Mercurial > repos > blastem
view m68k_core.h @ 2069:8e51c0c3f2e3 segacd
Initial attempt at implementing the Sega CD graphics hardware
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 30 Jan 2022 19:55:33 -0800 |
parents | 8ee7ecbf3f21 |
children | 8554751f17b5 |
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/* Copyright 2013 Michael Pavone This file is part of BlastEm. BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. */ #ifndef M68K_CORE_H_ #define M68K_CORE_H_ #include <stdint.h> #include <stdio.h> #include "backend.h" #include "serialize.h" //#include "68kinst.h" struct m68kinst; #define NUM_MEM_AREAS 10 #define NATIVE_MAP_CHUNKS (64*1024) #define NATIVE_CHUNK_SIZE ((16 * 1024 * 1024 / NATIVE_MAP_CHUNKS)) #define MAX_NATIVE_SIZE 255 #define M68K_OPT_BROKEN_READ_MODIFY 1 #define INT_PENDING_SR_CHANGE 254 #define INT_PENDING_NONE 255 #define M68K_STATUS_TRACE 0x80 typedef void (*start_fun)(uint8_t * addr, void * context); typedef struct m68k_context m68k_context; typedef m68k_context *(*sync_fun)(m68k_context * context, uint32_t address); typedef struct { code_ptr impl; uint16_t reglist; uint8_t reg_to_mem; uint8_t size; int8_t dir; } movem_fun; typedef struct { cpu_options gen; int8_t dregs[8]; int8_t aregs[8]; int8_t flag_regs[5]; FILE *address_log; code_ptr read_16; code_ptr write_16; code_ptr read_8; code_ptr write_8; code_ptr read_32; code_ptr write_32_lowfirst; code_ptr write_32_highfirst; code_ptr do_sync; code_ptr handle_int_latch; code_ptr trap; start_fun start_context; code_ptr retrans_stub; code_ptr native_addr; code_ptr native_addr_and_sync; code_ptr get_sr; code_ptr set_sr; code_ptr set_ccr; code_ptr bp_stub; sync_fun sync_components; code_info extra_code; movem_fun *big_movem; uint32_t num_movem; uint32_t movem_storage; code_word prologue_start; } m68k_options; typedef void (*m68k_debug_handler)(m68k_context *context, uint32_t pc); typedef struct { m68k_debug_handler handler; uint32_t address; } m68k_breakpoint; struct m68k_context { uint8_t flags[5]; uint8_t status; uint16_t int_ack; 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; uint32_t last_prefetch_address; uint16_t *mem_pointers[NUM_MEM_AREAS]; code_ptr resume_pc; code_ptr reset_handler; m68k_options *options; void *system; m68k_breakpoint *breakpoints; uint32_t num_breakpoints; uint32_t bp_storage; uint8_t int_pending; uint8_t trace_pending; uint8_t should_return; uint8_t ram_code_flags[]; }; typedef m68k_context *(*m68k_reset_handler)(m68k_context *context); void translate_m68k_stream(uint32_t address, m68k_context * context); void start_68k_context(m68k_context * context, uint32_t address); void resume_68k(m68k_context *context); void init_m68k_opts(m68k_options * opts, memmap_chunk * memmap, uint32_t num_chunks, uint32_t clock_divider, sync_fun sync_components); m68k_context * init_68k_context(m68k_options * opts, m68k_reset_handler reset_handler); void m68k_reset(m68k_context * context); void m68k_options_free(m68k_options *opts); void insert_breakpoint(m68k_context * context, uint32_t address, m68k_debug_handler bp_handler); void remove_breakpoint(m68k_context * context, uint32_t address); m68k_context * m68k_handle_code_write(uint32_t address, m68k_context * context); uint32_t get_instruction_start(m68k_options *opts, uint32_t address); uint16_t m68k_get_ir(m68k_context *context); void m68k_print_regs(m68k_context * context); void m68k_invalidate_code_range(m68k_context *context, uint32_t start, uint32_t end); void m68k_serialize(m68k_context *context, uint32_t pc, serialize_buffer *buf); void m68k_deserialize(deserialize_buffer *buf, void *vcontext); #endif //M68K_CORE_H_