Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[linux-2.6] / include / asm-sparc / irqflags_64.h
1 /*
2  * include/asm-sparc64/irqflags.h
3  *
4  * IRQ flags handling
5  *
6  * This file gets included from lowlevel asm headers too, to provide
7  * wrapped versions of the local_irq_*() APIs, based on the
8  * raw_local_irq_*() functions from the lowlevel headers.
9  */
10 #ifndef _ASM_IRQFLAGS_H
11 #define _ASM_IRQFLAGS_H
12
13 #ifndef __ASSEMBLY__
14
15 static inline unsigned long __raw_local_save_flags(void)
16 {
17         unsigned long flags;
18
19         __asm__ __volatile__(
20                 "rdpr   %%pil, %0"
21                 : "=r" (flags)
22         );
23
24         return flags;
25 }
26
27 #define raw_local_save_flags(flags) \
28                 do { (flags) = __raw_local_save_flags(); } while (0)
29
30 static inline void raw_local_irq_restore(unsigned long flags)
31 {
32         __asm__ __volatile__(
33                 "wrpr   %0, %%pil"
34                 : /* no output */
35                 : "r" (flags)
36                 : "memory"
37         );
38 }
39
40 static inline void raw_local_irq_disable(void)
41 {
42         __asm__ __volatile__(
43                 "wrpr   15, %%pil"
44                 : /* no outputs */
45                 : /* no inputs */
46                 : "memory"
47         );
48 }
49
50 static inline void raw_local_irq_enable(void)
51 {
52         __asm__ __volatile__(
53                 "wrpr   0, %%pil"
54                 : /* no outputs */
55                 : /* no inputs */
56                 : "memory"
57         );
58 }
59
60 static inline int raw_irqs_disabled_flags(unsigned long flags)
61 {
62         return (flags > 0);
63 }
64
65 static inline int raw_irqs_disabled(void)
66 {
67         unsigned long flags = __raw_local_save_flags();
68
69         return raw_irqs_disabled_flags(flags);
70 }
71
72 /*
73  * For spinlocks, etc:
74  */
75 static inline unsigned long __raw_local_irq_save(void)
76 {
77         unsigned long flags = __raw_local_save_flags();
78
79         raw_local_irq_disable();
80
81         return flags;
82 }
83
84 #define raw_local_irq_save(flags) \
85                 do { (flags) = __raw_local_irq_save(); } while (0)
86
87 #endif /* (__ASSEMBLY__) */
88
89 #endif /* !(_ASM_IRQFLAGS_H) */