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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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/* |
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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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#ifndef UAE_MEMORY_H |
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#define UAE_MEMORY_H |
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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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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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* 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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/* 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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#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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#endif |
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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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return ntohl(*(uae_u32 *)addr); |
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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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return ntohs(*(uae_u16 *)addr); |
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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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return *(uae_u8 *)addr; |
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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 *)addr = htonl(l); |
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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 *)addr = htons(w); |
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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 *)addr = b; |
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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 (uae_u8 *)addr; |
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return do_get_real_address(addr); |
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} |
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static __inline__ int valid_address(uaecptr addr, uae_u32 size) |
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static __inline__ uae_u32 get_virtual_address(uae_u8 *addr) |
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{ |
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return 1; |
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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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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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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 /* MEMORY_H */ |
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#endif |
