Release 4.14 arch/microblaze/include/asm/irqflags.h

/*
 * Copyright (C) 2006 Atmark Techno, Inc.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#ifndef _ASM_MICROBLAZE_IRQFLAGS_H

#define _ASM_MICROBLAZE_IRQFLAGS_H

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

#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR



static inline notrace unsigned long arch_local_irq_save(void)
{
	unsigned long flags;
	asm volatile("      msrclr %0, %1   \n"
                     "  nop             \n"
                     : "=r"(flags)
                     : "i"(MSR_IE)
                     : "memory");
	return flags;
}

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static inline notrace void arch_local_irq_disable(void)
{
	/* this uses r0 without declaring it - is that correct? */
	asm volatile("      msrclr r0, %0   \n"
                     "  nop             \n"
                     :
                     : "i"(MSR_IE)
                     : "memory");
}

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static inline notrace void arch_local_irq_enable(void)
{
	/* this uses r0 without declaring it - is that correct? */
	asm volatile("      msrset  r0, %0  \n"
                     "  nop             \n"
                     :
                     : "i"(MSR_IE)
                     : "memory");
}

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#else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */



static inline notrace unsigned long arch_local_irq_save(void)
{
	unsigned long flags, tmp;
	asm volatile ("      mfs     %0, rmsr        \n"
                      " nop                     \n"
                      " andi    %1, %0, %2      \n"
                      " mts     rmsr, %1        \n"
                      " nop                     \n"
                      : "=r"(flags), "=r"(tmp)
                      : "i"(~MSR_IE)
                      : "memory");
	return flags;
}

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static inline notrace void arch_local_irq_disable(void)
{
	unsigned long tmp;
	asm volatile("      mfs     %0, rmsr        \n"
                     "  nop                     \n"
                     "  andi    %0, %0, %1      \n"
                     "  mts     rmsr, %0        \n"
                     "  nop                     \n"
                     : "=r"(tmp)
                     : "i"(~MSR_IE)
                     : "memory");
}

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static inline notrace void arch_local_irq_enable(void)
{
	unsigned long tmp;
	asm volatile("      mfs     %0, rmsr        \n"
                     "  nop                     \n"
                     "  ori     %0, %0, %1      \n"
                     "  mts     rmsr, %0        \n"
                     "  nop                     \n"
                     : "=r"(tmp)
                     : "i"(MSR_IE)
                     : "memory");
}

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#endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */



static inline notrace unsigned long arch_local_save_flags(void)
{
	unsigned long flags;
	asm volatile("      mfs     %0, rmsr        \n"
                     "  nop                     \n"
                     : "=r"(flags)
                     :
                     : "memory");
	return flags;
}

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static inline notrace void arch_local_irq_restore(unsigned long flags)
{
	asm volatile("      mts     rmsr, %0        \n"
                     "  nop                     \n"
                     :
                     : "r"(flags)
                     : "memory");
}

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

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

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#endif /* _ASM_MICROBLAZE_IRQFLAGS_H */
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Directory: arch/microblaze/include/asm

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