arch/c6x/include/asm/irq.h

   1 /*
   2  *  Port on Texas Instruments TMS320C6x architecture
   3  *
   4  *  Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
   5  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
   6  *
   7  *  Large parts taken directly from powerpc.
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License version 2 as
  11  *  published by the Free Software Foundation.
  12  */
  13 #ifndef _ASM_C6X_IRQ_H
  14 #define _ASM_C6X_IRQ_H
  15
  16 #include <linux/irqdomain.h>
  17 #include <linux/threads.h>
  18 #include <linux/list.h>
  19 #include <linux/radix-tree.h>
  20 #include <asm/percpu.h>
  21
  22 #define irq_canonicalize(irq)  (irq)
  23
  24 /*
  25  * The C64X+ core has 16 IRQ vectors. One each is used by Reset and NMI. Two
  26  * are reserved. The remaining 12 vectors are used to route SoC interrupts.
  27  * These interrupt vectors are prioritized with IRQ 4 having the highest
  28  * priority and IRQ 15 having the lowest.
  29  *
  30  * The C64x+ megamodule provides a PIC which combines SoC IRQ sources into a
  31  * single core IRQ vector. There are four combined sources, each of which
  32  * feed into one of the 12 general interrupt vectors. The remaining 8 vectors
  33  * can each route a single SoC interrupt directly.
  34  */
  35 #define NR_PRIORITY_IRQS 16
  36
  37 /* Total number of virq in the platform */
  38 #define NR_IRQS         256
  39
  40 /* This number is used when no interrupt has been assigned */
  41 #define NO_IRQ          0
  42
  43 extern void __init init_pic_c64xplus(void);
  44
  45 extern void init_IRQ(void);
  46
  47 struct pt_regs;
  48
  49 extern asmlinkage void c6x_do_IRQ(unsigned int prio, struct pt_regs *regs);
  50
  51 extern unsigned long irq_err_count;
  52
  53 #endif /* _ASM_C6X_IRQ_H */