Archipelago » qemu

/*

 *  Software MMU support

 * 

 *  Copyright (c) 2003 Fabrice Bellard

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#if DATA_SIZE == 8

#define SUFFIX q

#define DATA_TYPE uint64_t

#elif DATA_SIZE == 4

#define SUFFIX l

#define DATA_TYPE uint32_t

#elif DATA_SIZE == 2

#define SUFFIX w

#define DATA_TYPE uint16_t

#define DATA_STYPE int16_t

#elif DATA_SIZE == 1

#define SUFFIX b

#define DATA_TYPE uint8_t

#define DATA_STYPE int8_t

#else

#error unsupported data size

#endif

#if MEMUSER == 0

#define MEMSUFFIX _kernel

#else

#define MEMSUFFIX _user

#endif

#if DATA_SIZE == 8

#define RES_TYPE uint64_t

#else

#define RES_TYPE int

#endif

#if MEMUSER == 0

DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), _mmu)(unsigned long addr);

void REGPARM(2) glue(glue(__st, SUFFIX), _mmu)(unsigned long addr, DATA_TYPE v);

#endif

static inline int glue(glue(ldu, SUFFIX), MEMSUFFIX)(void *ptr)

{

    int index;

    RES_TYPE res;

    unsigned long addr, physaddr;

    addr = (unsigned long)ptr;

    index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);

    if (__builtin_expect(env->tlb_read[MEMUSER][index].address != 

                         (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {

        res = glue(glue(__ld, SUFFIX), _mmu)(addr);

    } else {

        physaddr = addr + env->tlb_read[MEMUSER][index].addend;

        res = glue(glue(ldu, SUFFIX), _raw)((uint8_t *)physaddr);

    }

    return res;

}

#if DATA_SIZE <= 2

static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(void *ptr)

{

    int res, index;

    unsigned long addr, physaddr;

    addr = (unsigned long)ptr;

    index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);

    if (__builtin_expect(env->tlb_read[MEMUSER][index].address != 

                         (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {

        res = (DATA_STYPE)glue(glue(__ld, SUFFIX), _mmu)(addr);

    } else {

        physaddr = addr + env->tlb_read[MEMUSER][index].addend;

        res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr);

    }

    return res;

}

#endif

static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v)

{

    int index;

    unsigned long addr, physaddr;

    addr = (unsigned long)ptr;

    index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);

    if (__builtin_expect(env->tlb_write[MEMUSER][index].address != 

                         (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {

        glue(glue(__st, SUFFIX), _mmu)(addr, v);

    } else {

        physaddr = addr + env->tlb_write[MEMUSER][index].addend;

        glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v);

    }

}

#undef RES_TYPE

#undef DATA_TYPE

#undef DATA_STYPE

#undef SUFFIX

#undef DATA_SIZE

#undef MEMSUFFIX