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/*
* 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)
#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)
#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
DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
int is_user);
void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(unsigned long addr, DATA_TYPE v, int is_user);
#if (DATA_SIZE <= 4) && defined(__i386__) && (ACCESS_TYPE <= 1) && defined(ASM_SOFTMMU)
static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(void *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 4(%%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) << 3),
"i" (TARGET_PAGE_BITS - 3),
"i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
"m" (*(uint32_t *)offsetof(CPUState, tlb_read[CPU_MEM_INDEX][0].address)),
"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)(void *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 4(%%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) << 3),
"i" (TARGET_PAGE_BITS - 3),
"i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
"m" (*(uint32_t *)offsetof(CPUState, tlb_read[CPU_MEM_INDEX][0].address)),
"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)(void *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 4(%%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) << 3),
"i" (TARGET_PAGE_BITS - 3),
"i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
"m" (*(uint32_t *)offsetof(CPUState, tlb_write[CPU_MEM_INDEX][0].address)),
"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)(void *ptr)
{
int index;
RES_TYPE res;
unsigned long addr, physaddr;
int is_user;
addr = (unsigned long)ptr;
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
is_user = CPU_MEM_INDEX;
if (__builtin_expect(env->tlb_read[is_user][index].address !=
(addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
res = glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, is_user);
} else {
physaddr = addr + env->tlb_read[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)(void *ptr)
{
int res, index;
unsigned long addr, physaddr;
int is_user;
addr = (unsigned long)ptr;
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
is_user = CPU_MEM_INDEX;
if (__builtin_expect(env->tlb_read[is_user][index].address !=
(addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
res = (DATA_STYPE)glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, is_user);
} else {
physaddr = addr + env->tlb_read[is_user][index].addend;
res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr);
}
return res;
}
#endif
/* generic store macro */
static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v)
{
int index;
unsigned long addr, physaddr;
int is_user;
addr = (unsigned long)ptr;
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
is_user = CPU_MEM_INDEX;
if (__builtin_expect(env->tlb_write[is_user][index].address !=
(addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
glue(glue(__st, SUFFIX), MMUSUFFIX)(addr, v, is_user);
} else {
physaddr = addr + env->tlb_write[is_user][index].addend;
glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v);
}
}
#endif
#if DATA_SIZE == 8
static inline double glue(ldfq, MEMSUFFIX)(void *ptr)
{
union {
double d;
uint64_t i;
} u;
u.i = glue(ldq, MEMSUFFIX)(ptr);
return u.d;
}
static inline void glue(stfq, MEMSUFFIX)(void *ptr, double v)
{
union {
double d;
uint64_t i;
} u;
u.d = v;
glue(stq, MEMSUFFIX)(ptr, u.i);
}
#endif /* DATA_SIZE == 8 */
#if DATA_SIZE == 4
static inline float glue(ldfl, MEMSUFFIX)(void *ptr)
{
union {
float f;
uint32_t i;
} u;
u.i = glue(ldl, MEMSUFFIX)(ptr);
return u.f;
}
static inline void glue(stfl, MEMSUFFIX)(void *ptr, float v)
{
union {
float f;
uint32_t i;
} u;
u.f = v;
glue(stl, MEMSUFFIX)(ptr, u.i);
}
#endif /* DATA_SIZE == 4 */
#undef RES_TYPE
#undef DATA_TYPE
#undef DATA_STYPE
#undef SUFFIX
#undef USUFFIX
#undef DATA_SIZE
#undef CPU_MEM_INDEX
#undef MMUSUFFIX
|
