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Diffstat (limited to 'arch/blackfin/include/asm/bitops.h')
-rw-r--r--arch/blackfin/include/asm/bitops.h189
1 files changed, 125 insertions, 64 deletions
diff --git a/arch/blackfin/include/asm/bitops.h b/arch/blackfin/include/asm/bitops.h
index c428e4106f89..9964e17232e9 100644
--- a/arch/blackfin/include/asm/bitops.h
+++ b/arch/blackfin/include/asm/bitops.h
@@ -7,7 +7,6 @@
#include <linux/compiler.h>
#include <asm/byteorder.h> /* swab32 */
-#include <asm/system.h> /* save_flags */
#ifdef __KERNEL__
@@ -20,36 +19,71 @@
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/ffz.h>
-static __inline__ void set_bit(int nr, volatile unsigned long *addr)
+#ifdef CONFIG_SMP
+
+#include <linux/linkage.h>
+
+asmlinkage int __raw_bit_set_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_clear_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_toggle_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_test_set_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_test_clear_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_test_toggle_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_test_asm(const volatile unsigned long *addr, int nr);
+
+static inline void set_bit(int nr, volatile unsigned long *addr)
{
- int *a = (int *)addr;
- int mask;
- unsigned long flags;
+ volatile unsigned long *a = addr + (nr >> 5);
+ __raw_bit_set_asm(a, nr & 0x1f);
+}
- a += nr >> 5;
- mask = 1 << (nr & 0x1f);
- local_irq_save(flags);
- *a |= mask;
- local_irq_restore(flags);
+static inline void clear_bit(int nr, volatile unsigned long *addr)
+{
+ volatile unsigned long *a = addr + (nr >> 5);
+ __raw_bit_clear_asm(a, nr & 0x1f);
}
-static __inline__ void __set_bit(int nr, volatile unsigned long *addr)
+static inline void change_bit(int nr, volatile unsigned long *addr)
{
- int *a = (int *)addr;
- int mask;
+ volatile unsigned long *a = addr + (nr >> 5);
+ __raw_bit_toggle_asm(a, nr & 0x1f);
+}
- a += nr >> 5;
- mask = 1 << (nr & 0x1f);
- *a |= mask;
+static inline int test_bit(int nr, const volatile unsigned long *addr)
+{
+ volatile const unsigned long *a = addr + (nr >> 5);
+ return __raw_bit_test_asm(a, nr & 0x1f) != 0;
}
-/*
- * 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 int test_and_set_bit(int nr, volatile unsigned long *addr)
+{
+ volatile unsigned long *a = addr + (nr >> 5);
+ return __raw_bit_test_set_asm(a, nr & 0x1f);
+}
-static __inline__ void clear_bit(int nr, volatile unsigned long *addr)
+static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
+{
+ volatile unsigned long *a = addr + (nr >> 5);
+ return __raw_bit_test_clear_asm(a, nr & 0x1f);
+}
+
+static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
+{
+ volatile unsigned long *a = addr + (nr >> 5);
+ return __raw_bit_test_toggle_asm(a, nr & 0x1f);
+}
+
+#else /* !CONFIG_SMP */
+
+#include <asm/system.h> /* save_flags */
+
+static inline void set_bit(int nr, volatile unsigned long *addr)
{
int *a = (int *)addr;
int mask;
@@ -57,21 +91,23 @@ static __inline__ void clear_bit(int nr, volatile unsigned long *addr)
a += nr >> 5;
mask = 1 << (nr & 0x1f);
local_irq_save(flags);
- *a &= ~mask;
+ *a |= mask;
local_irq_restore(flags);
}
-static __inline__ void __clear_bit(int nr, volatile unsigned long *addr)
+static inline void clear_bit(int nr, volatile unsigned long *addr)
{
int *a = (int *)addr;
int mask;
-
+ 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 unsigned long *addr)
+static inline void change_bit(int nr, volatile unsigned long *addr)
{
int mask, flags;
unsigned long *ADDR = (unsigned long *)addr;
@@ -83,17 +119,7 @@ static __inline__ void change_bit(int nr, volatile unsigned long *addr)
local_irq_restore(flags);
}
-static __inline__ void __change_bit(int nr, volatile unsigned long *addr)
-{
- int mask;
- unsigned long *ADDR = (unsigned long *)addr;
-
- ADDR += nr >> 5;
- mask = 1 << (nr & 31);
- *ADDR ^= mask;
-}
-
-static __inline__ int test_and_set_bit(int nr, void *addr)
+static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)addr;
@@ -109,19 +135,23 @@ static __inline__ int test_and_set_bit(int nr, void *addr)
return retval;
}
-static __inline__ int __test_and_set_bit(int nr, volatile unsigned long *addr)
+static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)addr;
+ unsigned long flags;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
+ local_irq_save(flags);
retval = (mask & *a) != 0;
- *a |= mask;
+ *a &= ~mask;
+ local_irq_restore(flags);
+
return retval;
}
-static __inline__ int test_and_clear_bit(int nr, volatile unsigned long *addr)
+static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)addr;
@@ -131,13 +161,50 @@ static __inline__ int test_and_clear_bit(int nr, volatile unsigned long *addr)
mask = 1 << (nr & 0x1f);
local_irq_save(flags);
retval = (mask & *a) != 0;
- *a &= ~mask;
+ *a ^= mask;
local_irq_restore(flags);
-
return retval;
}
-static __inline__ int __test_and_clear_bit(int nr, volatile unsigned long *addr)
+#endif /* CONFIG_SMP */
+
+/*
+ * 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 __set_bit(int nr, volatile unsigned long *addr)
+{
+ int *a = (int *)addr;
+ int mask;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ *a |= mask;
+}
+
+static inline void __clear_bit(int nr, volatile unsigned long *addr)
+{
+ int *a = (int *)addr;
+ int mask;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ *a &= ~mask;
+}
+
+static inline void __change_bit(int nr, volatile unsigned long *addr)
+{
+ int mask;
+ unsigned long *ADDR = (unsigned long *)addr;
+
+ ADDR += nr >> 5;
+ mask = 1 << (nr & 31);
+ *ADDR ^= mask;
+}
+
+static inline int __test_and_set_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)addr;
@@ -145,26 +212,23 @@ static __inline__ int __test_and_clear_bit(int nr, volatile unsigned long *addr)
a += nr >> 5;
mask = 1 << (nr & 0x1f);
retval = (mask & *a) != 0;
- *a &= ~mask;
+ *a |= mask;
return retval;
}
-static __inline__ int test_and_change_bit(int nr, volatile unsigned long *addr)
+static inline int __test_and_clear_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)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);
+ *a &= ~mask;
return retval;
}
-static __inline__ int __test_and_change_bit(int nr,
+static inline int __test_and_change_bit(int nr,
volatile unsigned long *addr)
{
int mask, retval;
@@ -177,16 +241,7 @@ static __inline__ int __test_and_change_bit(int nr,
return retval;
}
-/*
- * This routine doesn't need to be atomic.
- */
-static __inline__ int __constant_test_bit(int nr, const void *addr)
-{
- return ((1UL << (nr & 31)) &
- (((const volatile unsigned int *)addr)[nr >> 5])) != 0;
-}
-
-static __inline__ int __test_bit(int nr, const void *addr)
+static inline int __test_bit(int nr, const void *addr)
{
int *a = (int *)addr;
int mask;
@@ -196,10 +251,16 @@ static __inline__ int __test_bit(int nr, const void *addr)
return ((mask & *a) != 0);
}
-#define test_bit(nr,addr) \
-(__builtin_constant_p(nr) ? \
- __constant_test_bit((nr),(addr)) : \
- __test_bit((nr),(addr)))
+#ifndef CONFIG_SMP
+/*
+ * This routine doesn't need irq save and restore ops in UP
+ * context.
+ */
+static inline int test_bit(int nr, const void *addr)
+{
+ return __test_bit(nr, addr);
+}
+#endif
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/hweight.h>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 16:20:29 +0100