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/* store then OR system mask. */
12#define __arch_local_irq_stosm(__or)					\
13({									\
14	unsigned long __mask;						\
15	asm volatile(							\
16		"	stosm	%0,%1"					\
17		: "=Q" (__mask) : "i" (__or) : "memory");		\
18	__mask;								\
19})
20
21/* store then AND system mask. */
22#define __arch_local_irq_stnsm(__and)					\
23({									\
24	unsigned long __mask;						\
25	asm volatile(							\
26		"	stnsm	%0,%1"					\
27		: "=Q" (__mask) : "i" (__and) : "memory");		\
28	__mask;								\
29})
30
31/* set system mask. */
32static inline notrace void __arch_local_irq_ssm(unsigned long flags)
33{
34	asm volatile("ssm   %0" : : "Q" (flags) : "memory");
35}
36
37static inline notrace unsigned long arch_local_save_flags(void)
38{
39	return __arch_local_irq_stosm(0x00);
40}
41
42static inline notrace unsigned long arch_local_irq_save(void)
43{
44	return __arch_local_irq_stnsm(0xfc);
45}
46
47static inline notrace void arch_local_irq_disable(void)
48{
49	arch_local_irq_save();
50}
51
52static inline notrace void arch_local_irq_enable(void)
53{
54	__arch_local_irq_stosm(0x03);
55}
56
 
57static inline notrace void arch_local_irq_restore(unsigned long flags)
58{
59	__arch_local_irq_ssm(flags);
 
 
60}
61
62static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
63{
64	return !(flags & (3UL << (BITS_PER_LONG - 8)));
65}
66
67static inline notrace bool arch_irqs_disabled(void)
68{
69	return arch_irqs_disabled_flags(arch_local_save_flags());
70}
71
72#endif /* __ASM_IRQFLAGS_H */

 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#define ARCH_IRQ_ENABLED	(3UL << (BITS_PER_LONG - 8))
12
13/* store then OR system mask. */
14#define __arch_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 __arch_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. */
34static inline notrace void __arch_local_irq_ssm(unsigned long flags)
35{
36	asm volatile("ssm   %0" : : "Q" (flags) : "memory");
37}
38
39static inline notrace unsigned long arch_local_save_flags(void)
40{
41	return __arch_local_irq_stnsm(0xff);
42}
43
44static inline notrace unsigned long arch_local_irq_save(void)
45{
46	return __arch_local_irq_stnsm(0xfc);
47}
48
49static inline notrace void arch_local_irq_disable(void)
50{
51	arch_local_irq_save();
52}
53
54static inline notrace void arch_local_irq_enable(void)
55{
56	__arch_local_irq_stosm(0x03);
57}
58
59/* This only restores external and I/O interrupt state */
60static inline notrace void arch_local_irq_restore(unsigned long flags)
61{
62	/* only disabled->disabled and disabled->enabled is valid */
63	if (flags & ARCH_IRQ_ENABLED)
64		arch_local_irq_enable();
65}
66
67static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
68{
69	return !(flags & ARCH_IRQ_ENABLED);
70}
71
72static inline notrace bool arch_irqs_disabled(void)
73{
74	return arch_irqs_disabled_flags(arch_local_save_flags());
75}
76
77#endif /* __ASM_IRQFLAGS_H */