1 files changed, 115 insertions, 0 deletions

diff --git a/include/asm-ppc64/irq.h b/include/asm-ppc64/irq.h
new file mode 100644
index 000000000000..570678b1da95
--- /dev/null
+++ b/include/asm-ppc64/irq.h
@@ -0,0 +1,115 @@
+#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 <linux/config.h>
+#include <linux/threads.h>
+
+/*
+ * Maximum number of interrupt sources that we can handle.
+ */
+#define NR_IRQS         512
+
+/* this number is used when no interrupt has been assigned */
+#define NO_IRQ                  (-1)
+
+/*
+ * These constants are used for passing information about interrupt
+ * signal polarity and level/edge sensing to the low-level PIC chip
+ * drivers.
+ */
+#define IRQ_SENSE_MASK          0x1
+#define IRQ_SENSE_LEVEL         0x1     /* interrupt on active level */
+#define IRQ_SENSE_EDGE          0x0     /* interrupt triggered by edge */
+
+#define IRQ_POLARITY_MASK       0x2
+#define IRQ_POLARITY_POSITIVE   0x2     /* high level or low->high edge */
+#define IRQ_POLARITY_NEGATIVE   0x0     /* low level or high->low edge */
+
+#define get_irq_desc(irq) (&irq_desc[(irq)])
+
+/* Define a way to iterate across irqs. */
+#define for_each_irq(i) \
+        for ((i) = 0; (i) < NR_IRQS; ++(i))
+
+/* Interrupt numbers are virtual in case they are sparsely
+ * distributed by the hardware.
+ */
+extern unsigned int 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.
+ */
+int virt_irq_create_mapping(unsigned int real_irq);
+void virt_irq_init(void);
+
+static inline unsigned int virt_irq_to_real(unsigned int virt_irq)
+{
+        return virt_irq_to_real_map[virt_irq];
+}
+
+extern unsigned int real_irq_to_virt_slowpath(unsigned int real_irq);
+
+/*
+ * Because many systems have two overlapping names spaces for
+ * interrupts (ISA and XICS for example), and the ISA interrupts
+ * have historically not been easy to renumber, we allow ISA
+ * interrupts to take values 0 - 15, and shift up the remaining
+ * interrupts by 0x10.
+ */
+#define NUM_ISA_INTERRUPTS      0x10
+extern int __irq_offset_value;
+
+static inline int irq_offset_up(int irq)
+{
+        return(irq + __irq_offset_value);
+}
+
+static inline int irq_offset_down(int irq)
+{
+        return(irq - __irq_offset_value);
+}
+
+static inline int irq_offset_value(void)
+{
+        return __irq_offset_value;
+}
+
+static __inline__ int irq_canonicalize(int irq)
+{
+        return irq;
+}
+
+extern int distribute_irqs;
+
+struct irqaction;
+struct pt_regs;
+
+#ifdef CONFIG_IRQSTACKS
+/*
+ * Per-cpu stacks for handling hard and soft interrupts.
+ */
+extern struct thread_info *hardirq_ctx[NR_CPUS];
+extern struct thread_info *softirq_ctx[NR_CPUS];
+
+extern void irq_ctx_init(void);
+extern void call_do_softirq(struct thread_info *tp);
+extern int call_handle_IRQ_event(int irq, struct pt_regs *regs,
+                        struct irqaction *action, struct thread_info *tp);
+
+#define __ARCH_HAS_DO_SOFTIRQ
+
+#else
+#define irq_ctx_init()
+
+#endif /* CONFIG_IRQSTACKS */
+
+#endif /* _ASM_IRQ_H */
+#endif /* __KERNEL__ */