1 files changed, 294 insertions, 0 deletions

diff --git a/include/asm-sparc64/bitops.h b/include/asm-sparc64/bitops.h
new file mode 100644
index 000000000000..9d722dc8cca3
--- /dev/null
+++ b/include/asm-sparc64/bitops.h
@@ -0,0 +1,294 @@
+/* $Id: bitops.h,v 1.39 2002/01/30 01:40:00 davem Exp $
+ * bitops.h: Bit string operations on the V9.
+ *
+ * Copyright 1996, 1997 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef _SPARC64_BITOPS_H
+#define _SPARC64_BITOPS_H
+
+#include <linux/config.h>
+#include <linux/compiler.h>
+#include <asm/byteorder.h>
+
+extern int test_and_set_bit(unsigned long nr, volatile unsigned long *addr);
+extern int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr);
+extern int test_and_change_bit(unsigned long nr, volatile unsigned long *addr);
+extern void set_bit(unsigned long nr, volatile unsigned long *addr);
+extern void clear_bit(unsigned long nr, volatile unsigned long *addr);
+extern void change_bit(unsigned long nr, volatile unsigned long *addr);
+
+/* "non-atomic" versions... */
+
+static __inline__ void __set_bit(int nr, volatile unsigned long *addr)
+{
+        volatile unsigned long *m = addr + (nr >> 6);
+
+        *m |= (1UL << (nr & 63));
+}
+
+static __inline__ void __clear_bit(int nr, volatile unsigned long *addr)
+{
+        volatile unsigned long *m = addr + (nr >> 6);
+
+        *m &= ~(1UL << (nr & 63));
+}
+
+static __inline__ void __change_bit(int nr, volatile unsigned long *addr)
+{
+        volatile unsigned long *m = addr + (nr >> 6);
+
+        *m ^= (1UL << (nr & 63));
+}
+
+static __inline__ int __test_and_set_bit(int nr, volatile unsigned long *addr)
+{
+        volatile unsigned long *m = addr + (nr >> 6);
+        long old = *m;
+        long mask = (1UL << (nr & 63));
+
+        *m = (old | mask);
+        return ((old & mask) != 0);
+}
+
+static __inline__ int __test_and_clear_bit(int nr, volatile unsigned long *addr)
+{
+        volatile unsigned long *m = addr + (nr >> 6);
+        long old = *m;
+        long mask = (1UL << (nr & 63));
+
+        *m = (old & ~mask);
+        return ((old & mask) != 0);
+}
+
+static __inline__ int __test_and_change_bit(int nr, volatile unsigned long *addr)
+{
+        volatile unsigned long *m = addr + (nr >> 6);
+        long old = *m;
+        long mask = (1UL << (nr & 63));
+
+        *m = (old ^ mask);
+        return ((old & mask) != 0);
+}
+
+#ifdef CONFIG_SMP
+#define smp_mb__before_clear_bit()      membar("#StoreLoad | #LoadLoad")
+#define smp_mb__after_clear_bit()       membar("#StoreLoad | #StoreStore")
+#else
+#define smp_mb__before_clear_bit()      barrier()
+#define smp_mb__after_clear_bit()       barrier()
+#endif
+
+static __inline__ int test_bit(int nr, __const__ volatile unsigned long *addr)
+{
+        return (1UL & ((addr)[nr >> 6] >> (nr & 63))) != 0UL;
+}
+
+/* The easy/cheese version for now. */
+static __inline__ unsigned long ffz(unsigned long word)
+{
+        unsigned long result;
+
+        result = 0;
+        while(word & 1) {
+                result++;
+                word >>= 1;
+        }
+        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__ unsigned long __ffs(unsigned long word)
+{
+        unsigned long result = 0;
+
+        while (!(word & 1UL)) {
+                result++;
+                word >>= 1;
+        }
+        return result;
+}
+
+/*
+ * fls: find last bit set.
+ */
+
+#define fls(x) generic_fls(x)
+
+#ifdef __KERNEL__
+
+/*
+ * Every architecture must define this function. It's the fastest
+ * way of searching a 140-bit bitmap where the first 100 bits are
+ * unlikely to be set. It's guaranteed that at least one of the 140
+ * bits is cleared.
+ */
+static inline int sched_find_first_bit(unsigned long *b)
+{
+        if (unlikely(b[0]))
+                return __ffs(b[0]);
+        if (unlikely(((unsigned int)b[1])))
+                return __ffs(b[1]) + 64;
+        if (b[1] >> 32)
+                return __ffs(b[1] >> 32) + 96;
+        return __ffs(b[2]) + 128;
+}
+
+/*
+ * ffs: find first bit set. 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)
+{
+        if (!x)
+                return 0;
+        return __ffs((unsigned long)x) + 1;
+}
+
+/*
+ * hweightN: returns the hamming weight (i.e. the number
+ * of bits set) of a N-bit word
+ */
+
+#ifdef ULTRA_HAS_POPULATION_COUNT
+
+static __inline__ unsigned int hweight64(unsigned long w)
+{
+        unsigned int res;
+
+        __asm__ ("popc %1,%0" : "=r" (res) : "r" (w));
+        return res;
+}
+
+static __inline__ unsigned int hweight32(unsigned int w)
+{
+        unsigned int res;
+
+        __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffffffff));
+        return res;
+}
+
+static __inline__ unsigned int hweight16(unsigned int w)
+{
+        unsigned int res;
+
+        __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffff));
+        return res;
+}
+
+static __inline__ unsigned int hweight8(unsigned int w)
+{
+        unsigned int res;
+
+        __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xff));
+        return res;
+}
+
+#else
+
+#define hweight64(x) generic_hweight64(x)
+#define hweight32(x) generic_hweight32(x)
+#define hweight16(x) generic_hweight16(x)
+#define hweight8(x) generic_hweight8(x)
+
+#endif
+#endif /* __KERNEL__ */
+
+/**
+ * find_next_bit - find the next set bit in a memory region
+ * @addr: The address to base the search on
+ * @offset: The bitnumber to start searching at
+ * @size: The maximum size to search
+ */
+extern unsigned long find_next_bit(const unsigned long *, unsigned long,
+                                        unsigned long);
+
+/**
+ * find_first_bit - find the first set bit in a memory region
+ * @addr: The address to start the search at
+ * @size: The maximum size to search
+ *
+ * Returns the bit-number of the first set bit, not the number of the byte
+ * containing a bit.
+ */
+#define find_first_bit(addr, size) \
+        find_next_bit((addr), (size), 0)
+
+/* find_next_zero_bit() finds the first zero bit in a bit string of length
+ * 'size' bits, starting the search at bit 'offset'. This is largely based
+ * on Linus's ALPHA routines, which are pretty portable BTW.
+ */
+
+extern unsigned long find_next_zero_bit(const unsigned long *,
+                                        unsigned long, unsigned long);
+
+#define find_first_zero_bit(addr, size) \
+        find_next_zero_bit((addr), (size), 0)
+
+#define test_and_set_le_bit(nr,addr)    \
+        test_and_set_bit((nr) ^ 0x38, (addr))
+#define test_and_clear_le_bit(nr,addr)  \
+        test_and_clear_bit((nr) ^ 0x38, (addr))
+
+static __inline__ int test_le_bit(int nr, __const__ unsigned long * addr)
+{
+        int                     mask;
+        __const__ unsigned char *ADDR = (__const__ unsigned char *) addr;
+
+        ADDR += nr >> 3;
+        mask = 1 << (nr & 0x07);
+        return ((mask & *ADDR) != 0);
+}
+
+#define find_first_zero_le_bit(addr, size) \
+        find_next_zero_le_bit((addr), (size), 0)
+
+extern unsigned long find_next_zero_le_bit(unsigned long *, unsigned long, unsigned long);
+
+#ifdef __KERNEL__
+
+#define __set_le_bit(nr, addr) \
+        __set_bit((nr) ^ 0x38, (addr))
+#define __clear_le_bit(nr, addr) \
+        __clear_bit((nr) ^ 0x38, (addr))
+#define __test_and_clear_le_bit(nr, addr) \
+        __test_and_clear_bit((nr) ^ 0x38, (addr))
+#define __test_and_set_le_bit(nr, addr) \
+        __test_and_set_bit((nr) ^ 0x38, (addr))
+
+#define ext2_set_bit(nr,addr)   \
+        __test_and_set_le_bit((nr),(unsigned long *)(addr))
+#define ext2_set_bit_atomic(lock,nr,addr) \
+        test_and_set_le_bit((nr),(unsigned long *)(addr))
+#define ext2_clear_bit(nr,addr) \
+        __test_and_clear_le_bit((nr),(unsigned long *)(addr))
+#define ext2_clear_bit_atomic(lock,nr,addr) \
+        test_and_clear_le_bit((nr),(unsigned long *)(addr))
+#define ext2_test_bit(nr,addr)  \
+        test_le_bit((nr),(unsigned long *)(addr))
+#define ext2_find_first_zero_bit(addr, size) \
+        find_first_zero_le_bit((unsigned long *)(addr), (size))
+#define ext2_find_next_zero_bit(addr, size, off) \
+        find_next_zero_le_bit((unsigned long *)(addr), (size), (off))
+
+/* Bitmap functions for the minix filesystem.  */
+#define minix_test_and_set_bit(nr,addr) \
+        test_and_set_bit((nr),(unsigned long *)(addr))
+#define minix_set_bit(nr,addr)  \
+        set_bit((nr),(unsigned long *)(addr))
+#define minix_test_and_clear_bit(nr,addr) \
+        test_and_clear_bit((nr),(unsigned long *)(addr))
+#define minix_test_bit(nr,addr) \
+        test_bit((nr),(unsigned long *)(addr))
+#define minix_find_first_zero_bit(addr,size) \
+        find_first_zero_bit((unsigned long *)(addr),(size))
+
+#endif /* __KERNEL__ */
+
+#endif /* defined(_SPARC64_BITOPS_H) */