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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; |
6 | |
7 | #define M68K_MEM_SHIFT 16 |
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8 | // minimum size we can map |
9 | #define M68K_BANK_SIZE (1 << M68K_MEM_SHIFT) |
10 | #define M68K_BANK_MASK (M68K_BANK_SIZE - 1) |
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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, |
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23 | const void *func_or_mh, int is_func); |
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24 | void cpu68k_map_set(unsigned long *map, int start_addr, int end_addr, |
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25 | const void *func_or_mh, int is_func); |
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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 | |