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 #define IRQ_STACK_SIZE THREAD_SIZE 21 22 extern void *irq_stack[NR_CPUS]; 23 24 static inline bool on_irq_stack(int cpu, unsigned long sp) 25 { 26 unsigned long low = (unsigned long)irq_stack[cpu]; 27 unsigned long high = low + IRQ_STACK_SIZE; 28 29 return (low <= sp && sp <= high); 30 } 31 32 #ifdef CONFIG_I8259 33 static inline int irq_canonicalize(int irq) 34 { 35 return ((irq == I8259A_IRQ_BASE + 2) ? I8259A_IRQ_BASE + 9 : irq); 36 } 37 #else 38 #define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */ 39 #endif 40 41 asmlinkage void plat_irq_dispatch(void); 42 43 extern void do_IRQ(unsigned int irq); 44 45 extern void arch_init_irq(void); 46 extern void spurious_interrupt(void); 47 48 extern int allocate_irqno(void); 49 extern void alloc_legacy_irqno(void); 50 extern void free_irqno(unsigned int irq); 51 52 /* 53 * Before R2 the timer and performance counter interrupts were both fixed to 54 * IE7. Since R2 their number has to be read from the c0_intctl register. 55 */ 56 #define CP0_LEGACY_COMPARE_IRQ 7 57 #define CP0_LEGACY_PERFCNT_IRQ 7 58 59 extern int cp0_compare_irq; 60 extern int cp0_compare_irq_shift; 61 extern int cp0_perfcount_irq; 62 extern int cp0_fdc_irq; 63 64 extern int get_c0_fdc_int(void); 65 66 void arch_trigger_cpumask_backtrace(const struct cpumask *mask, 67 bool exclude_self); 68 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace 69 70 #endif /* _ASM_IRQ_H */ 71