tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright IBM Corp. 2006,2010
3 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
4 */
5
6#ifndef __ASM_IRQFLAGS_H
7#define __ASM_IRQFLAGS_H
8
9#include <linux/types.h>
10
11#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
12
13/* store then or system mask. */
14#define __raw_local_irq_stosm(__or) \
15({ \
16 unsigned long __mask; \
17 asm volatile( \
18 " stosm %0,%1" \
19 : "=Q" (__mask) : "i" (__or) : "memory"); \
20 __mask; \
21})
22
23/* store then and system mask. */
24#define __raw_local_irq_stnsm(__and) \
25({ \
26 unsigned long __mask; \
27 asm volatile( \
28 " stnsm %0,%1" \
29 : "=Q" (__mask) : "i" (__and) : "memory"); \
30 __mask; \
31})
32
33/* set system mask. */
34#define __raw_local_irq_ssm(__mask) \
35({ \
36 asm volatile("ssm %0" : : "Q" (__mask) : "memory"); \
37})
38
39#else /* __GNUC__ */
40
41/* store then or system mask. */
42#define __raw_local_irq_stosm(__or) \
43({ \
44 unsigned long __mask; \
45 asm volatile( \
46 " stosm 0(%1),%2" \
47 : "=m" (__mask) \
48 : "a" (&__mask), "i" (__or) : "memory"); \
49 __mask; \
50})
51
52/* store then and system mask. */
53#define __raw_local_irq_stnsm(__and) \
54({ \
55 unsigned long __mask; \
56 asm volatile( \
57 " stnsm 0(%1),%2" \
58 : "=m" (__mask) \
59 : "a" (&__mask), "i" (__and) : "memory"); \
60 __mask; \
61})
62
63/* set system mask. */
64#define __raw_local_irq_ssm(__mask) \
65({ \
66 asm volatile( \
67 " ssm 0(%0)" \
68 : : "a" (&__mask), "m" (__mask) : "memory"); \
69})
70
71#endif /* __GNUC__ */
72
73/* interrupt control.. */
74static inline unsigned long raw_local_irq_enable(void)
75{
76 return __raw_local_irq_stosm(0x03);
77}
78
79static inline unsigned long raw_local_irq_disable(void)
80{
81 return __raw_local_irq_stnsm(0xfc);
82}
83
84#define raw_local_save_flags(x) \
85do { \
86 typecheck(unsigned long, x); \
87 (x) = __raw_local_irq_stosm(0x00); \
88} while (0)
89
90static inline void raw_local_irq_restore(unsigned long flags)
91{
92 __raw_local_irq_ssm(flags);
93}
94
95static inline int raw_irqs_disabled_flags(unsigned long flags)
96{
97 return !(flags & (3UL << (BITS_PER_LONG - 8)));
98}
99
100/* For spinlocks etc */
101#define raw_local_irq_save(x) ((x) = raw_local_irq_disable())
102
103#endif /* __ASM_IRQFLAGS_H */