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Use a typedef code_ptr in place of uint8_t * in 68K core to better support host instruction sets with different instruction word sizes. Make x86_68k_options contain a cpu_options so that gen_mem_fun can eventually be shared with the Z80 core.
author Mike Pavone <pavone@retrodev.com>
date Mon, 24 Feb 2014 01:30:16 -0800
parents acec5464fa1e
children c8fefa140c80
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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 BACKEND_H_
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7 #define BACKEND_H_
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9 #include <stdint.h>
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10 #include <stdio.h>
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11
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12 #define INVALID_OFFSET 0xFFFFFFFF
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13 #define EXTENSION_WORD 0xFFFFFFFE
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14
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15 typedef struct {
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16 int32_t disp;
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17 uint8_t mode;
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18 uint8_t base;
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19 uint8_t index;
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20 uint8_t cycles;
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21 } x86_ea;
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22
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23 #if defined(X86_64) || defined(X86_32)
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24 typedef uint8_t* code_ptr;
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25 #else
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26 typedef uint32_t* code_ptr;
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27 #endif
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29 typedef struct {
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30 uint8_t *base;
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31 int32_t *offsets;
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32 } native_map_slot;
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33
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34 typedef struct deferred_addr {
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35 struct deferred_addr *next;
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36 code_ptr dest;
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37 uint32_t address;
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38 } deferred_addr;
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40 typedef enum {
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41 READ_16,
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42 READ_8,
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43 WRITE_16,
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44 WRITE_8
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45 } ftype;
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47 typedef struct {
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48 uint32_t flags;
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49 native_map_slot *native_code_map;
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50 deferred_addr *deferred;
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51 code_ptr cur_code;
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52 code_ptr code_end;
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53 uint8_t **ram_inst_sizes;
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54 code_ptr save_context;
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55 code_ptr load_context;
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56 code_ptr handle_cycle_limit;
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57 code_ptr handle_cycle_limit_int;
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58 uint8_t context_reg;
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59 uint8_t scratch1;
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60 uint8_t scratch2;
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61 } cpu_options;
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64 #define MMAP_READ 0x01
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65 #define MMAP_WRITE 0x02
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66 #define MMAP_CODE 0x04
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67 #define MMAP_PTR_IDX 0x08
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68 #define MMAP_ONLY_ODD 0x10
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69 #define MMAP_ONLY_EVEN 0x20
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70 #define MMAP_FUNC_NULL 0x40
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72 typedef uint16_t (*read_16_fun)(uint32_t address, void * context);
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73 typedef uint8_t (*read_8_fun)(uint32_t address, void * context);
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74 typedef void * (*write_16_fun)(uint32_t address, void * context, uint16_t value);
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75 typedef void * (*write_8_fun)(uint32_t address, void * context, uint8_t value);
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77 typedef struct {
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78 uint32_t start;
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79 uint32_t end;
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80 uint32_t mask;
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81 uint16_t ptr_index;
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82 uint16_t flags;
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83 void * buffer;
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84 read_16_fun read_16;
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85 write_16_fun write_16;
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86 read_8_fun read_8;
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87 write_8_fun write_8;
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88 } memmap_chunk;
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89
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90 typedef uint8_t * (*native_addr_func)(void * context, uint32_t address);
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91
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92 deferred_addr * defer_address(deferred_addr * old_head, uint32_t address, uint8_t *dest);
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93 void remove_deferred_until(deferred_addr **head_ptr, deferred_addr * remove_to);
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94 void process_deferred(deferred_addr ** head_ptr, void * context, native_addr_func get_native);
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96 #endif //BACKEND_H_
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