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authorIngo Molnar <mingo@elte.hu>2009-01-10 06:04:41 -0500
committerIngo Molnar <mingo@elte.hu>2009-01-10 06:04:41 -0500
commitb17304245f0db0ac69b795c411407808f3f2796d (patch)
tree63ed3915d9295bd08f640bf25c322064ba787fad /include/asm-xtensa/bitops.h
parent889c92d21db40be0b7d22a59395060237895bb85 (diff)
parent9a100a4464917b5ffff3a8ce1c2758088fd9bb32 (diff)
Merge branch 'linus' into x86/setup-lzma
Conflicts: init/do_mounts_rd.c
Diffstat (limited to 'include/asm-xtensa/bitops.h')
-rw-r--r--include/asm-xtensa/bitops.h132
1 files changed, 0 insertions, 132 deletions
diff --git a/include/asm-xtensa/bitops.h b/include/asm-xtensa/bitops.h
deleted file mode 100644
index 6c3930397bd3..000000000000
--- a/include/asm-xtensa/bitops.h
+++ /dev/null
@@ -1,132 +0,0 @@
1/*
2 * include/asm-xtensa/bitops.h
3 *
4 * Atomic operations that C can't guarantee us.Useful for resource counting etc.
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 *
10 * Copyright (C) 2001 - 2007 Tensilica Inc.
11 */
12
13#ifndef _XTENSA_BITOPS_H
14#define _XTENSA_BITOPS_H
15
16#ifdef __KERNEL__
17
18#ifndef _LINUX_BITOPS_H
19#error only <linux/bitops.h> can be included directly
20#endif
21
22#include <asm/processor.h>
23#include <asm/byteorder.h>
24#include <asm/system.h>
25
26#ifdef CONFIG_SMP
27# error SMP not supported on this architecture
28#endif
29
30#define smp_mb__before_clear_bit() barrier()
31#define smp_mb__after_clear_bit() barrier()
32
33#include <asm-generic/bitops/atomic.h>
34#include <asm-generic/bitops/non-atomic.h>
35
36#if XCHAL_HAVE_NSA
37
38static inline unsigned long __cntlz (unsigned long x)
39{
40 int lz;
41 asm ("nsau %0, %1" : "=r" (lz) : "r" (x));
42 return lz;
43}
44
45/*
46 * ffz: Find first zero in word. Undefined if no zero exists.
47 * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
48 */
49
50static inline int ffz(unsigned long x)
51{
52 return 31 - __cntlz(~x & -~x);
53}
54
55/*
56 * __ffs: Find first bit set in word. Return 0 for bit 0
57 */
58
59static inline int __ffs(unsigned long x)
60{
61 return 31 - __cntlz(x & -x);
62}
63
64/*
65 * ffs: Find first bit set in word. This is defined the same way as
66 * the libc and compiler builtin ffs routines, therefore
67 * differs in spirit from the above ffz (man ffs).
68 */
69
70static inline int ffs(unsigned long x)
71{
72 return 32 - __cntlz(x & -x);
73}
74
75/*
76 * fls: Find last (most-significant) bit set in word.
77 * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
78 */
79
80static inline int fls (unsigned int x)
81{
82 return 32 - __cntlz(x);
83}
84
85/**
86 * __fls - find last (most-significant) set bit in a long word
87 * @word: the word to search
88 *
89 * Undefined if no set bit exists, so code should check against 0 first.
90 */
91static inline unsigned long __fls(unsigned long word)
92{
93 return 31 - __cntlz(word);
94}
95#else
96
97/* Use the generic implementation if we don't have the nsa/nsau instructions. */
98
99# include <asm-generic/bitops/ffs.h>
100# include <asm-generic/bitops/__ffs.h>
101# include <asm-generic/bitops/ffz.h>
102# include <asm-generic/bitops/fls.h>
103# include <asm-generic/bitops/__fls.h>
104
105#endif
106
107#include <asm-generic/bitops/fls64.h>
108#include <asm-generic/bitops/find.h>
109#include <asm-generic/bitops/ext2-non-atomic.h>
110
111#ifdef __XTENSA_EL__
112# define ext2_set_bit_atomic(lock,nr,addr) \
113 test_and_set_bit((nr), (unsigned long*)(addr))
114# define ext2_clear_bit_atomic(lock,nr,addr) \
115 test_and_clear_bit((nr), (unsigned long*)(addr))
116#elif defined(__XTENSA_EB__)
117# define ext2_set_bit_atomic(lock,nr,addr) \
118 test_and_set_bit((nr) ^ 0x18, (unsigned long*)(addr))
119# define ext2_clear_bit_atomic(lock,nr,addr) \
120 test_and_clear_bit((nr) ^ 0x18, (unsigned long*)(addr))
121#else
122# error processor byte order undefined!
123#endif
124
125#include <asm-generic/bitops/hweight.h>
126#include <asm-generic/bitops/lock.h>
127#include <asm-generic/bitops/sched.h>
128#include <asm-generic/bitops/minix.h>
129
130#endif /* __KERNEL__ */
131
132#endif /* _XTENSA_BITOPS_H */