memory.h 5.8 KB

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  1. // memory map related stuff
  2. typedef unsigned char u8;
  3. typedef unsigned short u16;
  4. typedef unsigned int u32;
  5. typedef unsigned long uptr; // unsigned pointer-sized int
  6. #define M68K_MEM_SHIFT 16
  7. // minimum size we can map
  8. #define M68K_BANK_SIZE (1 << M68K_MEM_SHIFT)
  9. #define M68K_BANK_MASK (M68K_BANK_SIZE - 1)
  10. extern uptr m68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
  11. extern uptr m68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
  12. extern uptr m68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
  13. extern uptr m68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
  14. extern uptr s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
  15. extern uptr s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
  16. extern uptr s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
  17. extern uptr s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
  18. // top-level handlers that cores can use
  19. // (or alternatively build them into themselves)
  20. // XXX: unhandled: *16 and *32 might cross the bank boundaries
  21. typedef u32 (cpu68k_read_f)(u32 a);
  22. typedef void (cpu68k_write_f)(u32 a, u32 d);
  23. extern u32 m68k_read8(u32 a);
  24. extern u32 m68k_read16(u32 a);
  25. extern void m68k_write8(u32 a, u8 d);
  26. extern void m68k_write16(u32 a, u16 d);
  27. // z80
  28. #define Z80_MEM_SHIFT 13
  29. extern uptr z80_read_map [0x10000 >> Z80_MEM_SHIFT];
  30. extern uptr z80_write_map[0x10000 >> Z80_MEM_SHIFT];
  31. typedef unsigned char (z80_read_f)(unsigned short a);
  32. typedef void (z80_write_f)(unsigned int a, unsigned char data);
  33. void z80_map_set(uptr *map, int start_addr, int end_addr,
  34. const void *func_or_mh, int is_func);
  35. void cpu68k_map_set(uptr *map, int start_addr, int end_addr,
  36. const void *func_or_mh, int is_func);
  37. void cpu68k_map_all_ram(int start_addr, int end_addr, void *ptr, int is_sub);
  38. void m68k_map_unmap(int start_addr, int end_addr);
  39. #define MAP_FLAG ((uptr)1 << (sizeof(uptr) * 8 - 1))
  40. #define map_flag_set(x) ((x) & MAP_FLAG)
  41. #define MAKE_68K_READ8(name, map) \
  42. u32 name(u32 a) \
  43. { \
  44. uptr v; \
  45. a &= 0x00ffffff; \
  46. v = map[a >> M68K_MEM_SHIFT]; \
  47. if (map_flag_set(v)) \
  48. return ((cpu68k_read_f *)(v << 1))(a); \
  49. else \
  50. return *(u8 *)((v << 1) + (a ^ 1)); \
  51. }
  52. #define MAKE_68K_READ16(name, map) \
  53. u32 name(u32 a) \
  54. { \
  55. uptr v; \
  56. a &= 0x00fffffe; \
  57. v = map[a >> M68K_MEM_SHIFT]; \
  58. if (map_flag_set(v)) \
  59. return ((cpu68k_read_f *)(v << 1))(a); \
  60. else \
  61. return *(u16 *)((v << 1) + a); \
  62. }
  63. #define MAKE_68K_READ32(name, map) \
  64. u32 name(u32 a) \
  65. { \
  66. uptr v, vs; \
  67. u32 d; \
  68. a &= 0x00fffffe; \
  69. v = map[a >> M68K_MEM_SHIFT]; \
  70. vs = v << 1; \
  71. if (map_flag_set(v)) { \
  72. d = ((cpu68k_read_f *)vs)(a) << 16; \
  73. d |= ((cpu68k_read_f *)vs)(a + 2); \
  74. } \
  75. else { \
  76. u16 *m = (u16 *)(vs + a); \
  77. d = (m[0] << 16) | m[1]; \
  78. } \
  79. return d; \
  80. }
  81. #define MAKE_68K_WRITE8(name, map) \
  82. void name(u32 a, u8 d) \
  83. { \
  84. uptr v; \
  85. a &= 0x00ffffff; \
  86. v = map[a >> M68K_MEM_SHIFT]; \
  87. if (map_flag_set(v)) \
  88. ((cpu68k_write_f *)(v << 1))(a, d); \
  89. else \
  90. *(u8 *)((v << 1) + (a ^ 1)) = d; \
  91. }
  92. #define MAKE_68K_WRITE16(name, map) \
  93. void name(u32 a, u16 d) \
  94. { \
  95. uptr v; \
  96. a &= 0x00fffffe; \
  97. v = map[a >> M68K_MEM_SHIFT]; \
  98. if (map_flag_set(v)) \
  99. ((cpu68k_write_f *)(v << 1))(a, d); \
  100. else \
  101. *(u16 *)((v << 1) + a) = d; \
  102. }
  103. #define MAKE_68K_WRITE32(name, map) \
  104. void name(u32 a, u32 d) \
  105. { \
  106. uptr v, vs; \
  107. a &= 0x00fffffe; \
  108. v = map[a >> M68K_MEM_SHIFT]; \
  109. vs = v << 1; \
  110. if (map_flag_set(v)) { \
  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. #ifdef NEED_DMA_SOURCE // meh
  121. static __inline void *m68k_dma_source(u32 a)
  122. {
  123. u8 *base;
  124. uptr v;
  125. v = m68k_read16_map[a >> M68K_MEM_SHIFT];
  126. if (map_flag_set(v)) {
  127. if (a >= Pico.romsize) // Rom
  128. return NULL;
  129. base = Pico.rom;
  130. }
  131. else
  132. base = (void *)(v << 1);
  133. return base + (a & 0xfe0000);
  134. }
  135. #endif
  136. // 32x
  137. typedef struct {
  138. uptr addr; // stores (membase >> 1) or ((handler >> 1) | (1<<31))
  139. u32 mask;
  140. } sh2_memmap;