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/*
* arch/ubicom32/include/asm/bitops.h
* Bit manipulation definitions for Ubicom32 architecture.
*
* (C) Copyright 2009, Ubicom, Inc.
*
* This file is part of the Ubicom32 Linux Kernel Port.
*
* The Ubicom32 Linux Kernel Port is free software: you can redistribute
* it and/or modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, either version 2 of the
* License, or (at your option) any later version.
*
* The Ubicom32 Linux Kernel Port is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the Ubicom32 Linux Kernel Port. If not,
* see <http://www.gnu.org/licenses/>.
*
* Ubicom32 implementation derived from (with many thanks):
* arch/m68knommu
* arch/blackfin
* arch/parisc
*/
#ifndef _ASM_UBICOM32_BITOPS_H
#define _ASM_UBICOM32_BITOPS_H
/*
* Copyright 1992, Linus Torvalds.
*/
#include <linux/compiler.h>
#include <asm/byteorder.h> /* swab32 */
#ifdef __KERNEL__
#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
#endif
#include <asm-generic/bitops/ffs.h>
#include <asm-generic/bitops/__ffs.h>
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/ffz.h>
#include <asm/ubicom32-common.h>
static inline void set_bit(int bit, volatile unsigned long *p)
{
unsigned long mask = 1UL << (bit & 31);
p += bit >> 5;
__atomic_lock_acquire();
*p |= mask;
__atomic_lock_release();
}
static inline void clear_bit(int bit, volatile unsigned long *p)
{
unsigned long mask = 1UL << (bit & 31);
p += bit >> 5;
__atomic_lock_acquire();
*p &= ~mask;
__atomic_lock_release();
}
/*
* 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 change_bit(int bit, volatile unsigned long *p)
{
unsigned long mask = 1UL << (bit & 31);
p += bit >> 5;
__atomic_lock_acquire();
*p ^= mask;
__atomic_lock_release();
}
static inline int test_and_set_bit(int bit, volatile unsigned long *p)
{
unsigned int res;
unsigned long mask = 1UL << (bit & 31);
p += bit >> 5;
__atomic_lock_acquire();
res = *p;
*p = res | mask;
__atomic_lock_release();
return res & mask;
}
static inline int test_and_clear_bit(int bit, volatile unsigned long *p)
{
unsigned int res;
unsigned long mask = 1UL << (bit & 31);
p += bit >> 5;
__atomic_lock_acquire();
res = *p;
*p = res & ~mask;
__atomic_lock_release();
return res & mask;
}
static inline int test_and_change_bit(int bit, volatile unsigned long *p)
{
unsigned int res;
unsigned long mask = 1UL << (bit & 31);
p += bit >> 5;
__atomic_lock_acquire();
res = *p;
*p = res ^ mask;
__atomic_lock_release();
return res & mask;
}
#include <asm-generic/bitops/non-atomic.h>
/*
* This routine doesn't need to be atomic.
*/
static inline int __constant_test_bit(int nr, const volatile unsigned long *addr)
{
return ((1UL << (nr & 31)) & (((const volatile unsigned int *) addr)[nr >> 5])) != 0;
}
static inline int __test_bit(int nr, const volatile unsigned long *addr)
{
int * a = (int *) addr;
int mask;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
return ((mask & *a) != 0);
}
#define test_bit(nr,addr) (__builtin_constant_p(nr) ? __constant_test_bit((nr),(addr)) : __test_bit((nr),(addr)))
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/lock.h>
#include <asm-generic/bitops/ext2-non-atomic.h>
#include <asm-generic/bitops/ext2-atomic.h>
#include <asm-generic/bitops/minix.h>
#endif /* __KERNEL__ */
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#endif /* _ASM_UBICOM32_BITOPS_H */
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