arch/mips/include/asm/irq.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
   7  * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
   8  */
   9 #ifndef _ASM_IRQ_H
  10 #define _ASM_IRQ_H
  11
  12 #include <linux/linkage.h>
  13 #include <linux/smp.h>
  14 #include <linux/irqdomain.h>
  15
  16 #include <asm/mipsmtregs.h>
  17
  18 #include <irq.h>
  19
  20 #ifdef CONFIG_I8259
  21 static inline int irq_canonicalize(int irq)
  22 {
  23         return ((irq == I8259A_IRQ_BASE + 2) ? I8259A_IRQ_BASE + 9 : irq);
  24 }
  25 #else
  26 #define irq_canonicalize(irq) (irq)     /* Sane hardware, sane code ... */
  27 #endif
  28
  29 asmlinkage void plat_irq_dispatch(void);
  30
  31 extern void do_IRQ(unsigned int irq);
  32
  33 extern void arch_init_irq(void);
  34 extern void spurious_interrupt(void);
  35
  36 extern int allocate_irqno(void);
  37 extern void alloc_legacy_irqno(void);
  38 extern void free_irqno(unsigned int irq);
  39
  40 /*
  41  * Before R2 the timer and performance counter interrupts were both fixed to
  42  * IE7.  Since R2 their number has to be read from the c0_intctl register.
  43  */
  44 #define CP0_LEGACY_COMPARE_IRQ 7
  45 #define CP0_LEGACY_PERFCNT_IRQ 7
  46
  47 extern int cp0_compare_irq;
  48 extern int cp0_compare_irq_shift;
  49 extern int cp0_perfcount_irq;
  50 extern int cp0_fdc_irq;
  51
  52 extern int get_c0_fdc_int(void);
  53
  54 void arch_trigger_all_cpu_backtrace(bool);
  55 #define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
  56
  57 #endif /* _ASM_IRQ_H */