1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 *    Copyright IBM Corp. 2006, 2010
 4 *    Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 5 */
 6
 7#ifndef __ASM_IRQFLAGS_H
 8#define __ASM_IRQFLAGS_H
 9
10#include <linux/types.h>
11
12#define ARCH_IRQ_ENABLED	(3UL << (BITS_PER_LONG - 8))
13
14/* store then OR system mask. */
15#define __arch_local_irq_stosm(__or)					\
16({									\
17	unsigned long __mask;						\
18	asm volatile(							\
19		"	stosm	%0,%1"					\
20		: "=Q" (__mask) : "i" (__or) : "memory");		\
21	__mask;								\
22})
23
24/* store then AND system mask. */
25#define __arch_local_irq_stnsm(__and)					\
26({									\
27	unsigned long __mask;						\
28	asm volatile(							\
29		"	stnsm	%0,%1"					\
30		: "=Q" (__mask) : "i" (__and) : "memory");		\
31	__mask;								\
32})
33
34/* set system mask. */
35static __always_inline void __arch_local_irq_ssm(unsigned long flags)
36{
37	asm volatile("ssm   %0" : : "Q" (flags) : "memory");
38}
39
40static __always_inline unsigned long arch_local_save_flags(void)
41{
42	return __arch_local_irq_stnsm(0xff);
43}
44
45static __always_inline unsigned long arch_local_irq_save(void)
46{
47	return __arch_local_irq_stnsm(0xfc);
48}
49
50static __always_inline void arch_local_irq_disable(void)
51{
52	arch_local_irq_save();
53}
54
55static __always_inline void arch_local_irq_enable(void)
56{
57	__arch_local_irq_stosm(0x03);
58}
59
60/* This only restores external and I/O interrupt state */
61static __always_inline void arch_local_irq_restore(unsigned long flags)
62{
63	/* only disabled->disabled and disabled->enabled is valid */
64	if (flags & ARCH_IRQ_ENABLED)
65		arch_local_irq_enable();
66}
67
68static __always_inline bool arch_irqs_disabled_flags(unsigned long flags)
69{
70	return !(flags & ARCH_IRQ_ENABLED);
71}
72
73static __always_inline bool arch_irqs_disabled(void)
74{
75	return arch_irqs_disabled_flags(arch_local_save_flags());
76}
77
78#endif /* __ASM_IRQFLAGS_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 *    Copyright IBM Corp. 2006, 2010
 4 *    Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 5 */
 6
 7#ifndef __ASM_IRQFLAGS_H
 8#define __ASM_IRQFLAGS_H
 9
10#include <linux/types.h>
11
12#define ARCH_IRQ_ENABLED	(3UL << (BITS_PER_LONG - 8))
13
14/* store then OR system mask. */
15#define __arch_local_irq_stosm(__or)					\
16({									\
17	unsigned long __mask;						\
18	asm volatile(							\
19		"	stosm	%0,%1"					\
20		: "=Q" (__mask) : "i" (__or) : "memory");		\
21	__mask;								\
22})
23
24/* store then AND system mask. */
25#define __arch_local_irq_stnsm(__and)					\
26({									\
27	unsigned long __mask;						\
28	asm volatile(							\
29		"	stnsm	%0,%1"					\
30		: "=Q" (__mask) : "i" (__and) : "memory");		\
31	__mask;								\
32})
33
34/* set system mask. */
35static inline notrace void __arch_local_irq_ssm(unsigned long flags)
36{
37	asm volatile("ssm   %0" : : "Q" (flags) : "memory");
38}
39
40static inline notrace unsigned long arch_local_save_flags(void)
41{
42	return __arch_local_irq_stnsm(0xff);
43}
44
45static inline notrace unsigned long arch_local_irq_save(void)
46{
47	return __arch_local_irq_stnsm(0xfc);
48}
49
50static inline notrace void arch_local_irq_disable(void)
51{
52	arch_local_irq_save();
53}
54
55static inline notrace void arch_local_irq_enable(void)
56{
57	__arch_local_irq_stosm(0x03);
58}
59
60/* This only restores external and I/O interrupt state */
61static inline notrace void arch_local_irq_restore(unsigned long flags)
62{
63	/* only disabled->disabled and disabled->enabled is valid */
64	if (flags & ARCH_IRQ_ENABLED)
65		arch_local_irq_enable();
66}
67
68static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
69{
70	return !(flags & ARCH_IRQ_ENABLED);
71}
72
73static inline notrace bool arch_irqs_disabled(void)
74{
75	return arch_irqs_disabled_flags(arch_local_save_flags());
76}
77
78#endif /* __ASM_IRQFLAGS_H */