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new memory handling, but asm and mappers need update.

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Some cleanup and magic bit removal as a bonus.


git-svn-id: file:///home/notaz/opt/svn/PicoDrive@768 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-09-02 16:05:54 +00:00
parent c238eec8f5
commit af37bca858
20 changed files with 1173 additions and 1720 deletions
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116
pico/memory.h Normal file
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@ -0,0 +1,116 @@
// memory map related stuff
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
#define M68K_MEM_SHIFT 16
extern unsigned long m68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
extern unsigned long m68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
extern unsigned long m68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
extern unsigned long m68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
extern unsigned long s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
extern unsigned long s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
extern unsigned long s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
extern unsigned long s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
void z80_map_set(unsigned long *map, int start_addr, int end_addr,
void *func_or_mh, int is_func);
void cpu68k_map_set(unsigned long *map, int start_addr, int end_addr,
void *func_or_mh, int is_func);
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 MAKE_68K_READ8(name, map) \
u32 name(u32 a) \
{ \
unsigned long v; \
a &= 0x00ffffff; \
v = map[a >> M68K_MEM_SHIFT]; \
if (v & 0x80000000) \
return ((cpu68k_read_f *)(v << 1))(a); \
else \
return *(u8 *)((v << 1) + (a ^ 1)); \
}
#define MAKE_68K_READ16(name, map) \
u32 name(u32 a) \
{ \
unsigned long v; \
a &= 0x00fffffe; \
v = map[a >> M68K_MEM_SHIFT]; \
if (v & 0x80000000) \
return ((cpu68k_read_f *)(v << 1))(a); \
else \
return *(u16 *)((v << 1) + a); \
}
#define MAKE_68K_READ32(name, map) \
u32 name(u32 a) \
{ \
unsigned long v, vs; \
u32 d; \
a &= 0x00fffffe; \
v = map[a >> M68K_MEM_SHIFT]; \
vs = v << 1; \
if (v & 0x80000000) { \
d = ((cpu68k_read_f *)vs)(a) << 16; \
d |= ((cpu68k_read_f *)vs)(a + 2); \
} \
else { \
u16 *m = (u16 *)(vs + a); \
d = (m[0] << 16) | m[1]; \
} \
return d; \
}
#define MAKE_68K_WRITE8(name, map) \
void name(u32 a, u8 d) \
{ \
unsigned long v; \
a &= 0x00ffffff; \
v = map[a >> M68K_MEM_SHIFT]; \
if (v & 0x80000000) \
((cpu68k_write_f *)(v << 1))(a, d); \
else \
*(u8 *)((v << 1) + (a ^ 1)) = d; \
}
#define MAKE_68K_WRITE16(name, map) \
void name(u32 a, u16 d) \
{ \
unsigned long v; \
a &= 0x00fffffe; \
v = map[a >> M68K_MEM_SHIFT]; \
if (v & 0x80000000) \
((cpu68k_write_f *)(v << 1))(a, d); \
else \
*(u16 *)((v << 1) + a) = d; \
}
#define MAKE_68K_WRITE32(name, map) \
void name(u32 a, u32 d) \
{ \
unsigned long v, vs; \
a &= 0x00fffffe; \
v = map[a >> M68K_MEM_SHIFT]; \
vs = v << 1; \
if (v & 0x80000000) { \
((cpu68k_write_f *)vs)(a, d >> 16); \
((cpu68k_write_f *)vs)(a + 2, d); \
} \
else { \
u16 *m = (u16 *)(vs + a); \
m[0] = d >> 16; \
m[1] = d; \
} \
}