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 51 void arch_trigger_all_cpu_backtrace(bool); 52 #define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace 53 54 #endif /* _ASM_IRQ_H */ 55