diff options
Diffstat (limited to 'arch/m68k/include/asm/bitops.h')
| -rw-r--r-- | arch/m68k/include/asm/bitops.h | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h deleted file mode 100644 index fee64a425c..0000000000 --- a/arch/m68k/include/asm/bitops.h +++ /dev/null @@ -1,141 +0,0 @@ -/* - * Copyright (c) 2008 Carsten Schlote <c.schlote@konzeptpark.de> - * See file CREDITS for list of people who contributed to this project. - * - * This file is part of barebox. - * - * barebox 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 3 of the License, or - * (at your option) any later version. - * - * barebox 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 barebox. If not, see <http://www.gnu.org/licenses/>. - */ - -/** @file - * Bitops helper functions and defines for M68k - * - * bit 0 is the LSB of addr; bit 32 is the HSB. - * - * Please note that the code in this file should never be included - * from user space. Many of these are not implemented in assembler - * since they would be too costly. Also, they require priviledged - * instructions (which are not available from user mode) to ensure - * that they are atomic. - */ - -#ifndef __ASM_M68K_BITOPS_H -#define __ASM_M68K_BITOPS_H - -/* - * Function prototypes to keep gcc -Wall happy. - */ -extern void set_bit(int nr, volatile void * addr); - -static inline void __set_bit(int nr, volatile void *addr) -{ - ((unsigned char *) addr)[nr >> 3] |= (1U << (nr & 7)); -} - -extern void clear_bit(int nr, volatile void * addr); - -static inline void __clear_bit(int nr, volatile void *addr) -{ - ((unsigned char *) addr)[nr >> 3] &= ~(1U << (nr & 7)); -} - -extern void change_bit(int nr, volatile void * addr); - -static inline void __change_bit(int nr, volatile void *addr) -{ - ((unsigned char *) addr)[nr >> 3] ^= (1U << (nr & 7)); -} - -extern int test_and_set_bit(int nr, volatile void * addr); - -static inline int __test_and_set_bit(int nr, volatile void *addr) -{ - unsigned int mask = 1 << (nr & 7); - unsigned int oldval; - - oldval = ((unsigned char *) addr)[nr >> 3]; - ((unsigned char *) addr)[nr >> 3] = oldval | mask; - return oldval & mask; -} - -extern int test_and_clear_bit(int nr, volatile void * addr); - -static inline int __test_and_clear_bit(int nr, volatile void *addr) -{ - unsigned int mask = 1 << (nr & 7); - unsigned int oldval; - - oldval = ((unsigned char *) addr)[nr >> 3]; - ((unsigned char *) addr)[nr >> 3] = oldval & ~mask; - return oldval & mask; -} - -extern int test_and_change_bit(int nr, volatile void * addr); - -static inline int __test_and_change_bit(int nr, volatile void *addr) -{ - unsigned int mask = 1 << (nr & 7); - unsigned int oldval; - - oldval = ((unsigned char *) addr)[nr >> 3]; - ((unsigned char *) addr)[nr >> 3] = oldval ^ mask; - return oldval & mask; -} - -extern int find_first_zero_bit(void * addr, unsigned size); -extern int find_next_zero_bit(void * addr, int size, int offset); - -/* - * This routine doesn't need to be atomic. - */ -static inline int test_bit(int nr, const void * addr) -{ - return ((unsigned char *) addr)[nr >> 3] & (1U << (nr & 7)); -} - -/* - * 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) -{ - int k; - - word = ~word; - k = 31; - if (word & 0x0000ffff) { k -= 16; word <<= 16; } - if (word & 0x00ff0000) { k -= 8; word <<= 8; } - if (word & 0x0f000000) { k -= 4; word <<= 4; } - if (word & 0x30000000) { k -= 2; word <<= 2; } - if (word & 0x40000000) { k -= 1; } - return k; -} - -#include <asm-generic/bitops/ffs.h> -#include <asm-generic/bitops/hweight.h> - -#define ext2_set_bit test_and_set_bit -#define ext2_clear_bit test_and_clear_bit -#define ext2_test_bit test_bit -#define ext2_find_first_zero_bit find_first_zero_bit -#define ext2_find_next_zero_bit find_next_zero_bit - -/* 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 /* __ASM_M68K_BITOPS_H */ |