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/>.
21 #include "exec/ioport.h"
24 #if !defined(CONFIG_USER_ONLY)
25 #include "exec/softmmu_exec.h"
26 #endif /* !defined(CONFIG_USER_ONLY) */
28 /* check if Port I/O is allowed in TSS */
29 static inline void check_io(CPUX86State *env, int addr, int size)
31 int io_offset, val, mask;
33 /* TSS must be a valid 32 bit one */
34 if (!(env->tr.flags & DESC_P_MASK) ||
35 ((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 ||
36 env->tr.limit < 103) {
39 io_offset = cpu_lduw_kernel(env, env->tr.base + 0x66);
40 io_offset += (addr >> 3);
41 /* Note: the check needs two bytes */
42 if ((io_offset + 1) > env->tr.limit) {
45 val = cpu_lduw_kernel(env, env->tr.base + io_offset);
47 mask = (1 << size) - 1;
48 /* all bits must be zero to allow the I/O */
49 if ((val & mask) != 0) {
51 raise_exception_err(env, EXCP0D_GPF, 0);
55 void helper_check_iob(CPUX86State *env, uint32_t t0)
60 void helper_check_iow(CPUX86State *env, uint32_t t0)
65 void helper_check_iol(CPUX86State *env, uint32_t t0)
70 void helper_outb(uint32_t port, uint32_t data)
72 cpu_outb(port, data & 0xff);
75 target_ulong helper_inb(uint32_t port)
80 void helper_outw(uint32_t port, uint32_t data)
82 cpu_outw(port, data & 0xffff);
85 target_ulong helper_inw(uint32_t port)
90 void helper_outl(uint32_t port, uint32_t data)
95 target_ulong helper_inl(uint32_t port)
100 void helper_into(CPUX86State *env, int next_eip_addend)
104 eflags = cpu_cc_compute_all(env, CC_OP);
106 raise_interrupt(env, EXCP04_INTO, 1, 0, next_eip_addend);
110 void helper_single_step(CPUX86State *env)
112 #ifndef CONFIG_USER_ONLY
113 check_hw_breakpoints(env, true);
114 env->dr[6] |= DR6_BS;
116 raise_exception(env, EXCP01_DB);
119 void helper_cpuid(CPUX86State *env)
121 uint32_t eax, ebx, ecx, edx;
123 cpu_svm_check_intercept_param(env, SVM_EXIT_CPUID, 0);
125 cpu_x86_cpuid(env, (uint32_t)env->regs[R_EAX], (uint32_t)env->regs[R_ECX], &eax, &ebx, &ecx, &edx);
126 env->regs[R_EAX] = eax;
127 env->regs[R_EBX] = ebx;
128 env->regs[R_ECX] = ecx;
129 env->regs[R_EDX] = edx;
132 #if defined(CONFIG_USER_ONLY)
133 target_ulong helper_read_crN(CPUX86State *env, int reg)
138 void helper_write_crN(CPUX86State *env, int reg, target_ulong t0)
142 void helper_movl_drN_T0(CPUX86State *env, int reg, target_ulong t0)
146 target_ulong helper_read_crN(CPUX86State *env, int reg)
150 cpu_svm_check_intercept_param(env, SVM_EXIT_READ_CR0 + reg, 0);
156 if (!(env->hflags2 & HF2_VINTR_MASK)) {
157 val = cpu_get_apic_tpr(env->apic_state);
166 void helper_write_crN(CPUX86State *env, int reg, target_ulong t0)
168 cpu_svm_check_intercept_param(env, SVM_EXIT_WRITE_CR0 + reg, 0);
171 cpu_x86_update_cr0(env, t0);
174 cpu_x86_update_cr3(env, t0);
177 cpu_x86_update_cr4(env, t0);
180 if (!(env->hflags2 & HF2_VINTR_MASK)) {
181 cpu_set_apic_tpr(env->apic_state, t0);
183 env->v_tpr = t0 & 0x0f;
191 void helper_movl_drN_T0(CPUX86State *env, int reg, target_ulong t0)
196 hw_breakpoint_remove(env, reg);
198 hw_breakpoint_insert(env, reg);
199 } else if (reg == 7) {
200 for (i = 0; i < DR7_MAX_BP; i++) {
201 hw_breakpoint_remove(env, i);
204 for (i = 0; i < DR7_MAX_BP; i++) {
205 hw_breakpoint_insert(env, i);
213 void helper_lmsw(CPUX86State *env, target_ulong t0)
215 /* only 4 lower bits of CR0 are modified. PE cannot be set to zero
216 if already set to one. */
217 t0 = (env->cr[0] & ~0xe) | (t0 & 0xf);
218 helper_write_crN(env, 0, t0);
221 void helper_invlpg(CPUX86State *env, target_ulong addr)
223 cpu_svm_check_intercept_param(env, SVM_EXIT_INVLPG, 0);
224 tlb_flush_page(env, addr);
227 void helper_rdtsc(CPUX86State *env)
231 if ((env->cr[4] & CR4_TSD_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) {
232 raise_exception(env, EXCP0D_GPF);
234 cpu_svm_check_intercept_param(env, SVM_EXIT_RDTSC, 0);
236 val = cpu_get_tsc(env) + env->tsc_offset;
237 env->regs[R_EAX] = (uint32_t)(val);
238 env->regs[R_EDX] = (uint32_t)(val >> 32);
241 void helper_rdtscp(CPUX86State *env)
244 env->regs[R_ECX] = (uint32_t)(env->tsc_aux);
247 void helper_rdpmc(CPUX86State *env)
249 if ((env->cr[4] & CR4_PCE_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) {
250 raise_exception(env, EXCP0D_GPF);
252 cpu_svm_check_intercept_param(env, SVM_EXIT_RDPMC, 0);
254 /* currently unimplemented */
255 qemu_log_mask(LOG_UNIMP, "x86: unimplemented rdpmc\n");
256 raise_exception_err(env, EXCP06_ILLOP, 0);
259 #if defined(CONFIG_USER_ONLY)
260 void helper_wrmsr(CPUX86State *env)
264 void helper_rdmsr(CPUX86State *env)
268 void helper_wrmsr(CPUX86State *env)
272 cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 1);
274 val = ((uint32_t)env->regs[R_EAX]) | ((uint64_t)((uint32_t)env->regs[R_EDX]) << 32);
276 switch ((uint32_t)env->regs[R_ECX]) {
277 case MSR_IA32_SYSENTER_CS:
278 env->sysenter_cs = val & 0xffff;
280 case MSR_IA32_SYSENTER_ESP:
281 env->sysenter_esp = val;
283 case MSR_IA32_SYSENTER_EIP:
284 env->sysenter_eip = val;
286 case MSR_IA32_APICBASE:
287 cpu_set_apic_base(env->apic_state, val);
291 uint64_t update_mask;
294 if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_SYSCALL) {
295 update_mask |= MSR_EFER_SCE;
297 if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) {
298 update_mask |= MSR_EFER_LME;
300 if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_FFXSR) {
301 update_mask |= MSR_EFER_FFXSR;
303 if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_NX) {
304 update_mask |= MSR_EFER_NXE;
306 if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
307 update_mask |= MSR_EFER_SVME;
309 if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_FFXSR) {
310 update_mask |= MSR_EFER_FFXSR;
312 cpu_load_efer(env, (env->efer & ~update_mask) |
313 (val & update_mask));
322 case MSR_VM_HSAVE_PA:
336 env->segs[R_FS].base = val;
339 env->segs[R_GS].base = val;
341 case MSR_KERNELGSBASE:
342 env->kernelgsbase = val;
345 case MSR_MTRRphysBase(0):
346 case MSR_MTRRphysBase(1):
347 case MSR_MTRRphysBase(2):
348 case MSR_MTRRphysBase(3):
349 case MSR_MTRRphysBase(4):
350 case MSR_MTRRphysBase(5):
351 case MSR_MTRRphysBase(6):
352 case MSR_MTRRphysBase(7):
353 env->mtrr_var[((uint32_t)env->regs[R_ECX] - MSR_MTRRphysBase(0)) / 2].base = val;
355 case MSR_MTRRphysMask(0):
356 case MSR_MTRRphysMask(1):
357 case MSR_MTRRphysMask(2):
358 case MSR_MTRRphysMask(3):
359 case MSR_MTRRphysMask(4):
360 case MSR_MTRRphysMask(5):
361 case MSR_MTRRphysMask(6):
362 case MSR_MTRRphysMask(7):
363 env->mtrr_var[((uint32_t)env->regs[R_ECX] - MSR_MTRRphysMask(0)) / 2].mask = val;
365 case MSR_MTRRfix64K_00000:
366 env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - MSR_MTRRfix64K_00000] = val;
368 case MSR_MTRRfix16K_80000:
369 case MSR_MTRRfix16K_A0000:
370 env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - MSR_MTRRfix16K_80000 + 1] = val;
372 case MSR_MTRRfix4K_C0000:
373 case MSR_MTRRfix4K_C8000:
374 case MSR_MTRRfix4K_D0000:
375 case MSR_MTRRfix4K_D8000:
376 case MSR_MTRRfix4K_E0000:
377 case MSR_MTRRfix4K_E8000:
378 case MSR_MTRRfix4K_F0000:
379 case MSR_MTRRfix4K_F8000:
380 env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - MSR_MTRRfix4K_C0000 + 3] = val;
382 case MSR_MTRRdefType:
383 env->mtrr_deftype = val;
386 env->mcg_status = val;
389 if ((env->mcg_cap & MCG_CTL_P)
390 && (val == 0 || val == ~(uint64_t)0)) {
397 case MSR_IA32_MISC_ENABLE:
398 env->msr_ia32_misc_enable = val;
401 if ((uint32_t)env->regs[R_ECX] >= MSR_MC0_CTL
402 && (uint32_t)env->regs[R_ECX] < MSR_MC0_CTL + (4 * env->mcg_cap & 0xff)) {
403 uint32_t offset = (uint32_t)env->regs[R_ECX] - MSR_MC0_CTL;
404 if ((offset & 0x3) != 0
405 || (val == 0 || val == ~(uint64_t)0)) {
406 env->mce_banks[offset] = val;
410 /* XXX: exception? */
415 void helper_rdmsr(CPUX86State *env)
419 cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 0);
421 switch ((uint32_t)env->regs[R_ECX]) {
422 case MSR_IA32_SYSENTER_CS:
423 val = env->sysenter_cs;
425 case MSR_IA32_SYSENTER_ESP:
426 val = env->sysenter_esp;
428 case MSR_IA32_SYSENTER_EIP:
429 val = env->sysenter_eip;
431 case MSR_IA32_APICBASE:
432 val = cpu_get_apic_base(env->apic_state);
443 case MSR_VM_HSAVE_PA:
446 case MSR_IA32_PERF_STATUS:
447 /* tsc_increment_by_tick */
450 val |= (((uint64_t)4ULL) << 40);
463 val = env->segs[R_FS].base;
466 val = env->segs[R_GS].base;
468 case MSR_KERNELGSBASE:
469 val = env->kernelgsbase;
475 case MSR_MTRRphysBase(0):
476 case MSR_MTRRphysBase(1):
477 case MSR_MTRRphysBase(2):
478 case MSR_MTRRphysBase(3):
479 case MSR_MTRRphysBase(4):
480 case MSR_MTRRphysBase(5):
481 case MSR_MTRRphysBase(6):
482 case MSR_MTRRphysBase(7):
483 val = env->mtrr_var[((uint32_t)env->regs[R_ECX] - MSR_MTRRphysBase(0)) / 2].base;
485 case MSR_MTRRphysMask(0):
486 case MSR_MTRRphysMask(1):
487 case MSR_MTRRphysMask(2):
488 case MSR_MTRRphysMask(3):
489 case MSR_MTRRphysMask(4):
490 case MSR_MTRRphysMask(5):
491 case MSR_MTRRphysMask(6):
492 case MSR_MTRRphysMask(7):
493 val = env->mtrr_var[((uint32_t)env->regs[R_ECX] - MSR_MTRRphysMask(0)) / 2].mask;
495 case MSR_MTRRfix64K_00000:
496 val = env->mtrr_fixed[0];
498 case MSR_MTRRfix16K_80000:
499 case MSR_MTRRfix16K_A0000:
500 val = env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - MSR_MTRRfix16K_80000 + 1];
502 case MSR_MTRRfix4K_C0000:
503 case MSR_MTRRfix4K_C8000:
504 case MSR_MTRRfix4K_D0000:
505 case MSR_MTRRfix4K_D8000:
506 case MSR_MTRRfix4K_E0000:
507 case MSR_MTRRfix4K_E8000:
508 case MSR_MTRRfix4K_F0000:
509 case MSR_MTRRfix4K_F8000:
510 val = env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - MSR_MTRRfix4K_C0000 + 3];
512 case MSR_MTRRdefType:
513 val = env->mtrr_deftype;
516 if (env->features[FEAT_1_EDX] & CPUID_MTRR) {
517 val = MSR_MTRRcap_VCNT | MSR_MTRRcap_FIXRANGE_SUPPORT |
518 MSR_MTRRcap_WC_SUPPORTED;
520 /* XXX: exception? */
528 if (env->mcg_cap & MCG_CTL_P) {
535 val = env->mcg_status;
537 case MSR_IA32_MISC_ENABLE:
538 val = env->msr_ia32_misc_enable;
541 if ((uint32_t)env->regs[R_ECX] >= MSR_MC0_CTL
542 && (uint32_t)env->regs[R_ECX] < MSR_MC0_CTL + (4 * env->mcg_cap & 0xff)) {
543 uint32_t offset = (uint32_t)env->regs[R_ECX] - MSR_MC0_CTL;
544 val = env->mce_banks[offset];
547 /* XXX: exception? */
551 env->regs[R_EAX] = (uint32_t)(val);
552 env->regs[R_EDX] = (uint32_t)(val >> 32);
556 static void do_hlt(X86CPU *cpu)
558 CPUState *cs = CPU(cpu);
559 CPUX86State *env = &cpu->env;
561 env->hflags &= ~HF_INHIBIT_IRQ_MASK; /* needed if sti is just before */
563 env->exception_index = EXCP_HLT;
567 void helper_hlt(CPUX86State *env, int next_eip_addend)
569 X86CPU *cpu = x86_env_get_cpu(env);
571 cpu_svm_check_intercept_param(env, SVM_EXIT_HLT, 0);
572 EIP += next_eip_addend;
577 void helper_monitor(CPUX86State *env, target_ulong ptr)
579 if ((uint32_t)env->regs[R_ECX] != 0) {
580 raise_exception(env, EXCP0D_GPF);
582 /* XXX: store address? */
583 cpu_svm_check_intercept_param(env, SVM_EXIT_MONITOR, 0);
586 void helper_mwait(CPUX86State *env, int next_eip_addend)
591 if ((uint32_t)env->regs[R_ECX] != 0) {
592 raise_exception(env, EXCP0D_GPF);
594 cpu_svm_check_intercept_param(env, SVM_EXIT_MWAIT, 0);
595 EIP += next_eip_addend;
597 cpu = x86_env_get_cpu(env);
599 /* XXX: not complete but not completely erroneous */
600 if (cs->cpu_index != 0 || env->next_cpu != NULL) {
601 /* more than one CPU: do not sleep because another CPU may
608 void helper_debug(CPUX86State *env)
610 env->exception_index = EXCP_DEBUG;