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authorWolfgang Grandegger <wg@grandegger.com>2008-06-04 12:45:22 +0200
committerAndrew Fleming-AFLEMING <afleming@freescale.com>2008-06-10 18:22:26 -0500
commit398415114f0a705163a14543e9fef03f734b1ffa (patch)
tree2f1a4523228aa2531a439b03f6463a4322cddca1
parent4677988c7edc070c3786d3db7994abeca3ab82a0 (diff)
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PPC: add accessor macros to clear and set bits in one shot
PPC: add accessor macros to clear and set bits in one shot This patch adds macros from linux/include/asm-powerpc/io.h to clear and set bits in one shot using the in_be32, out_be32, etc. accessor functions. They are very handy to manipulate bits it I/O registers. This patch is required for my forthcoming FSL NAND UPM driver re-write and the support for the TQM8548 module. Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
-rw-r--r--include/asm-ppc/io.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/include/asm-ppc/io.h b/include/asm-ppc/io.h
index 7cc28bf..c349681 100644
--- a/include/asm-ppc/io.h
+++ b/include/asm-ppc/io.h
@@ -238,6 +238,42 @@ extern inline void out_be32(volatile unsigned __iomem *addr, int val)
__asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
}
+/* 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