memory.h 4.9 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119
  1. // memory map related stuff
  2. typedef unsigned char u8;
  3. typedef unsigned short u16;
  4. typedef unsigned int u32;
  5. #define M68K_MEM_SHIFT 16
  6. // minimum size we can map
  7. #define M68K_BANK_SIZE (1 << M68K_MEM_SHIFT)
  8. #define M68K_BANK_MASK (M68K_BANK_SIZE - 1)
  9. extern unsigned long m68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
  10. extern unsigned long m68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
  11. extern unsigned long m68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
  12. extern unsigned long m68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
  13. extern unsigned long s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
  14. extern unsigned long s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
  15. extern unsigned long s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
  16. extern unsigned long s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
  17. void z80_map_set(unsigned long *map, int start_addr, int end_addr,
  18. void *func_or_mh, int is_func);
  19. void cpu68k_map_set(unsigned long *map, int start_addr, int end_addr,
  20. void *func_or_mh, int is_func);
  21. void cpu68k_map_all_ram(int start_addr, int end_addr, void *ptr, int is_sub);
  22. void m68k_map_unmap(int start_addr, int end_addr);
  23. // top-level handlers that cores can use
  24. // (or alternatively build them into themselves)
  25. // XXX: unhandled: *16 and *32 might cross the bank boundaries
  26. typedef u32 (cpu68k_read_f)(u32 a);
  27. typedef void (cpu68k_write_f)(u32 a, u32 d);
  28. #define MAKE_68K_READ8(name, map) \
  29. u32 name(u32 a) \
  30. { \
  31. unsigned long v; \
  32. a &= 0x00ffffff; \
  33. v = map[a >> M68K_MEM_SHIFT]; \
  34. if (v & 0x80000000) \
  35. return ((cpu68k_read_f *)(v << 1))(a); \
  36. else \
  37. return *(u8 *)((v << 1) + (a ^ 1)); \
  38. }
  39. #define MAKE_68K_READ16(name, map) \
  40. u32 name(u32 a) \
  41. { \
  42. unsigned long v; \
  43. a &= 0x00fffffe; \
  44. v = map[a >> M68K_MEM_SHIFT]; \
  45. if (v & 0x80000000) \
  46. return ((cpu68k_read_f *)(v << 1))(a); \
  47. else \
  48. return *(u16 *)((v << 1) + a); \
  49. }
  50. #define MAKE_68K_READ32(name, map) \
  51. u32 name(u32 a) \
  52. { \
  53. unsigned long v, vs; \
  54. u32 d; \
  55. a &= 0x00fffffe; \
  56. v = map[a >> M68K_MEM_SHIFT]; \
  57. vs = v << 1; \
  58. if (v & 0x80000000) { \
  59. d = ((cpu68k_read_f *)vs)(a) << 16; \
  60. d |= ((cpu68k_read_f *)vs)(a + 2); \
  61. } \
  62. else { \
  63. u16 *m = (u16 *)(vs + a); \
  64. d = (m[0] << 16) | m[1]; \
  65. } \
  66. return d; \
  67. }
  68. #define MAKE_68K_WRITE8(name, map) \
  69. void name(u32 a, u8 d) \
  70. { \
  71. unsigned long v; \
  72. a &= 0x00ffffff; \
  73. v = map[a >> M68K_MEM_SHIFT]; \
  74. if (v & 0x80000000) \
  75. ((cpu68k_write_f *)(v << 1))(a, d); \
  76. else \
  77. *(u8 *)((v << 1) + (a ^ 1)) = d; \
  78. }
  79. #define MAKE_68K_WRITE16(name, map) \
  80. void name(u32 a, u16 d) \
  81. { \
  82. unsigned long v; \
  83. a &= 0x00fffffe; \
  84. v = map[a >> M68K_MEM_SHIFT]; \
  85. if (v & 0x80000000) \
  86. ((cpu68k_write_f *)(v << 1))(a, d); \
  87. else \
  88. *(u16 *)((v << 1) + a) = d; \
  89. }
  90. #define MAKE_68K_WRITE32(name, map) \
  91. void name(u32 a, u32 d) \
  92. { \
  93. unsigned long v, vs; \
  94. a &= 0x00fffffe; \
  95. v = map[a >> M68K_MEM_SHIFT]; \
  96. vs = v << 1; \
  97. if (v & 0x80000000) { \
  98. ((cpu68k_write_f *)vs)(a, d >> 16); \
  99. ((cpu68k_write_f *)vs)(a + 2, d); \
  100. } \
  101. else { \
  102. u16 *m = (u16 *)(vs + a); \
  103. m[0] = d >> 16; \
  104. m[1] = d; \
  105. } \
  106. }