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annotate m68k_core.h @ 1116:fe8c79f82c22

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More cleanup in preparation for SMS/Mark III support
author Michael Pavone <pavone@retrodev.com>
date Thu, 22 Dec 2016 10:51:33 -0800
parents 2eb54e24914e
children 8f14767661fa
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140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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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.
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5 */
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6 #ifndef M68K_CORE_H_
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7 #define M68K_CORE_H_
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8 #include <stdint.h>
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9 #include <stdio.h>
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10 #include "backend.h"
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11 //#include "68kinst.h"
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12 struct m68kinst;
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13
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cbf97d335444 Full support for Sega mapper when it comes to data. Code in remapped sections may not work reliably. SSF2 now works.
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14 #define NUM_MEM_AREAS 8
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3d3966c254b2 RTE doesn't crash the emulator anymore
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15 #define NATIVE_MAP_CHUNKS (64*1024)
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1f09994e92c5 Initial stab at implementing address error exceptions. Need to fill in the value of IR, undefined bits of last stack frame word and properly deal with address errors that occur during exception processing.
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16 #define NATIVE_CHUNK_SIZE ((16 * 1024 * 1024 / NATIVE_MAP_CHUNKS))
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c66e4636f991 Implement support for self-modifying code
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17 #define MAX_NATIVE_SIZE 255
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18
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19 #define M68K_OPT_BROKEN_READ_MODIFY 1
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20
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21 #define INT_PENDING_SR_CHANGE 254
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22 #define INT_PENDING_NONE 255
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784bc1e45e80 Fix 68K interrupt handling some more. Fatal Rewind is working again.
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23
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24 typedef void (*start_fun)(uint8_t * addr, void * context);
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25
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26 typedef struct {
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27 cpu_options gen;
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28
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29 int8_t dregs[8];
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30 int8_t aregs[8];
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31 int8_t flag_regs[5];
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32 FILE *address_log;
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33 code_ptr read_16;
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34 code_ptr write_16;
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35 code_ptr read_8;
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36 code_ptr write_8;
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37 code_ptr read_32;
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38 code_ptr write_32_lowfirst;
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39 code_ptr write_32_highfirst;
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40 code_ptr do_sync;
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41 code_ptr trap;
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42 start_fun start_context;
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43 code_ptr retrans_stub;
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44 code_ptr native_addr;
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45 code_ptr native_addr_and_sync;
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46 code_ptr get_sr;
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47 code_ptr set_sr;
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48 code_ptr set_ccr;
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49 } m68k_options;
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50
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51 typedef struct m68k_context {
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52 uint8_t flags[5];
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53 uint8_t status;
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54 uint16_t int_ack;
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55 uint32_t dregs[8];
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56 uint32_t aregs[9];
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57 uint32_t target_cycle; //cycle at which the next synchronization or interrupt occurs
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58 uint32_t current_cycle;
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59 uint32_t sync_cycle;
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60 uint32_t int_cycle;
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61 uint32_t int_num;
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62 uint32_t last_prefetch_address;
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63 uint16_t *mem_pointers[NUM_MEM_AREAS];
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64 code_ptr resume_pc;
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65 code_ptr reset_handler;
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66 native_map_slot *native_code_map;
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a18e3923481e Remove some of the hard coded assumptions about the memory map from the CPU cores
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67 m68k_options *options;
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a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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68 void *system;
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98d7b6073163 Implement interrupt latency. Fixes Sesame Street: Counting Cafe and gives accurate results in my test ROM
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69 uint8_t int_pending;
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7022ba865cfd Initial work for allowing loading a ROM from menu
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70 uint8_t should_return;
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fc04781f4d28 Removed hardcoded assumptions in M68K core about which parts of the memory map are RAM
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71 uint8_t ram_code_flags[];
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72 } m68k_context;
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74 typedef m68k_context *(*m68k_reset_handler)(m68k_context *context);
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75 typedef m68k_context *(*m68k_debug_handler)(m68k_context *context, uint32_t pc);
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76
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8e395210f50f Refactor gen_x86 to use an interface more like gen_arm and to remove the need for the caller to decide whether an 8-bit or 32-bit displacement is needed in the rdisp functions. Update m68k_to_x86 to use the new version of the gen_x86 functions and do some minor refactoring there in the process
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77 void translate_m68k_stream(uint32_t address, m68k_context * context);
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78 void start_68k_context(m68k_context * context, uint32_t address);
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79 void resume_68k(m68k_context *context);
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30ccf56842d6 All cycle counters are now based off the master clock. This seems to have messed up Z80 interrupt timing (music in Sonic 2 is too slow for instance), but things are generally working
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80 void init_m68k_opts(m68k_options * opts, memmap_chunk * memmap, uint32_t num_chunks, uint32_t clock_divider);
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81 m68k_context * init_68k_context(m68k_options * opts, m68k_reset_handler reset_handler);
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82 void m68k_reset(m68k_context * context);
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252dfd29831d Selecting a second game from the menu now works
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83 void m68k_options_free(m68k_options *opts);
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84 void insert_breakpoint(m68k_context * context, uint32_t address, m68k_debug_handler bp_handler);
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ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
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85 void remove_breakpoint(m68k_context * context, uint32_t address);
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86 m68k_context * m68k_handle_code_write(uint32_t address, m68k_context * context);
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751280fb4494 Fix interrupt latency from STOP instruction status reg changes. Fix modified code patching when non-standard aliases are used. This fixes the demo MDEM's First
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87 uint32_t get_instruction_start(m68k_options *opts, native_map_slot * native_code_map, uint32_t address);
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d70000fdff0b Implemented IR and undefined bits of info word for address error exception frames
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88 uint16_t m68k_get_ir(m68k_context *context);
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89 void m68k_print_regs(m68k_context * context);
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91 #endif //M68K_CORE_H_
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92