#ifndef _ALPHA_BITOPS_H
#define _ALPHA_BITOPS_H
-#include <linux/config.h>
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
#include <asm/compiler.h>
+#include <asm/barrier.h>
/*
* Copyright 1994, Linus Torvalds.
:"Ir" (1UL << (nr & 31)), "m" (*m));
}
+static inline void
+clear_bit_unlock(unsigned long nr, volatile void * addr)
+{
+ smp_mb();
+ clear_bit(nr, addr);
+}
+
/*
* WARNING: non atomic version.
*/
*m &= ~(1 << (nr & 31));
}
+static inline void
+__clear_bit_unlock(unsigned long nr, volatile void * addr)
+{
+ smp_mb();
+ __clear_bit(nr, addr);
+}
+
static inline void
change_bit(unsigned long nr, volatile void * addr)
{
unsigned long temp;
int *m = ((int *) addr) + (nr >> 5);
+ __asm__ __volatile__(
+#ifdef CONFIG_SMP
+ " mb\n"
+#endif
+ "1: ldl_l %0,%4\n"
+ " and %0,%3,%2\n"
+ " bne %2,2f\n"
+ " xor %0,%3,%0\n"
+ " stl_c %0,%1\n"
+ " beq %0,3f\n"
+ "2:\n"
+#ifdef CONFIG_SMP
+ " mb\n"
+#endif
+ ".subsection 2\n"
+ "3: br 1b\n"
+ ".previous"
+ :"=&r" (temp), "=m" (*m), "=&r" (oldbit)
+ :"Ir" (1UL << (nr & 31)), "m" (*m) : "memory");
+
+ return oldbit != 0;
+}
+
+static inline int
+test_and_set_bit_lock(unsigned long nr, volatile void *addr)
+{
+ unsigned long oldbit;
+ unsigned long temp;
+ int *m = ((int *) addr) + (nr >> 5);
+
__asm__ __volatile__(
"1: ldl_l %0,%4\n"
" and %0,%3,%2\n"
int *m = ((int *) addr) + (nr >> 5);
__asm__ __volatile__(
+#ifdef CONFIG_SMP
+ " mb\n"
+#endif
"1: ldl_l %0,%4\n"
" and %0,%3,%2\n"
" beq %2,2f\n"
int *m = ((int *) addr) + (nr >> 5);
__asm__ __volatile__(
+#ifdef CONFIG_SMP
+ " mb\n"
+#endif
"1: ldl_l %0,%4\n"
" and %0,%3,%2\n"
" xor %0,%3,%0\n"
static inline unsigned long ffz(unsigned long word)
{
-#if defined(__alpha_cix__) && defined(__alpha_fix__)
+#if defined(CONFIG_ALPHA_EV6) && defined(CONFIG_ALPHA_EV67)
/* Whee. EV67 can calculate it directly. */
return __kernel_cttz(~word);
#else
*/
static inline unsigned long __ffs(unsigned long word)
{
-#if defined(__alpha_cix__) && defined(__alpha_fix__)
+#if defined(CONFIG_ALPHA_EV6) && defined(CONFIG_ALPHA_EV67)
/* Whee. EV67 can calculate it directly. */
return __kernel_cttz(word);
#else
/*
* fls: find last bit set.
*/
-#if defined(__alpha_cix__) && defined(__alpha_fix__)
-static inline int fls(int word)
+#if defined(CONFIG_ALPHA_EV6) && defined(CONFIG_ALPHA_EV67)
+static inline int fls64(unsigned long word)
{
- return 64 - __kernel_ctlz(word & 0xffffffff);
+ return 64 - __kernel_ctlz(word);
}
#else
-#define fls generic_fls
-#endif
-#define fls64 generic_fls64
+extern const unsigned char __flsm1_tab[256];
-/* Compute powers of two for the given integer. */
-static inline long floor_log2(unsigned long word)
+static inline int fls64(unsigned long x)
{
-#if defined(__alpha_cix__) && defined(__alpha_fix__)
- return 63 - __kernel_ctlz(word);
-#else
- long bit;
- for (bit = -1; word ; bit++)
- word >>= 1;
- return bit;
-#endif
+ unsigned long t, a, r;
+
+ t = __kernel_cmpbge (x, 0x0101010101010101UL);
+ a = __flsm1_tab[t];
+ t = __kernel_extbl (x, a);
+ r = a*8 + __flsm1_tab[t] + (x != 0);
+
+ return r;
}
+#endif
-static inline long ceil_log2(unsigned long word)
+static inline int fls(int x)
{
- long bit = floor_log2(word);
- return bit + (word > (1UL << bit));
+ return fls64((unsigned int) x);
}
/*
* of bits set) of a N-bit word
*/
-#if defined(__alpha_cix__) && defined(__alpha_fix__)
+#if defined(CONFIG_ALPHA_EV6) && defined(CONFIG_ALPHA_EV67)
/* Whee. EV67 can calculate it directly. */
static inline unsigned long hweight64(unsigned long w)
{
return __kernel_ctpop(w);
}
-#define hweight32(x) (unsigned int) hweight64((x) & 0xfffffffful)
-#define hweight16(x) (unsigned int) hweight64((x) & 0xfffful)
-#define hweight8(x) (unsigned int) hweight64((x) & 0xfful)
-#else
-static inline unsigned long hweight64(unsigned long w)
+static inline unsigned int hweight32(unsigned int w)
{
- unsigned long result;
- for (result = 0; w ; w >>= 1)
- result += (w & 1);
- return result;
+ return hweight64(w);
}
-#define hweight32(x) generic_hweight32(x)
-#define hweight16(x) generic_hweight16(x)
-#define hweight8(x) generic_hweight8(x)
-#endif
-
-#endif /* __KERNEL__ */
-
-/*
- * Find next zero bit in a bitmap reasonably efficiently..
- */
-static inline unsigned long
-find_next_zero_bit(const void *addr, unsigned long size, unsigned long offset)
+static inline unsigned int hweight16(unsigned int w)
{
- const unsigned long *p = addr;
- unsigned long result = offset & ~63UL;
- unsigned long tmp;
-
- p += offset >> 6;
- if (offset >= size)
- return size;
- size -= result;
- offset &= 63UL;
- if (offset) {
- tmp = *(p++);
- tmp |= ~0UL >> (64-offset);
- if (size < 64)
- goto found_first;
- if (~tmp)
- goto found_middle;
- size -= 64;
- result += 64;
- }
- while (size & ~63UL) {
- if (~(tmp = *(p++)))
- goto found_middle;
- result += 64;
- size -= 64;
- }
- if (!size)
- return result;
- tmp = *p;
- found_first:
- tmp |= ~0UL << size;
- if (tmp == ~0UL) /* Are any bits zero? */
- return result + size; /* Nope. */
- found_middle:
- return result + ffz(tmp);
+ return hweight64(w & 0xffff);
}
-/*
- * Find next one bit in a bitmap reasonably efficiently.
- */
-static inline unsigned long
-find_next_bit(const void * addr, unsigned long size, unsigned long offset)
+static inline unsigned int hweight8(unsigned int w)
{
- const unsigned long *p = addr;
- unsigned long result = offset & ~63UL;
- unsigned long tmp;
-
- p += offset >> 6;
- if (offset >= size)
- return size;
- size -= result;
- offset &= 63UL;
- if (offset) {
- tmp = *(p++);
- tmp &= ~0UL << offset;
- if (size < 64)
- goto found_first;
- if (tmp)
- goto found_middle;
- size -= 64;
- result += 64;
- }
- while (size & ~63UL) {
- if ((tmp = *(p++)))
- goto found_middle;
- result += 64;
- size -= 64;
- }
- if (!size)
- return result;
- tmp = *p;
- found_first:
- tmp &= ~0UL >> (64 - size);
- if (!tmp)
- return result + size;
- found_middle:
- return result + __ffs(tmp);
+ return hweight64(w & 0xff);
}
+#else
+#include <asm-generic/bitops/hweight.h>
+#endif
-/*
- * The optimizer actually does good code for this case.
- */
-#define find_first_zero_bit(addr, size) \
- find_next_zero_bit((addr), (size), 0)
-#define find_first_bit(addr, size) \
- find_next_bit((addr), (size), 0)
+#endif /* __KERNEL__ */
+
+#include <asm-generic/bitops/find.h>
#ifdef __KERNEL__
return __ffs(b0) + ofs;
}
+#include <asm-generic/bitops/ext2-non-atomic.h>
-#define ext2_set_bit __test_and_set_bit
#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
-#define ext2_clear_bit __test_and_clear_bit
#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
-#define ext2_test_bit test_bit
-#define ext2_find_first_zero_bit find_first_zero_bit
-#define ext2_find_next_zero_bit find_next_zero_bit
-
-/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit(nr,addr) __test_and_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) __set_bit(nr,addr)
-#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
-#define minix_test_bit(nr,addr) test_bit(nr,addr)
-#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)
+
+#include <asm-generic/bitops/minix.h>
#endif /* __KERNEL__ */
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