| 1 |
/* |
| 2 |
* UAE - The Un*x Amiga Emulator |
| 3 |
* |
| 4 |
* memory management |
| 5 |
* |
| 6 |
* Copyright 1995 Bernd Schmidt |
| 7 |
*/ |
| 8 |
|
| 9 |
#ifndef UAE_MEMORY_H |
| 10 |
#define UAE_MEMORY_H |
| 11 |
|
| 12 |
#if !DIRECT_ADDRESSING && !REAL_ADDRESSING |
| 13 |
|
| 14 |
/* Enabling this adds one additional native memory reference per 68k memory |
| 15 |
* access, but saves one shift (on the x86). Enabling this is probably |
| 16 |
* better for the cache. My favourite benchmark (PP2) doesn't show a |
| 17 |
* difference, so I leave this enabled. */ |
| 18 |
|
| 19 |
#if 1 || defined SAVE_MEMORY |
| 20 |
#define SAVE_MEMORY_BANKS |
| 21 |
#endif |
| 22 |
|
| 23 |
typedef uae_u32 (REGPARAM2 *mem_get_func)(uaecptr) REGPARAM; |
| 24 |
typedef void (REGPARAM2 *mem_put_func)(uaecptr, uae_u32) REGPARAM; |
| 25 |
typedef uae_u8 *(REGPARAM2 *xlate_func)(uaecptr) REGPARAM; |
| 26 |
typedef int (REGPARAM2 *check_func)(uaecptr, uae_u32) REGPARAM; |
| 27 |
|
| 28 |
#undef DIRECT_MEMFUNCS_SUCCESSFUL |
| 29 |
|
| 30 |
#ifndef CAN_MAP_MEMORY |
| 31 |
#undef USE_COMPILER |
| 32 |
#endif |
| 33 |
|
| 34 |
#if defined(USE_COMPILER) && !defined(USE_MAPPED_MEMORY) |
| 35 |
#define USE_MAPPED_MEMORY |
| 36 |
#endif |
| 37 |
|
| 38 |
typedef struct { |
| 39 |
/* These ones should be self-explanatory... */ |
| 40 |
mem_get_func lget, wget, bget; |
| 41 |
mem_put_func lput, wput, bput; |
| 42 |
/* Use xlateaddr to translate an Amiga address to a uae_u8 * that can |
| 43 |
* be used to address memory without calling the wget/wput functions. |
| 44 |
* This doesn't work for all memory banks, so this function may call |
| 45 |
* abort(). */ |
| 46 |
xlate_func xlateaddr; |
| 47 |
/* To prevent calls to abort(), use check before calling xlateaddr. |
| 48 |
* It checks not only that the memory bank can do xlateaddr, but also |
| 49 |
* that the pointer points to an area of at least the specified size. |
| 50 |
* This is used for example to translate bitplane pointers in custom.c */ |
| 51 |
check_func check; |
| 52 |
} addrbank; |
| 53 |
|
| 54 |
extern uae_u8 filesysory[65536]; |
| 55 |
|
| 56 |
extern addrbank ram_bank; // Mac RAM |
| 57 |
extern addrbank rom_bank; // Mac ROM |
| 58 |
extern addrbank frame_bank; // Frame buffer |
| 59 |
|
| 60 |
/* Default memory access functions */ |
| 61 |
|
| 62 |
extern int REGPARAM2 default_check(uaecptr addr, uae_u32 size) REGPARAM; |
| 63 |
extern uae_u8 *REGPARAM2 default_xlate(uaecptr addr) REGPARAM; |
| 64 |
|
| 65 |
#define bankindex(addr) (((uaecptr)(addr)) >> 16) |
| 66 |
|
| 67 |
#ifdef SAVE_MEMORY_BANKS |
| 68 |
extern addrbank *mem_banks[65536]; |
| 69 |
#define get_mem_bank(addr) (*mem_banks[bankindex(addr)]) |
| 70 |
#define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = (b)) |
| 71 |
#else |
| 72 |
extern addrbank mem_banks[65536]; |
| 73 |
#define get_mem_bank(addr) (mem_banks[bankindex(addr)]) |
| 74 |
#define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = *(b)) |
| 75 |
#endif |
| 76 |
|
| 77 |
extern void memory_init(void); |
| 78 |
extern void map_banks(addrbank *bank, int first, int count); |
| 79 |
|
| 80 |
#ifndef NO_INLINE_MEMORY_ACCESS |
| 81 |
|
| 82 |
#define longget(addr) (call_mem_get_func(get_mem_bank(addr).lget, addr)) |
| 83 |
#define wordget(addr) (call_mem_get_func(get_mem_bank(addr).wget, addr)) |
| 84 |
#define byteget(addr) (call_mem_get_func(get_mem_bank(addr).bget, addr)) |
| 85 |
#define longput(addr,l) (call_mem_put_func(get_mem_bank(addr).lput, addr, l)) |
| 86 |
#define wordput(addr,w) (call_mem_put_func(get_mem_bank(addr).wput, addr, w)) |
| 87 |
#define byteput(addr,b) (call_mem_put_func(get_mem_bank(addr).bput, addr, b)) |
| 88 |
|
| 89 |
#else |
| 90 |
|
| 91 |
extern uae_u32 alongget(uaecptr addr); |
| 92 |
extern uae_u32 awordget(uaecptr addr); |
| 93 |
extern uae_u32 longget(uaecptr addr); |
| 94 |
extern uae_u32 wordget(uaecptr addr); |
| 95 |
extern uae_u32 byteget(uaecptr addr); |
| 96 |
extern void longput(uaecptr addr, uae_u32 l); |
| 97 |
extern void wordput(uaecptr addr, uae_u32 w); |
| 98 |
extern void byteput(uaecptr addr, uae_u32 b); |
| 99 |
|
| 100 |
#endif |
| 101 |
|
| 102 |
#ifndef MD_HAVE_MEM_1_FUNCS |
| 103 |
|
| 104 |
#define longget_1 longget |
| 105 |
#define wordget_1 wordget |
| 106 |
#define byteget_1 byteget |
| 107 |
#define longput_1 longput |
| 108 |
#define wordput_1 wordput |
| 109 |
#define byteput_1 byteput |
| 110 |
|
| 111 |
#endif |
| 112 |
|
| 113 |
#endif /* !DIRECT_ADDRESSING && !REAL_ADDRESSING */ |
| 114 |
|
| 115 |
#if REAL_ADDRESSING |
| 116 |
const uintptr MEMBaseDiff = 0; |
| 117 |
#endif |
| 118 |
#if DIRECT_ADDRESSING |
| 119 |
extern uintptr MEMBaseDiff; |
| 120 |
#endif |
| 121 |
|
| 122 |
static __inline__ uae_u8 *do_get_real_address(uaecptr addr) |
| 123 |
{ |
| 124 |
return (uae_u8 *)MEMBaseDiff + addr; |
| 125 |
} |
| 126 |
static __inline__ uae_u32 do_get_virtual_address(uae_u8 *addr) |
| 127 |
{ |
| 128 |
return (uintptr)addr - MEMBaseDiff; |
| 129 |
} |
| 130 |
|
| 131 |
#if REAL_ADDRESSING || DIRECT_ADDRESSING |
| 132 |
static __inline__ uae_u32 get_long(uaecptr addr) |
| 133 |
{ |
| 134 |
uae_u32 * const m = (uae_u32 *)do_get_real_address(addr); |
| 135 |
return do_get_mem_long(m); |
| 136 |
} |
| 137 |
static __inline__ uae_u32 get_word(uaecptr addr) |
| 138 |
{ |
| 139 |
uae_u16 * const m = (uae_u16 *)do_get_real_address(addr); |
| 140 |
return do_get_mem_word(m); |
| 141 |
} |
| 142 |
static __inline__ uae_u32 get_byte(uaecptr addr) |
| 143 |
{ |
| 144 |
uae_u8 * const m = (uae_u8 *)do_get_real_address(addr); |
| 145 |
return do_get_mem_byte(m); |
| 146 |
} |
| 147 |
static __inline__ void put_long(uaecptr addr, uae_u32 l) |
| 148 |
{ |
| 149 |
uae_u32 * const m = (uae_u32 *)do_get_real_address(addr); |
| 150 |
do_put_mem_long(m, l); |
| 151 |
} |
| 152 |
static __inline__ void put_word(uaecptr addr, uae_u32 w) |
| 153 |
{ |
| 154 |
uae_u16 * const m = (uae_u16 *)do_get_real_address(addr); |
| 155 |
do_put_mem_word(m, w); |
| 156 |
} |
| 157 |
static __inline__ void put_byte(uaecptr addr, uae_u32 b) |
| 158 |
{ |
| 159 |
uae_u8 * const m = (uae_u8 *)do_get_real_address(addr); |
| 160 |
do_put_mem_byte(m, b); |
| 161 |
} |
| 162 |
static __inline__ uae_u8 *get_real_address(uaecptr addr) |
| 163 |
{ |
| 164 |
return do_get_real_address(addr); |
| 165 |
} |
| 166 |
static __inline__ uae_u32 get_virtual_address(uae_u8 *addr) |
| 167 |
{ |
| 168 |
return do_get_virtual_address(addr); |
| 169 |
} |
| 170 |
static __inline__ int valid_address(uaecptr addr, uae_u32 size) |
| 171 |
{ |
| 172 |
return 1; |
| 173 |
} |
| 174 |
#else |
| 175 |
static __inline__ uae_u32 get_long(uaecptr addr) |
| 176 |
{ |
| 177 |
return longget_1(addr); |
| 178 |
} |
| 179 |
static __inline__ uae_u32 get_word(uaecptr addr) |
| 180 |
{ |
| 181 |
return wordget_1(addr); |
| 182 |
} |
| 183 |
static __inline__ uae_u32 get_byte(uaecptr addr) |
| 184 |
{ |
| 185 |
return byteget_1(addr); |
| 186 |
} |
| 187 |
static __inline__ void put_long(uaecptr addr, uae_u32 l) |
| 188 |
{ |
| 189 |
longput_1(addr, l); |
| 190 |
} |
| 191 |
static __inline__ void put_word(uaecptr addr, uae_u32 w) |
| 192 |
{ |
| 193 |
wordput_1(addr, w); |
| 194 |
} |
| 195 |
static __inline__ void put_byte(uaecptr addr, uae_u32 b) |
| 196 |
{ |
| 197 |
byteput_1(addr, b); |
| 198 |
} |
| 199 |
static __inline__ uae_u8 *get_real_address(uaecptr addr) |
| 200 |
{ |
| 201 |
return get_mem_bank(addr).xlateaddr(addr); |
| 202 |
} |
| 203 |
/* gb-- deliberately not implemented since it shall not be used... */ |
| 204 |
extern uae_u32 get_virtual_address(uae_u8 *addr); |
| 205 |
static __inline__ int valid_address(uaecptr addr, uae_u32 size) |
| 206 |
{ |
| 207 |
return get_mem_bank(addr).check(addr, size); |
| 208 |
} |
| 209 |
#endif /* DIRECT_ADDRESSING || REAL_ADDRESSING */ |
| 210 |
|
| 211 |
#endif /* MEMORY_H */ |
| 212 |
|
