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comparison backend.h @ 557:acec5464fa1e

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Rename x86_backend.h and x86_backend.c to backend.h and backend.c respectively
author Mike Pavone <pavone@retrodev.com>
date Mon, 24 Feb 2014 00:50:15 -0800
parents x86_backend.h@34dfa9b24c7b
children dc9f178085a0
comparison
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556:34dfa9b24c7b 557:acec5464fa1e
1 /*
2 Copyright 2013 Michael Pavone
3 This file is part of BlastEm.
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.
5 */
6 #ifndef BACKEND_H_
7 #define BACKEND_H_
8
9 #include <stdint.h>
10 #include <stdio.h>
11
12 #define INVALID_OFFSET 0xFFFFFFFF
13 #define EXTENSION_WORD 0xFFFFFFFE
14
15 typedef struct {
16 int32_t disp;
17 uint8_t mode;
18 uint8_t base;
19 uint8_t index;
20 uint8_t cycles;
21 } x86_ea;
22
23 typedef struct {
24 uint8_t *base;
25 int32_t *offsets;
26 } native_map_slot;
27
28 typedef struct deferred_addr {
29 struct deferred_addr *next;
30 uint8_t *dest;
31 uint32_t address;
32 } deferred_addr;
33
34 typedef enum {
35 READ_16,
36 READ_8,
37 WRITE_16,
38 WRITE_8
39 } ftype;
40
41 typedef struct {
42 uint32_t flags;
43 native_map_slot *native_code_map;
44 deferred_addr *deferred;
45 uint8_t *cur_code;
46 uint8_t *code_end;
47 uint8_t **ram_inst_sizes;
48 FILE *address_log;
49 uint8_t *save_context;
50 uint8_t *load_context;
51 uint8_t *handle_cycle_limit;
52 uint8_t *handle_cycle_limit_int;
53 uint8_t context_reg;
54 uint8_t scratch1;
55 uint8_t scratch2;
56 } cpu_options;
57
58
59 #define MMAP_READ 0x01
60 #define MMAP_WRITE 0x02
61 #define MMAP_CODE 0x04
62 #define MMAP_PTR_IDX 0x08
63 #define MMAP_ONLY_ODD 0x10
64 #define MMAP_ONLY_EVEN 0x20
65 #define MMAP_FUNC_NULL 0x40
66
67 typedef uint16_t (*read_16_fun)(uint32_t address, void * context);
68 typedef uint8_t (*read_8_fun)(uint32_t address, void * context);
69 typedef void * (*write_16_fun)(uint32_t address, void * context, uint16_t value);
70 typedef void * (*write_8_fun)(uint32_t address, void * context, uint8_t value);
71
72 typedef struct {
73 uint32_t start;
74 uint32_t end;
75 uint32_t mask;
76 uint16_t ptr_index;
77 uint16_t flags;
78 void * buffer;
79 read_16_fun read_16;
80 write_16_fun write_16;
81 read_8_fun read_8;
82 write_8_fun write_8;
83 } memmap_chunk;
84
85 typedef uint8_t * (*native_addr_func)(void * context, uint32_t address);
86
87 deferred_addr * defer_address(deferred_addr * old_head, uint32_t address, uint8_t *dest);
88 void remove_deferred_until(deferred_addr **head_ptr, deferred_addr * remove_to);
89 void process_deferred(deferred_addr ** head_ptr, void * context, native_addr_func get_native);
90
91 #endif //BACKEND_H_
92