cpu-all.h

/*
 * defines common to all virtual CPUs
 * 
 *  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
 */
#ifndef CPU_ALL_H
#define CPU_ALL_H

/* all CPU memory access use these macros */
static inline int ldub(void *ptr)
{
    return *(uint8_t *)ptr;
}

static inline int ldsb(void *ptr)
{
    return *(int8_t *)ptr;
}

static inline void stb(void *ptr, int v)
{
    *(uint8_t *)ptr = v;
}

/* NOTE: on arm, putting 2 in /proc/sys/debug/alignment so that the
   kernel handles unaligned load/stores may give better results, but
   it is a system wide setting : bad */
#if defined(WORDS_BIGENDIAN) || defined(__arm__)

/* conservative code for little endian unaligned accesses */
static inline int lduw(void *ptr)
{
#ifdef __powerpc__
    int val;
    __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (ptr));
    return val;
#else
    uint8_t *p = ptr;
    return p[0] | (p[1] << 8);
#endif
}

static inline int ldsw(void *ptr)
{
#ifdef __powerpc__
    int val;
    __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (ptr));
    return (int16_t)val;
#else
    uint8_t *p = ptr;
    return (int16_t)(p[0] | (p[1] << 8));
#endif
}

static inline int ldl(void *ptr)
{
#ifdef __powerpc__
    int val;
    __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (ptr));
    return val;
#else
    uint8_t *p = ptr;
    return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
#endif
}

static inline uint64_t ldq(void *ptr)
{
    uint8_t *p = ptr;
    uint32_t v1, v2;
    v1 = ldl(p);
    v2 = ldl(p + 4);
    return v1 | ((uint64_t)v2 << 32);
}

static inline void stw(void *ptr, int v)
{
#ifdef __powerpc__
    __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*(uint16_t *)ptr) : "r" (v), "r" (ptr));
#else
    uint8_t *p = ptr;
    p[0] = v;
    p[1] = v >> 8;
#endif
}

static inline void stl(void *ptr, int v)
{
#ifdef __powerpc__
    __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*(uint32_t *)ptr) : "r" (v), "r" (ptr));
#else
    uint8_t *p = ptr;
    p[0] = v;
    p[1] = v >> 8;
    p[2] = v >> 16;
    p[3] = v >> 24;
#endif
}

static inline void stq(void *ptr, uint64_t v)
{
    uint8_t *p = ptr;
    stl(p, (uint32_t)v);
    stl(p + 4, v >> 32);
}

/* float access */

static inline float ldfl(void *ptr)
{
    union {
        float f;
        uint32_t i;
    } u;
    u.i = ldl(ptr);
    return u.f;
}

static inline void stfl(void *ptr, float v)
{
    union {
        float f;
        uint32_t i;
    } u;
    u.f = v;
    stl(ptr, u.i);
}

#if defined(__arm__) && !defined(WORDS_BIGENDIAN)

/* NOTE: arm is horrible as double 32 bit words are stored in big endian ! */
static inline double ldfq(void *ptr)
{
    union {
        double d;
        uint32_t tab[2];
    } u;
    u.tab[1] = ldl(ptr);
    u.tab[0] = ldl(ptr + 4);
    return u.d;
}

static inline void stfq(void *ptr, double v)
{
    union {
        double d;
        uint32_t tab[2];
    } u;
    u.d = v;
    stl(ptr, u.tab[1]);
    stl(ptr + 4, u.tab[0]);
}

#else
static inline double ldfq(void *ptr)
{
    union {
        double d;
        uint64_t i;
    } u;
    u.i = ldq(ptr);
    return u.d;
}

static inline void stfq(void *ptr, double v)
{
    union {
        double d;
        uint64_t i;
    } u;
    u.d = v;
    stq(ptr, u.i);
}
#endif

#else

static inline int lduw(void *ptr)
{
    return *(uint16_t *)ptr;
}

static inline int ldsw(void *ptr)
{
    return *(int16_t *)ptr;
}

static inline int ldl(void *ptr)
{
    return *(uint32_t *)ptr;
}

static inline uint64_t ldq(void *ptr)
{
    return *(uint64_t *)ptr;
}

static inline void stw(void *ptr, int v)
{
    *(uint16_t *)ptr = v;
}

static inline void stl(void *ptr, int v)
{
    *(uint32_t *)ptr = v;
}

static inline void stq(void *ptr, uint64_t v)
{
    *(uint64_t *)ptr = v;
}

/* float access */

static inline float ldfl(void *ptr)
{
    return *(float *)ptr;
}

static inline double ldfq(void *ptr)
{
    return *(double *)ptr;
}

static inline void stfl(void *ptr, float v)
{
    *(float *)ptr = v;
}

static inline void stfq(void *ptr, double v)
{
    *(double *)ptr = v;
}
#endif

/* page related stuff */

#define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
#define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
#define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)

extern unsigned long real_host_page_size;
extern unsigned long host_page_bits;
extern unsigned long host_page_size;
extern unsigned long host_page_mask;

#define HOST_PAGE_ALIGN(addr) (((addr) + host_page_size - 1) & host_page_mask)

/* same as PROT_xxx */
#define PAGE_READ      0x0001
#define PAGE_WRITE     0x0002
#define PAGE_EXEC      0x0004
#define PAGE_BITS      (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
#define PAGE_VALID     0x0008
/* original state of the write flag (used when tracking self-modifying
   code */
#define PAGE_WRITE_ORG 0x0010 

void page_dump(FILE *f);
int page_get_flags(unsigned long address);
void page_set_flags(unsigned long start, unsigned long end, int flags);
void page_unprotect_range(uint8_t *data, unsigned long data_size);

#define SINGLE_CPU_DEFINES
#ifdef SINGLE_CPU_DEFINES

#if defined(TARGET_I386)

#define CPUState CPUX86State
#define cpu_init cpu_x86_init
#define cpu_exec cpu_x86_exec
#define cpu_gen_code cpu_x86_gen_code
#define cpu_interrupt cpu_x86_interrupt
#define cpu_signal_handler cpu_x86_signal_handler

#elif defined(TARGET_ARM)

#define CPUState CPUARMState
#define cpu_init cpu_arm_init
#define cpu_exec cpu_arm_exec
#define cpu_gen_code cpu_arm_gen_code
#define cpu_interrupt cpu_arm_interrupt
#define cpu_signal_handler cpu_arm_signal_handler

#else

#error unsupported target CPU

#endif

#endif

#endif /* CPU_ALL_H */