uaccess_32.h

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/*
 * User space memory access functions
 *
 * Copyright (C) 1999, 2002  Niibe Yutaka
 * Copyright (C) 2003 - 2008  Paul Mundt
 *
 *  Based on:
 *     MIPS implementation version 1.15 by
 *              Copyright (C) 1996, 1997, 1998 by Ralf Baechle
 *     and i386 version.
 */
#ifndef __ASM_SH_UACCESS_32_H
#define __ASM_SH_UACCESS_32_H

#define __get_user_size(x,ptr,size,retval)          \
do {                                \
    retval = 0;                     \
    switch (size) {                     \
    case 1:                         \
        __get_user_asm(x, ptr, retval, "b");        \
        break;                      \
    case 2:                         \
        __get_user_asm(x, ptr, retval, "w");        \
        break;                      \
    case 4:                         \
        __get_user_asm(x, ptr, retval, "l");        \
        break;                      \
    default:                        \
        __get_user_unknown();               \
        break;                      \
    }                           \
} while (0)

#ifdef CONFIG_MMU
#define __get_user_asm(x, addr, err, insn) \
({ \
__asm__ __volatile__( \
    "1:\n\t" \
    "mov." insn "   %2, %1\n\t" \
    "2:\n" \
    ".section   .fixup,\"ax\"\n" \
    "3:\n\t" \
    "mov    #0, %1\n\t" \
    "mov.l  4f, %0\n\t" \
    "jmp    @%0\n\t" \
    " mov   %3, %0\n\t" \
    ".balign    4\n" \
    "4: .long   2b\n\t" \
    ".previous\n" \
    ".section   __ex_table,\"a\"\n\t" \
    ".long  1b, 3b\n\t" \
    ".previous" \
    :"=&r" (err), "=&r" (x) \
    :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); })
#else
#define __get_user_asm(x, addr, err, insn)      \
do {                            \
    __asm__ __volatile__ (              \
        "mov." insn "   %1, %0\n\t"     \
        : "=&r" (x)             \
        : "m" (__m(addr))           \
    );                      \
} while (0)
#endif /* CONFIG_MMU */

extern void __get_user_unknown(void);

#define __put_user_size(x,ptr,size,retval)      \
do {                            \
    retval = 0;                 \
    switch (size) {                 \
    case 1:                     \
        __put_user_asm(x, ptr, retval, "b");    \
        break;                  \
    case 2:                     \
        __put_user_asm(x, ptr, retval, "w");    \
        break;                  \
    case 4:                     \
        __put_user_asm(x, ptr, retval, "l");    \
        break;                  \
    case 8:                     \
        __put_user_u64(x, ptr, retval);     \
        break;                  \
    default:                    \
        __put_user_unknown();           \
    }                       \
} while (0)

#ifdef CONFIG_MMU
#define __put_user_asm(x, addr, err, insn)          \
do {                                \
    __asm__ __volatile__ (                  \
        "1:\n\t"                    \
        "mov." insn "   %1, %2\n\t"         \
        "2:\n"                      \
        ".section   .fixup,\"ax\"\n"        \
        "3:\n\t"                    \
        "mov.l  4f, %0\n\t"             \
        "jmp    @%0\n\t"                \
        " mov   %3, %0\n\t"             \
        ".balign    4\n"                \
        "4: .long   2b\n\t"             \
        ".previous\n"                   \
        ".section   __ex_table,\"a\"\n\t"       \
        ".long  1b, 3b\n\t"             \
        ".previous"                 \
        : "=&r" (err)                   \
        : "r" (x), "m" (__m(addr)), "i" (-EFAULT),  \
          "0" (err)                 \
        : "memory"                  \
    );                          \
} while (0)
#else
#define __put_user_asm(x, addr, err, insn)      \
do {                            \
    __asm__ __volatile__ (              \
        "mov." insn "   %0, %1\n\t"     \
        : /* no outputs */          \
        : "r" (x), "m" (__m(addr))      \
        : "memory"              \
    );                      \
} while (0)
#endif /* CONFIG_MMU */

#if defined(CONFIG_CPU_LITTLE_ENDIAN)
#define __put_user_u64(val,addr,retval) \
({ \
__asm__ __volatile__( \
    "1:\n\t" \
    "mov.l  %R1,%2\n\t" \
    "mov.l  %S1,%T2\n\t" \
    "2:\n" \
    ".section   .fixup,\"ax\"\n" \
    "3:\n\t" \
    "mov.l  4f,%0\n\t" \
    "jmp    @%0\n\t" \
    " mov   %3,%0\n\t" \
    ".balign    4\n" \
    "4: .long   2b\n\t" \
    ".previous\n" \
    ".section   __ex_table,\"a\"\n\t" \
    ".long  1b, 3b\n\t" \
    ".previous" \
    : "=r" (retval) \
    : "r" (val), "m" (__m(addr)), "i" (-EFAULT), "0" (retval) \
        : "memory"); })
#else
#define __put_user_u64(val,addr,retval) \
({ \
__asm__ __volatile__( \
    "1:\n\t" \
    "mov.l  %S1,%2\n\t" \
    "mov.l  %R1,%T2\n\t" \
    "2:\n" \
    ".section   .fixup,\"ax\"\n" \
    "3:\n\t" \
    "mov.l  4f,%0\n\t" \
    "jmp    @%0\n\t" \
    " mov   %3,%0\n\t" \
    ".balign    4\n" \
    "4: .long   2b\n\t" \
    ".previous\n" \
    ".section   __ex_table,\"a\"\n\t" \
    ".long  1b, 3b\n\t" \
    ".previous" \
    : "=r" (retval) \
    : "r" (val), "m" (__m(addr)), "i" (-EFAULT), "0" (retval) \
        : "memory"); })
#endif

extern void __put_user_unknown(void);

#endif /* __ASM_SH_UACCESS_32_H */