view m68k_to_x86.h @ 103:a71544cd01ea

Don't pre-emptively translate code at interrupt vectors as some PD ROMs have these pointing at junk. Need some kind of heuristic for detecting garbage if I'm going to translate them ahead of time by default.
author Mike Pavone <pavone@retrodev.com>
date Thu, 27 Dec 2012 22:48:54 -0800
parents dd3c680c618c
children 94a65fb4e1c7
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#include <stdint.h>
#include "68kinst.h"

#define NUM_MEM_AREAS 4
#define NATIVE_MAP_CHUNKS (64*1024)
#define NATIVE_CHUNK_SIZE ((16 * 1024 * 1024 / NATIVE_MAP_CHUNKS)/2)
#define INVALID_OFFSET 0xFFFFFFFF

typedef struct {
	uint8_t  *base;
	int32_t *offsets;
} native_map_slot;

typedef struct deferred_addr {
	struct deferred_addr *next;
	uint8_t              *dest;
	uint32_t             address;
} deferred_addr;

typedef struct {
	uint32_t        flags;
	int8_t          dregs[8];
	int8_t          aregs[8];
	native_map_slot *native_code_map;
	deferred_addr   *deferred;
	uint8_t         *cur_code;
	uint8_t         *code_end;
} x86_68k_options;

typedef struct {
	uint8_t         flags[5];
	uint8_t         status;
	uint16_t        reserved;
	uint32_t        dregs[8];
	uint32_t        aregs[9];
	uint32_t		target_cycle; //cycle at which the next synchronization or interrupt occurs
	uint32_t		current_cycle;
	uint32_t        sync_cycle;
	uint32_t        int_cycle;
	uint32_t        int_num;
	uint16_t        *mem_pointers[NUM_MEM_AREAS];
	void            *next_context;
	uint16_t        value;
	
	native_map_slot *native_code_map;
	void            *options;
} m68k_context;

uint8_t * translate_m68k(uint8_t * dst, m68kinst * inst, x86_68k_options * opts);
uint8_t * translate_m68k_stream(uint32_t address, m68k_context * context);
void start_68k_context(m68k_context * context, uint32_t address);
void init_x86_68k_opts(x86_68k_options * opts);
void init_68k_context(m68k_context * context, native_map_slot * native_code_map, void * opts);
void m68k_reset(m68k_context * context);