projects / thirdparty / kernel / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 064106a9 HH |
2 | #ifndef _LINUX_UNALIGNED_GENERIC_H |
| 3 | #define _LINUX_UNALIGNED_GENERIC_H | |
| 4 | ||
| 5 | /* | |
| 6 | * Cause a link-time error if we try an unaligned access other than | |
| 7 | * 1,2,4 or 8 bytes long | |
| 8 | */ | |
| 9 | extern void __bad_unaligned_access_size(void); | |
| 10 | ||
| 11 | #define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \ | |
| 12 | __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ | |
| 13 | __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \ | |
| 14 | __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \ | |
| 15 | __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \ | |
| 16 | __bad_unaligned_access_size())))); \ | |
| 17 | })) | |
| 18 | ||
| 19 | #define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \ | |
| 20 | __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ | |
| 21 | __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \ | |
| 22 | __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \ | |
| 23 | __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \ | |
| 24 | __bad_unaligned_access_size())))); \ | |
| 25 | })) | |
| 26 | ||
| 27 | #define __put_unaligned_le(val, ptr) ({ \ | |
| 28 | void *__gu_p = (ptr); \ | |
| 29 | switch (sizeof(*(ptr))) { \ | |
| 30 | case 1: \ | |
| 31 | *(u8 *)__gu_p = (__force u8)(val); \ | |
| 32 | break; \ | |
| 33 | case 2: \ | |
| 34 | put_unaligned_le16((__force u16)(val), __gu_p); \ | |
| 35 | break; \ | |
| 36 | case 4: \ | |
| 37 | put_unaligned_le32((__force u32)(val), __gu_p); \ | |
| 38 | break; \ | |
| 39 | case 8: \ | |
| 40 | put_unaligned_le64((__force u64)(val), __gu_p); \ | |
| 41 | break; \ | |
| 42 | default: \ | |
| 43 | __bad_unaligned_access_size(); \ | |
| 44 | break; \ | |
| 45 | } \ | |
| 46 | (void)0; }) | |
| 47 | ||
| 48 | #define __put_unaligned_be(val, ptr) ({ \ | |
| 49 | void *__gu_p = (ptr); \ | |
| 50 | switch (sizeof(*(ptr))) { \ | |
| 51 | case 1: \ | |
| 52 | *(u8 *)__gu_p = (__force u8)(val); \ | |
| 53 | break; \ | |
| 54 | case 2: \ | |
| 55 | put_unaligned_be16((__force u16)(val), __gu_p); \ | |
| 56 | break; \ | |
| 57 | case 4: \ | |
| 58 | put_unaligned_be32((__force u32)(val), __gu_p); \ | |
| 59 | break; \ | |
| 60 | case 8: \ | |
| 61 | put_unaligned_be64((__force u64)(val), __gu_p); \ | |
| 62 | break; \ | |
| 63 | default: \ | |
| 64 | __bad_unaligned_access_size(); \ | |
| 65 | break; \ | |
| 66 | } \ | |
| 67 | (void)0; }) | |
| 68 | ||
| 69 | #endif /* _LINUX_UNALIGNED_GENERIC_H */ |