softirq.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:1k
- /*
- * 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:tllt%0, %1ttt# __cpu_raise_softirqnt"
- "ort%0, %2nt"
- "sct%0, %1nt"
- "beqzt%0, 1b"
- : "=&r" (temp), "=m" (*m)
- : "ir" (1UL << nr), "m" (*m)
- : "memory");
- }
- #endif /* _ASM_SOFTIRQ_H */