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cebix |
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/* |
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* UAE - The Un*x Amiga Emulator |
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* |
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* memory management |
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* |
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* Copyright 1995 Bernd Schmidt |
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*/ |
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#ifndef UAE_MEMORY_H |
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#define UAE_MEMORY_H |
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/* Enabling this adds one additional native memory reference per 68k memory |
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* access, but saves one shift (on the x86). Enabling this is probably |
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* better for the cache. My favourite benchmark (PP2) doesn't show a |
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* difference, so I leave this enabled. */ |
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#if 1 || defined SAVE_MEMORY |
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#define SAVE_MEMORY_BANKS |
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#endif |
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typedef uae_u32 (REGPARAM2 *mem_get_func)(uaecptr) REGPARAM; |
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typedef void (REGPARAM2 *mem_put_func)(uaecptr, uae_u32) REGPARAM; |
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typedef uae_u8 *(REGPARAM2 *xlate_func)(uaecptr) REGPARAM; |
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typedef int (REGPARAM2 *check_func)(uaecptr, uae_u32) REGPARAM; |
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#undef DIRECT_MEMFUNCS_SUCCESSFUL |
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#ifndef CAN_MAP_MEMORY |
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#undef USE_COMPILER |
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#endif |
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#if defined(USE_COMPILER) && !defined(USE_MAPPED_MEMORY) |
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#define USE_MAPPED_MEMORY |
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#endif |
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typedef struct { |
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/* These ones should be self-explanatory... */ |
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mem_get_func lget, wget, bget; |
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mem_put_func lput, wput, bput; |
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/* Use xlateaddr to translate an Amiga address to a uae_u8 * that can |
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* be used to address memory without calling the wget/wput functions. |
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* This doesn't work for all memory banks, so this function may call |
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* abort(). */ |
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xlate_func xlateaddr; |
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/* To prevent calls to abort(), use check before calling xlateaddr. |
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* It checks not only that the memory bank can do xlateaddr, but also |
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* that the pointer points to an area of at least the specified size. |
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* This is used for example to translate bitplane pointers in custom.c */ |
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check_func check; |
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} addrbank; |
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extern uae_u8 filesysory[65536]; |
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extern addrbank ram_bank; // Mac RAM |
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extern addrbank rom_bank; // Mac ROM |
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extern addrbank frame_bank; // Frame buffer |
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/* Default memory access functions */ |
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extern int REGPARAM2 default_check(uaecptr addr, uae_u32 size) REGPARAM; |
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extern uae_u8 *REGPARAM2 default_xlate(uaecptr addr) REGPARAM; |
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#define bankindex(addr) (((uaecptr)(addr)) >> 16) |
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#ifdef SAVE_MEMORY_BANKS |
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extern addrbank *mem_banks[65536]; |
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#define get_mem_bank(addr) (*mem_banks[bankindex(addr)]) |
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#define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = (b)) |
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#else |
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extern addrbank mem_banks[65536]; |
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#define get_mem_bank(addr) (mem_banks[bankindex(addr)]) |
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#define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = *(b)) |
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#endif |
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extern void memory_init(void); |
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extern void map_banks(addrbank *bank, int first, int count); |
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#ifndef NO_INLINE_MEMORY_ACCESS |
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#define longget(addr) (call_mem_get_func(get_mem_bank(addr).lget, addr)) |
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#define wordget(addr) (call_mem_get_func(get_mem_bank(addr).wget, addr)) |
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#define byteget(addr) (call_mem_get_func(get_mem_bank(addr).bget, addr)) |
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#define longput(addr,l) (call_mem_put_func(get_mem_bank(addr).lput, addr, l)) |
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#define wordput(addr,w) (call_mem_put_func(get_mem_bank(addr).wput, addr, w)) |
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#define byteput(addr,b) (call_mem_put_func(get_mem_bank(addr).bput, addr, b)) |
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#else |
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extern uae_u32 alongget(uaecptr addr); |
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extern uae_u32 awordget(uaecptr addr); |
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extern uae_u32 longget(uaecptr addr); |
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extern uae_u32 wordget(uaecptr addr); |
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extern uae_u32 byteget(uaecptr addr); |
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extern void longput(uaecptr addr, uae_u32 l); |
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extern void wordput(uaecptr addr, uae_u32 w); |
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extern void byteput(uaecptr addr, uae_u32 b); |
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#endif |
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#ifndef MD_HAVE_MEM_1_FUNCS |
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#define longget_1 longget |
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#define wordget_1 wordget |
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#define byteget_1 byteget |
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#define longput_1 longput |
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#define wordput_1 wordput |
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#define byteput_1 byteput |
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#endif |
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#if REAL_ADDRESSING |
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static __inline__ uae_u32 get_long(uaecptr addr) |
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{ |
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return ntohl(*(uae_u32 *)addr); |
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} |
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static __inline__ uae_u32 get_word(uaecptr addr) |
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{ |
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return ntohs(*(uae_u16 *)addr); |
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} |
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static __inline__ uae_u32 get_byte(uaecptr addr) |
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{ |
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return *(uae_u8 *)addr; |
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} |
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static __inline__ void put_long(uaecptr addr, uae_u32 l) |
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{ |
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*(uae_u32 *)addr = htonl(l); |
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} |
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static __inline__ void put_word(uaecptr addr, uae_u32 w) |
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{ |
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*(uae_u16 *)addr = htons(w); |
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} |
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static __inline__ void put_byte(uaecptr addr, uae_u32 b) |
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{ |
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*(uae_u8 *)addr = b; |
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} |
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static __inline__ uae_u8 *get_real_address(uaecptr addr) |
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{ |
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return (uae_u8 *)addr; |
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} |
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static __inline__ int valid_address(uaecptr addr, uae_u32 size) |
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{ |
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return 1; |
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} |
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#else |
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static __inline__ uae_u32 get_long(uaecptr addr) |
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{ |
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return longget_1(addr); |
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} |
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static __inline__ uae_u32 get_word(uaecptr addr) |
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{ |
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return wordget_1(addr); |
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} |
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static __inline__ uae_u32 get_byte(uaecptr addr) |
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{ |
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return byteget_1(addr); |
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} |
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static __inline__ void put_long(uaecptr addr, uae_u32 l) |
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{ |
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longput_1(addr, l); |
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} |
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static __inline__ void put_word(uaecptr addr, uae_u32 w) |
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{ |
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wordput_1(addr, w); |
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} |
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static __inline__ void put_byte(uaecptr addr, uae_u32 b) |
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{ |
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byteput_1(addr, b); |
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} |
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static __inline__ uae_u8 *get_real_address(uaecptr addr) |
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{ |
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return get_mem_bank(addr).xlateaddr(addr); |
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} |
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static __inline__ int valid_address(uaecptr addr, uae_u32 size) |
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{ |
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return get_mem_bank(addr).check(addr, size); |
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} |
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#endif |
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#endif |
