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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/score/include/asm/irqflags.h
10819 views
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#ifndef _ASM_SCORE_IRQFLAGS_H

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#define _ASM_SCORE_IRQFLAGS_H

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#ifndef __ASSEMBLY__

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#include <linux/types.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(

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		"	mfcr	r8, cr0		\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	mv	%0, r8		\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	ldi	r9, 0x1		\n"

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		"	and	%0, %0, r9	\n"

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		: "=r" (flags)

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		:

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		: "r8", "r9");

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	return 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;

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	asm volatile(

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		"	mfcr	r8, cr0		\n"

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		"	li	r9, 0xfffffffe	\n"

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		"	nop			\n"

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		"	mv	%0, r8		\n"

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		"	and	r8, r8, r9	\n"

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		"	mtcr	r8, cr0		\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		: "=r" (flags)

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		:

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		: "r8", "r9", "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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	asm volatile(

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		"	mfcr	r8, cr0		\n"

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		"	ldi	r9, 0x1		\n"

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		"	and	%0, %0, r9	\n"

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		"	or	r8, r8, %0	\n"

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		"	mtcr	r8, cr0		\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		:

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		: "r"(flags)

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		: "r8", "r9", "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(

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		"	mfcr	r8,cr0		\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	ori	r8,0x1		\n"

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		"	mtcr	r8,cr0		\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		:

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		:

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		: "r8", "memory");

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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(

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		"	mfcr	r8,cr0		\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	srli	r8,r8,1		\n"

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		"	slli	r8,r8,1		\n"

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		"	mtcr	r8,cr0		\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		"	nop			\n"

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		:

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		:

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		: "r8", "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 & 1);

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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 /* __ASSEMBLY__ */

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#endif /* _ASM_SCORE_IRQFLAGS_H */

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