annotate m68k_core.h @ 1908:c3d49c338224

Fix stateview target
author Michael Pavone <pavone@retrodev.com>
date Thu, 26 Mar 2020 23:53:35 -0700
parents 4e5797b3935a
children 2455662378ed 8b2ef428d1aa
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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 "serialize.h"
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12 //#include "68kinst.h"
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13 struct m68kinst;
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15 #define NUM_MEM_AREAS 8
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16 #define NATIVE_MAP_CHUNKS (64*1024)
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17 #define NATIVE_CHUNK_SIZE ((16 * 1024 * 1024 / NATIVE_MAP_CHUNKS))
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18 #define MAX_NATIVE_SIZE 255
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19
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20 #define M68K_OPT_BROKEN_READ_MODIFY 1
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21
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22 #define INT_PENDING_SR_CHANGE 254
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23 #define INT_PENDING_NONE 255
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24
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25 #define M68K_STATUS_TRACE 0x80
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26
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27 typedef void (*start_fun)(uint8_t * addr, void * context);
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29 typedef struct {
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30 code_ptr impl;
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31 uint16_t reglist;
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32 uint8_t reg_to_mem;
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33 uint8_t size;
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34 int8_t dir;
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35 } movem_fun;
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36
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37 typedef struct {
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38 cpu_options gen;
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39
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40 int8_t dregs[8];
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41 int8_t aregs[8];
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42 int8_t flag_regs[5];
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43 FILE *address_log;
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44 code_ptr read_16;
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45 code_ptr write_16;
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46 code_ptr read_8;
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47 code_ptr write_8;
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48 code_ptr read_32;
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49 code_ptr write_32_lowfirst;
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50 code_ptr write_32_highfirst;
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51 code_ptr do_sync;
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52 code_ptr handle_int_latch;
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53 code_ptr trap;
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54 start_fun start_context;
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55 code_ptr retrans_stub;
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56 code_ptr native_addr;
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57 code_ptr native_addr_and_sync;
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58 code_ptr get_sr;
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59 code_ptr set_sr;
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60 code_ptr set_ccr;
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61 code_ptr bp_stub;
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62 code_info extra_code;
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63 movem_fun *big_movem;
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64 uint32_t num_movem;
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65 uint32_t movem_storage;
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66 code_word prologue_start;
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67 } m68k_options;
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68
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69 typedef struct m68k_context m68k_context;
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70 typedef void (*m68k_debug_handler)(m68k_context *context, uint32_t pc);
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71
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72 typedef struct {
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73 m68k_debug_handler handler;
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74 uint32_t address;
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75 } m68k_breakpoint;
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76
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77 struct m68k_context {
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78 uint8_t flags[5];
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79 uint8_t status;
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80 uint16_t int_ack;
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81 uint32_t dregs[8];
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82 uint32_t aregs[9];
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83 uint32_t target_cycle; //cycle at which the next synchronization or interrupt occurs
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84 uint32_t current_cycle;
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85 uint32_t sync_cycle;
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86 uint32_t int_cycle;
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87 uint32_t int_num;
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88 uint32_t last_prefetch_address;
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89 uint16_t *mem_pointers[NUM_MEM_AREAS];
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90 code_ptr resume_pc;
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91 code_ptr reset_handler;
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92 m68k_options *options;
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93 void *system;
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94 m68k_breakpoint *breakpoints;
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95 uint32_t num_breakpoints;
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96 uint32_t bp_storage;
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97 uint8_t int_pending;
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98 uint8_t trace_pending;
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7022ba865cfd Initial work for allowing loading a ROM from menu
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99 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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100 uint8_t ram_code_flags[];
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101 };
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102
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103 typedef m68k_context *(*m68k_reset_handler)(m68k_context *context);
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104
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105
567
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
Michael Pavone <pavone@retrodev.com>
parents: 566
diff changeset
106 void translate_m68k_stream(uint32_t address, m68k_context * context);
18
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 14
diff changeset
107 void start_68k_context(m68k_context * context, uint32_t address);
883
9f149f0e98b7 It is now possible to switch back and forth between the menu ROM and the game
Michael Pavone <pavone@retrodev.com>
parents: 874
diff changeset
108 void resume_68k(m68k_context *context);
667
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
Michael Pavone <pavone@retrodev.com>
parents: 653
diff changeset
109 void init_m68k_opts(m68k_options * opts, memmap_chunk * memmap, uint32_t num_chunks, uint32_t clock_divider);
1082
2ec5e6eaf81d Add support for specifying a reset handler in the M68K core. Adjust memory map initialization to handle extra field. Improved handling of out of bounds execution.
Michael Pavone <pavone@retrodev.com>
parents: 996
diff changeset
110 m68k_context * init_68k_context(m68k_options * opts, m68k_reset_handler reset_handler);
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
111 void m68k_reset(m68k_context * context);
884
252dfd29831d Selecting a second game from the menu now works
Michael Pavone <pavone@retrodev.com>
parents: 883
diff changeset
112 void m68k_options_free(m68k_options *opts);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1102
diff changeset
113 void insert_breakpoint(m68k_context * context, uint32_t address, m68k_debug_handler bp_handler);
184
ebcbdd1c4cc8 Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents: 155
diff changeset
114 void remove_breakpoint(m68k_context * context, uint32_t address);
208
3457dc6fd558 Tweaks to make blastem compatible with m68k-tester
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
115 m68k_context * m68k_handle_code_write(uint32_t address, m68k_context * context);
1130
8f14767661fa Remove memory map assumptions from Z80 core and move a little bit of logic to the generic backend.c so it can be shared between CPU cores
Michael Pavone <pavone@retrodev.com>
parents: 1111
diff changeset
116 uint32_t get_instruction_start(m68k_options *opts, uint32_t address);
989
d70000fdff0b Implemented IR and undefined bits of info word for address error exception frames
Michael Pavone <pavone@retrodev.com>
parents: 987
diff changeset
117 uint16_t m68k_get_ir(m68k_context *context);
1082
2ec5e6eaf81d Add support for specifying a reset handler in the M68K core. Adjust memory map initialization to handle extra field. Improved handling of out of bounds execution.
Michael Pavone <pavone@retrodev.com>
parents: 996
diff changeset
118 void m68k_print_regs(m68k_context * context);
1228
2e6dcb5c11a2 WIP support for XBAND mapper hardware
Michael Pavone <pavone@retrodev.com>
parents: 1130
diff changeset
119 void m68k_invalidate_code_range(m68k_context *context, uint32_t start, uint32_t end);
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1363
diff changeset
120 void m68k_serialize(m68k_context *context, uint32_t pc, serialize_buffer *buf);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1363
diff changeset
121 void m68k_deserialize(deserialize_buffer *buf, void *vcontext);
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
122
569
9b7fcf748be0 Rename x86_68k_options and m68k_to_x86.h to m68k_options and m68k_core.h respectively
Michael Pavone <pavone@retrodev.com>
parents: 567
diff changeset
123 #endif //M68K_CORE_H_
198
209a37eed3e7 Add support for breaking into the debugger while game is running
Mike Pavone <pavone@retrodev.com>
parents: 197
diff changeset
124