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78 lines
1.8 KiB
78 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright IBM Corp. 2006, 2010 |
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* Author(s): Martin Schwidefsky <[email protected]> |
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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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