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Diffstat (limited to 'include/asm-blackfin/bitops.h')
-rw-r--r-- | include/asm-blackfin/bitops.h | 371 |
1 files changed, 0 insertions, 371 deletions
diff --git a/include/asm-blackfin/bitops.h b/include/asm-blackfin/bitops.h deleted file mode 100644 index ab1fea5..0000000 --- a/include/asm-blackfin/bitops.h +++ /dev/null @@ -1,371 +0,0 @@ -/* - * U-boot - bitops.h Routines for bit operations - * - * Copyright (c) 2005-2007 Analog Devices Inc. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program 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. - * - * This program 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 this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, - * MA 02110-1301 USA - */ - -#ifndef _BLACKFIN_BITOPS_H -#define _BLACKFIN_BITOPS_H - -/* - * Copyright 1992, Linus Torvalds. - */ - -#include <linux/config.h> -#include <asm/byteorder.h> -#include <asm/system.h> - -#ifdef __KERNEL__ -/* - * Function prototypes to keep gcc -Wall happy - */ - -/* - * The __ functions are not atomic - */ - -/* - * ffz = Find First Zero in word. Undefined if no zero exists, - * so code should check against ~0UL first.. - */ -static __inline__ unsigned long ffz(unsigned long word) -{ - unsigned long result = 0; - - while (word & 1) { - result++; - word >>= 1; - } - return result; -} - -static __inline__ void set_bit(int nr, volatile void *addr) -{ - int *a = (int *)addr; - int mask; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - *a |= mask; - local_irq_restore(flags); -} - -static __inline__ void __set_bit(int nr, volatile void *addr) -{ - int *a = (int *)addr; - int mask; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - *a |= mask; -} -#define PLATFORM__SET_BIT - -/* - * 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 clear_bit(int nr, volatile void *addr) -{ - int *a = (int *)addr; - int mask; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - *a &= ~mask; - local_irq_restore(flags); -} - -static __inline__ void change_bit(int nr, volatile void *addr) -{ - int mask, flags; - unsigned long *ADDR = (unsigned long *)addr; - - ADDR += nr >> 5; - mask = 1 << (nr & 31); - local_irq_save(flags); - *ADDR ^= mask; - local_irq_restore(flags); -} - -static __inline__ void __change_bit(int nr, volatile void *addr) -{ - int mask; - unsigned long *ADDR = (unsigned long *)addr; - - ADDR += nr >> 5; - mask = 1 << (nr & 31); - *ADDR ^= mask; -} - -static __inline__ int test_and_set_bit(int nr, volatile void *addr) -{ - int mask, retval; - volatile unsigned int *a = (volatile unsigned int *)addr; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - retval = (mask & *a) != 0; - *a |= mask; - local_irq_restore(flags); - - return retval; -} - -static __inline__ int __test_and_set_bit(int nr, volatile void *addr) -{ - int mask, retval; - volatile unsigned int *a = (volatile unsigned int *)addr; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - retval = (mask & *a) != 0; - *a |= mask; - return retval; -} - -static __inline__ int test_and_clear_bit(int nr, volatile void *addr) -{ - int mask, retval; - volatile unsigned int *a = (volatile unsigned int *)addr; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - retval = (mask & *a) != 0; - *a &= ~mask; - local_irq_restore(flags); - - return retval; -} - -static __inline__ int __test_and_clear_bit(int nr, volatile void *addr) -{ - int mask, retval; - volatile unsigned int *a = (volatile unsigned int *)addr; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - retval = (mask & *a) != 0; - *a &= ~mask; - return retval; -} - -static __inline__ int test_and_change_bit(int nr, volatile void *addr) -{ - int mask, retval; - volatile unsigned int *a = (volatile unsigned int *)addr; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - retval = (mask & *a) != 0; - *a ^= mask; - local_irq_restore(flags); - - return retval; -} - -static __inline__ int __test_and_change_bit(int nr, volatile void *addr) -{ - int mask, retval; - volatile unsigned int *a = (volatile unsigned int *)addr; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - retval = (mask & *a) != 0; - *a ^= mask; - return retval; -} - -/* - * This routine doesn't need to be atomic. - */ -static __inline__ int __constant_test_bit(int nr, const volatile void *addr) -{ - return ((1UL << (nr & 31)) & - (((const volatile unsigned int *)addr)[nr >> 5])) != 0; -} - -static __inline__ int __test_bit(int nr, volatile void *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))) - -#define find_first_zero_bit(addr, size) \ - find_next_zero_bit((addr), (size), 0) - -static __inline__ int find_next_zero_bit(void *addr, int size, int offset) -{ - unsigned long *p = ((unsigned long *)addr) + (offset >> 5); - unsigned long result = offset & ~31UL; - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 31UL; - if (offset) { - tmp = *(p++); - tmp |= ~0UL >> (32 - offset); - if (size < 32) - goto found_first; - if (~tmp) - goto found_middle; - size -= 32; - result += 32; - } - while (size & ~31UL) { - if (~(tmp = *(p++))) - goto found_middle; - result += 32; - size -= 32; - } - if (!size) - return result; - tmp = *p; - - found_first: - tmp |= ~0UL >> size; - found_middle: - return result + ffz(tmp); -} - -/* - * hweightN: returns the hamming weight (i.e. the number - * of bits set) of a N-bit word - */ - -#define hweight32(x) generic_hweight32(x) -#define hweight16(x) generic_hweight16(x) -#define hweight8(x) generic_hweight8(x) - -static __inline__ int ext2_set_bit(int nr, volatile void *addr) -{ - int mask, retval; - unsigned long flags; - volatile unsigned char *ADDR = (unsigned char *)addr; - - ADDR += nr >> 3; - mask = 1 << (nr & 0x07); - local_irq_save(flags); - retval = (mask & *ADDR) != 0; - *ADDR |= mask; - local_irq_restore(flags); - return retval; -} - -static __inline__ int ext2_clear_bit(int nr, volatile void *addr) -{ - int mask, retval; - unsigned long flags; - volatile unsigned char *ADDR = (unsigned char *)addr; - - ADDR += nr >> 3; - mask = 1 << (nr & 0x07); - local_irq_save(flags); - retval = (mask & *ADDR) != 0; - *ADDR &= ~mask; - local_irq_restore(flags); - return retval; -} - -static __inline__ int ext2_test_bit(int nr, const volatile void *addr) -{ - int mask; - const volatile unsigned char *ADDR = (const unsigned char *)addr; - - ADDR += nr >> 3; - mask = 1 << (nr & 0x07); - return ((mask & *ADDR) != 0); -} - -#define ext2_find_first_zero_bit(addr, size) \ - ext2_find_next_zero_bit((addr), (size), 0) - -static __inline__ unsigned long ext2_find_next_zero_bit(void *addr, - unsigned long size, - unsigned long offset) -{ - unsigned long *p = ((unsigned long *)addr) + (offset >> 5); - unsigned long result = offset & ~31UL; - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 31UL; - if (offset) { - tmp = *(p++); - tmp |= ~0UL >> (32 - offset); - if (size < 32) - goto found_first; - if (~tmp) - goto found_middle; - size -= 32; - result += 32; - } - while (size & ~31UL) { - if (~(tmp = *(p++))) - goto found_middle; - result += 32; - size -= 32; - } - if (!size) - return result; - tmp = *p; - - found_first: - tmp |= ~0UL >> size; - found_middle: - return result + ffz(tmp); -} - -/* 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) - -#endif - -#endif |