projects / people / arne_f / kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 02f7e627 | 2 | /* |
| 9b01bd9e PM |
3 | * User space memory access functions |
| 4 | * | |
| 5 | * Copyright (C) 1999, 2002 Niibe Yutaka | |
| 02f7e627 | 6 | * Copyright (C) 2003 - 2008 Paul Mundt |
| 9b01bd9e PM |
7 | * |
| 8 | * Based on: | |
| 9 | * MIPS implementation version 1.15 by | |
| 10 | * Copyright (C) 1996, 1997, 1998 by Ralf Baechle | |
| 11 | * and i386 version. | |
| 12 | */ | |
| 1e6760c5 MD |
13 | #ifndef __ASM_SH_UACCESS_32_H |
| 14 | #define __ASM_SH_UACCESS_32_H | |
| 9b01bd9e | 15 | |
| 9b01bd9e PM |
16 | #define __get_user_size(x,ptr,size,retval) \ |
| 17 | do { \ | |
| 18 | retval = 0; \ | |
| 9b01bd9e PM |
19 | switch (size) { \ |
| 20 | case 1: \ | |
| 21 | __get_user_asm(x, ptr, retval, "b"); \ | |
| 22 | break; \ | |
| 23 | case 2: \ | |
| 24 | __get_user_asm(x, ptr, retval, "w"); \ | |
| 25 | break; \ | |
| 26 | case 4: \ | |
| 27 | __get_user_asm(x, ptr, retval, "l"); \ | |
| 28 | break; \ | |
| 29 | default: \ | |
| 30 | __get_user_unknown(); \ | |
| 31 | break; \ | |
| 32 | } \ | |
| 33 | } while (0) | |
| 34 | ||
| 42fd3b14 | 35 | #ifdef CONFIG_MMU |
| 9b01bd9e PM |
36 | #define __get_user_asm(x, addr, err, insn) \ |
| 37 | ({ \ | |
| 38 | __asm__ __volatile__( \ | |
| 39 | "1:\n\t" \ | |
| 40 | "mov." insn " %2, %1\n\t" \ | |
| 9b01bd9e PM |
41 | "2:\n" \ |
| 42 | ".section .fixup,\"ax\"\n" \ | |
| 43 | "3:\n\t" \ | |
| 44 | "mov #0, %1\n\t" \ | |
| 45 | "mov.l 4f, %0\n\t" \ | |
| 46 | "jmp @%0\n\t" \ | |
| 0fb19dcb SM |
47 | " mov %3, %0\n\t" \ |
| 48 | ".balign 4\n" \ | |
| 9b01bd9e PM |
49 | "4: .long 2b\n\t" \ |
| 50 | ".previous\n" \ | |
| 51 | ".section __ex_table,\"a\"\n\t" \ | |
| 52 | ".long 1b, 3b\n\t" \ | |
| 53 | ".previous" \ | |
| 54 | :"=&r" (err), "=&r" (x) \ | |
| 0fb19dcb | 55 | :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); }) |
| 42fd3b14 PM |
56 | #else |
| 57 | #define __get_user_asm(x, addr, err, insn) \ | |
| 58 | do { \ | |
| 59 | __asm__ __volatile__ ( \ | |
| 60 | "mov." insn " %1, %0\n\t" \ | |
| 61 | : "=&r" (x) \ | |
| 62 | : "m" (__m(addr)) \ | |
| 63 | ); \ | |
| 64 | } while (0) | |
| 65 | #endif /* CONFIG_MMU */ | |
| 9b01bd9e PM |
66 | |
| 67 | extern void __get_user_unknown(void); | |
| 68 | ||
| 69 | #define __put_user_size(x,ptr,size,retval) \ | |
| 70 | do { \ | |
| 71 | retval = 0; \ | |
| 9b01bd9e PM |
72 | switch (size) { \ |
| 73 | case 1: \ | |
| 74 | __put_user_asm(x, ptr, retval, "b"); \ | |
| 75 | break; \ | |
| 76 | case 2: \ | |
| 77 | __put_user_asm(x, ptr, retval, "w"); \ | |
| 78 | break; \ | |
| 79 | case 4: \ | |
| 6de9c648 | 80 | __put_user_asm(x, ptr, retval, "l"); \ |
| 9b01bd9e PM |
81 | break; \ |
| 82 | case 8: \ | |
| 83 | __put_user_u64(x, ptr, retval); \ | |
| 84 | break; \ | |
| 85 | default: \ | |
| 86 | __put_user_unknown(); \ | |
| 87 | } \ | |
| 88 | } while (0) | |
| 89 | ||
| 42fd3b14 PM |
90 | #ifdef CONFIG_MMU |
| 91 | #define __put_user_asm(x, addr, err, insn) \ | |
| 92 | do { \ | |
| 93 | __asm__ __volatile__ ( \ | |
| 94 | "1:\n\t" \ | |
| 95 | "mov." insn " %1, %2\n\t" \ | |
| 96 | "2:\n" \ | |
| 97 | ".section .fixup,\"ax\"\n" \ | |
| 98 | "3:\n\t" \ | |
| 99 | "mov.l 4f, %0\n\t" \ | |
| 100 | "jmp @%0\n\t" \ | |
| 101 | " mov %3, %0\n\t" \ | |
| 102 | ".balign 4\n" \ | |
| 103 | "4: .long 2b\n\t" \ | |
| 104 | ".previous\n" \ | |
| 105 | ".section __ex_table,\"a\"\n\t" \ | |
| 106 | ".long 1b, 3b\n\t" \ | |
| 107 | ".previous" \ | |
| 108 | : "=&r" (err) \ | |
| 109 | : "r" (x), "m" (__m(addr)), "i" (-EFAULT), \ | |
| 110 | "0" (err) \ | |
| 111 | : "memory" \ | |
| 112 | ); \ | |
| 113 | } while (0) | |
| 114 | #else | |
| 115 | #define __put_user_asm(x, addr, err, insn) \ | |
| 116 | do { \ | |
| 117 | __asm__ __volatile__ ( \ | |
| 118 | "mov." insn " %0, %1\n\t" \ | |
| 119 | : /* no outputs */ \ | |
| 120 | : "r" (x), "m" (__m(addr)) \ | |
| 121 | : "memory" \ | |
| 122 | ); \ | |
| 123 | } while (0) | |
| 124 | #endif /* CONFIG_MMU */ | |
| 9b01bd9e | 125 | |
| 0fb19dcb | 126 | #if defined(CONFIG_CPU_LITTLE_ENDIAN) |
| 9b01bd9e PM |
127 | #define __put_user_u64(val,addr,retval) \ |
| 128 | ({ \ | |
| 129 | __asm__ __volatile__( \ | |
| 130 | "1:\n\t" \ | |
| 131 | "mov.l %R1,%2\n\t" \ | |
| 132 | "mov.l %S1,%T2\n\t" \ | |
| 9b01bd9e PM |
133 | "2:\n" \ |
| 134 | ".section .fixup,\"ax\"\n" \ | |
| 135 | "3:\n\t" \ | |
| 9b01bd9e PM |
136 | "mov.l 4f,%0\n\t" \ |
| 137 | "jmp @%0\n\t" \ | |
| 0fb19dcb SM |
138 | " mov %3,%0\n\t" \ |
| 139 | ".balign 4\n" \ | |
| 9b01bd9e PM |
140 | "4: .long 2b\n\t" \ |
| 141 | ".previous\n" \ | |
| 142 | ".section __ex_table,\"a\"\n\t" \ | |
| 143 | ".long 1b, 3b\n\t" \ | |
| 144 | ".previous" \ | |
| 145 | : "=r" (retval) \ | |
| 0fb19dcb | 146 | : "r" (val), "m" (__m(addr)), "i" (-EFAULT), "0" (retval) \ |
| 9b01bd9e PM |
147 | : "memory"); }) |
| 148 | #else | |
| 149 | #define __put_user_u64(val,addr,retval) \ | |
| 150 | ({ \ | |
| 151 | __asm__ __volatile__( \ | |
| 152 | "1:\n\t" \ | |
| 153 | "mov.l %S1,%2\n\t" \ | |
| 154 | "mov.l %R1,%T2\n\t" \ | |
| 9b01bd9e PM |
155 | "2:\n" \ |
| 156 | ".section .fixup,\"ax\"\n" \ | |
| 157 | "3:\n\t" \ | |
| 9b01bd9e PM |
158 | "mov.l 4f,%0\n\t" \ |
| 159 | "jmp @%0\n\t" \ | |
| 0fb19dcb SM |
160 | " mov %3,%0\n\t" \ |
| 161 | ".balign 4\n" \ | |
| 9b01bd9e PM |
162 | "4: .long 2b\n\t" \ |
| 163 | ".previous\n" \ | |
| 164 | ".section __ex_table,\"a\"\n\t" \ | |
| 165 | ".long 1b, 3b\n\t" \ | |
| 166 | ".previous" \ | |
| 167 | : "=r" (retval) \ | |
| 0fb19dcb | 168 | : "r" (val), "m" (__m(addr)), "i" (-EFAULT), "0" (retval) \ |
| 9b01bd9e PM |
169 | : "memory"); }) |
| 170 | #endif | |
| 171 | ||
| 172 | extern void __put_user_unknown(void); | |
| 173 | ||
| 1e6760c5 | 174 | #endif /* __ASM_SH_UACCESS_32_H */ |