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Annotation of previous/src/uae-cpu/memory.h, revision 1.1

1.1     ! root        1:  /*
        !             2:   * UAE - The Un*x Amiga Emulator
        !             3:   *
        !             4:   * memory management
        !             5:   *
        !             6:   * Copyright 1995 Bernd Schmidt
        !             7:   *
        !             8:   * Adaptation to Hatari by Thomas Huth
        !             9:   *
        !            10:   * This file is distributed under the GNU Public License, version 2 or at
        !            11:   * your option any later version. Read the file gpl.txt for details.
        !            12:   */
        !            13: 
        !            14: #ifndef UAE_MEMORY_H
        !            15: #define UAE_MEMORY_H
        !            16: 
        !            17: #include "maccess.h"
        !            18: 
        !            19: #define call_mem_get_func(func, addr) ((*func)(addr))
        !            20: #define call_mem_put_func(func, addr, v) ((*func)(addr, v))
        !            21: 
        !            22: #define NEXT_SCREEN_SIZE       0x00040000
        !            23: extern uae_u8 NEXTVideo[256*1024];
        !            24: 
        !            25: 
        !            26: /* Enabling this adds one additional native memory reference per 68k memory
        !            27:  * access, but saves one shift (on the x86). Enabling this is probably
        !            28:  * better for the cache. My favourite benchmark (PP2) doesn't show a
        !            29:  * difference, so I leave this enabled. */
        !            30: #if 1 || defined SAVE_MEMORY
        !            31: #define SAVE_MEMORY_BANKS
        !            32: #endif
        !            33: 
        !            34: 
        !            35: typedef uae_u32 (*mem_get_func)(uaecptr) REGPARAM;
        !            36: typedef void (*mem_put_func)(uaecptr, uae_u32) REGPARAM;
        !            37: typedef uae_u8 *(*xlate_func)(uaecptr) REGPARAM;
        !            38: typedef int (*check_func)(uaecptr, uae_u32) REGPARAM;
        !            39: 
        !            40: extern char *address_space, *good_address_map;
        !            41: 
        !            42: 
        !            43: typedef struct {
        !            44:     /* These ones should be self-explanatory... */
        !            45:     mem_get_func lget, wget, bget;
        !            46:     mem_put_func lput, wput, bput;
        !            47:     /* Use xlateaddr to translate an Atari address to a uae_u8 * that can
        !            48:      * be used to address memory without calling the wget/wput functions.
        !            49:      * This doesn't work for all memory banks, so this function may call
        !            50:      * abort(). */
        !            51:     xlate_func xlateaddr;
        !            52:     /* To prevent calls to abort(), use check before calling xlateaddr.
        !            53:      * It checks not only that the memory bank can do xlateaddr, but also
        !            54:      * that the pointer points to an area of at least the specified size.
        !            55:      * This is used for example to translate bitplane pointers in custom.c */
        !            56:     check_func check;
        !            57: } addrbank;
        !            58: 
        !            59: 
        !            60: #define bankindex(addr) (((uaecptr)(addr)) >> 16)
        !            61: 
        !            62: #ifdef SAVE_MEMORY_BANKS
        !            63: extern addrbank *mem_banks[65536];
        !            64: #define get_mem_bank(addr) (*mem_banks[bankindex(addr)])
        !            65: #define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = (b))
        !            66: #else
        !            67: extern addrbank mem_banks[65536];
        !            68: #define get_mem_bank(addr) (mem_banks[bankindex(addr)])
        !            69: #define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = *(b))
        !            70: #endif
        !            71: 
        !            72: extern void memory_init(uae_u32 nNewNEXTMemSize);
        !            73: extern void memory_uninit (void);
        !            74: extern void map_banks(addrbank *bank, int first, int count);
        !            75: 
        !            76: #ifndef NO_INLINE_MEMORY_ACCESS
        !            77: 
        !            78: #define longget(addr) (call_mem_get_func(get_mem_bank(addr).lget, addr))
        !            79: #define wordget(addr) (call_mem_get_func(get_mem_bank(addr).wget, addr))
        !            80: #define byteget(addr) (call_mem_get_func(get_mem_bank(addr).bget, addr))
        !            81: #define longput(addr,l) (call_mem_put_func(get_mem_bank(addr).lput, addr, l))
        !            82: #define wordput(addr,w) (call_mem_put_func(get_mem_bank(addr).wput, addr, w))
        !            83: #define byteput(addr,b) (call_mem_put_func(get_mem_bank(addr).bput, addr, b))
        !            84: 
        !            85: #else
        !            86: 
        !            87: extern uae_u32 alongget(uaecptr addr);
        !            88: extern uae_u32 awordget(uaecptr addr);
        !            89: extern uae_u32 longget(uaecptr addr);
        !            90: extern uae_u32 wordget(uaecptr addr);
        !            91: extern uae_u32 byteget(uaecptr addr);
        !            92: extern void longput(uaecptr addr, uae_u32 l);
        !            93: extern void wordput(uaecptr addr, uae_u32 w);
        !            94: extern void byteput(uaecptr addr, uae_u32 b);
        !            95: 
        !            96: #endif
        !            97: 
        !            98: 
        !            99: static inline uae_u32 get_long(uaecptr addr)
        !           100: {
        !           101:     return longget(addr);
        !           102: }
        !           103: 
        !           104: static inline uae_u32 get_word(uaecptr addr)
        !           105: {
        !           106:     return wordget(addr);
        !           107: }
        !           108: 
        !           109: static inline uae_u32 get_byte(uaecptr addr)
        !           110: {
        !           111:     return byteget(addr);
        !           112: }
        !           113: 
        !           114: static inline void put_long(uaecptr addr, uae_u32 l)
        !           115: {
        !           116:     longput(addr, l);
        !           117: }
        !           118: 
        !           119: static inline void put_word(uaecptr addr, uae_u32 w)
        !           120: {
        !           121:     wordput(addr, w);
        !           122: }
        !           123: 
        !           124: static inline void put_byte(uaecptr addr, uae_u32 b)
        !           125: {
        !           126:     byteput(addr, b);
        !           127: }
        !           128: 
        !           129: static inline uae_u8 *get_real_address(uaecptr addr)
        !           130: {
        !           131:     return get_mem_bank(addr).xlateaddr(addr);
        !           132: }
        !           133: 
        !           134: static inline int valid_address(uaecptr addr, uae_u32 size)
        !           135: {
        !           136:     return get_mem_bank(addr).check(addr, size);
        !           137: }
        !           138: 
        !           139: 
        !           140: #endif /* UAE_MEMORY_H */

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