diff options
| author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2010-08-29 18:33:45 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2010-08-30 14:36:08 +0200 |
| commit | 37d6cbca5f3045b0423b40c9af9d7f78701449be (patch) | |
| tree | 9d4c2757c9023a6737fd3e848c9935354715c64b /include/linux/unaligned/generic.h | |
| parent | 5baf5ae9bdc5538e44805e520068badf6f546958 (diff) | |
| download | barebox-37d6cbca5f3045b0423b40c9af9d7f78701449be.tar.gz barebox-37d6cbca5f3045b0423b40c9af9d7f78701449be.tar.xz | |
move include/unaligned to include/linux/unaligned/
as originally in linux
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/linux/unaligned/generic.h')
| -rw-r--r-- | include/linux/unaligned/generic.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/linux/unaligned/generic.h b/include/linux/unaligned/generic.h new file mode 100644 index 0000000000..02d97ff3df --- /dev/null +++ b/include/linux/unaligned/generic.h @@ -0,0 +1,68 @@ +#ifndef _LINUX_UNALIGNED_GENERIC_H +#define _LINUX_UNALIGNED_GENERIC_H + +/* + * Cause a link-time error if we try an unaligned access other than + * 1,2,4 or 8 bytes long + */ +extern void __bad_unaligned_access_size(void); + +#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \ + __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ + __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \ + __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \ + __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \ + __bad_unaligned_access_size())))); \ + })) + +#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \ + __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ + __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \ + __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \ + __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \ + __bad_unaligned_access_size())))); \ + })) + +#define __put_unaligned_le(val, ptr) ({ \ + void *__gu_p = (ptr); \ + switch (sizeof(*(ptr))) { \ + case 1: \ + *(u8 *)__gu_p = (__force u8)(val); \ + break; \ + case 2: \ + put_unaligned_le16((__force u16)(val), __gu_p); \ + break; \ + case 4: \ + put_unaligned_le32((__force u32)(val), __gu_p); \ + break; \ + case 8: \ + put_unaligned_le64((__force u64)(val), __gu_p); \ + break; \ + default: \ + __bad_unaligned_access_size(); \ + break; \ + } \ + (void)0; }) + +#define __put_unaligned_be(val, ptr) ({ \ + void *__gu_p = (ptr); \ + switch (sizeof(*(ptr))) { \ + case 1: \ + *(u8 *)__gu_p = (__force u8)(val); \ + break; \ + case 2: \ + put_unaligned_be16((__force u16)(val), __gu_p); \ + break; \ + case 4: \ + put_unaligned_be32((__force u32)(val), __gu_p); \ + break; \ + case 8: \ + put_unaligned_be64((__force u64)(val), __gu_p); \ + break; \ + default: \ + __bad_unaligned_access_size(); \ + break; \ + } \ + (void)0; }) + +#endif /* _LINUX_UNALIGNED_GENERIC_H */ |