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 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 == 0

#define CPU_MEM_INDEX 0

#define MMUSUFFIX _mmu

#elif ACCESS_TYPE == 1

#define CPU_MEM_INDEX 1

#define MMUSUFFIX _mmu

#elif ACCESS_TYPE == 2

#ifdef TARGET_I386

#define CPU_MEM_INDEX ((env->hflags & HF_CPL_MASK) == 3)

#elif defined (TARGET_PPC)

#define CPU_MEM_INDEX (msr_pr)

#elif defined (TARGET_MIPS)

#define CPU_MEM_INDEX ((env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM)

#elif defined (TARGET_SPARC)

#define CPU_MEM_INDEX ((env->psrs) == 0)

#elif defined (TARGET_ARM)

#define CPU_MEM_INDEX ((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_USR)

#elif defined (TARGET_SH4)

#define CPU_MEM_INDEX ((env->sr & SR_MD) == 0)

#else

#error unsupported CPU

#endif

#define MMUSUFFIX _mmu

#elif ACCESS_TYPE == 3

#ifdef TARGET_I386

#define CPU_MEM_INDEX ((env->hflags & HF_CPL_MASK) == 3)

#elif defined (TARGET_PPC)

#define CPU_MEM_INDEX (msr_pr)

#elif defined (TARGET_MIPS)

#define CPU_MEM_INDEX ((env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM)

#elif defined (TARGET_SPARC)

#define CPU_MEM_INDEX ((env->psrs) == 0)

#elif defined (TARGET_ARM)

#define CPU_MEM_INDEX ((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_USR)

#elif defined (TARGET_SH4)

#define CPU_MEM_INDEX ((env->sr & SR_MD) == 0)

#else

#error unsupported CPU

#endif

#define MMUSUFFIX _cmmu

#else

#error invalid ACCESS_TYPE

#endif

#if DATA_SIZE == 8

#define RES_TYPE uint64_t

#else

#define RES_TYPE int

#endif

#if ACCESS_TYPE == 3

#define ADDR_READ addr_code

#else

#define ADDR_READ addr_read

#endif

DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(target_ulong addr,

                                                         int is_user);

void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(target_ulong addr, DATA_TYPE v, int is_user);

#if (DATA_SIZE <= 4) && (TARGET_LONG_BITS == 32) && defined(__i386__) && \

    (ACCESS_TYPE <= 1) && defined(ASM_SOFTMMU)

#define CPU_TLB_ENTRY_BITS 4

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

{

    int res;

    asm volatile ("movl %1, %%edx\n"

                  "movl %1, %%eax\n"

                  "shrl %3, %%edx\n"

                  "andl %4, %%eax\n"

                  "andl %2, %%edx\n"

                  "leal %5(%%edx, %%ebp), %%edx\n"

                  "cmpl (%%edx), %%eax\n"

                  "movl %1, %%eax\n"

                  "je 1f\n"

                  "pushl %6\n"

                  "call %7\n"

                  "popl %%edx\n"

                  "movl %%eax, %0\n"

                  "jmp 2f\n"

                  "1:\n"

                  "addl 12(%%edx), %%eax\n"

#if DATA_SIZE == 1

                  "movzbl (%%eax), %0\n"

#elif DATA_SIZE == 2

                  "movzwl (%%eax), %0\n"

#elif DATA_SIZE == 4

                  "movl (%%eax), %0\n"

#else

#error unsupported size

#endif

                  "2:\n"

                  : "=r" (res)

                  : "r" (ptr), 

                  "i" ((CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS), 

                  "i" (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS), 

                  "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),

                  "m" (*(uint32_t *)offsetof(CPUState, tlb_table[CPU_MEM_INDEX][0].addr_read)),

                  "i" (CPU_MEM_INDEX),

                  "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX))

                  : "%eax", "%ecx", "%edx", "memory", "cc");

    return res;

}

#if DATA_SIZE <= 2

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

{

    int res;

    asm volatile ("movl %1, %%edx\n"

                  "movl %1, %%eax\n"

                  "shrl %3, %%edx\n"

                  "andl %4, %%eax\n"

                  "andl %2, %%edx\n"

                  "leal %5(%%edx, %%ebp), %%edx\n"

                  "cmpl (%%edx), %%eax\n"

                  "movl %1, %%eax\n"

                  "je 1f\n"

                  "pushl %6\n"

                  "call %7\n"

                  "popl %%edx\n"

#if DATA_SIZE == 1

                  "movsbl %%al, %0\n"

#elif DATA_SIZE == 2

                  "movswl %%ax, %0\n"

#else

#error unsupported size

#endif

                  "jmp 2f\n"

                  "1:\n"

                  "addl 12(%%edx), %%eax\n"

#if DATA_SIZE == 1

                  "movsbl (%%eax), %0\n"

#elif DATA_SIZE == 2

                  "movswl (%%eax), %0\n"

#else

#error unsupported size

#endif

                  "2:\n"

                  : "=r" (res)

                  : "r" (ptr), 

                  "i" ((CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS), 

                  "i" (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS), 

                  "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),

                  "m" (*(uint32_t *)offsetof(CPUState, tlb_table[CPU_MEM_INDEX][0].addr_read)),

                  "i" (CPU_MEM_INDEX),

                  "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX))

                  : "%eax", "%ecx", "%edx", "memory", "cc");

    return res;

}

#endif

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

{

    asm volatile ("movl %0, %%edx\n"

                  "movl %0, %%eax\n"

                  "shrl %3, %%edx\n"

                  "andl %4, %%eax\n"

                  "andl %2, %%edx\n"

                  "leal %5(%%edx, %%ebp), %%edx\n"

                  "cmpl (%%edx), %%eax\n"

                  "movl %0, %%eax\n"

                  "je 1f\n"

#if DATA_SIZE == 1

                  "movzbl %b1, %%edx\n"

#elif DATA_SIZE == 2

                  "movzwl %w1, %%edx\n"

#elif DATA_SIZE == 4

                  "movl %1, %%edx\n"

#else

#error unsupported size

#endif

                  "pushl %6\n"

                  "call %7\n"

                  "popl %%eax\n"

                  "jmp 2f\n"

                  "1:\n"

                  "addl 8(%%edx), %%eax\n"

#if DATA_SIZE == 1

                  "movb %b1, (%%eax)\n"

#elif DATA_SIZE == 2

                  "movw %w1, (%%eax)\n"

#elif DATA_SIZE == 4

                  "movl %1, (%%eax)\n"

#else

#error unsupported size

#endif

                  "2:\n"

                  : 

                  : "r" (ptr), 

/* NOTE: 'q' would be needed as constraint, but we could not use it

   with T1 ! */

                  "r" (v), 

                  "i" ((CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS), 

                  "i" (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS), 

                  "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),

                  "m" (*(uint32_t *)offsetof(CPUState, tlb_table[CPU_MEM_INDEX][0].addr_write)),

                  "i" (CPU_MEM_INDEX),

                  "m" (*(uint8_t *)&glue(glue(__st, SUFFIX), MMUSUFFIX))

                  : "%eax", "%ecx", "%edx", "memory", "cc");

}

#else

/* generic load/store macros */

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

{

    int index;

    RES_TYPE res;

    target_ulong addr;

    unsigned long physaddr;

    int is_user;

    addr = ptr;

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

    is_user = CPU_MEM_INDEX;

    if (__builtin_expect(env->tlb_table[is_user][index].ADDR_READ != 

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

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

    } else {

        physaddr = addr + env->tlb_table[is_user][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, index;

    target_ulong addr;

    unsigned long physaddr;

    int is_user;

    addr = ptr;

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

    is_user = CPU_MEM_INDEX;

    if (__builtin_expect(env->tlb_table[is_user][index].ADDR_READ != 

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

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

    } else {

        physaddr = addr + env->tlb_table[is_user][index].addend;

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

    }

    return res;

}

#endif

#if ACCESS_TYPE != 3

/* generic store macro */

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

{

    int index;

    target_ulong addr;

    unsigned long physaddr;

    int is_user;

    addr = ptr;

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

    is_user = CPU_MEM_INDEX;

    if (__builtin_expect(env->tlb_table[is_user][index].addr_write != 

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

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

    } else {

        physaddr = addr + env->tlb_table[is_user][index].addend;

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

    }

}

#endif /* ACCESS_TYPE != 3 */

#endif /* !asm */

#if ACCESS_TYPE != 3

#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 != 3 */

#undef RES_TYPE

#undef DATA_TYPE

#undef DATA_STYPE

#undef SUFFIX

#undef USUFFIX

#undef DATA_SIZE

#undef CPU_MEM_INDEX

#undef MMUSUFFIX

#undef ADDR_READ