arch/microblaze/include/asm/irq.h

   1 /*
   2  * Copyright (C) 2006 Atmark Techno, Inc.
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License. See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  */
   8
   9 #ifndef _ASM_MICROBLAZE_IRQ_H
  10 #define _ASM_MICROBLAZE_IRQ_H
  11
  12
  13 /*
  14  * Linux IRQ# is currently offset by one to map to the hardware
  15  * irq number. So hardware IRQ0 maps to Linux irq 1.
  16  */
  17 #define NO_IRQ_OFFSET   1
  18 #define IRQ_OFFSET      NO_IRQ_OFFSET
  19 #define NR_IRQS         (32 + IRQ_OFFSET)
  20 #include <asm-generic/irq.h>
  21
  22 /* This type is the placeholder for a hardware interrupt number. It has to
  23  * be big enough to enclose whatever representation is used by a given
  24  * platform.
  25  */
  26 typedef unsigned long irq_hw_number_t;
  27
  28 extern unsigned int nr_irq;
  29
  30 struct pt_regs;
  31 extern void do_IRQ(struct pt_regs *regs);
  32
  33 /** FIXME - not implement
  34  * irq_dispose_mapping - Unmap an interrupt
  35  * @virq: linux virq number of the interrupt to unmap
  36  */
  37 static inline void irq_dispose_mapping(unsigned int virq)
  38 {
  39         return;
  40 }
  41
  42 struct irq_host;
  43
  44 /**
  45  * irq_create_mapping - Map a hardware interrupt into linux virq space
  46  * @host: host owning this hardware interrupt or NULL for default host
  47  * @hwirq: hardware irq number in that host space
  48  *
  49  * Only one mapping per hardware interrupt is permitted. Returns a linux
  50  * virq number.
  51  * If the sense/trigger is to be specified, set_irq_type() should be called
  52  * on the number returned from that call.
  53  */
  54 extern unsigned int irq_create_mapping(struct irq_host *host,
  55                                         irq_hw_number_t hwirq);
  56
  57 #endif /* _ASM_MICROBLAZE_IRQ_H */