Annotation of frontvm/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: 
        !            20: /* Enabling this adds one additional native memory reference per 68k memory
        !            21:  * access, but saves one shift (on the x86). Enabling this is probably
        !            22:  * better for the cache. My favourite benchmark (PP2) doesn't show a
        !            23:  * difference, so I leave this enabled. */
        !            24: #if 1 || defined SAVE_MEMORY
        !            25: #define SAVE_MEMORY_BANKS
        !            26: #endif
        !            27: 
        !            28: 
        !            29: typedef uae_u32 (*mem_get_func)(uaecptr) REGPARAM;
        !            30: typedef void (*mem_put_func)(uaecptr, uae_u32) REGPARAM;
        !            31: typedef uae_u8 *(*xlate_func)(uaecptr) REGPARAM;
        !            32: typedef int (*check_func)(uaecptr, uae_u32) REGPARAM;
        !            33: 
        !            34: extern char *address_space, *good_address_map;
        !            35: 
        !            36: #undef DIRECT_MEMFUNCS_SUCCESSFUL
        !            37: 
        !            38: 
        !            39: typedef struct {
        !            40:     /* These ones should be self-explanatory... */
        !            41:     mem_get_func lget, wget, bget;
        !            42:     mem_put_func lput, wput, bput;
        !            43:     /* Use xlateaddr to translate an Atari address to a uae_u8 * that can
        !            44:      * be used to address memory without calling the wget/wput functions.
        !            45:      * This doesn't work for all memory banks, so this function may call
        !            46:      * abort(). */
        !            47:     xlate_func xlateaddr;
        !            48:     /* To prevent calls to abort(), use check before calling xlateaddr.
        !            49:      * It checks not only that the memory bank can do xlateaddr, but also
        !            50:      * that the pointer points to an area of at least the specified size.
        !            51:      * This is used for example to translate bitplane pointers in custom.c */
        !            52:     check_func check;
        !            53: } addrbank;
        !            54: 
        !            55: 
        !            56: #define bankindex(addr) (((uaecptr)(addr)) >> 16)
        !            57: 
        !            58: #ifdef SAVE_MEMORY_BANKS
        !            59: extern addrbank *mem_banks[65536];
        !            60: #define get_mem_bank(addr) (*mem_banks[bankindex(addr)])
        !            61: #define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = (b))
        !            62: #else
        !            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: #endif
        !            67: 
        !            68: extern void memory_init(uae_u32 f_STMemSize, uae_u32 f_TTMemSize, uae_u32 f_RomMemStart);
        !            69: extern void memory_uninit (void);
        !            70: extern void map_banks(addrbank *bank, int first, int count);
        !            71: 
        !            72: #ifndef NO_INLINE_MEMORY_ACCESS
        !            73: 
        !            74: #define longget(addr) (call_mem_get_func(get_mem_bank(addr).lget, addr))
        !            75: #define wordget(addr) (call_mem_get_func(get_mem_bank(addr).wget, addr))
        !            76: #define byteget(addr) (call_mem_get_func(get_mem_bank(addr).bget, addr))
        !            77: #define longput(addr,l) (call_mem_put_func(get_mem_bank(addr).lput, addr, l))
        !            78: #define wordput(addr,w) (call_mem_put_func(get_mem_bank(addr).wput, addr, w))
        !            79: #define byteput(addr,b) (call_mem_put_func(get_mem_bank(addr).bput, addr, b))
        !            80: 
        !            81: #else
        !            82: 
        !            83: extern uae_u32 alongget(uaecptr addr);
        !            84: extern uae_u32 awordget(uaecptr addr);
        !            85: extern uae_u32 longget(uaecptr addr);
        !            86: extern uae_u32 wordget(uaecptr addr);
        !            87: extern uae_u32 byteget(uaecptr addr);
        !            88: extern void longput(uaecptr addr, uae_u32 l);
        !            89: extern void wordput(uaecptr addr, uae_u32 w);
        !            90: extern void byteput(uaecptr addr, uae_u32 b);
        !            91: 
        !            92: #endif
        !            93: 
        !            94: #ifndef MD_HAVE_MEM_1_FUNCS
        !            95: 
        !            96: #define longget_1 longget
        !            97: #define wordget_1 wordget
        !            98: #define byteget_1 byteget
        !            99: #define longput_1 longput
        !           100: #define wordput_1 wordput
        !           101: #define byteput_1 byteput
        !           102: 
        !           103: #endif
        !           104: 
        !           105: STATIC_INLINE uae_u32 get_long(uaecptr addr)
        !           106: {
        !           107:     return longget_1(addr);
        !           108: }
        !           109: STATIC_INLINE uae_u32 get_word(uaecptr addr)
        !           110: {
        !           111:     return wordget_1(addr);
        !           112: }
        !           113: STATIC_INLINE uae_u32 get_byte(uaecptr addr)
        !           114: {
        !           115:     return byteget_1(addr);
        !           116: }
        !           117: STATIC_INLINE void put_long(uaecptr addr, uae_u32 l)
        !           118: {
        !           119:     longput_1(addr, l);
        !           120: }
        !           121: STATIC_INLINE void put_word(uaecptr addr, uae_u32 w)
        !           122: {
        !           123:     wordput_1(addr, w);
        !           124: }
        !           125: STATIC_INLINE void put_byte(uaecptr addr, uae_u32 b)
        !           126: {
        !           127:     byteput_1(addr, b);
        !           128: }
        !           129: 
        !           130: STATIC_INLINE uae_u8 *get_real_address(uaecptr addr)
        !           131: {
        !           132:     return get_mem_bank(addr).xlateaddr(addr);
        !           133: }
        !           134: 
        !           135: STATIC_INLINE int valid_address(uaecptr addr, uae_u32 size)
        !           136: {
        !           137:     return get_mem_bank(addr).check(addr, size);
        !           138: }
        !           139: 
        !           140: 
        !           141: #endif /* UAE_MEMORY_H */

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