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-rw-r--r--arch/nds32/include/asm/io.h41
1 files changed, 38 insertions, 3 deletions
diff --git a/arch/nds32/include/asm/io.h b/arch/nds32/include/asm/io.h
index 39c3dc8d92..04708e9359 100644
--- a/arch/nds32/include/asm/io.h
+++ b/arch/nds32/include/asm/io.h
@@ -7,9 +7,7 @@
* Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0
*
* Modifications:
* 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both
@@ -184,6 +182,43 @@ static inline unsigned int readl(unsigned int *addr)
#define in_8(a) __raw_readb(a)
/*
+ * 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)
+
+/*
* Now, pick up the machine-defined IO definitions
* #include <asm/arch/io.h>
*/
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