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Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/include/asm/bitops.h')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/include/asm/bitops.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/include/asm/bitops.h b/target/linux/ubicom32/files/arch/ubicom32/include/asm/bitops.h new file mode 100644 index 000000000..c63837b2e --- /dev/null +++ b/target/linux/ubicom32/files/arch/ubicom32/include/asm/bitops.h @@ -0,0 +1,172 @@ +/* + * 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 */ |