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 void z80_map_set(uptr *map, int start_addr, int end_addr,
24 const void *func_or_mh, int is_func);
25 void cpu68k_map_set(uptr *map, int start_addr, int end_addr,
26 const void *func_or_mh, int is_func);
27 void cpu68k_map_all_ram(int start_addr, int end_addr, void *ptr, int is_sub);
28 void m68k_map_unmap(int start_addr, int end_addr);
30 // top-level handlers that cores can use
31 // (or alternatively build them into themselves)
32 // XXX: unhandled: *16 and *32 might cross the bank boundaries
33 typedef u32 (cpu68k_read_f)(u32 a);
34 typedef void (cpu68k_write_f)(u32 a, u32 d);
36 #define MAKE_68K_READ8(name, map) \
41 v = map[a >> M68K_MEM_SHIFT]; \
43 return ((cpu68k_read_f *)(v << 1))(a); \
45 return *(u8 *)((v << 1) + (a ^ 1)); \
48 #define MAKE_68K_READ16(name, map) \
53 v = map[a >> M68K_MEM_SHIFT]; \
55 return ((cpu68k_read_f *)(v << 1))(a); \
57 return *(u16 *)((v << 1) + a); \
60 #define MAKE_68K_READ32(name, map) \
66 v = map[a >> M68K_MEM_SHIFT]; \
68 if (v & 0x80000000) { \
69 d = ((cpu68k_read_f *)vs)(a) << 16; \
70 d |= ((cpu68k_read_f *)vs)(a + 2); \
73 u16 *m = (u16 *)(vs + a); \
74 d = (m[0] << 16) | m[1]; \
79 #define MAKE_68K_WRITE8(name, map) \
80 void name(u32 a, u8 d) \
84 v = map[a >> M68K_MEM_SHIFT]; \
86 ((cpu68k_write_f *)(v << 1))(a, d); \
88 *(u8 *)((v << 1) + (a ^ 1)) = d; \
91 #define MAKE_68K_WRITE16(name, map) \
92 void name(u32 a, u16 d) \
96 v = map[a >> M68K_MEM_SHIFT]; \
98 ((cpu68k_write_f *)(v << 1))(a, d); \
100 *(u16 *)((v << 1) + a) = d; \
103 #define MAKE_68K_WRITE32(name, map) \
104 void name(u32 a, u32 d) \
108 v = map[a >> M68K_MEM_SHIFT]; \
110 if (v & 0x80000000) { \
111 ((cpu68k_write_f *)vs)(a, d >> 16); \
112 ((cpu68k_write_f *)vs)(a + 2, d); \
115 u16 *m = (u16 *)(vs + a); \