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annotate z80_to_x86.h @ 620:9d6fed6501ba

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Fix handling of code writes for Z80 core. This seems to get things close to being back to where they were before the big refactor that broke the Z80 core. Some problems remain. Notably the sound driver in Sonic 2 is still quite broken.
author Michael Pavone <pavone@retrodev.com>
date Mon, 29 Dec 2014 23:08:39 -0800
parents 086de8692932
children f822d9216968
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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 Z80_TO_X86_H_
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7 #define Z80_TO_X86_H_
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8 #include "z80inst.h"
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9 #include "backend.h"
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10
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11 #define ZNUM_MEM_AREAS 4
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12 #define ZMAX_NATIVE_SIZE 128
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13
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14 enum {
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15 ZF_C = 0,
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16 ZF_N,
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17 ZF_PV,
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18 ZF_H,
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19 ZF_Z,
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20 ZF_S,
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21 ZF_NUM
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22 };
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23
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24 typedef void (*z80_run_fun)(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 code_ptr save_context_scratch;
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29 code_ptr load_context_scratch;
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30 code_ptr native_addr;
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31 code_ptr retrans_stub;
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32 code_ptr do_sync;
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33 code_ptr read_8;
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34 code_ptr write_8;
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35 code_ptr read_8_noinc;
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36 code_ptr write_8_noinc;
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37 code_ptr read_16;
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38 code_ptr write_16_highfirst;
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39 code_ptr write_16_lowfirst;
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40 code_ptr read_io;
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41 code_ptr write_io;
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42
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43 uint32_t flags;
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44 int8_t regs[Z80_UNUSED];
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45 int8_t bank_reg;
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46 int8_t bank_pointer;
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47 z80_run_fun run;
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48 } z80_options;
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49
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50 typedef struct {
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51 void * native_pc;
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52 uint16_t sp;
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53 uint8_t flags[ZF_NUM];
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54 uint16_t bank_reg;
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55 uint8_t regs[Z80_A+1];
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56 uint8_t im;
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57 uint8_t alt_regs[Z80_A+1];
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58 uint32_t target_cycle;
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59 uint32_t current_cycle;
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60 uint8_t alt_flags[ZF_NUM];
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61 uint8_t * mem_pointers[ZNUM_MEM_AREAS];
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62 uint8_t iff1;
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63 uint8_t iff2;
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64 uint16_t scratch1;
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65 uint16_t scratch2;
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66 void * extra_pc;
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67 uint32_t sync_cycle;
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68 uint32_t int_cycle;
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69 native_map_slot * static_code_map;
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70 native_map_slot * banked_code_map;
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71 z80_options * options;
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72 void * system;
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73 uint8_t ram_code_flags[(8 * 1024)/128/8];
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74 uint32_t int_enable_cycle;
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75 z80_run_fun run;
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76 uint16_t pc;
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77 } z80_context;
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78
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79 void translate_z80_stream(z80_context * context, uint32_t address);
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80 void init_x86_z80_opts(z80_options * options, memmap_chunk const * chunks, uint32_t num_chunks);
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81 void init_z80_context(z80_context * context, z80_options * options);
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82 code_ptr z80_get_native_address(z80_context * context, uint32_t address);
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83 code_ptr z80_get_native_address_trans(z80_context * context, uint32_t address);
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84 z80_context * z80_handle_code_write(uint32_t address, z80_context * context);
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85 void z80_run(z80_context * context);
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86 void z80_reset(z80_context * context);
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87 void zinsert_breakpoint(z80_context * context, uint16_t address, uint8_t * bp_handler);
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88 void zremove_breakpoint(z80_context * context, uint16_t address);
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89 void * z80_gen_bank_write(uint32_t start_address, void * voptions);
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91 #endif //Z80_TO_X86_H_
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92