/* 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;
|
}
|
|
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) */
|
