/*
* Copyright (C) 2004-2006 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_AVR32_IRQFLAGS_H
#define __ASM_AVR32_IRQFLAGS_H

#include <linux/types.h>
#include <asm/sysreg.h>

static inline unsigned long arch_local_save_flags(void)
{
return sysreg_read(SR);
}

/*
* This will restore ALL status register flags, not only the interrupt
* mask flag.
*
* The empty asm statement informs the compiler of this fact while
* also serving as a barrier.
*/
static inline void arch_local_irq_restore(unsigned long flags)
{
sysreg_write(SR, flags);
asm volatile("" : : : "memory", "cc");
}

static inline void arch_local_irq_disable(void)
{
asm volatile("ssrf %0" : : "n"(SYSREG_GM_OFFSET) : "memory");
}

static inline void arch_local_irq_enable(void)
{
asm volatile("csrf %0" : : "n"(SYSREG_GM_OFFSET) : "memory");
}

static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
return (flags & SYSREG_BIT(GM)) != 0;
}

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

static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags = arch_local_save_flags();

arch_local_irq_disable();

return flags;
}

#endif /* __ASM_AVR32_IRQFLAGS_H */