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authorWolfgang Denk <wd@denx.de>2009-03-21 22:15:49 +0100
committerWolfgang Denk <wd@denx.de>2009-03-21 22:15:49 +0100
commitee1702d75a30d076139d1841383a1fa7220a0e11 (patch)
treeb008c231b7d5e4e52ac49aec9a49bc73413aaf30 /include/linux/unaligned
parente60beb13cf0135dc71c541021487b5ccc4d269cb (diff)
parentfaac4fd852e39cb1d7a740801b060e41aeacef1f (diff)
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Merge branch 'next' of ../next
Diffstat (limited to 'include/linux/unaligned')
-rw-r--r--include/linux/unaligned/access_ok.h66
-rw-r--r--include/linux/unaligned/generic.h71
2 files changed, 137 insertions, 0 deletions
diff --git a/include/linux/unaligned/access_ok.h b/include/linux/unaligned/access_ok.h
new file mode 100644
index 0000000..5f46eee
--- /dev/null
+++ b/include/linux/unaligned/access_ok.h
@@ -0,0 +1,66 @@
+#ifndef _LINUX_UNALIGNED_ACCESS_OK_H
+#define _LINUX_UNALIGNED_ACCESS_OK_H
+
+#include <asm/byteorder.h>
+
+static inline u16 get_unaligned_le16(const void *p)
+{
+ return le16_to_cpup((__le16 *)p);
+}
+
+static inline u32 get_unaligned_le32(const void *p)
+{
+ return le32_to_cpup((__le32 *)p);
+}
+
+static inline u64 get_unaligned_le64(const void *p)
+{
+ return le64_to_cpup((__le64 *)p);
+}
+
+static inline u16 get_unaligned_be16(const void *p)
+{
+ return be16_to_cpup((__be16 *)p);
+}
+
+static inline u32 get_unaligned_be32(const void *p)
+{
+ return be32_to_cpup((__be32 *)p);
+}
+
+static inline u64 get_unaligned_be64(const void *p)
+{
+ return be64_to_cpup((__be64 *)p);
+}
+
+static inline void put_unaligned_le16(u16 val, void *p)
+{
+ *((__le16 *)p) = cpu_to_le16(val);
+}
+
+static inline void put_unaligned_le32(u32 val, void *p)
+{
+ *((__le32 *)p) = cpu_to_le32(val);
+}
+
+static inline void put_unaligned_le64(u64 val, void *p)
+{
+ *((__le64 *)p) = cpu_to_le64(val);
+}
+
+static inline void put_unaligned_be16(u16 val, void *p)
+{
+ *((__be16 *)p) = cpu_to_be16(val);
+}
+
+static inline void put_unaligned_be32(u32 val, void *p)
+{
+ *((__be32 *)p) = cpu_to_be32(val);
+}
+
+static inline void put_unaligned_be64(u64 val, void *p)
+{
+ *((__be64 *)p) = cpu_to_be64(val);
+}
+
+#endif /* _LINUX_UNALIGNED_ACCESS_OK_H */
diff --git a/include/linux/unaligned/generic.h b/include/linux/unaligned/generic.h
new file mode 100644
index 0000000..cc688e1
--- /dev/null
+++ b/include/linux/unaligned/generic.h
@@ -0,0 +1,71 @@
+#ifndef _LINUX_UNALIGNED_GENERIC_H
+#define _LINUX_UNALIGNED_GENERIC_H
+
+/* define __force to nothing in U-Boot */
+#define __force
+
+/*
+ * 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 */