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authorPeter Tyser <ptyser@xes-inc.com>2010-04-13 03:28:08 (GMT)
committerWolfgang Denk <wd@denx.de>2010-04-13 07:13:12 (GMT)
commit819833af39a91fa1c1e8252862bbda6f5a602f7b (patch)
treed5c9d1628643347ab2b5a8085acfa6f96709fda3 /arch/m68k/include/asm/bitops.h
parent61f2b38a17f5b21c59f2afe6cf1cbb5f28638cf9 (diff)
downloadu-boot-fsl-qoriq-819833af39a91fa1c1e8252862bbda6f5a602f7b.tar.xz
Move architecture-specific includes to arch/$ARCH/include/asm
This helps to clean up the include/ directory so that it only contains non-architecture-specific headers and also matches Linux's directory layout which many U-Boot developers are already familiar with. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'arch/m68k/include/asm/bitops.h')
-rw-r--r--arch/m68k/include/asm/bitops.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h
new file mode 100644
index 0000000..ad971b4
--- /dev/null
+++ b/arch/m68k/include/asm/bitops.h
@@ -0,0 +1,58 @@
+/*
+ * bitops.h: Bit string operations on the m68k
+ */
+
+#ifndef _M68K_BITOPS_H
+#define _M68K_BITOPS_H
+
+#include <linux/config.h>
+#include <asm/byteorder.h>
+
+extern void set_bit(int nr, volatile void *addr);
+extern void clear_bit(int nr, volatile void *addr);
+extern void change_bit(int nr, volatile void *addr);
+extern int test_and_set_bit(int nr, volatile void *addr);
+extern int test_and_clear_bit(int nr, volatile void *addr);
+extern int test_and_change_bit(int nr, volatile void *addr);
+
+#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;
+}
+#define __ffs(x) (ffs(x) - 1)
+#define PLATFORM_FFS
+
+#endif /* __KERNEL__ */
+
+#endif /* _M68K_BITOPS_H */