78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
/*
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* Copyright IBM Corp. 2006, 2010
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#ifndef __ASM_IRQFLAGS_H
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#define __ASM_IRQFLAGS_H
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#include <linux/types.h>
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#define ARCH_IRQ_ENABLED (3UL << (BITS_PER_LONG - 8))
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/* store then OR system mask. */
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#define __arch_local_irq_stosm(__or) \
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({ \
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unsigned long __mask; \
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asm volatile( \
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" stosm %0,%1" \
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: "=Q" (__mask) : "i" (__or) : "memory"); \
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__mask; \
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})
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/* store then AND system mask. */
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#define __arch_local_irq_stnsm(__and) \
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({ \
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unsigned long __mask; \
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asm volatile( \
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" stnsm %0,%1" \
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: "=Q" (__mask) : "i" (__and) : "memory"); \
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__mask; \
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})
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/* set system mask. */
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static inline notrace void __arch_local_irq_ssm(unsigned long flags)
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{
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asm volatile("ssm %0" : : "Q" (flags) : "memory");
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}
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static inline notrace unsigned long arch_local_save_flags(void)
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{
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return __arch_local_irq_stnsm(0xff);
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}
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static inline notrace unsigned long arch_local_irq_save(void)
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{
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return __arch_local_irq_stnsm(0xfc);
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}
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static inline notrace void arch_local_irq_disable(void)
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{
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arch_local_irq_save();
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}
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static inline notrace void arch_local_irq_enable(void)
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{
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__arch_local_irq_stosm(0x03);
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}
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/* This only restores external and I/O interrupt state */
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static inline notrace void arch_local_irq_restore(unsigned long flags)
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{
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/* only disabled->disabled and disabled->enabled is valid */
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if (flags & ARCH_IRQ_ENABLED)
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arch_local_irq_enable();
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}
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static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
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{
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return !(flags & ARCH_IRQ_ENABLED);
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}
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static inline notrace bool arch_irqs_disabled(void)
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{
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return arch_irqs_disabled_flags(arch_local_save_flags());
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}
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#endif /* __ASM_IRQFLAGS_H */
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