1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (C) 2001 - 2012 Tensilica Inc. 4 * Copyright (C) 2014 - 2016 Cadence Design Systems Inc. 5 */ 6 7 #ifndef _XTENSA_BITOPS_H 8 #define _XTENSA_BITOPS_H 9 10 #include <asm/system.h> 11 #include <asm-generic/bitops/fls.h> 12 #include <asm-generic/bitops/__fls.h> 13 #include <asm-generic/bitops/fls64.h> 14 #include <asm-generic/bitops/__ffs.h> 15 16 static inline int test_bit(int nr, const void *addr) 17 { 18 return ((unsigned char *)addr)[nr >> 3] & (1u << (nr & 7)); 19 } 20 21 static inline int test_and_set_bit(int nr, volatile void *addr) 22 { 23 unsigned long flags; 24 unsigned char tmp; 25 unsigned char mask = 1u << (nr & 7); 26 27 local_irq_save(flags); 28 tmp = ((unsigned char *)addr)[nr >> 3]; 29 ((unsigned char *)addr)[nr >> 3] |= mask; 30 local_irq_restore(flags); 31 32 return tmp & mask; 33 } 34 35 #endif /* _XTENSA_BITOPS_H */ 36
