Viewing file:  softirq.h (1.35 KB) -rw-r--r--
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/*
* 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) 1997, 1998, 1999, 2000, 2001 by Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2001 MIPS Technologies, Inc.
*/
#ifndef _ASM_SOFTIRQ_H
#define _ASM_SOFTIRQ_H
#include <asm/atomic.h>
#include <asm/hardirq.h>
extern inline void cpu_bh_disable(int cpu)
{
local_bh_count(cpu)++;
barrier();
}
extern inline void __cpu_bh_enable(int cpu)
{
barrier();
local_bh_count(cpu)--;
}
#define local_bh_disable() cpu_bh_disable(smp_processor_id())
#define __local_bh_enable() __cpu_bh_enable(smp_processor_id())
#define local_bh_enable() \
do { \
int cpu; \
\
barrier(); \
cpu = smp_processor_id(); \
if (!--local_bh_count(cpu) && softirq_pending(cpu)) \
do_softirq(); \
} while (0)
#define in_softirq() (local_bh_count(smp_processor_id()) != 0)
extern inline void __cpu_raise_softirq(int cpu, int nr)
{
unsigned int *m = (unsigned int *) &softirq_pending(cpu);
unsigned int temp;
__asm__ __volatile__(
"1:\tll\t%0, %1\t\t\t# __cpu_raise_softirq\n\t"
"or\t%0, %2\n\t"
"sc\t%0, %1\n\t"
"beqz\t%0, 1b"
: "=&r" (temp), "=m" (*m)
: "ir" (1UL << nr), "m" (*m)
: "memory");
}
#endif /* _ASM_SOFTIRQ_H */
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