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1 | // memory map related stuff |
2 | |
3 | typedef unsigned char u8; |
4 | typedef unsigned short u16; |
5 | typedef unsigned int u32; |
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6 | typedef unsigned long uptr; // unsigned pointer-sized int |
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7 | |
8 | #define M68K_MEM_SHIFT 16 |
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9 | // minimum size we can map |
10 | #define M68K_BANK_SIZE (1 << M68K_MEM_SHIFT) |
11 | #define M68K_BANK_MASK (M68K_BANK_SIZE - 1) |
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12 | |
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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]; |
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17 | |
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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]; |
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22 | |
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23 | void z80_map_set(uptr *map, int start_addr, int end_addr, |
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24 | const void *func_or_mh, int is_func); |
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25 | void cpu68k_map_set(uptr *map, int start_addr, int end_addr, |
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26 | const void *func_or_mh, int is_func); |
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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); |
29 | |
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); |
35 | |
36 | #define MAKE_68K_READ8(name, map) \ |
37 | u32 name(u32 a) \ |
38 | { \ |
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39 | uptr v; \ |
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40 | a &= 0x00ffffff; \ |
41 | v = map[a >> M68K_MEM_SHIFT]; \ |
42 | if (v & 0x80000000) \ |
43 | return ((cpu68k_read_f *)(v << 1))(a); \ |
44 | else \ |
45 | return *(u8 *)((v << 1) + (a ^ 1)); \ |
46 | } |
47 | |
48 | #define MAKE_68K_READ16(name, map) \ |
49 | u32 name(u32 a) \ |
50 | { \ |
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51 | uptr v; \ |
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52 | a &= 0x00fffffe; \ |
53 | v = map[a >> M68K_MEM_SHIFT]; \ |
54 | if (v & 0x80000000) \ |
55 | return ((cpu68k_read_f *)(v << 1))(a); \ |
56 | else \ |
57 | return *(u16 *)((v << 1) + a); \ |
58 | } |
59 | |
60 | #define MAKE_68K_READ32(name, map) \ |
61 | u32 name(u32 a) \ |
62 | { \ |
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63 | uptr v, vs; \ |
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64 | u32 d; \ |
65 | a &= 0x00fffffe; \ |
66 | v = map[a >> M68K_MEM_SHIFT]; \ |
67 | vs = v << 1; \ |
68 | if (v & 0x80000000) { \ |
69 | d = ((cpu68k_read_f *)vs)(a) << 16; \ |
70 | d |= ((cpu68k_read_f *)vs)(a + 2); \ |
71 | } \ |
72 | else { \ |
73 | u16 *m = (u16 *)(vs + a); \ |
74 | d = (m[0] << 16) | m[1]; \ |
75 | } \ |
76 | return d; \ |
77 | } |
78 | |
79 | #define MAKE_68K_WRITE8(name, map) \ |
80 | void name(u32 a, u8 d) \ |
81 | { \ |
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82 | uptr v; \ |
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83 | a &= 0x00ffffff; \ |
84 | v = map[a >> M68K_MEM_SHIFT]; \ |
85 | if (v & 0x80000000) \ |
86 | ((cpu68k_write_f *)(v << 1))(a, d); \ |
87 | else \ |
88 | *(u8 *)((v << 1) + (a ^ 1)) = d; \ |
89 | } |
90 | |
91 | #define MAKE_68K_WRITE16(name, map) \ |
92 | void name(u32 a, u16 d) \ |
93 | { \ |
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94 | uptr v; \ |
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95 | a &= 0x00fffffe; \ |
96 | v = map[a >> M68K_MEM_SHIFT]; \ |
97 | if (v & 0x80000000) \ |
98 | ((cpu68k_write_f *)(v << 1))(a, d); \ |
99 | else \ |
100 | *(u16 *)((v << 1) + a) = d; \ |
101 | } |
102 | |
103 | #define MAKE_68K_WRITE32(name, map) \ |
104 | void name(u32 a, u32 d) \ |
105 | { \ |
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106 | uptr v, vs; \ |
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107 | a &= 0x00fffffe; \ |
108 | v = map[a >> M68K_MEM_SHIFT]; \ |
109 | vs = v << 1; \ |
110 | if (v & 0x80000000) { \ |
111 | ((cpu68k_write_f *)vs)(a, d >> 16); \ |
112 | ((cpu68k_write_f *)vs)(a + 2, d); \ |
113 | } \ |
114 | else { \ |
115 | u16 *m = (u16 *)(vs + a); \ |
116 | m[0] = d >> 16; \ |
117 | m[1] = d; \ |
118 | } \ |
119 | } |
120 | |