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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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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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#ifndef UAE_MEMORY_H |
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#define UAE_MEMORY_H |
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|
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#if !DIRECT_ADDRESSING && !REAL_ADDRESSING |
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|
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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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|
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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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|
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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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|
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#undef DIRECT_MEMFUNCS_SUCCESSFUL |
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|
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#ifndef CAN_MAP_MEMORY |
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#undef USE_COMPILER |
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#endif |
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|
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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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|
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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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} addrbank; |
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|
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extern uae_u8 filesysory[65536]; |
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|
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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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|
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/* Default memory access functions */ |
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|
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extern uae_u8 *REGPARAM2 default_xlate(uaecptr addr) REGPARAM; |
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|
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#define bankindex(addr) (((uaecptr)(addr)) >> 16) |
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|
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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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|
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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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|
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#ifndef NO_INLINE_MEMORY_ACCESS |
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|
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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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|
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#else |
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|
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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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|
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#endif |
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|
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#ifndef MD_HAVE_MEM_1_FUNCS |
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|
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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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|
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#endif |
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|
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#endif /* !DIRECT_ADDRESSING && !REAL_ADDRESSING */ |
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|
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#if REAL_ADDRESSING |
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const uintptr MEMBaseDiff = 0; |
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#elif DIRECT_ADDRESSING |
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extern uintptr MEMBaseDiff; |
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#endif |
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|
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#if REAL_ADDRESSING || DIRECT_ADDRESSING |
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static __inline__ uae_u8 *do_get_real_address(uaecptr addr) |
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{ |
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return (uae_u8 *)MEMBaseDiff + addr; |
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} |
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static __inline__ uae_u32 do_get_virtual_address(uae_u8 *addr) |
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{ |
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return (uintptr)addr - MEMBaseDiff; |
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} |
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static __inline__ uae_u32 get_long(uaecptr addr) |
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{ |
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uae_u32 * const m = (uae_u32 *)do_get_real_address(addr); |
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return do_get_mem_long(m); |
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} |
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static __inline__ uae_u32 get_word(uaecptr addr) |
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{ |
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uae_u16 * const m = (uae_u16 *)do_get_real_address(addr); |
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return do_get_mem_word(m); |
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} |
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static __inline__ uae_u32 get_byte(uaecptr addr) |
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{ |
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uae_u8 * const m = (uae_u8 *)do_get_real_address(addr); |
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return do_get_mem_byte(m); |
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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 * const m = (uae_u32 *)do_get_real_address(addr); |
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do_put_mem_long(m, 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 * const m = (uae_u16 *)do_get_real_address(addr); |
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do_put_mem_word(m, 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 * const m = (uae_u8 *)do_get_real_address(addr); |
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do_put_mem_byte(m, 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 do_get_real_address(addr); |
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} |
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static __inline__ uae_u32 get_virtual_address(uae_u8 *addr) |
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{ |
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return do_get_virtual_address(addr); |
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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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/* gb-- deliberately not implemented since it shall not be used... */ |
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extern uae_u32 get_virtual_address(uae_u8 *addr); |
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#endif /* DIRECT_ADDRESSING || REAL_ADDRESSING */ |
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|
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#endif /* MEMORY_H */ |
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|
