patch-2.3.48 linux/include/asm-mips64/hardirq.h

• Lines: 41
• Date: Thu Feb 24 22:53:35 2000
• Orig file: v2.3.47/linux/include/asm-mips64/hardirq.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.47/linux/include/asm-mips64/hardirq.h linux/include/asm-mips64/hardirq.h
@@ -0,0 +1,40 @@
+/* $Id: hardirq.h,v 1.4 2000/02/23 00:41:38 ralf Exp $
+ *
+ * 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 by Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_HARDIRQ_H
+#define _ASM_HARDIRQ_H
+
+#include <linux/threads.h>
+
+extern unsigned int local_irq_count[NR_CPUS];
+
+/*
+ * Are we in an interrupt context? Either doing bottom half
+ * or hardware interrupt processing?
+ */
+#define in_interrupt() ({ int __cpu = smp_processor_id(); \
+	(local_irq_count[__cpu] + local_bh_count[__cpu] != 0); })
+#define in_irq() (local_irq_count[smp_processor_id()] != 0)
+
+#ifndef __SMP__
+
+#define hardirq_trylock(cpu)	(local_irq_count[cpu] == 0)
+#define hardirq_endlock(cpu)	do { } while (0)
+
+#define irq_enter(cpu)		(local_irq_count[cpu]++)
+#define irq_exit(cpu)		(local_irq_count[cpu]--)
+
+#define synchronize_irq()	barrier();
+
+#else
+
+#error No habla MIPS SMP
+
+#endif /* __SMP__ */
+#endif /* _ASM_HARDIRQ_H */