[mirror_qemu.git] / target-i386 / cpu.h

/*
 * i386 virtual CPU header
 * 
 *  Copyright (c) 2003 Fabrice Bellard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef CPU_I386_H
#define CPU_I386_H

#include "config.h"

#ifdef TARGET_X86_64
#define TARGET_LONG_BITS 64
#else
#define TARGET_LONG_BITS 32
#endif

/* target supports implicit self modifying code */
#define TARGET_HAS_SMC
/* support for self modifying code even if the modified instruction is
   close to the modifying instruction */
#define TARGET_HAS_PRECISE_SMC

#define TARGET_HAS_ICE 1

#include "cpu-defs.h"

#include "softfloat.h"

#if defined(__i386__) && !defined(CONFIG_SOFTMMU)
#define USE_CODE_COPY
#endif

#define R_EAX 0
#define R_ECX 1
#define R_EDX 2
#define R_EBX 3
#define R_ESP 4
#define R_EBP 5
#define R_ESI 6
#define R_EDI 7

#define R_AL 0
#define R_CL 1
#define R_DL 2
#define R_BL 3
#define R_AH 4
#define R_CH 5
#define R_DH 6
#define R_BH 7

#define R_ES 0
#define R_CS 1
#define R_SS 2
#define R_DS 3
#define R_FS 4
#define R_GS 5

/* segment descriptor fields */
#define DESC_G_MASK     (1 << 23)
#define DESC_B_SHIFT    22
#define DESC_B_MASK     (1 << DESC_B_SHIFT)
#define DESC_L_SHIFT    21 /* x86_64 only : 64 bit code segment */
#define DESC_L_MASK     (1 << DESC_L_SHIFT)
#define DESC_AVL_MASK   (1 << 20)
#define DESC_P_MASK     (1 << 15)
#define DESC_DPL_SHIFT  13
#define DESC_S_MASK     (1 << 12)
#define DESC_TYPE_SHIFT 8
#define DESC_A_MASK     (1 << 8)

#define DESC_CS_MASK    (1 << 11) /* 1=code segment 0=data segment */
#define DESC_C_MASK     (1 << 10) /* code: conforming */
#define DESC_R_MASK     (1 << 9)  /* code: readable */

#define DESC_E_MASK     (1 << 10) /* data: expansion direction */
#define DESC_W_MASK     (1 << 9)  /* data: writable */

#define DESC_TSS_BUSY_MASK (1 << 9)

/* eflags masks */
#define CC_C   	0x0001
#define CC_P 	0x0004
#define CC_A	0x0010
#define CC_Z	0x0040
#define CC_S    0x0080
#define CC_O    0x0800

#define TF_SHIFT   8
#define IOPL_SHIFT 12
#define VM_SHIFT   17

#define TF_MASK 		0x00000100
#define IF_MASK 		0x00000200
#define DF_MASK 		0x00000400
#define IOPL_MASK		0x00003000
#define NT_MASK	         	0x00004000
#define RF_MASK			0x00010000
#define VM_MASK			0x00020000
#define AC_MASK			0x00040000 
#define VIF_MASK                0x00080000
#define VIP_MASK                0x00100000
#define ID_MASK                 0x00200000

/* hidden flags - used internally by qemu to represent additionnal cpu
   states. Only the CPL and INHIBIT_IRQ are not redundant. We avoid
   using the IOPL_MASK, TF_MASK and VM_MASK bit position to ease oring
   with eflags. */
/* current cpl */
#define HF_CPL_SHIFT         0
/* true if soft mmu is being used */
#define HF_SOFTMMU_SHIFT     2
/* true if hardware interrupts must be disabled for next instruction */
#define HF_INHIBIT_IRQ_SHIFT 3
/* 16 or 32 segments */
#define HF_CS32_SHIFT        4
#define HF_SS32_SHIFT        5
/* zero base for DS, ES and SS : can be '0' only in 32 bit CS segment */
#define HF_ADDSEG_SHIFT      6
/* copy of CR0.PE (protected mode) */
#define HF_PE_SHIFT          7
#define HF_TF_SHIFT          8 /* must be same as eflags */
#define HF_MP_SHIFT          9 /* the order must be MP, EM, TS */
#define HF_EM_SHIFT         10
#define HF_TS_SHIFT         11
#define HF_IOPL_SHIFT       12 /* must be same as eflags */
#define HF_LMA_SHIFT        14 /* only used on x86_64: long mode active */
#define HF_CS64_SHIFT       15 /* only used on x86_64: 64 bit code segment  */
#define HF_OSFXSR_SHIFT     16 /* CR4.OSFXSR */
#define HF_VM_SHIFT         17 /* must be same as eflags */

#define HF_CPL_MASK          (3 << HF_CPL_SHIFT)
#define HF_SOFTMMU_MASK      (1 << HF_SOFTMMU_SHIFT)
#define HF_INHIBIT_IRQ_MASK  (1 << HF_INHIBIT_IRQ_SHIFT)
#define HF_CS32_MASK         (1 << HF_CS32_SHIFT)
#define HF_SS32_MASK         (1 << HF_SS32_SHIFT)
#define HF_ADDSEG_MASK       (1 << HF_ADDSEG_SHIFT)
#define HF_PE_MASK           (1 << HF_PE_SHIFT)
#define HF_TF_MASK           (1 << HF_TF_SHIFT)
#define HF_MP_MASK           (1 << HF_MP_SHIFT)
#define HF_EM_MASK           (1 << HF_EM_SHIFT)
#define HF_TS_MASK           (1 << HF_TS_SHIFT)
#define HF_LMA_MASK          (1 << HF_LMA_SHIFT)
#define HF_CS64_MASK         (1 << HF_CS64_SHIFT)
#define HF_OSFXSR_MASK       (1 << HF_OSFXSR_SHIFT)

#define CR0_PE_MASK  (1 << 0)
#define CR0_MP_MASK  (1 << 1)
#define CR0_EM_MASK  (1 << 2)
#define CR0_TS_MASK  (1 << 3)
#define CR0_ET_MASK  (1 << 4)
#define CR0_NE_MASK  (1 << 5)
#define CR0_WP_MASK  (1 << 16)
#define CR0_AM_MASK  (1 << 18)
#define CR0_PG_MASK  (1 << 31)

#define CR4_VME_MASK  (1 << 0)
#define CR4_PVI_MASK  (1 << 1)
#define CR4_TSD_MASK  (1 << 2)
#define CR4_DE_MASK   (1 << 3)
#define CR4_PSE_MASK  (1 << 4)
#define CR4_PAE_MASK  (1 << 5)
#define CR4_PGE_MASK  (1 << 7)
#define CR4_PCE_MASK  (1 << 8)
#define CR4_OSFXSR_MASK (1 << 9)
#define CR4_OSXMMEXCPT_MASK  (1 << 10)

#define PG_PRESENT_BIT	0
#define PG_RW_BIT	1
#define PG_USER_BIT	2
#define PG_PWT_BIT	3
#define PG_PCD_BIT	4
#define PG_ACCESSED_BIT	5
#define PG_DIRTY_BIT	6
#define PG_PSE_BIT	7
#define PG_GLOBAL_BIT	8

#define PG_PRESENT_MASK  (1 << PG_PRESENT_BIT)
#define PG_RW_MASK	 (1 << PG_RW_BIT)
#define PG_USER_MASK	 (1 << PG_USER_BIT)
#define PG_PWT_MASK	 (1 << PG_PWT_BIT)
#define PG_PCD_MASK	 (1 << PG_PCD_BIT)
#define PG_ACCESSED_MASK (1 << PG_ACCESSED_BIT)
#define PG_DIRTY_MASK	 (1 << PG_DIRTY_BIT)
#define PG_PSE_MASK	 (1 << PG_PSE_BIT)
#define PG_GLOBAL_MASK	 (1 << PG_GLOBAL_BIT)

#define PG_ERROR_W_BIT     1

#define PG_ERROR_P_MASK    0x01
#define PG_ERROR_W_MASK    (1 << PG_ERROR_W_BIT)
#define PG_ERROR_U_MASK    0x04
#define PG_ERROR_RSVD_MASK 0x08

#define MSR_IA32_APICBASE               0x1b
#define MSR_IA32_APICBASE_BSP           (1<<8)
#define MSR_IA32_APICBASE_ENABLE        (1<<11)
#define MSR_IA32_APICBASE_BASE          (0xfffff<<12)

#define MSR_IA32_SYSENTER_CS            0x174
#define MSR_IA32_SYSENTER_ESP           0x175
#define MSR_IA32_SYSENTER_EIP           0x176

#define MSR_EFER                        0xc0000080

#define MSR_EFER_SCE   (1 << 0)
#define MSR_EFER_LME   (1 << 8)
#define MSR_EFER_LMA   (1 << 10)
#define MSR_EFER_NXE   (1 << 11)
#define MSR_EFER_FFXSR (1 << 14)

#define MSR_STAR                        0xc0000081
#define MSR_LSTAR                       0xc0000082
#define MSR_CSTAR                       0xc0000083
#define MSR_FMASK                       0xc0000084
#define MSR_FSBASE                      0xc0000100
#define MSR_GSBASE                      0xc0000101
#define MSR_KERNELGSBASE                0xc0000102

/* cpuid_features bits */
#define CPUID_FP87 (1 << 0)
#define CPUID_VME  (1 << 1)
#define CPUID_DE   (1 << 2)
#define CPUID_PSE  (1 << 3)
#define CPUID_TSC  (1 << 4)
#define CPUID_MSR  (1 << 5)
#define CPUID_PAE  (1 << 6)
#define CPUID_MCE  (1 << 7)
#define CPUID_CX8  (1 << 8)
#define CPUID_APIC (1 << 9)
#define CPUID_SEP  (1 << 11) /* sysenter/sysexit */
#define CPUID_MTRR (1 << 12)
#define CPUID_PGE  (1 << 13)
#define CPUID_MCA  (1 << 14)
#define CPUID_CMOV (1 << 15)
/* ... */
#define CPUID_MMX  (1 << 23)
#define CPUID_FXSR (1 << 24)
#define CPUID_SSE  (1 << 25)
#define CPUID_SSE2 (1 << 26)

#define CPUID_EXT_SS3      (1 << 0)
#define CPUID_EXT_MONITOR  (1 << 3)
#define CPUID_EXT_CX16     (1 << 13)

#define CPUID_EXT2_SYSCALL (1 << 11)
#define CPUID_EXT2_NX      (1 << 20)
#define CPUID_EXT2_FFXSR   (1 << 25)
#define CPUID_EXT2_LM      (1 << 29)

#define EXCP00_DIVZ	0
#define EXCP01_SSTP	1
#define EXCP02_NMI	2
#define EXCP03_INT3	3
#define EXCP04_INTO	4
#define EXCP05_BOUND	5
#define EXCP06_ILLOP	6
#define EXCP07_PREX	7
#define EXCP08_DBLE	8
#define EXCP09_XERR	9
#define EXCP0A_TSS	10
#define EXCP0B_NOSEG	11
#define EXCP0C_STACK	12
#define EXCP0D_GPF	13
#define EXCP0E_PAGE	14
#define EXCP10_COPR	16
#define EXCP11_ALGN	17
#define EXCP12_MCHK	18

enum {
    CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
    CC_OP_EFLAGS,  /* all cc are explicitely computed, CC_SRC = flags */

    CC_OP_MULB, /* modify all flags, C, O = (CC_SRC != 0) */
    CC_OP_MULW,
    CC_OP_MULL,
    CC_OP_MULQ,

    CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
    CC_OP_ADDW,
    CC_OP_ADDL,
    CC_OP_ADDQ,

    CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
    CC_OP_ADCW,
    CC_OP_ADCL,
    CC_OP_ADCQ,

    CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
    CC_OP_SUBW,
    CC_OP_SUBL,
    CC_OP_SUBQ,

    CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
    CC_OP_SBBW,
    CC_OP_SBBL,
    CC_OP_SBBQ,

    CC_OP_LOGICB, /* modify all flags, CC_DST = res */
    CC_OP_LOGICW,
    CC_OP_LOGICL,
    CC_OP_LOGICQ,

    CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */
    CC_OP_INCW,
    CC_OP_INCL,
    CC_OP_INCQ,

    CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C  */
    CC_OP_DECW,
    CC_OP_DECL,
    CC_OP_DECQ,

    CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.msb = C */
    CC_OP_SHLW,
    CC_OP_SHLL,
    CC_OP_SHLQ,

    CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
    CC_OP_SARW,
    CC_OP_SARL,
    CC_OP_SARQ,

    CC_OP_NB,
};

#ifdef FLOATX80
#define USE_X86LDOUBLE
#endif

#ifdef USE_X86LDOUBLE
typedef floatx80 CPU86_LDouble;
#else
typedef float64 CPU86_LDouble;
#endif

typedef struct SegmentCache {
    uint32_t selector;
    target_ulong base;
    uint32_t limit;
    uint32_t flags;
} SegmentCache;

typedef union {
    uint8_t _b[16];
    uint16_t _w[8];
    uint32_t _l[4];
    uint64_t _q[2];
    float32 _s[4];
    float64 _d[2];
} XMMReg;

typedef union {
    uint8_t _b[8];
    uint16_t _w[2];
    uint32_t _l[1];
    uint64_t q;
} MMXReg;

#ifdef WORDS_BIGENDIAN
#define XMM_B(n) _b[15 - (n)]
#define XMM_W(n) _w[7 - (n)]
#define XMM_L(n) _l[3 - (n)]
#define XMM_S(n) _s[3 - (n)]
#define XMM_Q(n) _q[1 - (n)]
#define XMM_D(n) _d[1 - (n)]

#define MMX_B(n) _b[7 - (n)]
#define MMX_W(n) _w[3 - (n)]
#define MMX_L(n) _l[1 - (n)]
#else
#define XMM_B(n) _b[n]
#define XMM_W(n) _w[n]
#define XMM_L(n) _l[n]
#define XMM_S(n) _s[n]
#define XMM_Q(n) _q[n]
#define XMM_D(n) _d[n]

#define MMX_B(n) _b[n]
#define MMX_W(n) _w[n]
#define MMX_L(n) _l[n]
#endif
#define MMX_Q(n) q

#ifdef TARGET_X86_64
#define CPU_NB_REGS 16
#else
#define CPU_NB_REGS 8
#endif

typedef struct CPUX86State {
#if TARGET_LONG_BITS > HOST_LONG_BITS
    /* temporaries if we cannot store them in host registers */
    target_ulong t0, t1, t2;
#endif

    /* standard registers */
    target_ulong regs[CPU_NB_REGS];
    target_ulong eip;
    target_ulong eflags; /* eflags register. During CPU emulation, CC
                        flags and DF are set to zero because they are
                        stored elsewhere */

    /* emulator internal eflags handling */
    target_ulong cc_src;
    target_ulong cc_dst;
    uint32_t cc_op;
    int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
    uint32_t hflags; /* hidden flags, see HF_xxx constants */

    /* segments */
    SegmentCache segs[6]; /* selector values */
    SegmentCache ldt;
    SegmentCache tr;
    SegmentCache gdt; /* only base and limit are used */
    SegmentCache idt; /* only base and limit are used */

    target_ulong cr[5]; /* NOTE: cr1 is unused */
    uint32_t a20_mask;

    /* FPU state */
    unsigned int fpstt; /* top of stack index */
    unsigned int fpus;
    unsigned int fpuc;
    uint8_t fptags[8];   /* 0 = valid, 1 = empty */
    union {
#ifdef USE_X86LDOUBLE
        CPU86_LDouble d __attribute__((aligned(16)));
#else
        CPU86_LDouble d;
#endif
        MMXReg mmx;
    } fpregs[8];

    /* emulator internal variables */
    float_status fp_status;
    CPU86_LDouble ft0;
    union {
	float f;
        double d;
	int i32;
        int64_t i64;
    } fp_convert;
    
    float_status sse_status;
    uint32_t mxcsr;
    XMMReg xmm_regs[CPU_NB_REGS];
    XMMReg xmm_t0;
    MMXReg mmx_t0;

    /* sysenter registers */
    uint32_t sysenter_cs;
    uint32_t sysenter_esp;
    uint32_t sysenter_eip;
    uint64_t efer;
    uint64_t star;
#ifdef TARGET_X86_64
    target_ulong lstar;
    target_ulong cstar;
    target_ulong fmask;
    target_ulong kernelgsbase;
#endif

    /* temporary data for USE_CODE_COPY mode */
#ifdef USE_CODE_COPY
    uint32_t tmp0;
    uint32_t saved_esp;
    int native_fp_regs; /* if true, the FPU state is in the native CPU regs */
#endif
    
    /* exception/interrupt handling */
    jmp_buf jmp_env;
    int exception_index;
    int error_code;
    int exception_is_int;
    target_ulong exception_next_eip;
    struct TranslationBlock *current_tb; /* currently executing TB */
    target_ulong dr[8]; /* debug registers */
    int interrupt_request; 
    int user_mode_only; /* user mode only simulation */

    /* soft mmu support */
    /* in order to avoid passing too many arguments to the memory
       write helpers, we store some rarely used information in the CPU
       context) */
    unsigned long mem_write_pc; /* host pc at which the memory was
                                   written */
    target_ulong mem_write_vaddr; /* target virtual addr at which the
                                     memory was written */
    /* 0 = kernel, 1 = user */
    CPUTLBEntry tlb_read[2][CPU_TLB_SIZE];
    CPUTLBEntry tlb_write[2][CPU_TLB_SIZE];
    
    /* from this point: preserved by CPU reset */
    /* ice debug support */
    target_ulong breakpoints[MAX_BREAKPOINTS];
    int nb_breakpoints;
    int singlestep_enabled;

    /* processor features (e.g. for CPUID insn) */
    uint32_t cpuid_level;
    uint32_t cpuid_vendor1;
    uint32_t cpuid_vendor2;
    uint32_t cpuid_vendor3;
    uint32_t cpuid_version;
    uint32_t cpuid_features;
    uint32_t cpuid_ext_features;
    uint32_t cpuid_xlevel;
    uint32_t cpuid_model[12];
    uint32_t cpuid_ext2_features;
    
#ifdef USE_KQEMU
    int kqemu_enabled;
#endif
    /* in order to simplify APIC support, we leave this pointer to the
       user */
    struct APICState *apic_state;
    /* user data */
    void *opaque;
} CPUX86State;

CPUX86State *cpu_x86_init(void);
int cpu_x86_exec(CPUX86State *s);
void cpu_x86_close(CPUX86State *s);
int cpu_get_pic_interrupt(CPUX86State *s);
/* MSDOS compatibility mode FPU exception support */
void cpu_set_ferr(CPUX86State *s);

/* this function must always be used to load data in the segment
   cache: it synchronizes the hflags with the segment cache values */
static inline void cpu_x86_load_seg_cache(CPUX86State *env, 
                                          int seg_reg, unsigned int selector,
                                          uint32_t base, unsigned int limit, 
                                          unsigned int flags)
{
    SegmentCache *sc;
    unsigned int new_hflags;
    
    sc = &env->segs[seg_reg];
    sc->selector = selector;
    sc->base = base;
    sc->limit = limit;
    sc->flags = flags;

    /* update the hidden flags */
    {
        if (seg_reg == R_CS) {
#ifdef TARGET_X86_64
            if ((env->hflags & HF_LMA_MASK) && (flags & DESC_L_MASK)) {
                /* long mode */
                env->hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK;
                env->hflags &= ~(HF_ADDSEG_MASK);
            } else 
#endif
            {
                /* legacy / compatibility case */
                new_hflags = (env->segs[R_CS].flags & DESC_B_MASK)
                    >> (DESC_B_SHIFT - HF_CS32_SHIFT);
                env->hflags = (env->hflags & ~(HF_CS32_MASK | HF_CS64_MASK)) |
                    new_hflags;
            }
        }
        new_hflags = (env->segs[R_SS].flags & DESC_B_MASK)
            >> (DESC_B_SHIFT - HF_SS32_SHIFT);
        if (env->hflags & HF_CS64_MASK) {
            /* zero base assumed for DS, ES and SS in long mode */
        } else if (!(env->cr[0] & CR0_PE_MASK) || 
                   (env->eflags & VM_MASK) ||
                   !(env->hflags & HF_CS32_MASK)) {
            /* XXX: try to avoid this test. The problem comes from the
               fact that is real mode or vm86 mode we only modify the
               'base' and 'selector' fields of the segment cache to go
               faster. A solution may be to force addseg to one in
               translate-i386.c. */
            new_hflags |= HF_ADDSEG_MASK;
        } else {
            new_hflags |= ((env->segs[R_DS].base | 
                            env->segs[R_ES].base |
                            env->segs[R_SS].base) != 0) << 
                HF_ADDSEG_SHIFT;
        }
        env->hflags = (env->hflags & 
                       ~(HF_SS32_MASK | HF_ADDSEG_MASK)) | new_hflags;
    }
}

/* wrapper, just in case memory mappings must be changed */
static inline void cpu_x86_set_cpl(CPUX86State *s, int cpl)
{
#if HF_CPL_MASK == 3
    s->hflags = (s->hflags & ~HF_CPL_MASK) | cpl;
#else
#error HF_CPL_MASK is hardcoded
#endif
}

/* used for debug or cpu save/restore */
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f);
CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper);

/* the following helpers are only usable in user mode simulation as
   they can trigger unexpected exceptions */
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector);
void cpu_x86_fsave(CPUX86State *s, uint8_t *ptr, int data32);
void cpu_x86_frstor(CPUX86State *s, uint8_t *ptr, int data32);

/* you can call this signal handler from your SIGBUS and SIGSEGV
   signal handlers to inform the virtual CPU of exceptions. non zero
   is returned if the signal was handled by the virtual CPU.  */
struct siginfo;
int cpu_x86_signal_handler(int host_signum, struct siginfo *info, 
                           void *puc);
void cpu_x86_set_a20(CPUX86State *env, int a20_state);

uint64_t cpu_get_tsc(CPUX86State *env);

void cpu_set_apic_base(CPUX86State *env, uint64_t val);
uint64_t cpu_get_apic_base(CPUX86State *env);
void cpu_set_apic_tpr(CPUX86State *env, uint8_t val);
#ifndef NO_CPU_IO_DEFS
uint8_t cpu_get_apic_tpr(CPUX86State *env);
#endif

/* will be suppressed */
void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0);

/* used to debug */
#define X86_DUMP_FPU  0x0001 /* dump FPU state too */
#define X86_DUMP_CCOP 0x0002 /* dump qemu flag cache */

#define TARGET_PAGE_BITS 12
#include "cpu-all.h"

#endif /* CPU_I386_H */
Commit	Line	Data
2c0262af FB	1	/*
	2	* i386 virtual CPU header
	3	*
	4	* Copyright (c) 2003 Fabrice Bellard
	5	*
	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.
	10	*
	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.
	15	*
	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
	19	*/
	20	#ifndef CPU_I386_H
	21	#define CPU_I386_H
	22
14ce26e7 FB	23	#include "config.h"
	24
	25	#ifdef TARGET_X86_64
	26	#define TARGET_LONG_BITS 64
	27	#else
3cf1e035	28	#define TARGET_LONG_BITS 32
14ce26e7	29	#endif
3cf1e035	30
d720b93d FB	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
	36
1fddef4b FB	37	#define TARGET_HAS_ICE 1
1fddef4b FB	38
2c0262af FB	39	#include "cpu-defs.h"
2c0262af FB	40
7a0e1f41 FB	41	#include "softfloat.h"
7a0e1f41 FB	42
58fe2f10 FB	43	#if defined(__i386__) && !defined(CONFIG_SOFTMMU)
	44	#define USE_CODE_COPY
	45	#endif
	46
2c0262af FB	47	#define R_EAX 0
	48	#define R_ECX 1
	49	#define R_EDX 2
	50	#define R_EBX 3
	51	#define R_ESP 4
	52	#define R_EBP 5
	53	#define R_ESI 6
	54	#define R_EDI 7
	55
	56	#define R_AL 0
	57	#define R_CL 1
	58	#define R_DL 2
	59	#define R_BL 3
	60	#define R_AH 4
	61	#define R_CH 5
	62	#define R_DH 6
	63	#define R_BH 7
	64
	65	#define R_ES 0
	66	#define R_CS 1
	67	#define R_SS 2
	68	#define R_DS 3
	69	#define R_FS 4
	70	#define R_GS 5
	71
	72	/* segment descriptor fields */
	73	#define DESC_G_MASK (1 << 23)
	74	#define DESC_B_SHIFT 22
	75	#define DESC_B_MASK (1 << DESC_B_SHIFT)
14ce26e7 FB	76	#define DESC_L_SHIFT 21 /* x86_64 only : 64 bit code segment */
14ce26e7 FB	77	#define DESC_L_MASK (1 << DESC_L_SHIFT)
2c0262af FB	78	#define DESC_AVL_MASK (1 << 20)
	79	#define DESC_P_MASK (1 << 15)
	80	#define DESC_DPL_SHIFT 13
	81	#define DESC_S_MASK (1 << 12)
	82	#define DESC_TYPE_SHIFT 8
	83	#define DESC_A_MASK (1 << 8)
	84
e670b89e FB	85	#define DESC_CS_MASK (1 << 11) /* 1=code segment 0=data segment */
	86	#define DESC_C_MASK (1 << 10) /* code: conforming */
	87	#define DESC_R_MASK (1 << 9) /* code: readable */
2c0262af	88
e670b89e FB	89	#define DESC_E_MASK (1 << 10) /* data: expansion direction */
	90	#define DESC_W_MASK (1 << 9) /* data: writable */
	91
	92	#define DESC_TSS_BUSY_MASK (1 << 9)
2c0262af FB	93
	94	/* eflags masks */
	95	#define CC_C 0x0001
	96	#define CC_P 0x0004
	97	#define CC_A 0x0010
	98	#define CC_Z 0x0040
	99	#define CC_S 0x0080
	100	#define CC_O 0x0800
	101
	102	#define TF_SHIFT 8
	103	#define IOPL_SHIFT 12
	104	#define VM_SHIFT 17
	105
	106	#define TF_MASK 0x00000100
	107	#define IF_MASK 0x00000200
	108	#define DF_MASK 0x00000400
	109	#define IOPL_MASK 0x00003000
	110	#define NT_MASK 0x00004000
	111	#define RF_MASK 0x00010000
	112	#define VM_MASK 0x00020000
	113	#define AC_MASK 0x00040000
	114	#define VIF_MASK 0x00080000
	115	#define VIP_MASK 0x00100000
	116	#define ID_MASK 0x00200000
	117
	118	/* hidden flags - used internally by qemu to represent additionnal cpu
	119	states. Only the CPL and INHIBIT_IRQ are not redundant. We avoid
	120	using the IOPL_MASK, TF_MASK and VM_MASK bit position to ease oring
	121	with eflags. */
	122	/* current cpl */
	123	#define HF_CPL_SHIFT 0
	124	/* true if soft mmu is being used */
	125	#define HF_SOFTMMU_SHIFT 2
	126	/* true if hardware interrupts must be disabled for next instruction */
	127	#define HF_INHIBIT_IRQ_SHIFT 3
	128	/* 16 or 32 segments */
	129	#define HF_CS32_SHIFT 4
	130	#define HF_SS32_SHIFT 5
dc196a57	131	/* zero base for DS, ES and SS : can be '0' only in 32 bit CS segment */
2c0262af	132	#define HF_ADDSEG_SHIFT 6
65262d57 FB	133	/* copy of CR0.PE (protected mode) */
	134	#define HF_PE_SHIFT 7
	135	#define HF_TF_SHIFT 8 /* must be same as eflags */
7eee2a50 FB	136	#define HF_MP_SHIFT 9 /* the order must be MP, EM, TS */
	137	#define HF_EM_SHIFT 10
	138	#define HF_TS_SHIFT 11
65262d57	139	#define HF_IOPL_SHIFT 12 /* must be same as eflags */
14ce26e7 FB	140	#define HF_LMA_SHIFT 14 /* only used on x86_64: long mode active */
14ce26e7 FB	141	#define HF_CS64_SHIFT 15 /* only used on x86_64: 64 bit code segment */
664e0f19	142	#define HF_OSFXSR_SHIFT 16 /* CR4.OSFXSR */
65262d57	143	#define HF_VM_SHIFT 17 /* must be same as eflags */
2c0262af FB	144
	145	#define HF_CPL_MASK (3 << HF_CPL_SHIFT)
	146	#define HF_SOFTMMU_MASK (1 << HF_SOFTMMU_SHIFT)
	147	#define HF_INHIBIT_IRQ_MASK (1 << HF_INHIBIT_IRQ_SHIFT)
	148	#define HF_CS32_MASK (1 << HF_CS32_SHIFT)
	149	#define HF_SS32_MASK (1 << HF_SS32_SHIFT)
	150	#define HF_ADDSEG_MASK (1 << HF_ADDSEG_SHIFT)
65262d57	151	#define HF_PE_MASK (1 << HF_PE_SHIFT)
58fe2f10	152	#define HF_TF_MASK (1 << HF_TF_SHIFT)
7eee2a50 FB	153	#define HF_MP_MASK (1 << HF_MP_SHIFT)
	154	#define HF_EM_MASK (1 << HF_EM_SHIFT)
	155	#define HF_TS_MASK (1 << HF_TS_SHIFT)
14ce26e7 FB	156	#define HF_LMA_MASK (1 << HF_LMA_SHIFT)
14ce26e7 FB	157	#define HF_CS64_MASK (1 << HF_CS64_SHIFT)
664e0f19	158	#define HF_OSFXSR_MASK (1 << HF_OSFXSR_SHIFT)
2c0262af FB	159
2c0262af FB	160	#define CR0_PE_MASK (1 << 0)
7eee2a50 FB	161	#define CR0_MP_MASK (1 << 1)
7eee2a50 FB	162	#define CR0_EM_MASK (1 << 2)
2c0262af	163	#define CR0_TS_MASK (1 << 3)
2ee73ac3	164	#define CR0_ET_MASK (1 << 4)
7eee2a50	165	#define CR0_NE_MASK (1 << 5)
2c0262af FB	166	#define CR0_WP_MASK (1 << 16)
	167	#define CR0_AM_MASK (1 << 18)
	168	#define CR0_PG_MASK (1 << 31)
	169
	170	#define CR4_VME_MASK (1 << 0)
	171	#define CR4_PVI_MASK (1 << 1)
	172	#define CR4_TSD_MASK (1 << 2)
	173	#define CR4_DE_MASK (1 << 3)
	174	#define CR4_PSE_MASK (1 << 4)
64a595f2 FB	175	#define CR4_PAE_MASK (1 << 5)
64a595f2 FB	176	#define CR4_PGE_MASK (1 << 7)
14ce26e7 FB	177	#define CR4_PCE_MASK (1 << 8)
	178	#define CR4_OSFXSR_MASK (1 << 9)
	179	#define CR4_OSXMMEXCPT_MASK (1 << 10)
2c0262af FB	180
	181	#define PG_PRESENT_BIT 0
	182	#define PG_RW_BIT 1
	183	#define PG_USER_BIT 2
	184	#define PG_PWT_BIT 3
	185	#define PG_PCD_BIT 4
	186	#define PG_ACCESSED_BIT 5
	187	#define PG_DIRTY_BIT 6
	188	#define PG_PSE_BIT 7
	189	#define PG_GLOBAL_BIT 8
	190
	191	#define PG_PRESENT_MASK (1 << PG_PRESENT_BIT)
	192	#define PG_RW_MASK (1 << PG_RW_BIT)
	193	#define PG_USER_MASK (1 << PG_USER_BIT)
	194	#define PG_PWT_MASK (1 << PG_PWT_BIT)
	195	#define PG_PCD_MASK (1 << PG_PCD_BIT)
	196	#define PG_ACCESSED_MASK (1 << PG_ACCESSED_BIT)
	197	#define PG_DIRTY_MASK (1 << PG_DIRTY_BIT)
	198	#define PG_PSE_MASK (1 << PG_PSE_BIT)
	199	#define PG_GLOBAL_MASK (1 << PG_GLOBAL_BIT)
	200
	201	#define PG_ERROR_W_BIT 1
	202
	203	#define PG_ERROR_P_MASK 0x01
	204	#define PG_ERROR_W_MASK (1 << PG_ERROR_W_BIT)
	205	#define PG_ERROR_U_MASK 0x04
	206	#define PG_ERROR_RSVD_MASK 0x08
	207
	208	#define MSR_IA32_APICBASE 0x1b
	209	#define MSR_IA32_APICBASE_BSP (1<<8)
	210	#define MSR_IA32_APICBASE_ENABLE (1<<11)
	211	#define MSR_IA32_APICBASE_BASE (0xfffff<<12)
	212
	213	#define MSR_IA32_SYSENTER_CS 0x174
	214	#define MSR_IA32_SYSENTER_ESP 0x175
	215	#define MSR_IA32_SYSENTER_EIP 0x176
	216
14ce26e7 FB	217	#define MSR_EFER 0xc0000080
	218
	219	#define MSR_EFER_SCE (1 << 0)
	220	#define MSR_EFER_LME (1 << 8)
	221	#define MSR_EFER_LMA (1 << 10)
	222	#define MSR_EFER_NXE (1 << 11)
	223	#define MSR_EFER_FFXSR (1 << 14)
	224
	225	#define MSR_STAR 0xc0000081
	226	#define MSR_LSTAR 0xc0000082
	227	#define MSR_CSTAR 0xc0000083
	228	#define MSR_FMASK 0xc0000084
	229	#define MSR_FSBASE 0xc0000100
	230	#define MSR_GSBASE 0xc0000101
	231	#define MSR_KERNELGSBASE 0xc0000102
	232
	233	/* cpuid_features bits */
	234	#define CPUID_FP87 (1 << 0)
	235	#define CPUID_VME (1 << 1)
	236	#define CPUID_DE (1 << 2)
	237	#define CPUID_PSE (1 << 3)
	238	#define CPUID_TSC (1 << 4)
	239	#define CPUID_MSR (1 << 5)
	240	#define CPUID_PAE (1 << 6)
	241	#define CPUID_MCE (1 << 7)
	242	#define CPUID_CX8 (1 << 8)
	243	#define CPUID_APIC (1 << 9)
	244	#define CPUID_SEP (1 << 11) /* sysenter/sysexit */
	245	#define CPUID_MTRR (1 << 12)
	246	#define CPUID_PGE (1 << 13)
	247	#define CPUID_MCA (1 << 14)
	248	#define CPUID_CMOV (1 << 15)
	249	/* ... */
	250	#define CPUID_MMX (1 << 23)
	251	#define CPUID_FXSR (1 << 24)
	252	#define CPUID_SSE (1 << 25)
	253	#define CPUID_SSE2 (1 << 26)
	254
9df217a3 FB	255	#define CPUID_EXT_SS3 (1 << 0)
	256	#define CPUID_EXT_MONITOR (1 << 3)
	257	#define CPUID_EXT_CX16 (1 << 13)
	258
	259	#define CPUID_EXT2_SYSCALL (1 << 11)
	260	#define CPUID_EXT2_NX (1 << 20)
8d9bfc2b	261	#define CPUID_EXT2_FFXSR (1 << 25)
9df217a3 FB	262	#define CPUID_EXT2_LM (1 << 29)
9df217a3 FB	263
2c0262af FB	264	#define EXCP00_DIVZ 0
	265	#define EXCP01_SSTP 1
	266	#define EXCP02_NMI 2
	267	#define EXCP03_INT3 3
	268	#define EXCP04_INTO 4
	269	#define EXCP05_BOUND 5
	270	#define EXCP06_ILLOP 6
	271	#define EXCP07_PREX 7
	272	#define EXCP08_DBLE 8
	273	#define EXCP09_XERR 9
	274	#define EXCP0A_TSS 10
	275	#define EXCP0B_NOSEG 11
	276	#define EXCP0C_STACK 12
	277	#define EXCP0D_GPF 13
	278	#define EXCP0E_PAGE 14
	279	#define EXCP10_COPR 16
	280	#define EXCP11_ALGN 17
	281	#define EXCP12_MCHK 18
	282
	283	enum {
	284	CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
	285	CC_OP_EFLAGS, /* all cc are explicitely computed, CC_SRC = flags */
d36cd60e FB	286
	287	CC_OP_MULB, /* modify all flags, C, O = (CC_SRC != 0) */
	288	CC_OP_MULW,
	289	CC_OP_MULL,
14ce26e7	290	CC_OP_MULQ,
2c0262af FB	291
	292	CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
	293	CC_OP_ADDW,
	294	CC_OP_ADDL,
14ce26e7	295	CC_OP_ADDQ,
2c0262af FB	296
	297	CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
	298	CC_OP_ADCW,
	299	CC_OP_ADCL,
14ce26e7	300	CC_OP_ADCQ,
2c0262af FB	301
	302	CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
	303	CC_OP_SUBW,
	304	CC_OP_SUBL,
14ce26e7	305	CC_OP_SUBQ,
2c0262af FB	306
	307	CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
	308	CC_OP_SBBW,
	309	CC_OP_SBBL,
14ce26e7	310	CC_OP_SBBQ,
2c0262af FB	311
	312	CC_OP_LOGICB, /* modify all flags, CC_DST = res */
	313	CC_OP_LOGICW,
	314	CC_OP_LOGICL,
14ce26e7	315	CC_OP_LOGICQ,
2c0262af FB	316
	317	CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */
	318	CC_OP_INCW,
	319	CC_OP_INCL,
14ce26e7	320	CC_OP_INCQ,
2c0262af FB	321
	322	CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C */
	323	CC_OP_DECW,
	324	CC_OP_DECL,
14ce26e7	325	CC_OP_DECQ,
2c0262af	326
6b652794	327	CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.msb = C */
2c0262af FB	328	CC_OP_SHLW,
2c0262af FB	329	CC_OP_SHLL,
14ce26e7	330	CC_OP_SHLQ,
2c0262af FB	331
	332	CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
	333	CC_OP_SARW,
	334	CC_OP_SARL,
14ce26e7	335	CC_OP_SARQ,
2c0262af FB	336
	337	CC_OP_NB,
	338	};
	339
7a0e1f41	340	#ifdef FLOATX80
2c0262af FB	341	#define USE_X86LDOUBLE
	342	#endif
	343
	344	#ifdef USE_X86LDOUBLE
7a0e1f41	345	typedef floatx80 CPU86_LDouble;
2c0262af	346	#else
7a0e1f41	347	typedef float64 CPU86_LDouble;
2c0262af FB	348	#endif
	349
	350	typedef struct SegmentCache {
	351	uint32_t selector;
14ce26e7	352	target_ulong base;
2c0262af FB	353	uint32_t limit;
	354	uint32_t flags;
	355	} SegmentCache;
	356
826461bb	357	typedef union {
664e0f19 FB	358	uint8_t _b[16];
	359	uint16_t _w[8];
	360	uint32_t _l[4];
	361	uint64_t _q[2];
7a0e1f41 FB	362	float32 _s[4];
7a0e1f41 FB	363	float64 _d[2];
14ce26e7 FB	364	} XMMReg;
14ce26e7 FB	365
826461bb FB	366	typedef union {
	367	uint8_t _b[8];
	368	uint16_t _w[2];
	369	uint32_t _l[1];
	370	uint64_t q;
	371	} MMXReg;
	372
	373	#ifdef WORDS_BIGENDIAN
	374	#define XMM_B(n) _b[15 - (n)]
	375	#define XMM_W(n) _w[7 - (n)]
	376	#define XMM_L(n) _l[3 - (n)]
664e0f19	377	#define XMM_S(n) _s[3 - (n)]
826461bb	378	#define XMM_Q(n) _q[1 - (n)]
664e0f19	379	#define XMM_D(n) _d[1 - (n)]
826461bb FB	380
	381	#define MMX_B(n) _b[7 - (n)]
	382	#define MMX_W(n) _w[3 - (n)]
	383	#define MMX_L(n) _l[1 - (n)]
	384	#else
	385	#define XMM_B(n) _b[n]
	386	#define XMM_W(n) _w[n]
	387	#define XMM_L(n) _l[n]
664e0f19	388	#define XMM_S(n) _s[n]
826461bb	389	#define XMM_Q(n) _q[n]
664e0f19	390	#define XMM_D(n) _d[n]
826461bb FB	391
	392	#define MMX_B(n) _b[n]
	393	#define MMX_W(n) _w[n]
	394	#define MMX_L(n) _l[n]
	395	#endif
664e0f19	396	#define MMX_Q(n) q
826461bb	397
14ce26e7 FB	398	#ifdef TARGET_X86_64
	399	#define CPU_NB_REGS 16
	400	#else
	401	#define CPU_NB_REGS 8
	402	#endif
	403
2c0262af	404	typedef struct CPUX86State {
14ce26e7 FB	405	#if TARGET_LONG_BITS > HOST_LONG_BITS
	406	/* temporaries if we cannot store them in host registers */
	407	target_ulong t0, t1, t2;
	408	#endif
	409
2c0262af	410	/* standard registers */
14ce26e7 FB	411	target_ulong regs[CPU_NB_REGS];
	412	target_ulong eip;
	413	target_ulong eflags; /* eflags register. During CPU emulation, CC
2c0262af FB	414	flags and DF are set to zero because they are
	415	stored elsewhere */
	416
	417	/* emulator internal eflags handling */
14ce26e7 FB	418	target_ulong cc_src;
14ce26e7 FB	419	target_ulong cc_dst;
2c0262af FB	420	uint32_t cc_op;
	421	int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
	422	uint32_t hflags; /* hidden flags, see HF_xxx constants */
	423
9df217a3 FB	424	/* segments */
	425	SegmentCache segs[6]; /* selector values */
	426	SegmentCache ldt;
	427	SegmentCache tr;
	428	SegmentCache gdt; /* only base and limit are used */
	429	SegmentCache idt; /* only base and limit are used */
	430
	431	target_ulong cr[5]; /* NOTE: cr1 is unused */
	432	uint32_t a20_mask;
	433
2c0262af FB	434	/* FPU state */
	435	unsigned int fpstt; /* top of stack index */
	436	unsigned int fpus;
	437	unsigned int fpuc;
	438	uint8_t fptags[8]; /* 0 = valid, 1 = empty */
664e0f19 FB	439	union {
	440	#ifdef USE_X86LDOUBLE
	441	CPU86_LDouble d __attribute__((aligned(16)));
	442	#else
	443	CPU86_LDouble d;
	444	#endif
	445	MMXReg mmx;
	446	} fpregs[8];
2c0262af FB	447
2c0262af FB	448	/* emulator internal variables */
7a0e1f41	449	float_status fp_status;
2c0262af FB	450	CPU86_LDouble ft0;
	451	union {
	452	float f;
	453	double d;
	454	int i32;
	455	int64_t i64;
	456	} fp_convert;
	457
7a0e1f41	458	float_status sse_status;
664e0f19	459	uint32_t mxcsr;
14ce26e7 FB	460	XMMReg xmm_regs[CPU_NB_REGS];
14ce26e7 FB	461	XMMReg xmm_t0;
664e0f19	462	MMXReg mmx_t0;
14ce26e7	463
2c0262af FB	464	/* sysenter registers */
	465	uint32_t sysenter_cs;
	466	uint32_t sysenter_esp;
	467	uint32_t sysenter_eip;
8d9bfc2b FB	468	uint64_t efer;
8d9bfc2b FB	469	uint64_t star;
14ce26e7	470	#ifdef TARGET_X86_64
14ce26e7 FB	471	target_ulong lstar;
	472	target_ulong cstar;
	473	target_ulong fmask;
	474	target_ulong kernelgsbase;
	475	#endif
58fe2f10 FB	476
58fe2f10 FB	477	/* temporary data for USE_CODE_COPY mode */
7eee2a50	478	#ifdef USE_CODE_COPY
58fe2f10 FB	479	uint32_t tmp0;
58fe2f10 FB	480	uint32_t saved_esp;
7eee2a50 FB	481	int native_fp_regs; /* if true, the FPU state is in the native CPU regs */
7eee2a50 FB	482	#endif
2c0262af FB	483
	484	/* exception/interrupt handling */
	485	jmp_buf jmp_env;
	486	int exception_index;
	487	int error_code;
	488	int exception_is_int;
826461bb	489	target_ulong exception_next_eip;
2c0262af	490	struct TranslationBlock current_tb; / currently executing TB */
14ce26e7	491	target_ulong dr[8]; /* debug registers */
2c0262af FB	492	int interrupt_request;
	493	int user_mode_only; /* user mode only simulation */
	494
d720b93d FB	495	/* soft mmu support */
	496	/* in order to avoid passing too many arguments to the memory
	497	write helpers, we store some rarely used information in the CPU
	498	context) */
	499	unsigned long mem_write_pc; /* host pc at which the memory was
	500	written */
14ce26e7 FB	501	target_ulong mem_write_vaddr; /* target virtual addr at which the
14ce26e7 FB	502	memory was written */
2c0262af FB	503	/* 0 = kernel, 1 = user */
	504	CPUTLBEntry tlb_read[2][CPU_TLB_SIZE];
	505	CPUTLBEntry tlb_write[2][CPU_TLB_SIZE];
	506
ffddfee3	507	/* from this point: preserved by CPU reset */
2c0262af	508	/* ice debug support */
14ce26e7	509	target_ulong breakpoints[MAX_BREAKPOINTS];
2c0262af FB	510	int nb_breakpoints;
	511	int singlestep_enabled;
	512
14ce26e7	513	/* processor features (e.g. for CPUID insn) */
8d9bfc2b	514	uint32_t cpuid_level;
14ce26e7 FB	515	uint32_t cpuid_vendor1;
	516	uint32_t cpuid_vendor2;
	517	uint32_t cpuid_vendor3;
	518	uint32_t cpuid_version;
	519	uint32_t cpuid_features;
9df217a3	520	uint32_t cpuid_ext_features;
8d9bfc2b FB	521	uint32_t cpuid_xlevel;
	522	uint32_t cpuid_model[12];
	523	uint32_t cpuid_ext2_features;
	524
9df217a3 FB	525	#ifdef USE_KQEMU
	526	int kqemu_enabled;
	527	#endif
14ce26e7 FB	528	/* in order to simplify APIC support, we leave this pointer to the
	529	user */
	530	struct APICState *apic_state;
2c0262af FB	531	/* user data */
	532	void *opaque;
	533	} CPUX86State;
	534
2c0262af FB	535	CPUX86State *cpu_x86_init(void);
	536	int cpu_x86_exec(CPUX86State *s);
	537	void cpu_x86_close(CPUX86State *s);
d720b93d	538	int cpu_get_pic_interrupt(CPUX86State *s);
2ee73ac3 FB	539	/* MSDOS compatibility mode FPU exception support */
2ee73ac3 FB	540	void cpu_set_ferr(CPUX86State *s);
2c0262af FB	541
	542	/* this function must always be used to load data in the segment
	543	cache: it synchronizes the hflags with the segment cache values */
	544	static inline void cpu_x86_load_seg_cache(CPUX86State *env,
	545	int seg_reg, unsigned int selector,
14ce26e7	546	uint32_t base, unsigned int limit,
2c0262af FB	547	unsigned int flags)
	548	{
	549	SegmentCache *sc;
	550	unsigned int new_hflags;
	551
	552	sc = &env->segs[seg_reg];
	553	sc->selector = selector;
	554	sc->base = base;
	555	sc->limit = limit;
	556	sc->flags = flags;
	557
	558	/* update the hidden flags */
14ce26e7 FB	559	{
	560	if (seg_reg == R_CS) {
	561	#ifdef TARGET_X86_64
	562	if ((env->hflags & HF_LMA_MASK) && (flags & DESC_L_MASK)) {
	563	/* long mode */
	564	env->hflags \|= HF_CS32_MASK \| HF_SS32_MASK \| HF_CS64_MASK;
	565	env->hflags &= ~(HF_ADDSEG_MASK);
	566	} else
	567	#endif
	568	{
	569	/* legacy / compatibility case */
	570	new_hflags = (env->segs[R_CS].flags & DESC_B_MASK)
	571	>> (DESC_B_SHIFT - HF_CS32_SHIFT);
	572	env->hflags = (env->hflags & ~(HF_CS32_MASK \| HF_CS64_MASK)) \|
	573	new_hflags;
	574	}
	575	}
	576	new_hflags = (env->segs[R_SS].flags & DESC_B_MASK)
	577	>> (DESC_B_SHIFT - HF_SS32_SHIFT);
	578	if (env->hflags & HF_CS64_MASK) {
	579	/* zero base assumed for DS, ES and SS in long mode */
	580	} else if (!(env->cr[0] & CR0_PE_MASK) \|\|
735a8fd3 FB	581	(env->eflags & VM_MASK) \|\|
735a8fd3 FB	582	!(env->hflags & HF_CS32_MASK)) {
14ce26e7 FB	583	/* XXX: try to avoid this test. The problem comes from the
	584	fact that is real mode or vm86 mode we only modify the
	585	'base' and 'selector' fields of the segment cache to go
	586	faster. A solution may be to force addseg to one in
	587	translate-i386.c. */
	588	new_hflags \|= HF_ADDSEG_MASK;
	589	} else {
735a8fd3 FB	590	new_hflags \|= ((env->segs[R_DS].base \|
	591	env->segs[R_ES].base \|
	592	env->segs[R_SS].base) != 0) <<
14ce26e7 FB	593	HF_ADDSEG_SHIFT;
	594	}
	595	env->hflags = (env->hflags &
	596	~(HF_SS32_MASK \| HF_ADDSEG_MASK)) \| new_hflags;
2c0262af	597	}
2c0262af FB	598	}
	599
	600	/* wrapper, just in case memory mappings must be changed */
	601	static inline void cpu_x86_set_cpl(CPUX86State *s, int cpl)
	602	{
	603	#if HF_CPL_MASK == 3
	604	s->hflags = (s->hflags & ~HF_CPL_MASK) \| cpl;
	605	#else
	606	#error HF_CPL_MASK is hardcoded
	607	#endif
	608	}
	609
1f1af9fd FB	610	/* used for debug or cpu save/restore */
	611	void cpu_get_fp80(uint64_t pmant, uint16_t pexp, CPU86_LDouble f);
	612	CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper);
	613
2c0262af FB	614	/* the following helpers are only usable in user mode simulation as
	615	they can trigger unexpected exceptions */
	616	void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector);
	617	void cpu_x86_fsave(CPUX86State s, uint8_t ptr, int data32);
	618	void cpu_x86_frstor(CPUX86State s, uint8_t ptr, int data32);
	619
	620	/* you can call this signal handler from your SIGBUS and SIGSEGV
	621	signal handlers to inform the virtual CPU of exceptions. non zero
	622	is returned if the signal was handled by the virtual CPU. */
	623	struct siginfo;
	624	int cpu_x86_signal_handler(int host_signum, struct siginfo *info,
	625	void *puc);
461c0471	626	void cpu_x86_set_a20(CPUX86State *env, int a20_state);
2c0262af	627
28ab0e2e FB	628	uint64_t cpu_get_tsc(CPUX86State *env);
28ab0e2e FB	629
14ce26e7 FB	630	void cpu_set_apic_base(CPUX86State *env, uint64_t val);
14ce26e7 FB	631	uint64_t cpu_get_apic_base(CPUX86State *env);
9230e66e FB	632	void cpu_set_apic_tpr(CPUX86State *env, uint8_t val);
	633	#ifndef NO_CPU_IO_DEFS
	634	uint8_t cpu_get_apic_tpr(CPUX86State *env);
	635	#endif
14ce26e7	636
64a595f2 FB	637	/* will be suppressed */
	638	void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0);
	639
2c0262af FB	640	/* used to debug */
	641	#define X86_DUMP_FPU 0x0001 /* dump FPU state too */
	642	#define X86_DUMP_CCOP 0x0002 /* dump qemu flag cache */
2c0262af FB	643
	644	#define TARGET_PAGE_BITS 12
	645	#include "cpu-all.h"
	646
	647	#endif /* CPU_I386_H */