1 files changed, 427 insertions, 0 deletions
diff --git a/include/asm-x86/bitops_64.h b/include/asm-x86/bitops_64.h
new file mode 100644
index 000000000000..d4dbbe5f7bd9
--- /dev/null
+++ b/include/asm-x86/bitops_64.h
@@ -0,0 +1,427 @@
+#ifndef _X86_64_BITOPS_H
+#define _X86_64_BITOPS_H
+
+/*
+ * Copyright 1992, Linus Torvalds.
+ */
+
+#include <asm/alternative.h>
+
+#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
+/* Technically wrong, but this avoids compilation errors on some gcc
+   versions. */
+#define ADDR "=m" (*(volatile long *) addr)
+#else
+#define ADDR "+m" (*(volatile long *) addr)
+#endif
+
+/**
+ * set_bit - Atomically set a bit in memory
+ * @nr: the bit to set
+ * @addr: the address to start counting from
+ *
+ * This function is atomic and may not be reordered.  See __set_bit()
+ * if you do not require the atomic guarantees.
+ * Note that @nr may be almost arbitrarily large; this function is not
+ * restricted to acting on a single-word quantity.
+ */
+static __inline__ void set_bit(int nr, volatile void * addr)
+{
+	__asm__ __volatile__( LOCK_PREFIX
+		"btsl %1,%0"
+		:ADDR
+		:"dIr" (nr) : "memory");
+}
+
+/**
+ * __set_bit - Set a bit in memory
+ * @nr: the bit to set
+ * @addr: the address to start counting from
+ *
+ * Unlike set_bit(), this function is non-atomic and may be reordered.
+ * If it's called on the same region of memory simultaneously, the effect
+ * may be that only one operation succeeds.
+ */
+static __inline__ void __set_bit(int nr, volatile void * addr)
+{
+	__asm__ volatile(
+		"btsl %1,%0"
+		:ADDR
+		:"dIr" (nr) : "memory");
+}
+
+/**
+ * clear_bit - Clears a bit in memory
+ * @nr: Bit to clear
+ * @addr: Address to start counting from
+ *
+ * clear_bit() is atomic and may not be reordered.  However, it does
+ * not contain a memory barrier, so if it is used for locking purposes,
+ * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * in order to ensure changes are visible on other processors.
+ */
+static __inline__ void clear_bit(int nr, volatile void * addr)
+{
+	__asm__ __volatile__( LOCK_PREFIX
+		"btrl %1,%0"
+		:ADDR
+		:"dIr" (nr));
+}
+
+static __inline__ void __clear_bit(int nr, volatile void * addr)
+{
+	__asm__ __volatile__(
+		"btrl %1,%0"
+		:ADDR
+		:"dIr" (nr));
+}
+
+#define smp_mb__before_clear_bit()	barrier()
+#define smp_mb__after_clear_bit()	barrier()
+
+/**
+ * __change_bit - Toggle a bit in memory
+ * @nr: the bit to change
+ * @addr: the address to start counting from
+ *
+ * Unlike change_bit(), this function is non-atomic and may be reordered.
+ * If it's called on the same region of memory simultaneously, the effect
+ * may be that only one operation succeeds.
+ */
+static __inline__ void __change_bit(int nr, volatile void * addr)
+{
+	__asm__ __volatile__(
+		"btcl %1,%0"
+		:ADDR
+		:"dIr" (nr));
+}
+
+/**
+ * change_bit - Toggle a bit in memory
+ * @nr: Bit to change
+ * @addr: Address to start counting from
+ *
+ * change_bit() is atomic and may not be reordered.
+ * Note that @nr may be almost arbitrarily large; this function is not
+ * restricted to acting on a single-word quantity.
+ */
+static __inline__ void change_bit(int nr, volatile void * addr)
+{
+	__asm__ __volatile__( LOCK_PREFIX
+		"btcl %1,%0"
+		:ADDR
+		:"dIr" (nr));
+}
+
+/**
+ * test_and_set_bit - Set a bit and return its old value
+ * @nr: Bit to set
+ * @addr: Address to count from
+ *
+ * This operation is atomic and cannot be reordered.  
+ * It also implies a memory barrier.
+ */
+static __inline__ int test_and_set_bit(int nr, volatile void * addr)
+{
+	int oldbit;
+
+	__asm__ __volatile__( LOCK_PREFIX
+		"btsl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit),ADDR
+		:"dIr" (nr) : "memory");
+	return oldbit;
+}
+
+/**
+ * __test_and_set_bit - Set a bit and return its old value
+ * @nr: Bit to set
+ * @addr: Address to count from
+ *
+ * This operation is non-atomic and can be reordered.  
+ * If two examples of this operation race, one can appear to succeed
+ * but actually fail.  You must protect multiple accesses with a lock.
+ */
+static __inline__ int __test_and_set_bit(int nr, volatile void * addr)
+{
+	int oldbit;
+
+	__asm__(
+		"btsl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit),ADDR
+		:"dIr" (nr));
+	return oldbit;
+}
+
+/**
+ * test_and_clear_bit - Clear a bit and return its old value
+ * @nr: Bit to clear
+ * @addr: Address to count from
+ *
+ * This operation is atomic and cannot be reordered.  
+ * It also implies a memory barrier.
+ */
+static __inline__ int test_and_clear_bit(int nr, volatile void * addr)
+{
+	int oldbit;
+
+	__asm__ __volatile__( LOCK_PREFIX
+		"btrl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit),ADDR
+		:"dIr" (nr) : "memory");
+	return oldbit;
+}
+
+/**
+ * __test_and_clear_bit - Clear a bit and return its old value
+ * @nr: Bit to clear
+ * @addr: Address to count from
+ *
+ * This operation is non-atomic and can be reordered.  
+ * If two examples of this operation race, one can appear to succeed
+ * but actually fail.  You must protect multiple accesses with a lock.
+ */
+static __inline__ int __test_and_clear_bit(int nr, volatile void * addr)
+{
+	int oldbit;
+
+	__asm__(
+		"btrl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit),ADDR
+		:"dIr" (nr));
+	return oldbit;
+}
+
+/* WARNING: non atomic and it can be reordered! */
+static __inline__ int __test_and_change_bit(int nr, volatile void * addr)
+{
+	int oldbit;
+
+	__asm__ __volatile__(
+		"btcl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit),ADDR
+		:"dIr" (nr) : "memory");
+	return oldbit;
+}
+
+/**
+ * test_and_change_bit - Change a bit and return its old value
+ * @nr: Bit to change
+ * @addr: Address to count from
+ *
+ * This operation is atomic and cannot be reordered.  
+ * It also implies a memory barrier.
+ */
+static __inline__ int test_and_change_bit(int nr, volatile void * addr)
+{
+	int oldbit;
+
+	__asm__ __volatile__( LOCK_PREFIX
+		"btcl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit),ADDR
+		:"dIr" (nr) : "memory");
+	return oldbit;
+}
+
+#if 0 /* Fool kernel-doc since it doesn't do macros yet */
+/**
+ * test_bit - Determine whether a bit is set
+ * @nr: bit number to test
+ * @addr: Address to start counting from
+ */
+static int test_bit(int nr, const volatile void * addr);
+#endif
+
+static __inline__ int constant_test_bit(int nr, const volatile void * addr)
+{
+	return ((1UL << (nr & 31)) & (((const volatile unsigned int *) addr)[nr >> 5])) != 0;
+}
+
+static __inline__ int variable_test_bit(int nr, volatile const void * addr)
+{
+	int oldbit;
+
+	__asm__ __volatile__(
+		"btl %2,%1\n\tsbbl %0,%0"
+		:"=r" (oldbit)
+		:"m" (*(volatile long *)addr),"dIr" (nr));
+	return oldbit;
+}
+
+#define test_bit(nr,addr) \
+(__builtin_constant_p(nr) ? \
+ constant_test_bit((nr),(addr)) : \
+ variable_test_bit((nr),(addr)))
+
+#undef ADDR
+
+extern long find_first_zero_bit(const unsigned long * addr, unsigned long size);
+extern long find_next_zero_bit (const unsigned long * addr, long size, long offset);
+extern long find_first_bit(const unsigned long * addr, unsigned long size);
+extern long find_next_bit(const unsigned long * addr, long size, long offset);
+
+/* return index of first bet set in val or max when no bit is set */
+static inline unsigned long __scanbit(unsigned long val, unsigned long max)
+{
+	asm("bsfq %1,%0 ; cmovz %2,%0" : "=&r" (val) : "r" (val), "r" (max));
+	return val;
+}
+
+#define find_first_bit(addr,size) \
+((__builtin_constant_p(size) && (size) <= BITS_PER_LONG ? \
+  (__scanbit(*(unsigned long *)addr,(size))) : \
+  find_first_bit(addr,size)))
+
+#define find_next_bit(addr,size,off) \
+((__builtin_constant_p(size) && (size) <= BITS_PER_LONG ? 	  \
+  ((off) + (__scanbit((*(unsigned long *)addr) >> (off),(size)-(off)))) : \
+	find_next_bit(addr,size,off)))
+
+#define find_first_zero_bit(addr,size) \
+((__builtin_constant_p(size) && (size) <= BITS_PER_LONG ? \
+  (__scanbit(~*(unsigned long *)addr,(size))) : \
+  	find_first_zero_bit(addr,size)))
+	
+#define find_next_zero_bit(addr,size,off) \
+((__builtin_constant_p(size) && (size) <= BITS_PER_LONG ? 	  \
+  ((off)+(__scanbit(~(((*(unsigned long *)addr)) >> (off)),(size)-(off)))) : \
+	find_next_zero_bit(addr,size,off)))
+
+/* 
+ * Find string of zero bits in a bitmap. -1 when not found.
+ */ 
+extern unsigned long 
+find_next_zero_string(unsigned long *bitmap, long start, long nbits, int len);
+
+static inline void set_bit_string(unsigned long *bitmap, unsigned long i, 
+				  int len) 
+{ 
+	unsigned long end = i + len; 
+	while (i < end) {
+		__set_bit(i, bitmap); 
+		i++;
+	}
+} 
+
+static inline void __clear_bit_string(unsigned long *bitmap, unsigned long i, 
+				    int len) 
+{ 
+	unsigned long end = i + len; 
+	while (i < end) {
+		__clear_bit(i, bitmap); 
+		i++;
+	}
+} 
+
+/**
+ * ffz - find first zero in word.
+ * @word: The word to search
+ *
+ * Undefined if no zero exists, so code should check against ~0UL first.
+ */
+static __inline__ unsigned long ffz(unsigned long word)
+{
+	__asm__("bsfq %1,%0"
+		:"=r" (word)
+		:"r" (~word));
+	return word;
+}
+
+/**
+ * __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__ unsigned long __ffs(unsigned long word)
+{
+	__asm__("bsfq %1,%0"
+		:"=r" (word)
+		:"rm" (word));
+	return word;
+}
+
+/*
+ * __fls: find last bit set.
+ * @word: The word to search
+ *
+ * Undefined if no zero exists, so code should check against ~0UL first.
+ */
+static __inline__ unsigned long __fls(unsigned long word)
+{
+	__asm__("bsrq %1,%0"
+		:"=r" (word)
+		:"rm" (word));
+	return word;
+}
+
+#ifdef __KERNEL__
+
+#include <asm-generic/bitops/sched.h>
+
+/**
+ * ffs - find first bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+static __inline__ int ffs(int x)
+{
+	int r;
+
+	__asm__("bsfl %1,%0\n\t"
+		"cmovzl %2,%0" 
+		: "=r" (r) : "rm" (x), "r" (-1));
+	return r+1;
+}
+
+/**
+ * fls64 - find last bit set in 64 bit word
+ * @x: the word to search
+ *
+ * This is defined the same way as fls.
+ */
+static __inline__ int fls64(__u64 x)
+{
+	if (x == 0)
+		return 0;
+	return __fls(x) + 1;
+}
+
+/**
+ * fls - find last bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ */
+static __inline__ int fls(int x)
+{
+	int r;
+
+	__asm__("bsrl %1,%0\n\t"
+		"cmovzl %2,%0"
+		: "=&r" (r) : "rm" (x), "rm" (-1));
+	return r+1;
+}
+
+#define ARCH_HAS_FAST_MULTIPLIER 1
+
+#include <asm-generic/bitops/hweight.h>
+
+#endif /* __KERNEL__ */
+
+#ifdef __KERNEL__
+
+#include <asm-generic/bitops/ext2-non-atomic.h>
+
+#define ext2_set_bit_atomic(lock,nr,addr) \
+	        test_and_set_bit((nr),(unsigned long*)addr)
+#define ext2_clear_bit_atomic(lock,nr,addr) \
+	        test_and_clear_bit((nr),(unsigned long*)addr)
+
+#include <asm-generic/bitops/minix.h>
+
+#endif /* __KERNEL__ */
+
+#endif /* _X86_64_BITOPS_H */