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182 lines
4.8 KiB
C
182 lines
4.8 KiB
C
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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
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