xref: /openbmc/u-boot/arch/xtensa/include/asm/bitops.h (revision 6f94fa21cc7552dae9bf452e12eaa85c8897fcbb)
1  /*
2   * Copyright (C) 2001 - 2012 Tensilica Inc.
3   * Copyright (C) 2014 - 2016 Cadence Design Systems Inc.
4   *
5   * SPDX-License-Identifier:	GPL-2.0+
6   */
7  
8  #ifndef _XTENSA_BITOPS_H
9  #define _XTENSA_BITOPS_H
10  
11  #include <asm/system.h>
12  #include <asm-generic/bitops/fls.h>
13  #include <asm-generic/bitops/__fls.h>
14  #include <asm-generic/bitops/fls64.h>
15  #include <asm-generic/bitops/__ffs.h>
16  
17  static inline int test_bit(int nr, const void *addr)
18  {
19  	return ((unsigned char *)addr)[nr >> 3] & (1u << (nr & 7));
20  }
21  
22  static inline int test_and_set_bit(int nr, volatile void *addr)
23  {
24  	unsigned long flags;
25  	unsigned char tmp;
26  	unsigned char mask = 1u << (nr & 7);
27  
28  	local_irq_save(flags);
29  	tmp = ((unsigned char *)addr)[nr >> 3];
30  	((unsigned char *)addr)[nr >> 3] |= mask;
31  	local_irq_restore(flags);
32  
33  	return tmp & mask;
34  }
35  
36  #endif	/* _XTENSA_BITOPS_H */
37