1. 根目录:
2. arch
3. h8300
4. include
5. asm
6. irqflags.h

#ifndef _H8300_IRQFLAGS_H
#define _H8300_IRQFLAGS_H

static inline unsigned long arch_local_save_flags(void)
{
	unsigned long flags;
	asm volatile ("stc ccr,%w0" : "=r" (flags));
	return flags;
}

static inline void arch_local_irq_disable(void)
{
	asm volatile ("orc  #0x80,ccr" : : : "memory");
}

static inline void arch_local_irq_enable(void)
{
	asm volatile ("andc #0x7f,ccr" : : : "memory");
}

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

static inline void arch_local_irq_restore(unsigned long flags)
{
	asm volatile ("ldc %w0,ccr" : : "r" (flags) : "memory");
}

static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
	return (flags & 0x80) == 0x80;
}

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

#endif /* _H8300_IRQFLAGS_H */