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