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 extern void do_IRQ(unsigned int irq); 30 31 extern void arch_init_irq(void); 32 extern void spurious_interrupt(void); 33 34 extern int allocate_irqno(void); 35 extern void alloc_legacy_irqno(void); 36 extern void free_irqno(unsigned int irq); 37 38 /* 39 * Before R2 the timer and performance counter interrupts were both fixed to 40 * IE7. Since R2 their number has to be read from the c0_intctl register. 41 */ 42 #define CP0_LEGACY_COMPARE_IRQ 7 43 #define CP0_LEGACY_PERFCNT_IRQ 7 44 45 extern int cp0_compare_irq; 46 extern int cp0_compare_irq_shift; 47 extern int cp0_perfcount_irq; 48 49 #endif /* _ASM_IRQ_H */ 50