diff options
Diffstat (limited to 'trunk/src/emu/cpu/i86/instr286.h')
-rw-r--r-- | trunk/src/emu/cpu/i86/instr286.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/i86/instr286.h b/trunk/src/emu/cpu/i86/instr286.h new file mode 100644 index 00000000000..eeb582b67e9 --- /dev/null +++ b/trunk/src/emu/cpu/i86/instr286.h @@ -0,0 +1,48 @@ +#define DIVIDE_BY_ZERO 0 +#define SINGLE_STEP 1 +#define NMI 2 +#define BREAK 3 +#define INTO_OVERFLOW 4 +#define BOUND_OVERRUN 5 +#define ILLEGAL_INSTRUCTION 6 +#define FPU_UNAVAILABLE 7 +#define DOUBLE_FAULT 8 +#define FPU_SEG_OVERRUN 9 +#define INVALID_TSS 10 +#define SEG_NOT_PRESENT 11 +#define STACK_FAULT 12 +#define GENERAL_PROTECTION_FAULT 13 + +#define CPL (cpustate->sregs[CS]&3) +#define PM (cpustate->msw&1) + +static void i80286_trap2(i80286_state *cpustate,UINT32 error); +static void i80286_interrupt_descriptor(i80286_state *cpustate,UINT16 number, int trap, int error); +static void i80286_code_descriptor(i80286_state *cpustate,UINT16 selector, UINT16 offset, int gate); +static void i80286_data_descriptor(i80286_state *cpustate,int reg, UINT16 selector); +static void PREFIX286(_0fpre)(i80286_state *cpustate); +static void PREFIX286(_arpl)(i80286_state *cpustate); +static void PREFIX286(_escape_7)(i8086_state *cpustate); +static void i80286_pop_seg(i80286_state *cpustate,int reg); +static void i80286_load_flags(i80286_state *cpustate, UINT16 flags, int cpl); + +enum i80286_size +{ + I80286_BYTE = 1, + I80286_WORD = 2 +}; + +enum i80286_operation +{ + I80286_READ = 1, + I80286_WRITE, + I80286_EXECUTE +}; + +static void i80286_check_permission(i8086_state *cpustate, UINT8 check_seg, UINT32 offset, UINT16 size, i80286_operation operation); + +static inline UINT32 GetMemAddr(i80286_state *cpustate, UINT8 seg, UINT32 off, UINT16 size, i80286_operation op) { + seg = DefaultSeg(seg); + if(PM) i80286_check_permission(cpustate, seg, off, size, op); + return (cpustate->base[seg] + off) & AMASK; +} |