patch-2.3.16 linux/include/asm-sh/softirq.h

• Lines: 73
• Date: Mon Aug 30 18:12:59 1999
• Orig file: v2.3.15/linux/include/asm-sh/softirq.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.15/linux/include/asm-sh/softirq.h linux/include/asm-sh/softirq.h
@@ -0,0 +1,72 @@
+#ifndef __ASM_SH_SOFTIRQ_H
+#define __ASM_SH_SOFTIRQ_H
+
+extern unsigned int local_bh_count[NR_CPUS];
+
+#define cpu_bh_disable(cpu)	do { local_bh_count[(cpu)]++; barrier(); } while (0)
+#define cpu_bh_enable(cpu)	do { barrier(); local_bh_count[(cpu)]--; } while (0)
+
+#define cpu_bh_trylock(cpu)	(local_bh_count[(cpu)] ? 0 : (local_bh_count[(cpu)] = 1))
+#define cpu_bh_endlock(cpu)	(local_bh_count[(cpu)] = 0)
+
+#define local_bh_disable()	cpu_bh_disable(smp_processor_id())
+#define local_bh_enable()	cpu_bh_enable(smp_processor_id())
+
+#define get_active_bhs()	(bh_mask & bh_active)
+/* XXX */
+#define clear_active_bhs(x)	atomic_clear_mask((x),&bh_active)
+
+extern inline void init_bh(int nr, void (*routine)(void))
+{
+	bh_base[nr] = routine;
+	atomic_set(&bh_mask_count[nr], 0);
+	bh_mask |= 1 << nr;
+}
+
+extern inline void remove_bh(int nr)
+{
+	bh_mask &= ~(1 << nr);
+	mb();
+	bh_base[nr] = NULL;
+}
+
+extern inline void mark_bh(int nr)
+{
+	set_bit(nr, &bh_active);
+}
+
+extern inline void start_bh_atomic(void)
+{
+	local_bh_disable();
+	barrier();
+}
+
+extern inline void end_bh_atomic(void)
+{
+	barrier();
+	local_bh_enable();
+}
+
+/* These are for the irq's testing the lock */
+#define softirq_trylock(cpu)	(cpu_bh_trylock(cpu))
+#define softirq_endlock(cpu)	(cpu_bh_endlock(cpu))
+#define synchronize_bh()	barrier()
+
+/*
+ * These use a mask count to correctly handle
+ * nested disable/enable calls
+ */
+extern inline void disable_bh(int nr)
+{
+	bh_mask &= ~(1 << nr);
+	atomic_inc(&bh_mask_count[nr]);
+	synchronize_bh();
+}
+
+extern inline void enable_bh(int nr)
+{
+	if (atomic_dec_and_test(&bh_mask_count[nr]))
+		bh_mask |= 1 << nr;
+}
+
+#endif /* __ASM_SH_SOFTIRQ_H */