patch-2.4.22 linux-2.4.22/include/asm-sh64/hardirq.h

• Lines: 43
• Date: 2003-08-25 04:44:44.000000000 -0700
• Orig file: linux-2.4.21/include/asm-sh64/hardirq.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/include/asm-sh64/hardirq.h linux-2.4.22/include/asm-sh64/hardirq.h
@@ -0,0 +1,42 @@
+#ifndef __ASM_SH_HARDIRQ_H
+#define __ASM_SH_HARDIRQ_H
+
+#include <linux/config.h>
+#include <linux/threads.h>
+
+/* entry.S is sensitive to the offsets of these fields */
+typedef struct {
+	unsigned int __softirq_pending;
+	unsigned int __local_irq_count;
+	unsigned int __local_bh_count;
+	unsigned int __syscall_count;
+	struct task_struct * __ksoftirqd_task;
+} ____cacheline_aligned irq_cpustat_t;
+
+#include <linux/irq_cpustat.h>	/* Standard mappings for irq_cpustat_t above */
+
+/*
+ * 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 CONFIG_SMP
+
+#define hardirq_trylock(cpu)	(local_irq_count(cpu) == 0)
+#define hardirq_endlock(cpu)	do { } while (0)
+
+#define irq_enter(cpu, irq)	(local_irq_count(cpu)++)
+#define irq_exit(cpu, irq)	(local_irq_count(cpu)--)
+
+#define synchronize_irq()	barrier()
+
+#else
+
+#error Super-H SMP is not available
+
+#endif /* CONFIG_SMP */
+#endif /* __ASM_SH_HARDIRQ_H */