1/*
  2 Copyright 2013 Michael Pavone
  3 This file is part of BlastEm.
  4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
  5*/
  6#ifndef M68K_CORE_H_
  7#define M68K_CORE_H_
  8#include <stdint.h>
  9#include <stdio.h>
 10#include "backend.h"
 11#include "serialize.h"
 12//#include "68kinst.h"
 13struct m68kinst;
 14
 15#define NUM_MEM_AREAS 8
 16#define NATIVE_MAP_CHUNKS (64*1024)
 17#define NATIVE_CHUNK_SIZE ((16 * 1024 * 1024 / NATIVE_MAP_CHUNKS))
 18#define MAX_NATIVE_SIZE 255
 19
 20#define M68K_OPT_BROKEN_READ_MODIFY 1
 21
 22#define INT_PENDING_SR_CHANGE 254
 23#define INT_PENDING_NONE 255
 24
 25#define M68K_STATUS_TRACE 0x80
 26
 27typedef void (*start_fun)(uint8_t * addr, void * context);
 28
 29typedef struct {
 30	code_ptr impl;
 31	uint16_t reglist;
 32	uint8_t  reg_to_mem;
 33	uint8_t  size;
 34	int8_t   dir;
 35} movem_fun;
 36
 37typedef struct {
 38	cpu_options     gen;
 39
 40	int8_t          dregs[8];
 41	int8_t          aregs[8];
 42	int8_t			flag_regs[5];
 43	FILE            *address_log;
 44	code_ptr        read_16;
 45	code_ptr        write_16;
 46	code_ptr        read_8;
 47	code_ptr        write_8;
 48	code_ptr        read_32;
 49	code_ptr        write_32_lowfirst;
 50	code_ptr        write_32_highfirst;
 51	code_ptr        do_sync;
 52	code_ptr        handle_int_latch;
 53	code_ptr        trap;
 54	start_fun       start_context;
 55	code_ptr        retrans_stub;
 56	code_ptr        native_addr;
 57	code_ptr        native_addr_and_sync;
 58	code_ptr		get_sr;
 59	code_ptr		set_sr;
 60	code_ptr		set_ccr;
 61	code_ptr        bp_stub;
 62	code_info       extra_code;
 63	movem_fun       *big_movem;
 64	uint32_t        num_movem;
 65	uint32_t        movem_storage;
 66	code_word       prologue_start;
 67} m68k_options;
 68
 69typedef struct m68k_context m68k_context;
 70typedef void (*m68k_debug_handler)(m68k_context *context, uint32_t pc);
 71
 72typedef struct {
 73	m68k_debug_handler handler;
 74	uint32_t           address;
 75} m68k_breakpoint;
 76
 77struct m68k_context {
 78	uint8_t         flags[5];
 79	uint8_t         status;
 80	uint16_t        int_ack;
 81	uint32_t        dregs[8];
 82	uint32_t        aregs[9];
 83	uint32_t		target_cycle; //cycle at which the next synchronization or interrupt occurs
 84	uint32_t		current_cycle;
 85	uint32_t        sync_cycle;
 86	uint32_t        int_cycle;
 87	uint32_t        int_num;
 88	uint32_t        last_prefetch_address;
 89	uint16_t        *mem_pointers[NUM_MEM_AREAS];
 90	code_ptr        resume_pc;
 91	code_ptr        reset_handler;
 92	m68k_options    *options;
 93	void            *system;
 94	m68k_breakpoint *breakpoints;
 95	uint32_t        num_breakpoints;
 96	uint32_t        bp_storage;
 97	uint8_t         int_pending;
 98	uint8_t         trace_pending;
 99	uint8_t         should_return;
100	uint8_t         ram_code_flags[];
101};
102
103typedef m68k_context *(*m68k_reset_handler)(m68k_context *context);
104
105
106void translate_m68k_stream(uint32_t address, m68k_context * context);
107void start_68k_context(m68k_context * context, uint32_t address);
108void resume_68k(m68k_context *context);
109void init_m68k_opts(m68k_options * opts, memmap_chunk * memmap, uint32_t num_chunks, uint32_t clock_divider);
110m68k_context * init_68k_context(m68k_options * opts, m68k_reset_handler reset_handler);
111void m68k_reset(m68k_context * context);
112void m68k_options_free(m68k_options *opts);
113void insert_breakpoint(m68k_context * context, uint32_t address, m68k_debug_handler bp_handler);
114void remove_breakpoint(m68k_context * context, uint32_t address);
115m68k_context * m68k_handle_code_write(uint32_t address, m68k_context * context);
116uint32_t get_instruction_start(m68k_options *opts, uint32_t address);
117uint16_t m68k_get_ir(m68k_context *context);
118void m68k_print_regs(m68k_context * context);
119void m68k_invalidate_code_range(m68k_context *context, uint32_t start, uint32_t end);
120void m68k_serialize(m68k_context *context, uint32_t pc, serialize_buffer *buf);
121void m68k_deserialize(deserialize_buffer *buf, void *vcontext);
122
123#endif //M68K_CORE_H_
124