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-rw-r--r--arch/ia64/include/asm/bitops.h456
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diff --git a/arch/ia64/include/asm/bitops.h b/arch/ia64/include/asm/bitops.h
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--- a/arch/ia64/include/asm/bitops.h
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-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_IA64_BITOPS_H
-#define _ASM_IA64_BITOPS_H
-
-/*
- * Copyright (C) 1998-2003 Hewlett-Packard Co
- * David Mosberger-Tang <davidm@hpl.hp.com>
- *
- * 02/06/02 find_next_bit() and find_first_bit() added from Erich Focht's ia64
- * O(1) scheduler patch
- */
-
-#ifndef _LINUX_BITOPS_H
-#error only <linux/bitops.h> can be included directly
-#endif
-
-#include <linux/compiler.h>
-#include <linux/types.h>
-#include <asm/intrinsics.h>
-#include <asm/barrier.h>
-
-/**
- * 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.
- *
- * The address must be (at least) "long" aligned.
- * Note that there are driver (e.g., eepro100) which use these operations to
- * operate on hw-defined data-structures, so we can't easily change these
- * operations to force a bigger alignment.
- *
- * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
- */
-static __inline__ void
-set_bit (int nr, volatile void *addr)
-{
- __u32 bit, old, new;
- volatile __u32 *m;
- CMPXCHG_BUGCHECK_DECL
-
- m = (volatile __u32 *) addr + (nr >> 5);
- bit = 1 << (nr & 31);
- do {
- CMPXCHG_BUGCHECK(m);
- old = *m;
- new = old | bit;
- } while (cmpxchg_acq(m, old, new) != old);
-}
-
-/**
- * __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)
-{
- *((__u32 *) addr + (nr >> 5)) |= (1 << (nr & 31));
-}
-
-/**
- * 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_atomic() and/or smp_mb__after_atomic()
- * in order to ensure changes are visible on other processors.
- */
-static __inline__ void
-clear_bit (int nr, volatile void *addr)
-{
- __u32 mask, old, new;
- volatile __u32 *m;
- CMPXCHG_BUGCHECK_DECL
-
- m = (volatile __u32 *) addr + (nr >> 5);
- mask = ~(1 << (nr & 31));
- do {
- CMPXCHG_BUGCHECK(m);
- old = *m;
- new = old & mask;
- } while (cmpxchg_acq(m, old, new) != old);
-}
-
-/**
- * clear_bit_unlock - Clears a bit in memory with release
- * @nr: Bit to clear
- * @addr: Address to start counting from
- *
- * clear_bit_unlock() is atomic and may not be reordered. It does
- * contain a memory barrier suitable for unlock type operations.
- */
-static __inline__ void
-clear_bit_unlock (int nr, volatile void *addr)
-{
- __u32 mask, old, new;
- volatile __u32 *m;
- CMPXCHG_BUGCHECK_DECL
-
- m = (volatile __u32 *) addr + (nr >> 5);
- mask = ~(1 << (nr & 31));
- do {
- CMPXCHG_BUGCHECK(m);
- old = *m;
- new = old & mask;
- } while (cmpxchg_rel(m, old, new) != old);
-}
-
-/**
- * __clear_bit_unlock - Non-atomically clears a bit in memory with release
- * @nr: Bit to clear
- * @addr: Address to start counting from
- *
- * Similarly to clear_bit_unlock, the implementation uses a store
- * with release semantics. See also arch_spin_unlock().
- */
-static __inline__ void
-__clear_bit_unlock(int nr, void *addr)
-{
- __u32 * const m = (__u32 *) addr + (nr >> 5);
- __u32 const new = *m & ~(1 << (nr & 31));
-
- ia64_st4_rel_nta(m, new);
-}
-
-/**
- * __clear_bit - Clears a bit in memory (non-atomic version)
- * @nr: the bit to clear
- * @addr: the address to start counting from
- *
- * Unlike clear_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
-__clear_bit (int nr, volatile void *addr)
-{
- *((__u32 *) addr + (nr >> 5)) &= ~(1 << (nr & 31));
-}
-
-/**
- * change_bit - Toggle a bit in memory
- * @nr: Bit to toggle
- * @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)
-{
- __u32 bit, old, new;
- volatile __u32 *m;
- CMPXCHG_BUGCHECK_DECL
-
- m = (volatile __u32 *) addr + (nr >> 5);
- bit = (1 << (nr & 31));
- do {
- CMPXCHG_BUGCHECK(m);
- old = *m;
- new = old ^ bit;
- } while (cmpxchg_acq(m, old, new) != old);
-}
-
-/**
- * __change_bit - Toggle a bit in memory
- * @nr: the bit to toggle
- * @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)
-{
- *((__u32 *) addr + (nr >> 5)) ^= (1 << (nr & 31));
-}
-
-/**
- * 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 the acquisition side of the memory barrier.
- */
-static __inline__ int
-test_and_set_bit (int nr, volatile void *addr)
-{
- __u32 bit, old, new;
- volatile __u32 *m;
- CMPXCHG_BUGCHECK_DECL
-
- m = (volatile __u32 *) addr + (nr >> 5);
- bit = 1 << (nr & 31);
- do {
- CMPXCHG_BUGCHECK(m);
- old = *m;
- new = old | bit;
- } while (cmpxchg_acq(m, old, new) != old);
- return (old & bit) != 0;
-}
-
-/**
- * test_and_set_bit_lock - Set a bit and return its old value for lock
- * @nr: Bit to set
- * @addr: Address to count from
- *
- * This is the same as test_and_set_bit on ia64
- */
-#define test_and_set_bit_lock test_and_set_bit
-
-/**
- * __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)
-{
- __u32 *p = (__u32 *) addr + (nr >> 5);
- __u32 m = 1 << (nr & 31);
- int oldbitset = (*p & m) != 0;
-
- *p |= m;
- return oldbitset;
-}
-
-/**
- * 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 the acquisition side of the memory barrier.
- */
-static __inline__ int
-test_and_clear_bit (int nr, volatile void *addr)
-{
- __u32 mask, old, new;
- volatile __u32 *m;
- CMPXCHG_BUGCHECK_DECL
-
- m = (volatile __u32 *) addr + (nr >> 5);
- mask = ~(1 << (nr & 31));
- do {
- CMPXCHG_BUGCHECK(m);
- old = *m;
- new = old & mask;
- } while (cmpxchg_acq(m, old, new) != old);
- return (old & ~mask) != 0;
-}
-
-/**
- * __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)
-{
- __u32 *p = (__u32 *) addr + (nr >> 5);
- __u32 m = 1 << (nr & 31);
- int oldbitset = (*p & m) != 0;
-
- *p &= ~m;
- return oldbitset;
-}
-
-/**
- * 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 the acquisition side of the memory barrier.
- */
-static __inline__ int
-test_and_change_bit (int nr, volatile void *addr)
-{
- __u32 bit, old, new;
- volatile __u32 *m;
- CMPXCHG_BUGCHECK_DECL
-
- m = (volatile __u32 *) addr + (nr >> 5);
- bit = (1 << (nr & 31));
- do {
- CMPXCHG_BUGCHECK(m);
- old = *m;
- new = old ^ bit;
- } while (cmpxchg_acq(m, old, new) != old);
- return (old & bit) != 0;
-}
-
-/**
- * __test_and_change_bit - Change a bit and return its old value
- * @nr: Bit to change
- * @addr: Address to count from
- *
- * This operation is non-atomic and can be reordered.
- */
-static __inline__ int
-__test_and_change_bit (int nr, void *addr)
-{
- __u32 old, bit = (1 << (nr & 31));
- __u32 *m = (__u32 *) addr + (nr >> 5);
-
- old = *m;
- *m = old ^ bit;
- return (old & bit) != 0;
-}
-
-static __inline__ int
-test_bit (int nr, const volatile void *addr)
-{
- return 1 & (((const volatile __u32 *) addr)[nr >> 5] >> (nr & 31));
-}
-
-/**
- * ffz - find the first zero bit in a long word
- * @x: The long word to find the bit in
- *
- * Returns the bit-number (0..63) of the first (least significant) zero bit.
- * Undefined if no zero exists, so code should check against ~0UL first...
- */
-static inline unsigned long
-ffz (unsigned long x)
-{
- unsigned long result;
-
- result = ia64_popcnt(x & (~x - 1));
- return result;
-}
-
-/**
- * __ffs - find first bit in word.
- * @x: The word to search
- *
- * Undefined if no bit exists, so code should check against 0 first.
- */
-static __inline__ unsigned long
-__ffs (unsigned long x)
-{
- unsigned long result;
-
- result = ia64_popcnt((x-1) & ~x);
- return result;
-}
-
-#ifdef __KERNEL__
-
-/*
- * Return bit number of last (most-significant) bit set. Undefined
- * for x==0. Bits are numbered from 0..63 (e.g., ia64_fls(9) == 3).
- */
-static inline unsigned long
-ia64_fls (unsigned long x)
-{
- long double d = x;
- long exp;
-
- exp = ia64_getf_exp(d);
- return exp - 0xffff;
-}
-
-/*
- * Find the last (most significant) bit set. Returns 0 for x==0 and
- * bits are numbered from 1..32 (e.g., fls(9) == 4).
- */
-static inline int fls(unsigned int t)
-{
- unsigned long x = t & 0xffffffffu;
-
- if (!x)
- return 0;
- x |= x >> 1;
- x |= x >> 2;
- x |= x >> 4;
- x |= x >> 8;
- x |= x >> 16;
- return ia64_popcnt(x);
-}
-
-/*
- * Find the last (most significant) bit set. Undefined for x==0.
- * Bits are numbered from 0..63 (e.g., __fls(9) == 3).
- */
-static inline unsigned long
-__fls (unsigned long x)
-{
- x |= x >> 1;
- x |= x >> 2;
- x |= x >> 4;
- x |= x >> 8;
- x |= x >> 16;
- x |= x >> 32;
- return ia64_popcnt(x) - 1;
-}
-
-#include <asm-generic/bitops/fls64.h>
-
-#include <asm-generic/bitops/builtin-ffs.h>
-
-/*
- * hweightN: returns the hamming weight (i.e. the number
- * of bits set) of a N-bit word
- */
-static __inline__ unsigned long __arch_hweight64(unsigned long x)
-{
- unsigned long result;
- result = ia64_popcnt(x);
- return result;
-}
-
-#define __arch_hweight32(x) ((unsigned int) __arch_hweight64((x) & 0xfffffffful))
-#define __arch_hweight16(x) ((unsigned int) __arch_hweight64((x) & 0xfffful))
-#define __arch_hweight8(x) ((unsigned int) __arch_hweight64((x) & 0xfful))
-
-#include <asm-generic/bitops/const_hweight.h>
-
-#endif /* __KERNEL__ */
-
-#include <asm-generic/bitops/find.h>
-
-#ifdef __KERNEL__
-
-#include <asm-generic/bitops/le.h>
-
-#include <asm-generic/bitops/ext2-atomic-setbit.h>
-
-#include <asm-generic/bitops/sched.h>
-
-#endif /* __KERNEL__ */
-
-#endif /* _ASM_IA64_BITOPS_H */