2 * i386 virtual CPU header
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
26 #define TARGET_LONG_BITS 64
28 #define TARGET_LONG_BITS 32
31 /* target supports implicit self modifying code */
32 #define TARGET_HAS_SMC
33 /* support for self modifying code even if the modified instruction is
34 close to the modifying instruction */
35 #define TARGET_HAS_PRECISE_SMC
37 #define TARGET_HAS_ICE 1
40 #define ELF_MACHINE EM_X86_64
42 #define ELF_MACHINE EM_386
47 #include "softfloat.h"
74 /* segment descriptor fields */
75 #define DESC_G_MASK (1 << 23)
76 #define DESC_B_SHIFT 22
77 #define DESC_B_MASK (1 << DESC_B_SHIFT)
78 #define DESC_L_SHIFT 21 /* x86_64 only : 64 bit code segment */
79 #define DESC_L_MASK (1 << DESC_L_SHIFT)
80 #define DESC_AVL_MASK (1 << 20)
81 #define DESC_P_MASK (1 << 15)
82 #define DESC_DPL_SHIFT 13
83 #define DESC_DPL_MASK (1 << DESC_DPL_SHIFT)
84 #define DESC_S_MASK (1 << 12)
85 #define DESC_TYPE_SHIFT 8
86 #define DESC_A_MASK (1 << 8)
88 #define DESC_CS_MASK (1 << 11) /* 1=code segment 0=data segment */
89 #define DESC_C_MASK (1 << 10) /* code: conforming */
90 #define DESC_R_MASK (1 << 9) /* code: readable */
92 #define DESC_E_MASK (1 << 10) /* data: expansion direction */
93 #define DESC_W_MASK (1 << 9) /* data: writable */
95 #define DESC_TSS_BUSY_MASK (1 << 9)
106 #define IOPL_SHIFT 12
109 #define TF_MASK 0x00000100
110 #define IF_MASK 0x00000200
111 #define DF_MASK 0x00000400
112 #define IOPL_MASK 0x00003000
113 #define NT_MASK 0x00004000
114 #define RF_MASK 0x00010000
115 #define VM_MASK 0x00020000
116 #define AC_MASK 0x00040000
117 #define VIF_MASK 0x00080000
118 #define VIP_MASK 0x00100000
119 #define ID_MASK 0x00200000
121 /* hidden flags - used internally by qemu to represent additional cpu
122 states. Only the CPL, INHIBIT_IRQ and HALTED are not redundant. We avoid
123 using the IOPL_MASK, TF_MASK and VM_MASK bit position to ease oring
126 #define HF_CPL_SHIFT 0
127 /* true if soft mmu is being used */
128 #define HF_SOFTMMU_SHIFT 2
129 /* true if hardware interrupts must be disabled for next instruction */
130 #define HF_INHIBIT_IRQ_SHIFT 3
131 /* 16 or 32 segments */
132 #define HF_CS32_SHIFT 4
133 #define HF_SS32_SHIFT 5
134 /* zero base for DS, ES and SS : can be '0' only in 32 bit CS segment */
135 #define HF_ADDSEG_SHIFT 6
136 /* copy of CR0.PE (protected mode) */
137 #define HF_PE_SHIFT 7
138 #define HF_TF_SHIFT 8 /* must be same as eflags */
139 #define HF_MP_SHIFT 9 /* the order must be MP, EM, TS */
140 #define HF_EM_SHIFT 10
141 #define HF_TS_SHIFT 11
142 #define HF_IOPL_SHIFT 12 /* must be same as eflags */
143 #define HF_LMA_SHIFT 14 /* only used on x86_64: long mode active */
144 #define HF_CS64_SHIFT 15 /* only used on x86_64: 64 bit code segment */
145 #define HF_OSFXSR_SHIFT 16 /* CR4.OSFXSR */
146 #define HF_VM_SHIFT 17 /* must be same as eflags */
147 #define HF_HALTED_SHIFT 18 /* CPU halted */
148 #define HF_SMM_SHIFT 19 /* CPU in SMM mode */
149 #define HF_GIF_SHIFT 20 /* if set CPU takes interrupts */
150 #define HF_HIF_SHIFT 21 /* shadow copy of IF_MASK when in SVM */
151 #define HF_NMI_SHIFT 22 /* CPU serving NMI */
153 #define HF_CPL_MASK (3 << HF_CPL_SHIFT)
154 #define HF_SOFTMMU_MASK (1 << HF_SOFTMMU_SHIFT)
155 #define HF_INHIBIT_IRQ_MASK (1 << HF_INHIBIT_IRQ_SHIFT)
156 #define HF_CS32_MASK (1 << HF_CS32_SHIFT)
157 #define HF_SS32_MASK (1 << HF_SS32_SHIFT)
158 #define HF_ADDSEG_MASK (1 << HF_ADDSEG_SHIFT)
159 #define HF_PE_MASK (1 << HF_PE_SHIFT)
160 #define HF_TF_MASK (1 << HF_TF_SHIFT)
161 #define HF_MP_MASK (1 << HF_MP_SHIFT)
162 #define HF_EM_MASK (1 << HF_EM_SHIFT)
163 #define HF_TS_MASK (1 << HF_TS_SHIFT)
164 #define HF_LMA_MASK (1 << HF_LMA_SHIFT)
165 #define HF_CS64_MASK (1 << HF_CS64_SHIFT)
166 #define HF_OSFXSR_MASK (1 << HF_OSFXSR_SHIFT)
167 #define HF_HALTED_MASK (1 << HF_HALTED_SHIFT)
168 #define HF_SMM_MASK (1 << HF_SMM_SHIFT)
169 #define HF_GIF_MASK (1 << HF_GIF_SHIFT)
170 #define HF_HIF_MASK (1 << HF_HIF_SHIFT)
171 #define HF_NMI_MASK (1 << HF_NMI_SHIFT)
173 #define CR0_PE_MASK (1 << 0)
174 #define CR0_MP_MASK (1 << 1)
175 #define CR0_EM_MASK (1 << 2)
176 #define CR0_TS_MASK (1 << 3)
177 #define CR0_ET_MASK (1 << 4)
178 #define CR0_NE_MASK (1 << 5)
179 #define CR0_WP_MASK (1 << 16)
180 #define CR0_AM_MASK (1 << 18)
181 #define CR0_PG_MASK (1 << 31)
183 #define CR4_VME_MASK (1 << 0)
184 #define CR4_PVI_MASK (1 << 1)
185 #define CR4_TSD_MASK (1 << 2)
186 #define CR4_DE_MASK (1 << 3)
187 #define CR4_PSE_MASK (1 << 4)
188 #define CR4_PAE_MASK (1 << 5)
189 #define CR4_PGE_MASK (1 << 7)
190 #define CR4_PCE_MASK (1 << 8)
191 #define CR4_OSFXSR_MASK (1 << 9)
192 #define CR4_OSXMMEXCPT_MASK (1 << 10)
194 #define PG_PRESENT_BIT 0
196 #define PG_USER_BIT 2
199 #define PG_ACCESSED_BIT 5
200 #define PG_DIRTY_BIT 6
202 #define PG_GLOBAL_BIT 8
205 #define PG_PRESENT_MASK (1 << PG_PRESENT_BIT)
206 #define PG_RW_MASK (1 << PG_RW_BIT)
207 #define PG_USER_MASK (1 << PG_USER_BIT)
208 #define PG_PWT_MASK (1 << PG_PWT_BIT)
209 #define PG_PCD_MASK (1 << PG_PCD_BIT)
210 #define PG_ACCESSED_MASK (1 << PG_ACCESSED_BIT)
211 #define PG_DIRTY_MASK (1 << PG_DIRTY_BIT)
212 #define PG_PSE_MASK (1 << PG_PSE_BIT)
213 #define PG_GLOBAL_MASK (1 << PG_GLOBAL_BIT)
214 #define PG_NX_MASK (1LL << PG_NX_BIT)
216 #define PG_ERROR_W_BIT 1
218 #define PG_ERROR_P_MASK 0x01
219 #define PG_ERROR_W_MASK (1 << PG_ERROR_W_BIT)
220 #define PG_ERROR_U_MASK 0x04
221 #define PG_ERROR_RSVD_MASK 0x08
222 #define PG_ERROR_I_D_MASK 0x10
224 #define MSR_IA32_APICBASE 0x1b
225 #define MSR_IA32_APICBASE_BSP (1<<8)
226 #define MSR_IA32_APICBASE_ENABLE (1<<11)
227 #define MSR_IA32_APICBASE_BASE (0xfffff<<12)
229 #define MSR_IA32_SYSENTER_CS 0x174
230 #define MSR_IA32_SYSENTER_ESP 0x175
231 #define MSR_IA32_SYSENTER_EIP 0x176
233 #define MSR_MCG_CAP 0x179
234 #define MSR_MCG_STATUS 0x17a
235 #define MSR_MCG_CTL 0x17b
237 #define MSR_PAT 0x277
239 #define MSR_EFER 0xc0000080
241 #define MSR_EFER_SCE (1 << 0)
242 #define MSR_EFER_LME (1 << 8)
243 #define MSR_EFER_LMA (1 << 10)
244 #define MSR_EFER_NXE (1 << 11)
245 #define MSR_EFER_FFXSR (1 << 14)
247 #define MSR_STAR 0xc0000081
248 #define MSR_LSTAR 0xc0000082
249 #define MSR_CSTAR 0xc0000083
250 #define MSR_FMASK 0xc0000084
251 #define MSR_FSBASE 0xc0000100
252 #define MSR_GSBASE 0xc0000101
253 #define MSR_KERNELGSBASE 0xc0000102
255 #define MSR_VM_HSAVE_PA 0xc0010117
257 /* cpuid_features bits */
258 #define CPUID_FP87 (1 << 0)
259 #define CPUID_VME (1 << 1)
260 #define CPUID_DE (1 << 2)
261 #define CPUID_PSE (1 << 3)
262 #define CPUID_TSC (1 << 4)
263 #define CPUID_MSR (1 << 5)
264 #define CPUID_PAE (1 << 6)
265 #define CPUID_MCE (1 << 7)
266 #define CPUID_CX8 (1 << 8)
267 #define CPUID_APIC (1 << 9)
268 #define CPUID_SEP (1 << 11) /* sysenter/sysexit */
269 #define CPUID_MTRR (1 << 12)
270 #define CPUID_PGE (1 << 13)
271 #define CPUID_MCA (1 << 14)
272 #define CPUID_CMOV (1 << 15)
273 #define CPUID_PAT (1 << 16)
274 #define CPUID_PSE36 (1 << 17)
275 #define CPUID_PN (1 << 18)
276 #define CPUID_CLFLUSH (1 << 19)
277 #define CPUID_DTS (1 << 21)
278 #define CPUID_ACPI (1 << 22)
279 #define CPUID_MMX (1 << 23)
280 #define CPUID_FXSR (1 << 24)
281 #define CPUID_SSE (1 << 25)
282 #define CPUID_SSE2 (1 << 26)
283 #define CPUID_SS (1 << 27)
284 #define CPUID_HT (1 << 28)
285 #define CPUID_TM (1 << 29)
286 #define CPUID_IA64 (1 << 30)
287 #define CPUID_PBE (1 << 31)
289 #define CPUID_EXT_SSE3 (1 << 0)
290 #define CPUID_EXT_MONITOR (1 << 3)
291 #define CPUID_EXT_DSCPL (1 << 4)
292 #define CPUID_EXT_VMX (1 << 5)
293 #define CPUID_EXT_SMX (1 << 6)
294 #define CPUID_EXT_EST (1 << 7)
295 #define CPUID_EXT_TM2 (1 << 8)
296 #define CPUID_EXT_SSSE3 (1 << 9)
297 #define CPUID_EXT_CID (1 << 10)
298 #define CPUID_EXT_CX16 (1 << 13)
299 #define CPUID_EXT_XTPR (1 << 14)
300 #define CPUID_EXT_DCA (1 << 17)
301 #define CPUID_EXT_POPCNT (1 << 22)
303 #define CPUID_EXT2_SYSCALL (1 << 11)
304 #define CPUID_EXT2_MP (1 << 19)
305 #define CPUID_EXT2_NX (1 << 20)
306 #define CPUID_EXT2_MMXEXT (1 << 22)
307 #define CPUID_EXT2_FFXSR (1 << 25)
308 #define CPUID_EXT2_PDPE1GB (1 << 26)
309 #define CPUID_EXT2_RDTSCP (1 << 27)
310 #define CPUID_EXT2_LM (1 << 29)
311 #define CPUID_EXT2_3DNOWEXT (1 << 30)
312 #define CPUID_EXT2_3DNOW (1 << 31)
314 #define CPUID_EXT3_LAHF_LM (1 << 0)
315 #define CPUID_EXT3_CMP_LEG (1 << 1)
316 #define CPUID_EXT3_SVM (1 << 2)
317 #define CPUID_EXT3_EXTAPIC (1 << 3)
318 #define CPUID_EXT3_CR8LEG (1 << 4)
319 #define CPUID_EXT3_ABM (1 << 5)
320 #define CPUID_EXT3_SSE4A (1 << 6)
321 #define CPUID_EXT3_MISALIGNSSE (1 << 7)
322 #define CPUID_EXT3_3DNOWPREFETCH (1 << 8)
323 #define CPUID_EXT3_OSVW (1 << 9)
324 #define CPUID_EXT3_IBS (1 << 10)
326 #define EXCP00_DIVZ 0
327 #define EXCP01_SSTP 1
329 #define EXCP03_INT3 3
330 #define EXCP04_INTO 4
331 #define EXCP05_BOUND 5
332 #define EXCP06_ILLOP 6
333 #define EXCP07_PREX 7
334 #define EXCP08_DBLE 8
335 #define EXCP09_XERR 9
336 #define EXCP0A_TSS 10
337 #define EXCP0B_NOSEG 11
338 #define EXCP0C_STACK 12
339 #define EXCP0D_GPF 13
340 #define EXCP0E_PAGE 14
341 #define EXCP10_COPR 16
342 #define EXCP11_ALGN 17
343 #define EXCP12_MCHK 18
345 #define EXCP_SYSCALL 0x100 /* only happens in user only emulation
346 for syscall instruction */
349 CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
350 CC_OP_EFLAGS, /* all cc are explicitely computed, CC_SRC = flags */
352 CC_OP_MULB, /* modify all flags, C, O = (CC_SRC != 0) */
357 CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
362 CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
367 CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
372 CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
377 CC_OP_LOGICB, /* modify all flags, CC_DST = res */
382 CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */
387 CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C */
392 CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.msb = C */
397 CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
406 #define USE_X86LDOUBLE
409 #ifdef USE_X86LDOUBLE
410 typedef floatx80 CPU86_LDouble;
412 typedef float64 CPU86_LDouble;
415 typedef struct SegmentCache {
439 #ifdef WORDS_BIGENDIAN
440 #define XMM_B(n) _b[15 - (n)]
441 #define XMM_W(n) _w[7 - (n)]
442 #define XMM_L(n) _l[3 - (n)]
443 #define XMM_S(n) _s[3 - (n)]
444 #define XMM_Q(n) _q[1 - (n)]
445 #define XMM_D(n) _d[1 - (n)]
447 #define MMX_B(n) _b[7 - (n)]
448 #define MMX_W(n) _w[3 - (n)]
449 #define MMX_L(n) _l[1 - (n)]
450 #define MMX_S(n) _s[1 - (n)]
452 #define XMM_B(n) _b[n]
453 #define XMM_W(n) _w[n]
454 #define XMM_L(n) _l[n]
455 #define XMM_S(n) _s[n]
456 #define XMM_Q(n) _q[n]
457 #define XMM_D(n) _d[n]
459 #define MMX_B(n) _b[n]
460 #define MMX_W(n) _w[n]
461 #define MMX_L(n) _l[n]
462 #define MMX_S(n) _s[n]
467 #define CPU_NB_REGS 16
469 #define CPU_NB_REGS 8
472 #define NB_MMU_MODES 2
474 typedef struct CPUX86State {
475 #if TARGET_LONG_BITS > HOST_LONG_BITS
476 /* temporaries if we cannot store them in host registers */
477 target_ulong t0, t1, t2;
481 /* standard registers */
482 target_ulong regs[CPU_NB_REGS];
484 target_ulong eflags; /* eflags register. During CPU emulation, CC
485 flags and DF are set to zero because they are
488 /* emulator internal eflags handling */
492 int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
493 uint32_t hflags; /* hidden flags, see HF_xxx constants */
496 SegmentCache segs[6]; /* selector values */
499 SegmentCache gdt; /* only base and limit are used */
500 SegmentCache idt; /* only base and limit are used */
502 target_ulong cr[9]; /* NOTE: cr1, cr5-7 are unused */
506 unsigned int fpstt; /* top of stack index */
509 uint8_t fptags[8]; /* 0 = valid, 1 = empty */
511 #ifdef USE_X86LDOUBLE
512 CPU86_LDouble d __attribute__((aligned(16)));
519 /* emulator internal variables */
520 float_status fp_status;
523 float_status mmx_status; /* for 3DNow! float ops */
524 float_status sse_status;
526 XMMReg xmm_regs[CPU_NB_REGS];
530 /* sysenter registers */
531 uint32_t sysenter_cs;
532 uint32_t sysenter_esp;
533 uint32_t sysenter_eip;
537 target_phys_addr_t vm_hsave;
538 target_phys_addr_t vm_vmcb;
540 uint16_t intercept_cr_read;
541 uint16_t intercept_cr_write;
542 uint16_t intercept_dr_read;
543 uint16_t intercept_dr_write;
544 uint32_t intercept_exceptions;
550 target_ulong kernelgsbase;
555 /* exception/interrupt handling */
559 int exception_is_int;
560 target_ulong exception_next_eip;
561 target_ulong dr[8]; /* debug registers */
563 int interrupt_request;
564 int user_mode_only; /* user mode only simulation */
565 int old_exception; /* exception in flight */
569 /* processor features (e.g. for CPUID insn) */
570 uint32_t cpuid_level;
571 uint32_t cpuid_vendor1;
572 uint32_t cpuid_vendor2;
573 uint32_t cpuid_vendor3;
574 uint32_t cpuid_version;
575 uint32_t cpuid_features;
576 uint32_t cpuid_ext_features;
577 uint32_t cpuid_xlevel;
578 uint32_t cpuid_model[12];
579 uint32_t cpuid_ext2_features;
580 uint32_t cpuid_ext3_features;
581 uint32_t cpuid_apic_id;
587 /* in order to simplify APIC support, we leave this pointer to the
589 struct APICState *apic_state;
592 CPUX86State *cpu_x86_init(const char *cpu_model);
593 int cpu_x86_exec(CPUX86State *s);
594 void cpu_x86_close(CPUX86State *s);
595 void x86_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt,
597 int cpu_get_pic_interrupt(CPUX86State *s);
598 /* MSDOS compatibility mode FPU exception support */
599 void cpu_set_ferr(CPUX86State *s);
601 /* this function must always be used to load data in the segment
602 cache: it synchronizes the hflags with the segment cache values */
603 static inline void cpu_x86_load_seg_cache(CPUX86State *env,
604 int seg_reg, unsigned int selector,
610 unsigned int new_hflags;
612 sc = &env->segs[seg_reg];
613 sc->selector = selector;
618 /* update the hidden flags */
620 if (seg_reg == R_CS) {
622 if ((env->hflags & HF_LMA_MASK) && (flags & DESC_L_MASK)) {
624 env->hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK;
625 env->hflags &= ~(HF_ADDSEG_MASK);
629 /* legacy / compatibility case */
630 new_hflags = (env->segs[R_CS].flags & DESC_B_MASK)
631 >> (DESC_B_SHIFT - HF_CS32_SHIFT);
632 env->hflags = (env->hflags & ~(HF_CS32_MASK | HF_CS64_MASK)) |
636 new_hflags = (env->segs[R_SS].flags & DESC_B_MASK)
637 >> (DESC_B_SHIFT - HF_SS32_SHIFT);
638 if (env->hflags & HF_CS64_MASK) {
639 /* zero base assumed for DS, ES and SS in long mode */
640 } else if (!(env->cr[0] & CR0_PE_MASK) ||
641 (env->eflags & VM_MASK) ||
642 !(env->hflags & HF_CS32_MASK)) {
643 /* XXX: try to avoid this test. The problem comes from the
644 fact that is real mode or vm86 mode we only modify the
645 'base' and 'selector' fields of the segment cache to go
646 faster. A solution may be to force addseg to one in
648 new_hflags |= HF_ADDSEG_MASK;
650 new_hflags |= ((env->segs[R_DS].base |
651 env->segs[R_ES].base |
652 env->segs[R_SS].base) != 0) <<
655 env->hflags = (env->hflags &
656 ~(HF_SS32_MASK | HF_ADDSEG_MASK)) | new_hflags;
660 /* wrapper, just in case memory mappings must be changed */
661 static inline void cpu_x86_set_cpl(CPUX86State *s, int cpl)
664 s->hflags = (s->hflags & ~HF_CPL_MASK) | cpl;
666 #error HF_CPL_MASK is hardcoded
670 /* used for debug or cpu save/restore */
671 void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f);
672 CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper);
674 /* the following helpers are only usable in user mode simulation as
675 they can trigger unexpected exceptions */
676 void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector);
677 void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32);
678 void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32);
680 /* you can call this signal handler from your SIGBUS and SIGSEGV
681 signal handlers to inform the virtual CPU of exceptions. non zero
682 is returned if the signal was handled by the virtual CPU. */
683 int cpu_x86_signal_handler(int host_signum, void *pinfo,
685 void cpu_x86_set_a20(CPUX86State *env, int a20_state);
687 uint64_t cpu_get_tsc(CPUX86State *env);
689 void cpu_set_apic_base(CPUX86State *env, uint64_t val);
690 uint64_t cpu_get_apic_base(CPUX86State *env);
691 void cpu_set_apic_tpr(CPUX86State *env, uint8_t val);
692 #ifndef NO_CPU_IO_DEFS
693 uint8_t cpu_get_apic_tpr(CPUX86State *env);
695 void cpu_smm_update(CPUX86State *env);
697 /* will be suppressed */
698 void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0);
701 #define X86_DUMP_FPU 0x0001 /* dump FPU state too */
702 #define X86_DUMP_CCOP 0x0002 /* dump qemu flag cache */
705 static inline int cpu_get_time_fast(void)
708 asm volatile("rdtsc" : "=a" (low), "=d" (high));
713 #define TARGET_PAGE_BITS 12
715 #define CPUState CPUX86State
716 #define cpu_init cpu_x86_init
717 #define cpu_exec cpu_x86_exec
718 #define cpu_gen_code cpu_x86_gen_code
719 #define cpu_signal_handler cpu_x86_signal_handler
720 #define cpu_list x86_cpu_list
722 /* MMU modes definitions */
723 #define MMU_MODE0_SUFFIX _kernel
724 #define MMU_MODE1_SUFFIX _user
725 #define MMU_USER_IDX 1
726 static inline int cpu_mmu_index (CPUState *env)
728 return (env->hflags & HF_CPL_MASK) == 3 ? 1 : 0;
731 typedef struct CCTable {
732 int (*compute_all)(void); /* return all the flags */
733 int (*compute_c)(void); /* return the C flag */
736 extern CCTable cc_table[];
742 #endif /* CPU_I386_H */