[linux-2.6-block.git] / arch / s390 / include / asm / irqflags.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *    Copyright IBM Corp. 2006, 2010
 *    Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 */

#ifndef __ASM_IRQFLAGS_H
#define __ASM_IRQFLAGS_H

#include <linux/types.h>

#define ARCH_IRQ_ENABLED	(3UL << (BITS_PER_LONG - 8))

/* store then OR system mask. */
#define __arch_local_irq_stosm(__or)					\
({									\
	unsigned long __mask;						\
	asm volatile(							\
		"	stosm	%0,%1"					\
		: "=Q" (__mask) : "i" (__or) : "memory");		\
	__mask;								\
})

/* store then AND system mask. */
#define __arch_local_irq_stnsm(__and)					\
({									\
	unsigned long __mask;						\
	asm volatile(							\
		"	stnsm	%0,%1"					\
		: "=Q" (__mask) : "i" (__and) : "memory");		\
	__mask;								\
})

/* set system mask. */
static __always_inline void __arch_local_irq_ssm(unsigned long flags)
{
	asm volatile("ssm   %0" : : "Q" (flags) : "memory");
}

#ifdef CONFIG_KMSAN
#define arch_local_irq_attributes noinline notrace __no_sanitize_memory __maybe_unused
#else
#define arch_local_irq_attributes __always_inline
#endif

static arch_local_irq_attributes unsigned long arch_local_save_flags(void)
{
	return __arch_local_irq_stnsm(0xff);
}

static arch_local_irq_attributes unsigned long arch_local_irq_save(void)
{
	return __arch_local_irq_stnsm(0xfc);
}

static __always_inline void arch_local_irq_disable(void)
{
	arch_local_irq_save();
}

static arch_local_irq_attributes void arch_local_irq_enable_external(void)
{
	__arch_local_irq_stosm(0x01);
}

static arch_local_irq_attributes void arch_local_irq_enable(void)
{
	__arch_local_irq_stosm(0x03);
}

/* This only restores external and I/O interrupt state */
static __always_inline void arch_local_irq_restore(unsigned long flags)
{
	/* only disabled->disabled and disabled->enabled is valid */
	if (flags & ARCH_IRQ_ENABLED)
		arch_local_irq_enable();
}

static __always_inline bool arch_irqs_disabled_flags(unsigned long flags)
{
	return !(flags & ARCH_IRQ_ENABLED);
}

static __always_inline bool arch_irqs_disabled(void)
{
	return arch_irqs_disabled_flags(arch_local_save_flags());
}

#endif /* __ASM_IRQFLAGS_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1f194a4c	2	/*
a53c8fab	3	* Copyright IBM Corp. 2006, 2010
428aecf6	4	* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
1f194a4c HC	5	*/
	6
	7	#ifndef __ASM_IRQFLAGS_H
	8	#define __ASM_IRQFLAGS_H
	9
428aecf6	10	#include <linux/types.h>
1f194a4c	11
204ee2c5 CB	12	#define ARCH_IRQ_ENABLED (3UL << (BITS_PER_LONG - 8))
204ee2c5 CB	13
df9ee292 DH	14	/* store then OR system mask. */
df9ee292 DH	15	#define __arch_local_irq_stosm(__or) \
94c12cc7 MS	16	({ \
	17	unsigned long __mask; \
	18	asm volatile( \
	19	" stosm %0,%1" \
	20	: "=Q" (__mask) : "i" (__or) : "memory"); \
	21	__mask; \
	22	})
	23
df9ee292 DH	24	/* store then AND system mask. */
df9ee292 DH	25	#define __arch_local_irq_stnsm(__and) \
94c12cc7 MS	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. */
4aca3ab4	35	static __always_inline void __arch_local_irq_ssm(unsigned long flags)
df9ee292 DH	36	{
	37	asm volatile("ssm %0" : : "Q" (flags) : "memory");
	38	}
94c12cc7	39
1b301f5f IL	40	#ifdef CONFIG_KMSAN
	41	#define arch_local_irq_attributes noinline notrace __no_sanitize_memory __maybe_unused
	42	#else
	43	#define arch_local_irq_attributes __always_inline
	44	#endif
	45
	46	static arch_local_irq_attributes unsigned long arch_local_save_flags(void)
94c12cc7	47	{
81fc77fb	48	return __arch_local_irq_stnsm(0xff);
94c12cc7	49	}
63f4f9e1	50
1b301f5f	51	static arch_local_irq_attributes unsigned long arch_local_irq_save(void)
94c12cc7	52	{
df9ee292	53	return __arch_local_irq_stnsm(0xfc);
94c12cc7 MS	54	}
94c12cc7 MS	55
4aca3ab4	56	static __always_inline void arch_local_irq_disable(void)
df9ee292 DH	57	{
	58	arch_local_irq_save();
	59	}
1f194a4c	60
1b301f5f IL	61	static arch_local_irq_attributes void arch_local_irq_enable_external(void)
	62	{
	63	__arch_local_irq_stosm(0x01);
	64	}
	65
	66	static arch_local_irq_attributes void arch_local_irq_enable(void)
94c12cc7	67	{
df9ee292	68	__arch_local_irq_stosm(0x03);
94c12cc7	69	}
1f194a4c	70
204ee2c5	71	/* This only restores external and I/O interrupt state */
4aca3ab4	72	static __always_inline void arch_local_irq_restore(unsigned long flags)
df9ee292	73	{
204ee2c5 CB	74	/* only disabled->disabled and disabled->enabled is valid */
	75	if (flags & ARCH_IRQ_ENABLED)
	76	arch_local_irq_enable();
df9ee292 DH	77	}
df9ee292 DH	78
4aca3ab4	79	static __always_inline bool arch_irqs_disabled_flags(unsigned long flags)
1f194a4c	80	{
204ee2c5	81	return !(flags & ARCH_IRQ_ENABLED);
1f194a4c HC	82	}
1f194a4c HC	83
4aca3ab4	84	static __always_inline bool arch_irqs_disabled(void)
df9ee292 DH	85	{
	86	return arch_irqs_disabled_flags(arch_local_save_flags());
	87	}
1f194a4c	88
1f194a4c	89	#endif /* __ASM_IRQFLAGS_H */