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, see <http://www.gnu.org/licenses/>.

 */

#if DATA_SIZE == 8

#define SUFFIX q

#define USUFFIX q

#define DATA_TYPE uint64_t

#elif DATA_SIZE == 4

#define SUFFIX l

#define USUFFIX l

#define DATA_TYPE uint32_t

#elif DATA_SIZE == 2

#define SUFFIX w

#define USUFFIX uw

#define DATA_TYPE uint16_t

#define DATA_STYPE int16_t

#elif DATA_SIZE == 1

#define SUFFIX b

#define USUFFIX ub

#define DATA_TYPE uint8_t

#define DATA_STYPE int8_t

#else

#error unsupported data size

#endif

#if ACCESS_TYPE < (NB_MMU_MODES)

#define CPU_MMU_INDEX ACCESS_TYPE

#define MMUSUFFIX _mmu

#elif ACCESS_TYPE == (NB_MMU_MODES)

#define CPU_MMU_INDEX (cpu_mmu_index(env))

#define MMUSUFFIX _mmu

#elif ACCESS_TYPE == (NB_MMU_MODES + 1)

#define CPU_MMU_INDEX (cpu_mmu_index(env))

#define MMUSUFFIX _cmmu

#else

#error invalid ACCESS_TYPE

#endif

#if DATA_SIZE == 8

#define RES_TYPE uint64_t

#else

#define RES_TYPE uint32_t

#endif

#if ACCESS_TYPE == (NB_MMU_MODES + 1)

#define ADDR_READ addr_code

#else

#define ADDR_READ addr_read

#endif

/* generic load/store macros */

static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(target_ulong ptr)

{

    int page_index;

    RES_TYPE res;

    target_ulong addr;

    unsigned long physaddr;

    int mmu_idx;

    addr = ptr;

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

    mmu_idx = CPU_MMU_INDEX;

    if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=

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

        res = glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, mmu_idx);

    } else {

        physaddr = addr + env->tlb_table[mmu_idx][page_index].addend;

        res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);

    }

    return res;

}

#if DATA_SIZE <= 2

static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(target_ulong ptr)

{

    int res, page_index;

    target_ulong addr;

    unsigned long physaddr;

    int mmu_idx;

    addr = ptr;

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

    mmu_idx = CPU_MMU_INDEX;

    if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=

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

        res = (DATA_STYPE)glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, mmu_idx);

    } else {

        physaddr = addr + env->tlb_table[mmu_idx][page_index].addend;

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

    }

    return res;

}

#endif

#if ACCESS_TYPE != (NB_MMU_MODES + 1)

/* generic store macro */

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

{

    int page_index;

    target_ulong addr;

    unsigned long physaddr;

    int mmu_idx;

    addr = ptr;

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

    mmu_idx = CPU_MMU_INDEX;

    if (unlikely(env->tlb_table[mmu_idx][page_index].addr_write !=

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

        glue(glue(__st, SUFFIX), MMUSUFFIX)(addr, v, mmu_idx);

    } else {

        physaddr = addr + env->tlb_table[mmu_idx][page_index].addend;

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

    }

}

#endif /* ACCESS_TYPE != (NB_MMU_MODES + 1) */

#if ACCESS_TYPE != (NB_MMU_MODES + 1)

#if DATA_SIZE == 8

static inline float64 glue(ldfq, MEMSUFFIX)(target_ulong ptr)

{

    union {

        float64 d;

        uint64_t i;

    } u;

    u.i = glue(ldq, MEMSUFFIX)(ptr);

    return u.d;

}

static inline void glue(stfq, MEMSUFFIX)(target_ulong ptr, float64 v)

{

    union {

        float64 d;

        uint64_t i;

    } u;

    u.d = v;

    glue(stq, MEMSUFFIX)(ptr, u.i);

}

#endif /* DATA_SIZE == 8 */

#if DATA_SIZE == 4

static inline float32 glue(ldfl, MEMSUFFIX)(target_ulong ptr)

{

    union {

        float32 f;

        uint32_t i;

    } u;

    u.i = glue(ldl, MEMSUFFIX)(ptr);

    return u.f;

}

static inline void glue(stfl, MEMSUFFIX)(target_ulong ptr, float32 v)

{

    union {

        float32 f;

        uint32_t i;

    } u;

    u.f = v;

    glue(stl, MEMSUFFIX)(ptr, u.i);

}

#endif /* DATA_SIZE == 4 */

#endif /* ACCESS_TYPE != (NB_MMU_MODES + 1) */

#undef RES_TYPE

#undef DATA_TYPE

#undef DATA_STYPE

#undef SUFFIX

#undef USUFFIX

#undef DATA_SIZE

#undef CPU_MMU_INDEX

#undef MMUSUFFIX

#undef ADDR_READ