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uaccess_32.h
/* 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; \ case 8: \ __get_user_u64(x, ptr, retval); \ 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); #if defined(CONFIG_CPU_LITTLE_ENDIAN) #define __get_user_u64(x, addr, err) \ ({ \ __asm__ __volatile__( \ "1:\n\t" \ "mov.l %2,%R1\n\t" \ "mov.l %T2,%S1\n\t" \ "2:\n" \ ".section .fixup,\"ax\"\n" \ "3:\n\t" \ "mov #0,%R1\n\t" \ "mov #0,%S1\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" \ ".long 1b + 2, 3b\n\t" \ ".previous" \ :"=&r" (err), "=&r" (x) \ :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); }) #else #define __get_user_u64(x, addr, err) \ ({ \ __asm__ __volatile__( \ "1:\n\t" \ "mov.l %2,%S1\n\t" \ "mov.l %T2,%R1\n\t" \ "2:\n" \ ".section .fixup,\"ax\"\n" \ "3:\n\t" \ "mov #0,%S1\n\t" \ "mov #0,%R1\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" \ ".long 1b + 2, 3b\n\t" \ ".previous" \ :"=&r" (err), "=&r" (x) \ :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); }) #endif #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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