ColdFire: Update the bitops for ColdFire platform
This patch uses the general ffs definition to replace the
platform ffs definition.
This patch also fixes the build error by adding hweightN
definition for m5329evb and m5373evb.
Signed-off-by: Jason Jin <Jason.jin@freescale.com>
Signed-off-by: Alison Wang <b18965@freescale.com>
diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h
index ad971b4..525d90c 100644
--- a/arch/m68k/include/asm/bitops.h
+++ b/arch/m68k/include/asm/bitops.h
@@ -17,41 +17,36 @@
#ifdef __KERNEL__
-/*
- * ffs: find first bit set. This is defined the same way as
- * the libc and compiler builtin ffs routines, therefore
- * differs in spirit from the above ffz (man ffs).
- */
-extern __inline__ int ffs(int x)
-{
- int r = 1;
- if (!x)
- return 0;
- if (!(x & 0xffff)) {
- x >>= 16;
- r += 16;
- }
- if (!(x & 0xff)) {
- x >>= 8;
- r += 8;
- }
- if (!(x & 0xf)) {
- x >>= 4;
- r += 4;
- }
- if (!(x & 3)) {
- x >>= 2;
- r += 2;
- }
- if (!(x & 1)) {
- x >>= 1;
- r += 1;
- }
- return r;
+extern inline int test_bit(int nr, __const__ volatile void *addr)
+{
+ __const__ unsigned int *p = (__const__ unsigned int *) addr;
+
+ return (p[nr >> 5] & (1UL << (nr & 31))) != 0;
}
+
+extern inline int test_and_set_bit(int nr, volatile void *vaddr)
+{
+ char retval;
+
+ volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
+ __asm__ __volatile__ ("bset %2,(%4); sne %0"
+ : "=d" (retval), "=m" (*p)
+ : "di" (nr & 7), "m" (*p), "a" (p));
+
+ return retval;
+}
+
#define __ffs(x) (ffs(x) - 1)
-#define PLATFORM_FFS
+
+/*
+ * * hweightN: returns the hamming weight (i.e. the number
+ * * of bits set) of a N-bit word
+ * */
+
+#define hweight32(x) generic_hweight32(x)
+#define hweight16(x) generic_hweight16(x)
+#define hweight8(x) generic_hweight8(x)
#endif /* __KERNEL__ */