| af37bca8 |
1 | // memory map related stuff |
| 2 | |
| 3 | typedef unsigned char u8; |
| 4 | typedef unsigned short u16; |
| 5 | typedef unsigned int u32; |
| 6 | |
| 7 | #define M68K_MEM_SHIFT 16 |
| 45f2f245 |
8 | // minimum size we can map |
| 9 | #define M68K_BANK_SIZE (1 << M68K_MEM_SHIFT) |
| 10 | #define M68K_BANK_MASK (M68K_BANK_SIZE - 1) |
| af37bca8 |
11 | |
| 12 | extern unsigned long m68k_read8_map [0x1000000 >> M68K_MEM_SHIFT]; |
| 13 | extern unsigned long m68k_read16_map [0x1000000 >> M68K_MEM_SHIFT]; |
| 14 | extern unsigned long m68k_write8_map [0x1000000 >> M68K_MEM_SHIFT]; |
| 15 | extern unsigned long m68k_write16_map[0x1000000 >> M68K_MEM_SHIFT]; |
| 16 | |
| 17 | extern unsigned long s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT]; |
| 18 | extern unsigned long s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT]; |
| 19 | extern unsigned long s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT]; |
| 20 | extern unsigned long s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT]; |
| 21 | |
| 22 | void z80_map_set(unsigned long *map, int start_addr, int end_addr, |
| 23 | void *func_or_mh, int is_func); |
| 24 | void cpu68k_map_set(unsigned long *map, int start_addr, int end_addr, |
| 25 | void *func_or_mh, int is_func); |
| 26 | void cpu68k_map_all_ram(int start_addr, int end_addr, void *ptr, int is_sub); |
| 27 | void m68k_map_unmap(int start_addr, int end_addr); |
| 28 | |
| 29 | // top-level handlers that cores can use |
| 30 | // (or alternatively build them into themselves) |
| 31 | // XXX: unhandled: *16 and *32 might cross the bank boundaries |
| 32 | typedef u32 (cpu68k_read_f)(u32 a); |
| 33 | typedef void (cpu68k_write_f)(u32 a, u32 d); |
| 34 | |
| 35 | #define MAKE_68K_READ8(name, map) \ |
| 36 | u32 name(u32 a) \ |
| 37 | { \ |
| 38 | unsigned long v; \ |
| 39 | a &= 0x00ffffff; \ |
| 40 | v = map[a >> M68K_MEM_SHIFT]; \ |
| 41 | if (v & 0x80000000) \ |
| 42 | return ((cpu68k_read_f *)(v << 1))(a); \ |
| 43 | else \ |
| 44 | return *(u8 *)((v << 1) + (a ^ 1)); \ |
| 45 | } |
| 46 | |
| 47 | #define MAKE_68K_READ16(name, map) \ |
| 48 | u32 name(u32 a) \ |
| 49 | { \ |
| 50 | unsigned long v; \ |
| 51 | a &= 0x00fffffe; \ |
| 52 | v = map[a >> M68K_MEM_SHIFT]; \ |
| 53 | if (v & 0x80000000) \ |
| 54 | return ((cpu68k_read_f *)(v << 1))(a); \ |
| 55 | else \ |
| 56 | return *(u16 *)((v << 1) + a); \ |
| 57 | } |
| 58 | |
| 59 | #define MAKE_68K_READ32(name, map) \ |
| 60 | u32 name(u32 a) \ |
| 61 | { \ |
| 62 | unsigned long v, vs; \ |
| 63 | u32 d; \ |
| 64 | a &= 0x00fffffe; \ |
| 65 | v = map[a >> M68K_MEM_SHIFT]; \ |
| 66 | vs = v << 1; \ |
| 67 | if (v & 0x80000000) { \ |
| 68 | d = ((cpu68k_read_f *)vs)(a) << 16; \ |
| 69 | d |= ((cpu68k_read_f *)vs)(a + 2); \ |
| 70 | } \ |
| 71 | else { \ |
| 72 | u16 *m = (u16 *)(vs + a); \ |
| 73 | d = (m[0] << 16) | m[1]; \ |
| 74 | } \ |
| 75 | return d; \ |
| 76 | } |
| 77 | |
| 78 | #define MAKE_68K_WRITE8(name, map) \ |
| 79 | void name(u32 a, u8 d) \ |
| 80 | { \ |
| 81 | unsigned long v; \ |
| 82 | a &= 0x00ffffff; \ |
| 83 | v = map[a >> M68K_MEM_SHIFT]; \ |
| 84 | if (v & 0x80000000) \ |
| 85 | ((cpu68k_write_f *)(v << 1))(a, d); \ |
| 86 | else \ |
| 87 | *(u8 *)((v << 1) + (a ^ 1)) = d; \ |
| 88 | } |
| 89 | |
| 90 | #define MAKE_68K_WRITE16(name, map) \ |
| 91 | void name(u32 a, u16 d) \ |
| 92 | { \ |
| 93 | unsigned long v; \ |
| 94 | a &= 0x00fffffe; \ |
| 95 | v = map[a >> M68K_MEM_SHIFT]; \ |
| 96 | if (v & 0x80000000) \ |
| 97 | ((cpu68k_write_f *)(v << 1))(a, d); \ |
| 98 | else \ |
| 99 | *(u16 *)((v << 1) + a) = d; \ |
| 100 | } |
| 101 | |
| 102 | #define MAKE_68K_WRITE32(name, map) \ |
| 103 | void name(u32 a, u32 d) \ |
| 104 | { \ |
| 105 | unsigned long v, vs; \ |
| 106 | a &= 0x00fffffe; \ |
| 107 | v = map[a >> M68K_MEM_SHIFT]; \ |
| 108 | vs = v << 1; \ |
| 109 | if (v & 0x80000000) { \ |
| 110 | ((cpu68k_write_f *)vs)(a, d >> 16); \ |
| 111 | ((cpu68k_write_f *)vs)(a + 2, d); \ |
| 112 | } \ |
| 113 | else { \ |
| 114 | u16 *m = (u16 *)(vs + a); \ |
| 115 | m[0] = d >> 16; \ |
| 116 | m[1] = d; \ |
| 117 | } \ |
| 118 | } |
| 119 | |
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