62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/*
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* Copyright (C) 2004-2006 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_AVR32_IRQFLAGS_H
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#define __ASM_AVR32_IRQFLAGS_H
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#include <linux/types.h>
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#include <asm/sysreg.h>
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static inline unsigned long arch_local_save_flags(void)
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{
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return sysreg_read(SR);
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}
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/*
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* This will restore ALL status register flags, not only the interrupt
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* mask flag.
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*
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* The empty asm statement informs the compiler of this fact while
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* also serving as a barrier.
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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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sysreg_write(SR, flags);
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asm volatile("" : : : "memory", "cc");
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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("ssrf %0" : : "n"(SYSREG_GM_OFFSET) : "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("csrf %0" : : "n"(SYSREG_GM_OFFSET) : "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 & SYSREG_BIT(GM)) != 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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static inline unsigned long arch_local_irq_save(void)
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{
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unsigned long flags = arch_local_save_flags();
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arch_local_irq_disable();
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return flags;
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}
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#endif /* __ASM_AVR32_IRQFLAGS_H */
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