lxdream 0.9.1| filename | src/mem.h |
| changeset | 934:3acd3b3ee6d1 |
| prev | 931:430048ea8b71 |
| next | 939:6f2302afeb89 |
| author | nkeynes |
| date | Fri Dec 26 14:25:23 2008 +0000 (15 years ago) |
| branch | lxdream-mem |
| permissions | -rw-r--r-- |
| last change | Change RAM regions to use static arrays rather than mmap regions, for a 2-3% performance gain. General mem cleanups, including some save state fixes that break states again. |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 *
4 * mem is responsible for creating and maintaining the overall system memory
5 * map, as visible from the SH4 processor. (Note the ARM has a different map)
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
20 #ifndef lxdream_mem_H
21 #define lxdream_mem_H 1
23 #include <stdint.h>
24 #include "lxdream.h"
25 #include "hook.h"
27 #ifdef __cplusplus
28 extern "C" {
29 #endif
31 /**
32 * Basic memory region vtable - read/write at byte, word, long, and burst
33 * (32-byte) sizes.
34 */
35 typedef struct mem_region_fn {
36 FASTCALL int32_t (*read_long)(sh4addr_t addr);
37 FASTCALL void (*write_long)(sh4addr_t addr, uint32_t val);
38 FASTCALL int32_t (*read_word)(sh4addr_t addr);
39 FASTCALL void (*write_word)(sh4addr_t addr, uint32_t val);
40 FASTCALL int32_t (*read_byte)(sh4addr_t addr);
41 FASTCALL void (*write_byte)(sh4addr_t addr, uint32_t val);
42 FASTCALL void (*read_burst)(unsigned char *dest, sh4addr_t addr);
43 FASTCALL void (*write_burst)(sh4addr_t addr, unsigned char *src);
44 } *mem_region_fn_t;
46 int32_t FASTCALL unmapped_read_long( sh4addr_t addr );
47 void FASTCALL unmapped_write_long( sh4addr_t addr, uint32_t val );
48 void FASTCALL unmapped_read_burst( unsigned char *dest, sh4addr_t addr );
49 void FASTCALL unmapped_write_burst( sh4addr_t addr, unsigned char *src );
50 extern struct mem_region_fn mem_region_unmapped;
52 typedef struct mem_region {
53 uint32_t base;
54 uint32_t size;
55 const char *name;
56 sh4ptr_t mem;
57 uint32_t flags;
58 mem_region_fn_t fn;
59 } *mem_region_t;
61 #define MAX_IO_REGIONS 24
62 #define MAX_MEM_REGIONS 16
64 #define MEM_REGION_BIOS "Bios ROM"
65 #define MEM_REGION_MAIN "System RAM"
66 #define MEM_REGION_VIDEO "Video RAM"
67 #define MEM_REGION_VIDEO64 "Video RAM 64-bit"
68 #define MEM_REGION_AUDIO "Audio RAM"
69 #define MEM_REGION_AUDIO_SCRATCH "Audio Scratch RAM"
70 #define MEM_REGION_FLASH "System Flash"
71 #define MEM_REGION_PVR2TA "PVR2 TA Command"
72 #define MEM_REGION_PVR2YUV "PVR2 YUV Decode"
73 #define MEM_REGION_PVR2VDMA1 "PVR2 VRAM DMA 1"
74 #define MEM_REGION_PVR2VDMA2 "PVR2 VRAM DMA 2"
76 typedef gboolean (*mem_page_remapped_hook_t)(sh4addr_t page, mem_region_fn_t newfn, void *user_data);
77 DECLARE_HOOK( mem_page_remapped_hook, mem_page_remapped_hook_t );
79 struct mem_region *mem_map_region( void *mem, uint32_t base, uint32_t size,
80 const char *name, mem_region_fn_t fn, int flags, uint32_t repeat_offset,
81 uint32_t repeat_until );
83 /**
84 * Load a ROM image from the specified filename. If the memory region has not
85 * been allocated, it is created now, otherwise the existing region is reused.
86 * If the CRC check fails, a warning will be printed.
87 * @return TRUE if the image was loaded successfully (irrespective of CRC failure).
88 */
89 gboolean mem_load_rom( void *output, const gchar *filename, uint32_t size, uint32_t crc );
90 void *mem_alloc_pages( int n );
91 sh4ptr_t mem_get_region( uint32_t addr );
92 sh4ptr_t mem_get_region_by_name( const char *name );
93 gboolean mem_has_page( uint32_t addr );
94 int mem_load_block( const gchar *filename, uint32_t base, uint32_t size );
95 int mem_save_block( const gchar *filename, uint32_t base, uint32_t size );
96 void mem_set_trace( const gchar *tracelist, int flag );
97 void mem_init( void );
98 void mem_reset( void );
99 void mem_copy_from_sh4( sh4ptr_t dest, sh4addr_t src, size_t count );
100 void mem_copy_to_sh4( sh4addr_t dest, sh4ptr_t src, size_t count );
102 /**
103 * Write a long value directly to SH4-addressable memory.
104 * @param dest a valid, writable physical memory address, relative to the SH4
105 * @param value the value to write.
106 */
107 void mem_write_long( sh4addr_t dest, uint32_t value );
109 #define ENABLE_DEBUG_MODE 1
111 typedef enum { BREAK_NONE=0, BREAK_ONESHOT=1, BREAK_KEEP=2 } breakpoint_type_t;
113 struct breakpoint_struct {
114 uint32_t address;
115 breakpoint_type_t type;
116 };
118 #define MAX_BREAKPOINTS 32
121 #define MEM_FLAG_ROM 4 /* Mem region is ROM-based */
122 #define MEM_FLAG_RAM 6
124 #define WATCH_WRITE 1
125 #define WATCH_READ 2
126 #define WATCH_EXEC 3 /* AKA Breakpoint :) */
128 typedef struct watch_point *watch_point_t;
130 watch_point_t mem_new_watch( uint32_t start, uint32_t end, int flags );
131 void mem_delete_watch( watch_point_t watch );
132 watch_point_t mem_is_watched( uint32_t addr, int size, int op );
134 extern mem_region_fn_t *ext_address_space;
136 #define SIGNEXT4(n) ((((int32_t)(n))<<28)>>28)
137 #define SIGNEXT8(n) ((int32_t)((int8_t)(n)))
138 #define SIGNEXT12(n) ((((int32_t)(n))<<20)>>20)
139 #define SIGNEXT16(n) ((int32_t)((int16_t)(n)))
140 #define SIGNEXT32(n) ((int64_t)((int32_t)(n)))
141 #define SIGNEXT48(n) ((((int64_t)(n))<<16)>>16)
142 #define ZEROEXT32(n) ((int64_t)((uint64_t)((uint32_t)(n))))
144 #ifdef __cplusplus
145 }
146 #endif
148 #endif /* !lxdream_mem_H */
.