aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ia64/include/asm/cmpxchg.h
diff options
context:
space:
mode:
authorDave Airlie <airlied@redhat.com>2012-05-02 04:21:50 -0400
committerDave Airlie <airlied@redhat.com>2012-05-02 04:22:29 -0400
commit5bc69bf9aeb73547cad8e1ce683a103fe9728282 (patch)
treed3ef275532fc4391cb645f8b4d45d39d7fbb73f4 /arch/ia64/include/asm/cmpxchg.h
parentc6543a6e64ad8e456674a1c4a01dd024e38b665f (diff)
parenta85d4bcb8a0cd5b3c754f98ff91ef2b9b3a73bc5 (diff)
Merge tag 'drm-intel-next-2012-04-23' of git://people.freedesktop.org/~danvet/drm-intel into drm-core-next
Daniel Vetter writes: A new drm-intel-next pull. Highlights: - More gmbus patches from Daniel Kurtz, I think gmbus is now ready, all known issues fixed. - Fencing cleanup and pipelined fencing removal from Chris. - rc6 residency interface from Ben, useful for powertop. - Cleanups and code reorg around the ringbuffer code (Ben&me). - Use hw semaphores in the pageflip code from Ben. - More vlv stuff from Jesse, unfortunately his vlv cpu is doa, so less merged than I've hoped for - we still have the unused function warning :( - More hsw patches from Eugeni, again, not yet enabled fully. - intel_pm.c refactoring from Eugeni. - Ironlake sprite support from Chris. - And various smaller improvements/fixes all over the place. Note that this pull request also contains a backmerge of -rc3 to sort out a few things in -next. I've also had to frob the shortlog a bit to exclude anything that -rc3 brings in with this pull. Regression wise we have a few strange bugs going on, but for all of them closer inspection revealed that they've been pre-existing, just now slightly more likely to be hit. And for most of them we have a patch already. Otherwise QA has not reported any regressions, and I'm also not aware of anything bad happening in 3.4. * tag 'drm-intel-next-2012-04-23' of git://people.freedesktop.org/~danvet/drm-intel: (420 commits) drm/i915: rc6 residency (fix the fix) drm/i915/tv: fix open-coded ARRAY_SIZE. drm/i915: invalidate render cache on gen2 drm/i915: Silence the change of LVDS sync polarity drm/i915: add generic power management initialization drm/i915: move clock gating functionality into intel_pm module drm/i915: move emon functionality into intel_pm module drm/i915: move drps, rps and rc6-related functions to intel_pm drm/i915: fix line breaks in intel_pm drm/i915: move watermarks settings into intel_pm module drm/i915: move fbc-related functionality into intel_pm module drm/i915: Refactor get_fence() to use the common fence writing routine drm/i915: Refactor fence clearing to use the common fence writing routine drm/i915: Refactor put_fence() to use the common fence writing routine drm/i915: Prepare to consolidate fence writing drm/i915: Remove the unsightly "optimisation" from flush_fence() drm/i915: Simplify fence finding drm/i915: Discard the unused obj->last_fenced_ring drm/i915: Remove unused ring->setup_seqno drm/i915: Remove fence pipelining ...
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 4c96187e2049..4f37dbbb8640 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 */
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-15 18:26:05 -0500