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69 lines
2.1 KiB
69 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_UNALIGNED_GENERIC_H |
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#define _LINUX_UNALIGNED_GENERIC_H |
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/* |
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* Cause a link-time error if we try an unaligned access other than |
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* 1,2,4 or 8 bytes long |
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*/ |
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extern void __bad_unaligned_access_size(void); |
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#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \ |
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__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ |
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__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \ |
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__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \ |
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__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \ |
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__bad_unaligned_access_size())))); \ |
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})) |
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#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \ |
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__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ |
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__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \ |
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__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \ |
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__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \ |
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__bad_unaligned_access_size())))); \ |
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})) |
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#define __put_unaligned_le(val, ptr) ({ \ |
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void *__gu_p = (ptr); \ |
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switch (sizeof(*(ptr))) { \ |
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case 1: \ |
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*(u8 *)__gu_p = (__force u8)(val); \ |
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break; \ |
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case 2: \ |
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put_unaligned_le16((__force u16)(val), __gu_p); \ |
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break; \ |
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case 4: \ |
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put_unaligned_le32((__force u32)(val), __gu_p); \ |
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break; \ |
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case 8: \ |
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put_unaligned_le64((__force u64)(val), __gu_p); \ |
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break; \ |
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default: \ |
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__bad_unaligned_access_size(); \ |
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break; \ |
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} \ |
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(void)0; }) |
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#define __put_unaligned_be(val, ptr) ({ \ |
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void *__gu_p = (ptr); \ |
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switch (sizeof(*(ptr))) { \ |
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case 1: \ |
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*(u8 *)__gu_p = (__force u8)(val); \ |
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break; \ |
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case 2: \ |
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put_unaligned_be16((__force u16)(val), __gu_p); \ |
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break; \ |
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case 4: \ |
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put_unaligned_be32((__force u32)(val), __gu_p); \ |
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break; \ |
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case 8: \ |
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put_unaligned_be64((__force u64)(val), __gu_p); \ |
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break; \ |
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default: \ |
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__bad_unaligned_access_size(); \ |
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break; \ |
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} \ |
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(void)0; }) |
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#endif /* _LINUX_UNALIGNED_GENERIC_H */
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