/*
* 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.
*
* Copyright (C) 1994, 95, 96, 97, 98, 99, 2003 by Ralf Baechle
* Copyright (C) 1996 by Paul M. Antoine
* Copyright (C) 1999 Silicon Graphics
* Copyright (C) 2000 MIPS Technologies, Inc.
*/
#ifndef _ASM_INTERRUPT_H
#define _ASM_INTERRUPT_H
#include <asm/hazards.h>
__asm__ (
".macro\tlocal_irq_enable\n\t"
".set\tpush\n\t"
".set\treorder\n\t"
".set\tnoat\n\t"
"mfc0\t$1,$12\n\t"
"ori\t$1,0x1f\n\t"
"xori\t$1,0x1e\n\t"
"mtc0\t$1,$12\n\t"
"irq_enable_hazard\n\t"
".set\tpop\n\t"
".endm");
static inline void local_irq_enable(void)
{
__asm__ __volatile__(
"local_irq_enable"
: /* no outputs */
: /* no inputs */
: "memory");
}
/*
* For cli() we have to insert nops to make sure that the new value
* has actually arrived in the status register before the end of this
* macro.
* R4000/R4400 need three nops, the R4600 two nops and the R10000 needs
* no nops at all.
*/
__asm__ (
".macro\tlocal_irq_disable\n\t"
".set\tpush\n\t"
".set\tnoat\n\t"
"mfc0\t$1,$12\n\t"
"ori\t$1,1\n\t"
"xori\t$1,1\n\t"
".set\tnoreorder\n\t"
"mtc0\t$1,$12\n\t"
"irq_disable_hazard\n\t"
".set\tpop\n\t"
".endm");
static inline void local_irq_disable(void)
{
__asm__ __volatile__(
"local_irq_disable"
: /* no outputs */
: /* no inputs */
: "memory");
}
__asm__ (
".macro\tlocal_save_flags flags\n\t"
".set\tpush\n\t"
".set\treorder\n\t"
"mfc0\t\\flags, $12\n\t"
".set\tpop\n\t"
".endm");
#define local_save_flags(x) \
__asm__ __volatile__( \
"local_save_flags %0" \
: "=r" (x))
__asm__ (
".macro\tlocal_irq_save result\n\t"
".set\tpush\n\t"
".set\treorder\n\t"
".set\tnoat\n\t"
"mfc0\t\\result, $12\n\t"
"ori\t$1, \\result, 1\n\t"
"xori\t$1, 1\n\t"
".set\tnoreorder\n\t"
"mtc0\t$1, $12\n\t"
"irq_disable_hazard\n\t"
".set\tpop\n\t"
".endm");
#define local_irq_save(x) \
__asm__ __volatile__( \
"local_irq_save\t%0" \
: "=r" (x) \
: /* no inputs */ \
: "memory")
__asm__ (
".macro\tlocal_irq_restore flags\n\t"
".set\tnoreorder\n\t"
".set\tnoat\n\t"
"mfc0\t$1, $12\n\t"
"andi\t\\flags, 1\n\t"
"ori\t$1, 1\n\t"
"xori\t$1, 1\n\t"
"or\t\\flags, $1\n\t"
"mtc0\t\\flags, $12\n\t"
"irq_disable_hazard\n\t"
".set\tat\n\t"
".set\treorder\n\t"
".endm");
#define local_irq_restore(flags) \
do { \
unsigned long __tmp1; \
\
__asm__ __volatile__( \
"local_irq_restore\t%0" \
: "=r" (__tmp1) \
: "0" (flags) \
: "memory"); \
} while(0)
#define irqs_disabled() \
({ \
unsigned long flags; \
local_save_flags(flags); \
!(flags & 1); \
})
#endif /* _ASM_INTERRUPT_H */
