Dear Mike Dunn,
This patch adds the bitrev library from the linux kernel. This is a simple algorithm that uses an 8 bit look-up table to reverse the bits in data types of 8, 16, or 32 bit widths. The docg4 nand flash driver uses it.
Signed-off-by: Mike Dunn mikedunn@newsguy.com
include/linux/bitrev.h | 16 +++++++++++++ lib/Makefile | 1 + lib/bitrev.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 73 insertions(+), 0 deletions(-) create mode 100644 include/linux/bitrev.h create mode 100644 lib/bitrev.c
diff --git a/include/linux/bitrev.h b/include/linux/bitrev.h new file mode 100644 index 0000000..7ffe03f --- /dev/null +++ b/include/linux/bitrev.h @@ -0,0 +1,16 @@ +#ifndef _LINUX_BITREV_H +#define _LINUX_BITREV_H
+#include <linux/types.h>
+extern u8 const byte_rev_table[256];
+static inline u8 bitrev8(u8 byte) +{
- return byte_rev_table[byte];
+}
+extern u16 bitrev16(u16 in); +extern u32 bitrev32(u32 in);
Do we really need to expose the array and use so many externs here?
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