sh: Update core code of SuperH.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

1 files changed, 164 insertions, 11 deletions

diff --git a/include/asm-sh/bitops.h b/include/asm-sh/bitops.h
index 44dca9ff6..529d0f2db 100644
--- a/include/asm-sh/bitops.h
+++ b/include/asm-sh/bitops.h
@@ -1,13 +1,166 @@
-#ifndef __ASM_SH_BITOPS_H_
-#define __ASM_SH_BITOPS_H_
-
-extern void set_bit(int nr, volatile void * a);
-extern void clear_bit(int nr, volatile void * a);
-extern int test_and_clear_bit(int nr, volatile void * a);
-extern void change_bit(unsigned long nr, volatile void *addr);
-extern int test_and_set_bit(int nr, volatile void * a);
-extern int test_and_change_bit(int nr, volatile void * addr);
-extern int test_bit(int nr, volatile void * a);
-extern int ffs(int i);
+#ifndef __ASM_SH_BITOPS_H
+#define __ASM_SH_BITOPS_H
 
+#ifdef __KERNEL__
+//#include <asm/system.h>
+#include <asm/irqflags.h>
+/* For __swab32 */
+#include <asm/byteorder.h>
+
+static inline void set_bit(int nr, volatile void * addr)
+{
+	int	mask;
+	volatile unsigned int *a = addr;
+	unsigned long flags;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	local_irq_save(flags);
+	*a |= mask;
+	local_irq_restore(flags);
+}
+
+/*
+ * clear_bit() doesn't provide any barrier for the compiler.
+ */
+#define smp_mb__before_clear_bit()	barrier()
+#define smp_mb__after_clear_bit()	barrier()
+static inline void clear_bit(int nr, volatile void * addr)
+{
+	int	mask;
+	volatile unsigned int *a = addr;
+	unsigned long flags;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	local_irq_save(flags);
+	*a &= ~mask;
+	local_irq_restore(flags);
+}
+
+static inline void change_bit(int nr, volatile void * addr)
+{
+	int	mask;
+	volatile unsigned int *a = addr;
+	unsigned long flags;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	local_irq_save(flags);
+	*a ^= mask;
+	local_irq_restore(flags);
+}
+
+static inline int test_and_set_bit(int nr, volatile void * addr)
+{
+	int	mask, retval;
+	volatile unsigned int *a = addr;
+	unsigned long flags;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	local_irq_save(flags);
+	retval = (mask & *a) != 0;
+	*a |= mask;
+	local_irq_restore(flags);
+
+	return retval;
+}
+
+static inline int test_and_clear_bit(int nr, volatile void * addr)
+{
+	int	mask, retval;
+	volatile unsigned int *a = addr;
+	unsigned long flags;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	local_irq_save(flags);
+	retval = (mask & *a) != 0;
+	*a &= ~mask;
+	local_irq_restore(flags);
+
+	return retval;
+}
+
+static inline int test_and_change_bit(int nr, volatile void * addr)
+{
+	int	mask, retval;
+	volatile unsigned int *a = addr;
+	unsigned long flags;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	local_irq_save(flags);
+	retval = (mask & *a) != 0;
+	*a ^= mask;
+	local_irq_restore(flags);
+
+	return retval;
+}
+
+//#include <asm-generic/bitops/non-atomic.h>
+
+static inline unsigned long ffz(unsigned long word)
+{
+	unsigned long result;
+
+	__asm__("1:\n\t"
+		"shlr	%1\n\t"
+		"bt/s	1b\n\t"
+		" add	#1, %0"
+		: "=r" (result), "=r" (word)
+		: "0" (~0L), "1" (word)
+		: "t");
+	return result;
+}
+
+/**
+ * ffs - find first bit in word.
+ * @word: The word to search
+ *
+ * Undefined if no bit exists, so code should check against 0 first.
+ */
+static 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;
+}
+
+#if 0
+#include <asm-generic/bitops/find.h>
+#include <asm-generic/bitops/ffs.h>
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/ext2-non-atomic.h>
+#include <asm-generic/bitops/ext2-atomic.h>
+#include <asm-generic/bitops/minix.h>
+#include <asm-generic/bitops/fls.h>
+#include <asm-generic/bitops/fls64.h>
 #endif
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_SH_BITOPS_H */