goto do_fault_protect;
763 if ((env->cr[0] & CR0_WP_MASK) &&
764 is_write && !(ptep & PG_RW_MASK))
765 goto do_fault_protect;
767 is_dirty = is_write && !(pte & PG_DIRTY_MASK);
768 if (!(pte & PG_ACCESSED_MASK) || is_dirty) {
769 pte |= PG_ACCESSED_MASK;
771 pte |= PG_DIRTY_MASK;
772 stl_phys_notdirty(pte_addr, pte);
775 virt_addr = addr & ~0xfff;
778 /* the page can be put in the TLB */
780 if (!(ptep & PG_NX_MASK))
782 if (pte & PG_DIRTY_MASK) {
783 /* only set write access if already dirty... otherwise wait
786 if (ptep & PG_RW_MASK)
789 if (!(env->cr[0] & CR0_WP_MASK) ||
795 pte = pte & env->a20_mask;
797 /* Even if 4MB pages, we map only one 4KB page in the cache to
798 avoid filling it too fast */
799 page_offset = (addr & TARGET_PAGE_MASK) & (page_size - 1);
800 paddr = (pte & TARGET_PAGE_MASK) + page_offset;
801 vaddr = virt_addr + page_offset;
803 tlb_set_page(env, vaddr, paddr, prot, mmu_idx, page_size);
806 error_code = PG_ERROR_P_MASK;
808 error_code |= (is_write << PG_ERROR_W_BIT);
810 error_code |= PG_ERROR_U_MASK;
811 if (is_write1 == 2 &&
812 (env->efer & MSR_EFER_NXE) &&
813 (env->cr[4] & CR4_PAE_MASK))
814 error_code |= PG_ERROR_I_D_MASK;
815 if (env->intercept_exceptions & (1 << EXCP0E_PAGE)) {
816 /* cr2 is not modified in case of exceptions */
817 stq_phys(env->vm_vmcb + offsetof(struct vmcb, control.exit_info_2),
822 env->error_code = error_code;
823 env->exception_index = EXCP0E_PAGE;
827 target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
829 target_ulong pde_addr, pte_addr;
831 target_phys_addr_t paddr;
832 uint32_t page_offset;
835 if (env->cr[4] & CR4_PAE_MASK) {
836 target_ulong pdpe_addr;
840 if (env->hflags & HF_LMA_MASK) {
841 uint64_t pml4e_addr, pml4e;
844 /* test virtual address sign extension */
845 sext = (int64_t)addr >> 47;
846 if (sext != 0 && sext != -1)
849 pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) &
851 pml4e = ldq_phys(pml4e_addr);
852 if (!(pml4e & PG_PRESENT_MASK))
855 pdpe_addr = ((pml4e & ~0xfff) + (((addr >> 30) & 0x1ff) << 3)) &
857 pdpe = ldq_phys(pdpe_addr);
858 if (!(pdpe & PG_PRESENT_MASK))
863 pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 27) & 0x18)) &
865 pdpe = ldq_phys(pdpe_addr);
866 if (!(pdpe & PG_PRESENT_MASK))
870 pde_addr = ((pdpe & ~0xfff) + (((addr >> 21) & 0x1ff) << 3)) &
872 pde = ldq_phys(pde_addr);
873 if (!(pde & PG_PRESENT_MASK)) {
876 if (pde & PG_PSE_MASK) {
878 page_size = 2048 * 1024;
879 pte = pde & ~( (page_size - 1) & ~0xfff); /* align to page_size */
882 pte_addr = ((pde & ~0xfff) + (((addr >> 12) & 0x1ff) << 3)) &
885 pte = ldq_phys(pte_addr);
887 if (!(pte & PG_PRESENT_MASK))
892 if (!(env->cr[0] & CR0_PG_MASK)) {
896 /* page directory entry */
897 pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & 0xffc)) & env->a20_mask;
898 pde = ldl_phys(pde_addr);
899 if (!(pde & PG_PRESENT_MASK))
901 if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
902 pte = pde & ~0x003ff000; /* align to 4MB */
903 page_size = 4096 * 1024;
905 /* page directory entry */
906 pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & env->a20_mask;
907 pte = ldl_phys(pte_addr);
908 if (!(pte & PG_PRESENT_MASK))
913 pte = pte & env->a20_mask;
916 page_offset = (addr & TARGET_PAGE_MASK) & (page_size - 1);
917 paddr = (pte & TARGET_PAGE_MASK) + page_offset;
921 void hw_breakpoint_insert(CPUState *env, int index)
925 switch (hw_breakpoint_type(env->dr[7], index)) {
927 if (hw_breakpoint_enabled(env->dr[7], index))
928 err = cpu_breakpoint_insert(env, env->dr[index], BP_CPU,
929 &env->cpu_breakpoint[index]);
932 type = BP_CPU | BP_MEM_WRITE;
935 /* No support for I/O watchpoints yet */
938 type = BP_CPU | BP_MEM_ACCESS;
940 err = cpu_watchpoint_insert(env, env->dr[index],
941 hw_breakpoint_len(env->dr[7], index),
942 type, &env->cpu_watchpoint[index]);
946 env->cpu_breakpoint[index] = NULL;
949 void hw_breakpoint_remove(CPUState *env, int index)
951 if (!env->cpu_breakpoint[index])
953 switch (hw_breakpoint_type(env->dr[7], index)) {
955 if (hw_breakpoint_enabled(env->dr[7], index))
956 cpu_breakpoint_remove_by_ref(env, env->cpu_breakpoint[index]);
960 cpu_watchpoint_remove_by_ref(env, env->cpu_watchpoint[index]);
963 /* No support for I/O watchpoints yet */
968 int check_hw_breakpoints(CPUState *env, int force_dr6_update)
974 dr6 = env->dr[6] & ~0xf;
975 for (reg = 0; reg < 4; reg++) {
976 type = hw_breakpoint_type(env->dr[7], reg);
977 if ((type == 0 && env->dr[reg] == env->eip) ||
978 ((type & 1) && env->cpu_watchpoint[reg] &&
979 (env->cpu_watchpoint[reg]->flags & BP_WATCHPOINT_HIT))) {
981 if (hw_breakpoint_enabled(env->dr[7], reg))
985 if (hit_enabled || force_dr6_update)
990 static CPUDebugExcpHandler *prev_debug_excp_handler;
992 void raise_exception_env(int exception_index, CPUState *env);
994 static void breakpoint_handler(CPUState *env)
998 if (env->watchpoint_hit) {
999 if (env->watchpoint_hit->flags & BP_CPU) {
1000 env->watchpoint_hit = NULL;
1001 if (check_hw_breakpoints(env, 0))
1002 raise_exception_env(EXCP01_DB, env);
1004 cpu_resume_from_signal(env, NULL);
1007 QTAILQ_FOREACH(bp, &env->breakpoints, entry)
1008 if (bp->pc == env->eip) {
1009 if (bp->flags & BP_CPU) {
1010 check_hw_breakpoints(env, 1);
1011 raise_exception_env(EXCP01_DB, env);
1016 if (prev_debug_excp_handler)
1017 prev_debug_excp_handler(env);
1020 /* This should come from sysemu.h - if we could include it here... */
1021 void qemu_system_reset_request(void);
1023 void cpu_inject_x86_mce(CPUState *cenv, int bank, uint64_t status,
1024 uint64_t mcg_status, uint64_t addr, uint64_t misc)
1026 uint64_t mcg_cap = cenv->mcg_cap;
1027 unsigned bank_num = mcg_cap & 0xff;
1028 uint64_t *banks = cenv->mce_banks;
1030 if (bank >= bank_num || !(status & MCI_STATUS_VAL))
1034 * if MSR_MCG_CTL is not all 1s, the uncorrected error
1035 * reporting is disabled
1037 if ((status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) &&
1038 cenv->mcg_ctl != ~(uint64_t)0)
1042 * if MSR_MCi_CTL is not all 1s, the uncorrected error
1043 * reporting is disabled for the bank
1045 if ((status & MCI_STATUS_UC) && banks[0] != ~(uint64_t)0)
1047 if (status & MCI_STATUS_UC) {
1048 if ((cenv->mcg_status & MCG_STATUS_MCIP) ||
1049 !(cenv->cr[4] & CR4_MCE_MASK)) {
1050 fprintf(stderr, "injects mce exception while previous "
1051 "one is in progress!\n");
1052 qemu_log_mask(CPU_LOG_RESET, "Triple fault\n");
1053 qemu_system_reset_request();
1056 if (banks[1] & MCI_STATUS_VAL)
1057 status |= MCI_STATUS_OVER;
1060 cenv->mcg_status = mcg_status;
1062 cpu_interrupt(cenv, CPU_INTERRUPT_MCE);
1063 } else if (!(banks[1] & MCI_STATUS_VAL)
1064 || !(banks[1] & MCI_STATUS_UC)) {
1065 if (banks[1] & MCI_STATUS_VAL)
1066 status |= MCI_STATUS_OVER;
1071 banks[1] |= MCI_STATUS_OVER;
1073 #endif /* !CONFIG_USER_ONLY */
1075 static void mce_init(CPUX86State *cenv)
1077 unsigned int bank, bank_num;
1079 if (((cenv->cpuid_version >> 8)&0xf) >= 6
1080 && (cenv->cpuid_features&(CPUID_MCE|CPUID_MCA)) == (CPUID_MCE|CPUID_MCA)) {
1081 cenv->mcg_cap = MCE_CAP_DEF | MCE_BANKS_DEF;
1082 cenv->mcg_ctl = ~(uint64_t)0;
1083 bank_num = MCE_BANKS_DEF;
1084 for (bank = 0; bank < bank_num; bank++)
1085 cenv->mce_banks[bank*4] = ~(uint64_t)0;
1089 int cpu_x86_get_descr_debug(CPUX86State *env, unsigned int selector,
1090 target_ulong *base, unsigned int *limit,
1091 unsigned int *flags)
1102 index = selector & ~7;
1103 ptr = dt->base + index;
1104 if ((index + 7) > dt->limit
1105 || cpu_memory_rw_debug(env, ptr, (uint8_t *)&e1, sizeof(e1), 0) != 0
1106 || cpu_memory_rw_debug(env, ptr+4, (uint8_t *)&e2, sizeof(e2), 0) != 0)
1109 *base = ((e1 >> 16) | ((e2 & 0xff) << 16) | (e2 & 0xff000000));
1110 *limit = (e1 & 0xffff) | (e2 & 0x000f0000);
1111 if (e2 & DESC_G_MASK)
1112 *limit = (*limit << 12) | 0xfff;
1118 CPUX86State *cpu_x86_init(const char *cpu_model)
1123 env = qemu_mallocz(sizeof(CPUX86State));
1125 env->cpu_model_str = cpu_model;
1127 /* init various static tables */
1130 optimize_flags_init();
1131 #ifndef CONFIG_USER_ONLY
1132 prev_debug_excp_handler =
1133 cpu_set_debug_excp_handler(breakpoint_handler);
1136 if (cpu_x86_register(env, cpu_model) < 0) {
1142 qemu_init_vcpu(env);
1147 #if !defined(CONFIG_USER_ONLY)
1148 void do_cpu_init(CPUState *env)
1150 int sipi = env->interrupt_request & CPU_INTERRUPT_SIPI;
1152 env->interrupt_request = sipi;
1153 apic_init_reset(env->apic_state);
1154 env->halted = !cpu_is_bsp(env);
1157 void do_cpu_sipi(CPUState *env)
1159 apic_sipi(env->apic_state);
1162 void do_cpu_init(CPUState *env)
1165 void do_cpu_sipi(CPUState *env)