sh: Add bit control functions

This provide bit control functions as clrbits_*, setbits_* and
clrsetbits_*.

V2: Fix comment style and error of whitespace.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

1 files changed, 40 insertions, 3 deletions

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index ca598a60f3..0a00db3617 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -147,13 +147,13 @@ extern void __iounmap(void *addr);
  */
 #ifdef iomem_valid_addr
 #define __arch_ioremap(off, sz, nocache)				\
- ({								\
+({								\
 	unsigned long _off = (off), _size = (sz);		\
 	void *_ret = (void *)0;					\
 	if (iomem_valid_addr(_off, _size))			\
 		_ret = __ioremap(iomem_to_phys(_off), _size, 0);	\
 	_ret;							\
- })
+})
 
 #define __arch_iounmap __iounmap
 #endif
@@ -238,6 +238,43 @@ static inline void sync(void)
 }
 
 /*
+ * Clear and set bits in one shot. These macros can be used to clear and
+ * set multiple bits in a register using a single call. These macros can
+ * also be used to set a multiple-bit bit pattern using a mask, by
+ * specifying the mask in the 'clear' parameter and the new bit pattern
+ * in the 'set' parameter.
+ */
+
+#define clrbits(type, addr, clear) \
+		out_##type((addr), in_##type(addr) & ~(clear))
+
+#define setbits(type, addr, set) \
+		out_##type((addr), in_##type(addr) | (set))
+
+#define clrsetbits(type, addr, clear, set) \
+		out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
+
+#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
+#define setbits_be32(addr, set) setbits(be32, addr, set)
+#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
+
+#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
+#define setbits_le32(addr, set) setbits(le32, addr, set)
+#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
+
+#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
+#define setbits_be16(addr, set) setbits(be16, addr, set)
+#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
+
+#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
+#define setbits_le16(addr, set) setbits(le16, addr, set)
+#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
+
+#define clrbits_8(addr, clear) clrbits(8, addr, clear)
+#define setbits_8(addr, set) setbits(8, addr, set)
+#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
+
+/*
  * Given a physical address and a length, return a virtual address
  * that can be used to access the memory range with the caching
  * properties specified by "flags".
@@ -261,7 +298,7 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
 
 }
 
-static inline phys_addr_t virt_to_phys(void * vaddr)
+static inline phys_addr_t virt_to_phys(void *vaddr)
 {
 	return (phys_addr_t)(vaddr);
 }