Release 4.14 arch/sparc/include/asm/psr.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * psr.h: This file holds the macros for masking off various parts of
 *        the processor status register on the Sparc. This is valid
 *        for Version 8. On the V9 this is renamed to the PSTATE
 *        register and its members are accessed as fields like
 *        PSTATE.PRIV for the current CPU privilege level.
 *
 * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
 */
#ifndef __LINUX_SPARC_PSR_H

#define __LINUX_SPARC_PSR_H

#include <uapi/asm/psr.h>


#ifndef __ASSEMBLY__
/* Get the %psr register. */


static inline unsigned int get_psr(void)
{
	unsigned int psr;
	__asm__ __volatile__(
                "rd     %%psr, %0\n\t"
                "nop\n\t"
                "nop\n\t"
                "nop\n\t"
        : "=r" (psr)
        : /* no inputs */
	: "memory");

	return psr;
}

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4
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static inline void put_psr(unsigned int new_psr)
{
	__asm__ __volatile__(
                "wr     %0, 0x0, %%psr\n\t"
                "nop\n\t"
                "nop\n\t"
                "nop\n\t"
        : /* no outputs */
	: "r" (new_psr)
        : "memory", "cc");
}

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/* Get the %fsr register.  Be careful, make sure the floating point
 * enable bit is set in the %psr when you execute this or you will
 * incur a trap.
 */

extern unsigned int fsr_storage;



static inline unsigned int get_fsr(void)
{
	unsigned int fsr = 0;

	__asm__ __volatile__(
                "st     %%fsr, %1\n\t"
                "ld     %1, %0\n\t"
        : "=r" (fsr)
        : "m" (fsr_storage));

	return fsr;
}

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#endif /* !(__ASSEMBLY__) */

#endif /* !(__LINUX_SPARC_PSR_H) */
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David Howells
3
3.45%
1
10.00%
Greg Kroah-Hartman
1
1.15%
1
10.00%
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10
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Directory: arch/sparc/include/asm

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