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
51 /* segment descriptor fields */
52 #define DESC_G_MASK (1 << 23)
53 #define DESC_B_SHIFT 22
54 #define DESC_B_MASK (1 << DESC_B_SHIFT)
55 #define DESC_AVL_MASK (1 << 20)
56 #define DESC_P_MASK (1 << 15)
57 #define DESC_DPL_SHIFT 13
58 #define DESC_S_MASK (1 << 12)
59 #define DESC_TYPE_SHIFT 8
60 #define DESC_A_MASK (1 << 8)
62 #define DESC_CS_MASK (1 << 11)
63 #define DESC_C_MASK (1 << 10)
64 #define DESC_R_MASK (1 << 9)
66 #define DESC_E_MASK (1 << 10)
67 #define DESC_W_MASK (1 << 9)
77 #define TF_MASK 0x00000100
78 #define IF_MASK 0x00000200
79 #define DF_MASK 0x00000400
80 #define IOPL_MASK 0x00003000
81 #define NT_MASK 0x00004000
82 #define RF_MASK 0x00010000
83 #define VM_MASK 0x00020000
84 #define AC_MASK 0x00040000
85 #define VIF_MASK 0x00080000
86 #define VIP_MASK 0x00100000
87 #define ID_MASK 0x00200000
89 #define CR0_PE_MASK (1 << 0)
90 #define CR0_TS_MASK (1 << 3)
91 #define CR0_WP_MASK (1 << 16)
92 #define CR0_AM_MASK (1 << 18)
93 #define CR0_PG_MASK (1 << 31)
95 #define CR4_VME_MASK (1 << 0)
96 #define CR4_PVI_MASK (1 << 1)
97 #define CR4_TSD_MASK (1 << 2)
98 #define CR4_DE_MASK (1 << 3)
99 #define CR4_PSE_MASK (1 << 4)
101 #define PG_PRESENT_BIT 0
103 #define PG_USER_BIT 2
106 #define PG_ACCESSED_BIT 5
107 #define PG_DIRTY_BIT 6
109 #define PG_GLOBAL_BIT 8
111 #define PG_PRESENT_MASK (1 << PG_PRESENT_BIT)
112 #define PG_RW_MASK (1 << PG_RW_BIT)
113 #define PG_USER_MASK (1 << PG_USER_BIT)
114 #define PG_PWT_MASK (1 << PG_PWT_BIT)
115 #define PG_PCD_MASK (1 << PG_PCD_BIT)
116 #define PG_ACCESSED_MASK (1 << PG_ACCESSED_BIT)
117 #define PG_DIRTY_MASK (1 << PG_DIRTY_BIT)
118 #define PG_PSE_MASK (1 << PG_PSE_BIT)
119 #define PG_GLOBAL_MASK (1 << PG_GLOBAL_BIT)
121 #define PG_ERROR_W_BIT 1
123 #define PG_ERROR_P_MASK 0x01
124 #define PG_ERROR_W_MASK (1 << PG_ERROR_W_BIT)
125 #define PG_ERROR_U_MASK 0x04
126 #define PG_ERROR_RSVD_MASK 0x08
128 #define EXCP00_DIVZ 0
129 #define EXCP01_SSTP 1
131 #define EXCP03_INT3 3
132 #define EXCP04_INTO 4
133 #define EXCP05_BOUND 5
134 #define EXCP06_ILLOP 6
135 #define EXCP07_PREX 7
136 #define EXCP08_DBLE 8
137 #define EXCP09_XERR 9
138 #define EXCP0A_TSS 10
139 #define EXCP0B_NOSEG 11
140 #define EXCP0C_STACK 12
141 #define EXCP0D_GPF 13
142 #define EXCP0E_PAGE 14
143 #define EXCP10_COPR 16
144 #define EXCP11_ALGN 17
145 #define EXCP12_MCHK 18
147 #define EXCP_INTERRUPT 256 /* async interruption */
148 #define EXCP_HLT 257 /* hlt instruction reached */
151 CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
152 CC_OP_EFLAGS, /* all cc are explicitely computed, CC_SRC = flags */
153 CC_OP_MUL, /* modify all flags, C, O = (CC_SRC != 0) */
155 CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
159 CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
163 CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
167 CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
171 CC_OP_LOGICB, /* modify all flags, CC_DST = res */
175 CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */
179 CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C */
183 CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
187 CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
195 #define USE_X86LDOUBLE
198 #ifdef USE_X86LDOUBLE
199 typedef long double CPU86_LDouble;
201 typedef double CPU86_LDouble;
204 typedef struct SegmentCache {
211 typedef struct CPUX86State {
212 /* standard registers */
215 uint32_t eflags; /* eflags register. During CPU emulation, CC
216 flags and DF are set to zero because they are
219 /* emulator internal eflags handling */
223 int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
226 unsigned int fpstt; /* top of stack index */
229 uint8_t fptags[8]; /* 0 = valid, 1 = empty */
230 CPU86_LDouble fpregs[8];
232 /* emulator internal variables */
242 SegmentCache segs[6]; /* selector values */
245 SegmentCache gdt; /* only base and limit are used */
246 SegmentCache idt; /* only base and limit are used */
248 /* exception/interrupt handling */
252 int exception_is_int;
253 int exception_next_eip;
254 struct TranslationBlock *current_tb; /* currently executing TB */
255 uint32_t cr[5]; /* NOTE: cr1 is unused */
256 uint32_t dr[8]; /* debug registers */
257 int interrupt_request; /* if true, will exit from cpu_exec() ASAP */
258 /* if true, will call cpu_x86_get_pic_interrupt() ASAP to get the
259 request interrupt number */
260 int hard_interrupt_request;
261 int user_mode_only; /* user mode only simulation */
268 void cpu_x86_outb(CPUX86State *env, int addr, int val);
269 void cpu_x86_outw(CPUX86State *env, int addr, int val);
270 void cpu_x86_outl(CPUX86State *env, int addr, int val);
271 int cpu_x86_inb(CPUX86State *env, int addr);
272 int cpu_x86_inw(CPUX86State *env, int addr);
273 int cpu_x86_inl(CPUX86State *env, int addr);
276 CPUX86State *cpu_x86_init(void);
277 int cpu_x86_exec(CPUX86State *s);
278 void cpu_x86_interrupt(CPUX86State *s);
279 void cpu_x86_close(CPUX86State *s);
280 int cpu_x86_get_pic_interrupt(CPUX86State *s);
282 /* needed to load some predefinied segment registers */
283 void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector);
285 /* simulate fsave/frstor */
286 void cpu_x86_fsave(CPUX86State *s, uint8_t *ptr, int data32);
287 void cpu_x86_frstor(CPUX86State *s, uint8_t *ptr, int data32);
289 /* you can call this signal handler from your SIGBUS and SIGSEGV
290 signal handlers to inform the virtual CPU of exceptions. non zero
291 is returned if the signal was handled by the virtual CPU. */
293 int cpu_x86_signal_handler(int host_signum, struct siginfo *info,
297 void cpu_x86_init_mmu(CPUX86State *env);
298 extern int phys_ram_size;
299 extern int phys_ram_fd;
300 extern uint8_t *phys_ram_base;
303 #define X86_DUMP_FPU 0x0001 /* dump FPU state too */
304 #define X86_DUMP_CCOP 0x0002 /* dump qemu flag cache */
305 void cpu_x86_dump_state(CPUX86State *env, FILE *f, int flags);
307 #define TARGET_PAGE_BITS 12
310 #endif /* CPU_I386_H */