Import of Linux/MIPS 2.1.36

1 files changed, 29 insertions, 0 deletions

diff --git a/include/asm-sparc64/hardirq.h b/include/asm-sparc64/hardirq.h
new file mode 100644
index 000000000..b7cd278e7
--- /dev/null
+++ b/include/asm-sparc64/hardirq.h
@@ -0,0 +1,29 @@
+/* hardirq.h: 64-bit Sparc hard IRQ support.
+ *
+ * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef __SPARC64_HARDIRQ_H
+#define __SPARC64_HARDIRQ_H
+
+#include <linux/tasks.h>
+
+extern unsigned int local_irq_count[NR_CPUS];
+#define in_interrupt()	(local_irq_count[smp_processor_id()] != 0)
+#define hardirq_depth()	(local_irq_count[smp_processor_id()])
+
+#ifdef __SMP__
+#error SMP not supported on sparc64
+#else /* !(__SMP__) */
+
+#define hardirq_trylock(cpu)	(++local_irq_count[cpu], (cpu)==0)
+#define hardirq_endlock(cpu)	(--local_irq_count[cpu])
+
+#define hardirq_enter(cpu)	(local_irq_count[cpu]++)
+#define hardirq_exit(cpu)	(local_irq_count[cpu]--)
+
+#define synchronize_irq()	do { } while(0)
+
+#endif /* __SMP__ */
+
+#endif /* !(__SPARC64_HARDIRQ_H) */