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/* 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 ([email protected])
*/
#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;
}
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");
}
/* 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;
}
#endif /* !(__ASSEMBLY__) */
#endif /* !(__LINUX_SPARC_PSR_H) */