1/* SPDX-License-Identifier: GPL-2.0 */
2// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
3
4#ifndef __ASM_CSKY_BITOPS_H
5#define __ASM_CSKY_BITOPS_H
6
7#include <linux/compiler.h>
8#include <asm/barrier.h>
9
10/*
11 * asm-generic/bitops/ffs.h
12 */
13static inline int ffs(int x)
14{
15	if (!x)
16		return 0;
17
18	asm volatile (
19		"brev %0\n"
20		"ff1  %0\n"
21		"addi %0, 1\n"
22		: "=&r"(x)
23		: "0"(x));
24	return x;
25}
26
27/*
28 * asm-generic/bitops/__ffs.h
29 */
30static __always_inline unsigned long __ffs(unsigned long x)
31{
32	asm volatile (
33		"brev %0\n"
34		"ff1  %0\n"
35		: "=&r"(x)
36		: "0"(x));
37	return x;
38}
39
40/*
41 * asm-generic/bitops/fls.h
42 */
43static __always_inline int fls(unsigned int x)
44{
45	asm volatile(
46		"ff1 %0\n"
47		: "=&r"(x)
48		: "0"(x));
49
50	return (32 - x);
51}
52
53/*
54 * asm-generic/bitops/__fls.h
55 */
56static __always_inline unsigned long __fls(unsigned long x)
57{
58	return fls(x) - 1;
59}
60
61#include <asm-generic/bitops/ffz.h>
62#include <asm-generic/bitops/fls64.h>
63#include <asm-generic/bitops/find.h>
64
65#ifndef _LINUX_BITOPS_H
66#error only <linux/bitops.h> can be included directly
67#endif
68
69#include <asm-generic/bitops/sched.h>
70#include <asm-generic/bitops/hweight.h>
71#include <asm-generic/bitops/lock.h>
72#include <asm-generic/bitops/atomic.h>
73
74/*
75 * bug fix, why only could use atomic!!!!
76 */
77#include <asm-generic/bitops/non-atomic.h>
78#define __clear_bit(nr, vaddr) clear_bit(nr, vaddr)
79
80#include <asm-generic/bitops/le.h>
81#include <asm-generic/bitops/ext2-atomic.h>
82#endif /* __ASM_CSKY_BITOPS_H */
83