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Add emulation of System Management Mode.

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This commit is contained in:
SarahW 2020-10-31 20:30:10 +00:00
commit 0cbbd22c88
8 changed files with 295 additions and 38 deletions
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10
src/x86.h
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@ -40,7 +40,7 @@ typedef struct
{
uint32_t base;
uint32_t limit;
uint8_t access;
uint8_t access, access2;
uint16_t seg;
uint32_t limit_low, limit_high;
int checked; /*Non-zero if selector is known to be valid*/
@ -90,6 +90,7 @@ struct
int8_t ssegs;
int8_t ismmx;
int8_t abrt;
int8_t smi_pending;
int _cycles;
int cpu_recomp_ins;
@ -118,6 +119,8 @@ struct
} CR0;
uint16_t flags, eflags;
uint32_t smbase;
} cpu_state;
#define cpu_state_offset(MEMBER) ((uintptr_t)&cpu_state.MEMBER - (uintptr_t)&cpu_state - 128)
@ -187,6 +190,7 @@ extern uint16_t cpu_cur_status;
#define CPU_STATUS_STACK32 (1 << 1)
#define CPU_STATUS_PMODE (1 << 2)
#define CPU_STATUS_V86 (1 << 3)
#define CPU_STATUS_SMM (1 << 4)
#define CPU_STATUS_FLAGS 0xff
/*If the flags below are set in cpu_cur_status, they must be set in block->status.
@ -316,4 +320,8 @@ int idivl(int32_t val);
extern int cpu_end_block_after_ins;
void x86_smi_trigger(void);
void x86_smi_enter(void);
void x86_smi_leave(void);
#endif