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authorChris Zankel <chris@zankel.net>2008-11-06 09:40:46 -0500
committerChris Zankel <chris@zankel.net>2008-11-06 13:25:09 -0500
commit367b8112fe2ea5c39a7bb4d263dcdd9b612fae18 (patch)
tree9f3349189718dd2c5678faf0ab38f389786b6925 /include/asm-xtensa/bitops.h
parent206ead28377fee86b129637edada8c77816cc0d6 (diff)
xtensa: move headers files to arch/xtensa/include
Move all header files for xtensa to arch/xtensa/include and platform and variant header files to the appropriate arch/xtensa/platforms/ and arch/xtensa/variants/ directories. Moving the files gets also rid of all uses of symlinks in the Makefile. This has been completed already for the majority of the architectures and xtensa is one out of six missing. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'include/asm-xtensa/bitops.h')
-rw-r--r--include/asm-xtensa/bitops.h121
1 files changed, 0 insertions, 121 deletions
diff --git a/include/asm-xtensa/bitops.h b/include/asm-xtensa/bitops.h
deleted file mode 100644
index 23261e8f2e5a..000000000000
--- a/include/asm-xtensa/bitops.h
+++ /dev/null
@@ -1,121 +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#else
86
87/* Use the generic implementation if we don't have the nsa/nsau instructions. */
88
89# include <asm-generic/bitops/ffs.h>
90# include <asm-generic/bitops/__ffs.h>
91# include <asm-generic/bitops/ffz.h>
92# include <asm-generic/bitops/fls.h>
93
94#endif
95
96#include <asm-generic/bitops/fls64.h>
97#include <asm-generic/bitops/find.h>
98#include <asm-generic/bitops/ext2-non-atomic.h>
99
100#ifdef __XTENSA_EL__
101# define ext2_set_bit_atomic(lock,nr,addr) \
102 test_and_set_bit((nr), (unsigned long*)(addr))
103# define ext2_clear_bit_atomic(lock,nr,addr) \
104 test_and_clear_bit((nr), (unsigned long*)(addr))
105#elif defined(__XTENSA_EB__)
106# define ext2_set_bit_atomic(lock,nr,addr) \
107 test_and_set_bit((nr) ^ 0x18, (unsigned long*)(addr))
108# define ext2_clear_bit_atomic(lock,nr,addr) \
109 test_and_clear_bit((nr) ^ 0x18, (unsigned long*)(addr))
110#else
111# error processor byte order undefined!
112#endif
113
114#include <asm-generic/bitops/hweight.h>
115#include <asm-generic/bitops/lock.h>
116#include <asm-generic/bitops/sched.h>
117#include <asm-generic/bitops/minix.h>
118
119#endif /* __KERNEL__ */
120
121#endif /* _XTENSA_BITOPS_H */