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authorFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>2012-05-27 16:58:20 -0400
committerFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>2012-05-27 16:58:20 -0400
commitd85d135d8babbc917b370f36cbc02b7b4a2f2d99 (patch)
tree2f06e02940d87099670aa31459ad1ab41a1ca036 /arch/ia64/include/asm/cmpxchg.h
parent5e7b911f9a3e582635801675b7fe935b16cd4af5 (diff)
parente92a5b28f71aea01b281f9c89d97a4bc5b24748f (diff)
Merge tag 'omapdss-for-3.5' of git://github.com/tomba/linux into fbdev-next
Omapdss driver changes for 3.5 merge window. Lots of normal development commits, but perhaps most notable changes are: * HDMI rework to properly decouple the HDMI audio part from the HDMI video part. * Restructure omapdss core driver so that it's possible to implement device tree support. This included changing how platform data is passed to the drivers, changing display device registration and improving the panel driver's ability to configure the underlying video output interface. * Basic support for DSI packet interleaving
Diffstat (limited to 'arch/ia64/include/asm/cmpxchg.h')
-rw-r--r--arch/ia64/include/asm/cmpxchg.h148
1 files changed, 147 insertions, 1 deletions
diff --git a/arch/ia64/include/asm/cmpxchg.h b/arch/ia64/include/asm/cmpxchg.h
index 4c96187e204..4f37dbbb864 100644
--- a/arch/ia64/include/asm/cmpxchg.h
+++ b/arch/ia64/include/asm/cmpxchg.h
@@ -1 +1,147 @@
1#include <asm/intrinsics.h> 1#ifndef _ASM_IA64_CMPXCHG_H
2#define _ASM_IA64_CMPXCHG_H
3
4/*
5 * Compare/Exchange, forked from asm/intrinsics.h
6 * which was:
7 *
8 * Copyright (C) 2002-2003 Hewlett-Packard Co
9 * David Mosberger-Tang <davidm@hpl.hp.com>
10 */
11
12#ifndef __ASSEMBLY__
13
14#include <linux/types.h>
15/* include compiler specific intrinsics */
16#include <asm/ia64regs.h>
17#ifdef __INTEL_COMPILER
18# include <asm/intel_intrin.h>
19#else
20# include <asm/gcc_intrin.h>
21#endif
22
23/*
24 * This function doesn't exist, so you'll get a linker error if
25 * something tries to do an invalid xchg().
26 */
27extern void ia64_xchg_called_with_bad_pointer(void);
28
29#define __xchg(x, ptr, size) \
30({ \
31 unsigned long __xchg_result; \
32 \
33 switch (size) { \
34 case 1: \
35 __xchg_result = ia64_xchg1((__u8 *)ptr, x); \
36 break; \
37 \
38 case 2: \
39 __xchg_result = ia64_xchg2((__u16 *)ptr, x); \
40 break; \
41 \
42 case 4: \
43 __xchg_result = ia64_xchg4((__u32 *)ptr, x); \
44 break; \
45 \
46 case 8: \
47 __xchg_result = ia64_xchg8((__u64 *)ptr, x); \
48 break; \
49 default: \
50 ia64_xchg_called_with_bad_pointer(); \
51 } \
52 __xchg_result; \
53})
54
55#define xchg(ptr, x) \
56((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr))))
57
58/*
59 * Atomic compare and exchange. Compare OLD with MEM, if identical,
60 * store NEW in MEM. Return the initial value in MEM. Success is
61 * indicated by comparing RETURN with OLD.
62 */
63
64#define __HAVE_ARCH_CMPXCHG 1
65
66/*
67 * This function doesn't exist, so you'll get a linker error
68 * if something tries to do an invalid cmpxchg().
69 */
70extern long ia64_cmpxchg_called_with_bad_pointer(void);
71
72#define ia64_cmpxchg(sem, ptr, old, new, size) \
73({ \
74 __u64 _o_, _r_; \
75 \
76 switch (size) { \
77 case 1: \
78 _o_ = (__u8) (long) (old); \
79 break; \
80 case 2: \
81 _o_ = (__u16) (long) (old); \
82 break; \
83 case 4: \
84 _o_ = (__u32) (long) (old); \
85 break; \
86 case 8: \
87 _o_ = (__u64) (long) (old); \
88 break; \
89 default: \
90 break; \
91 } \
92 switch (size) { \
93 case 1: \
94 _r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_); \
95 break; \
96 \
97 case 2: \
98 _r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_); \
99 break; \
100 \
101 case 4: \
102 _r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_); \
103 break; \
104 \
105 case 8: \
106 _r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); \
107 break; \
108 \
109 default: \
110 _r_ = ia64_cmpxchg_called_with_bad_pointer(); \
111 break; \
112 } \
113 (__typeof__(old)) _r_; \
114})
115
116#define cmpxchg_acq(ptr, o, n) \
117 ia64_cmpxchg(acq, (ptr), (o), (n), sizeof(*(ptr)))
118#define cmpxchg_rel(ptr, o, n) \
119 ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr)))
120
121/* for compatibility with other platforms: */
122#define cmpxchg(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
123#define cmpxchg64(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
124
125#define cmpxchg_local cmpxchg
126#define cmpxchg64_local cmpxchg64
127
128#ifdef CONFIG_IA64_DEBUG_CMPXCHG
129# define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128;
130# define CMPXCHG_BUGCHECK(v) \
131do { \
132 if (_cmpxchg_bugcheck_count-- <= 0) { \
133 void *ip; \
134 extern int printk(const char *fmt, ...); \
135 ip = (void *) ia64_getreg(_IA64_REG_IP); \
136 printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v));\
137 break; \
138 } \
139} while (0)
140#else /* !CONFIG_IA64_DEBUG_CMPXCHG */
141# define CMPXCHG_BUGCHECK_DECL
142# define CMPXCHG_BUGCHECK(v)
143#endif /* !CONFIG_IA64_DEBUG_CMPXCHG */
144
145#endif /* !__ASSEMBLY__ */
146
147#endif /* _ASM_IA64_CMPXCHG_H */
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