// memory map related stuff
+#include "pico_port.h"
+
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
-typedef unsigned long uptr; // unsigned pointer-sized int
+typedef uintptr_t uptr; // unsigned pointer-sized int
#define M68K_MEM_SHIFT 16
// minimum size we can map
extern uptr s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
extern uptr s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
+// top-level handlers that cores can use
+// (or alternatively build them into themselves)
+// XXX: unhandled: *16 and *32 might cross the bank boundaries
+typedef u32 (cpu68k_read_f)(u32 a);
+typedef void (cpu68k_write_f)(u32 a, u32 d);
+
+extern u32 m68k_read8(u32 a);
+extern u32 m68k_read16(u32 a);
+extern void m68k_write8(u32 a, u8 d);
+extern void m68k_write16(u32 a, u16 d);
+
+// z80
+#define Z80_MEM_SHIFT 13
+extern uptr z80_read_map [0x10000 >> Z80_MEM_SHIFT];
+extern uptr z80_write_map[0x10000 >> Z80_MEM_SHIFT];
+typedef unsigned char (z80_read_f)(unsigned short a);
+typedef void (z80_write_f)(unsigned int a, unsigned char data);
+
void z80_map_set(uptr *map, int start_addr, int end_addr,
const void *func_or_mh, int is_func);
void cpu68k_map_set(uptr *map, int start_addr, int end_addr,
void cpu68k_map_all_ram(int start_addr, int end_addr, void *ptr, int is_sub);
void m68k_map_unmap(int start_addr, int end_addr);
-// top-level handlers that cores can use
-// (or alternatively build them into themselves)
-// XXX: unhandled: *16 and *32 might cross the bank boundaries
-typedef u32 (cpu68k_read_f)(u32 a);
-typedef void (cpu68k_write_f)(u32 a, u32 d);
+#define MAP_FLAG ((uptr)1 << (sizeof(uptr) * 8 - 1))
+#define map_flag_set(x) ((x) & MAP_FLAG)
#define MAKE_68K_READ8(name, map) \
u32 name(u32 a) \
uptr v; \
a &= 0x00ffffff; \
v = map[a >> M68K_MEM_SHIFT]; \
- if (v & 0x80000000) \
+ if (map_flag_set(v)) \
return ((cpu68k_read_f *)(v << 1))(a); \
else \
return *(u8 *)((v << 1) + (a ^ 1)); \
uptr v; \
a &= 0x00fffffe; \
v = map[a >> M68K_MEM_SHIFT]; \
- if (v & 0x80000000) \
+ if (map_flag_set(v)) \
return ((cpu68k_read_f *)(v << 1))(a); \
else \
return *(u16 *)((v << 1) + a); \
a &= 0x00fffffe; \
v = map[a >> M68K_MEM_SHIFT]; \
vs = v << 1; \
- if (v & 0x80000000) { \
+ if (map_flag_set(v)) { \
d = ((cpu68k_read_f *)vs)(a) << 16; \
d |= ((cpu68k_read_f *)vs)(a + 2); \
} \
uptr v; \
a &= 0x00ffffff; \
v = map[a >> M68K_MEM_SHIFT]; \
- if (v & 0x80000000) \
+ if (map_flag_set(v)) \
((cpu68k_write_f *)(v << 1))(a, d); \
else \
*(u8 *)((v << 1) + (a ^ 1)) = d; \
uptr v; \
a &= 0x00fffffe; \
v = map[a >> M68K_MEM_SHIFT]; \
- if (v & 0x80000000) \
+ if (map_flag_set(v)) \
((cpu68k_write_f *)(v << 1))(a, d); \
else \
*(u16 *)((v << 1) + a) = d; \
a &= 0x00fffffe; \
v = map[a >> M68K_MEM_SHIFT]; \
vs = v << 1; \
- if (v & 0x80000000) { \
+ if (map_flag_set(v)) { \
((cpu68k_write_f *)vs)(a, d >> 16); \
((cpu68k_write_f *)vs)(a + 2, d); \
} \
} \
}
+#ifdef NEED_DMA_SOURCE // meh
+
+static __inline void *m68k_dma_source(u32 a)
+{
+ u8 *base;
+ uptr v;
+ v = m68k_read16_map[a >> M68K_MEM_SHIFT];
+ if (map_flag_set(v)) {
+ if (a >= Pico.romsize) // Rom
+ return NULL;
+ base = Pico.rom;
+ }
+ else
+ base = (void *)(v << 1);
+ return base + (a & 0xfe0000);
+}
+
+#endif
+
+// 32x
+typedef struct {
+ uptr addr; // stores (membase >> 1) or ((handler >> 1) | (1<<31))
+ u32 mask;
+} sh2_memmap;