patch-2.4.19 linux-2.4.19/include/asm-ppc64/irq.h

• Lines: 56
• Date: Fri Aug 2 17:39:45 2002
• Orig file: linux-2.4.18/include/asm-ppc64/irq.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/include/asm-ppc64/irq.h linux-2.4.19/include/asm-ppc64/irq.h
@@ -0,0 +1,55 @@
+#ifdef __KERNEL__
+#ifndef _ASM_IRQ_H
+#define _ASM_IRQ_H
+
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <asm/atomic.h>
+
+extern void disable_irq(unsigned int);
+extern void disable_irq_nosync(unsigned int);
+extern void enable_irq(unsigned int);
+
+/*
+ * this is the maximum number of virtual irqs we will use.
+ */
+#define NR_IRQS			512
+
+#define NUM_8259_INTERRUPTS	16
+
+/* Interrupt numbers are virtual in case they are sparsely
+ * distributed by the hardware.
+ */
+#define NR_HW_IRQS		8192
+extern unsigned short real_irq_to_virt_map[NR_HW_IRQS];
+extern unsigned short virt_irq_to_real_map[NR_IRQS];
+/* Create a mapping for a real_irq if it doesn't already exist.
+ * Return the virtual irq as a convenience.
+ */
+unsigned long virt_irq_create_mapping(unsigned long real_irq);
+
+/* These funcs map irqs between real and virtual */
+static inline unsigned long real_irq_to_virt(unsigned long real_irq) {
+	return real_irq_to_virt_map[real_irq];
+}
+static inline unsigned long virt_irq_to_real(unsigned long virt_irq) {
+	return virt_irq_to_real_map[virt_irq];
+}
+
+/*
+ * This gets called from serial.c, which is now used on
+ * powermacs as well as prep/chrp boxes.
+ * Prep and chrp both have cascaded 8259 PICs.
+ */
+static __inline__ int irq_cannonicalize(int irq)
+{
+	return irq;
+}
+
+#endif /* _ASM_IRQ_H */
+#endif /* __KERNEL__ */