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/* SPDX-License-Identifier: GPL-2.0 */
/*
* 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 */
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