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40c9c62c85
A trivial check to check if IRQs are on although they should be off. Signed-off-by: Helge Deller <deller@gmx.de>
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PARISC_IRQFLAGS_H
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#define __PARISC_IRQFLAGS_H
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#include <linux/types.h>
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#include <asm/psw.h>
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static inline unsigned long arch_local_save_flags(void)
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{
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unsigned long flags;
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asm volatile("ssm 0, %0" : "=r" (flags) : : "memory");
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return flags;
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}
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static inline void arch_local_irq_disable(void)
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{
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asm volatile("rsm %0,%%r0\n" : : "i" (PSW_I) : "memory");
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}
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static inline void arch_local_irq_enable(void)
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{
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asm volatile("ssm %0,%%r0\n" : : "i" (PSW_I) : "memory");
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}
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static inline unsigned long arch_local_irq_save(void)
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{
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unsigned long flags;
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asm volatile("rsm %1,%0" : "=r" (flags) : "i" (PSW_I) : "memory");
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return flags;
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}
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static inline void arch_local_irq_restore(unsigned long flags)
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{
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/* warn if IRQs are on although they should be off */
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if (IS_ENABLED(CONFIG_LIGHTWEIGHT_SPINLOCK_CHECK))
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if (arch_local_save_flags() & PSW_I)
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asm volatile("break 6,6\n"); /* SPINLOCK_BREAK_INSN */
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asm volatile("mtsm %0" : : "r" (flags) : "memory");
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}
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static inline bool arch_irqs_disabled_flags(unsigned long flags)
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{
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return (flags & PSW_I) == 0;
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}
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static inline 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 /* __PARISC_IRQFLAGS_H */
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