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annotate m68k_core.h @ 1908:c3d49c338224

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Fix stateview target
author Michael Pavone <pavone@retrodev.com>
date Thu, 26 Mar 2020 23:53:35 -0700
parents 4e5797b3935a
children 2455662378ed 8b2ef428d1aa
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
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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.
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
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5 */
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9b7fcf748be0 Rename x86_68k_options and m68k_to_x86.h to m68k_options and m68k_core.h respectively
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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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acec5464fa1e Rename x86_backend.h and x86_backend.c to backend.h and backend.c respectively
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10 #include "backend.h"
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4e5797b3935a WIP - New savestate format
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11 #include "serialize.h"
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3457dc6fd558 Tweaks to make blastem compatible with m68k-tester
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12 //#include "68kinst.h"
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13 struct m68kinst;
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14
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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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15 #define NUM_MEM_AREAS 8
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3d3966c254b2 RTE doesn't crash the emulator anymore
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16 #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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17 #define NATIVE_CHUNK_SIZE ((16 * 1024 * 1024 / NATIVE_MAP_CHUNKS))
193
c66e4636f991 Implement support for self-modifying code
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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
208803173ebc Implemented M68K trace mode. Some edge cases/SR update paths still need work
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26
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27 typedef void (*start_fun)(uint8_t * addr, void * context);
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28
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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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e5e8b48ad157 Initial stab at horizontal interrupts and improving accuracy of vertical interrupts. Also added the VINT pending flag to status port.
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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;
82
6331ddec228f Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
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86 uint32_t int_cycle;
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87 uint32_t int_num;
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902c53d9c16f Half assed, prefetch based open bus value emulation. Gets BlastEm up to 119/122 in VDP FIFO Testing
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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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9f149f0e98b7 It is now possible to switch back and forth between the menu ROM and the game
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90 code_ptr resume_pc;
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91 code_ptr reset_handler;
653
a18e3923481e Remove some of the hard coded assumptions about the memory map from the CPU cores
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92 m68k_options *options;
288
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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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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98d7b6073163 Implement interrupt latency. Fixes Sesame Street: Counting Cafe and gives accurate results in my test ROM
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parents: 837
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97 uint8_t int_pending;
1303
208803173ebc Implemented M68K trace mode. Some edge cases/SR update paths still need work
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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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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