1 // memory map related stuff
3 typedef unsigned char u8;
4 typedef unsigned short u16;
5 typedef unsigned int u32;
6 typedef unsigned long uptr; // unsigned pointer-sized int
8 #define M68K_MEM_SHIFT 16
9 // minimum size we can map
10 #define M68K_BANK_SIZE (1 << M68K_MEM_SHIFT)
11 #define M68K_BANK_MASK (M68K_BANK_SIZE - 1)
13 extern uptr m68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
14 extern uptr m68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
15 extern uptr m68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
16 extern uptr m68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
18 extern uptr s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
19 extern uptr s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
20 extern uptr s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
21 extern uptr s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
23 // top-level handlers that cores can use
24 // (or alternatively build them into themselves)
25 // XXX: unhandled: *16 and *32 might cross the bank boundaries
26 typedef u32 (cpu68k_read_f)(u32 a);
27 typedef void (cpu68k_write_f)(u32 a, u32 d);
29 extern u32 m68k_read8(u32 a);
30 extern u32 m68k_read16(u32 a);
31 extern void m68k_write8(u32 a, u8 d);
32 extern void m68k_write16(u32 a, u16 d);
35 #define Z80_MEM_SHIFT 13
36 extern uptr z80_read_map [0x10000 >> Z80_MEM_SHIFT];
37 extern uptr z80_write_map[0x10000 >> Z80_MEM_SHIFT];
38 typedef unsigned char (z80_read_f)(unsigned short a);
39 typedef void (z80_write_f)(unsigned int a, unsigned char data);
41 void z80_map_set(uptr *map, int start_addr, int end_addr,
42 const void *func_or_mh, int is_func);
43 void cpu68k_map_set(uptr *map, int start_addr, int end_addr,
44 const void *func_or_mh, int is_func);
45 void cpu68k_map_all_ram(int start_addr, int end_addr, void *ptr, int is_sub);
46 void m68k_map_unmap(int start_addr, int end_addr);
48 #define map_flag_set(x) ((x) & ((uptr)1 << (sizeof(uptr) * 8 - 1)))
50 #define MAKE_68K_READ8(name, map) \
55 v = map[a >> M68K_MEM_SHIFT]; \
56 if (map_flag_set(v)) \
57 return ((cpu68k_read_f *)(v << 1))(a); \
59 return *(u8 *)((v << 1) + (a ^ 1)); \
62 #define MAKE_68K_READ16(name, map) \
67 v = map[a >> M68K_MEM_SHIFT]; \
68 if (map_flag_set(v)) \
69 return ((cpu68k_read_f *)(v << 1))(a); \
71 return *(u16 *)((v << 1) + a); \
74 #define MAKE_68K_READ32(name, map) \
80 v = map[a >> M68K_MEM_SHIFT]; \
82 if (map_flag_set(v)) { \
83 d = ((cpu68k_read_f *)vs)(a) << 16; \
84 d |= ((cpu68k_read_f *)vs)(a + 2); \
87 u16 *m = (u16 *)(vs + a); \
88 d = (m[0] << 16) | m[1]; \
93 #define MAKE_68K_WRITE8(name, map) \
94 void name(u32 a, u8 d) \
98 v = map[a >> M68K_MEM_SHIFT]; \
99 if (map_flag_set(v)) \
100 ((cpu68k_write_f *)(v << 1))(a, d); \
102 *(u8 *)((v << 1) + (a ^ 1)) = d; \
105 #define MAKE_68K_WRITE16(name, map) \
106 void name(u32 a, u16 d) \
110 v = map[a >> M68K_MEM_SHIFT]; \
111 if (map_flag_set(v)) \
112 ((cpu68k_write_f *)(v << 1))(a, d); \
114 *(u16 *)((v << 1) + a) = d; \
117 #define MAKE_68K_WRITE32(name, map) \
118 void name(u32 a, u32 d) \
122 v = map[a >> M68K_MEM_SHIFT]; \
124 if (map_flag_set(v)) { \
125 ((cpu68k_write_f *)vs)(a, d >> 16); \
126 ((cpu68k_write_f *)vs)(a + 2, d); \
129 u16 *m = (u16 *)(vs + a); \
137 uptr addr; // stores (membase >> 1) or ((handler >> 1) | (1<<31))