| /* | |
| * This file is subject to the terms and conditions of the GNU General Public | |
| * License. See the file "COPYING" in the main directory of this archive | |
| * for more details. | |
| * | |
| * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle | |
| * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle | |
| */ | |
| #ifndef _ASM_IRQ_H | |
| #define _ASM_IRQ_H | |
| #include <linux/linkage.h> | |
| #include <linux/smp.h> | |
| #include <linux/irqdomain.h> | |
| #include <asm/mipsmtregs.h> | |
| #include <irq.h> | |
| #define IRQ_STACK_SIZE THREAD_SIZE | |
| #define IRQ_STACK_START (IRQ_STACK_SIZE - 16) | |
| extern void *irq_stack[NR_CPUS]; | |
| /* | |
| * The highest address on the IRQ stack contains a dummy frame put down in | |
| * genex.S (handle_int & except_vec_vi_handler) which is structured as follows: | |
| * | |
| * top ------------ | |
| * | task sp | <- irq_stack[cpu] + IRQ_STACK_START | |
| * ------------ | |
| * | | <- First frame of IRQ context | |
| * ------------ | |
| * | |
| * task sp holds a copy of the task stack pointer where the struct pt_regs | |
| * from exception entry can be found. | |
| */ | |
| static inline bool on_irq_stack(int cpu, unsigned long sp) | |
| { | |
| unsigned long low = (unsigned long)irq_stack[cpu]; | |
| unsigned long high = low + IRQ_STACK_SIZE; | |
| return (low <= sp && sp <= high); | |
| } | |
| #ifdef CONFIG_I8259 | |
| static inline int irq_canonicalize(int irq) | |
| { | |
| return ((irq == I8259A_IRQ_BASE + 2) ? I8259A_IRQ_BASE + 9 : irq); | |
| } | |
| #else | |
| #define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */ | |
| #endif | |
| asmlinkage void plat_irq_dispatch(void); | |
| extern void do_IRQ(unsigned int irq); | |
| extern void arch_init_irq(void); | |
| extern void spurious_interrupt(void); | |
| extern int allocate_irqno(void); | |
| extern void alloc_legacy_irqno(void); | |
| extern void free_irqno(unsigned int irq); | |
| /* | |
| * Before R2 the timer and performance counter interrupts were both fixed to | |
| * IE7. Since R2 their number has to be read from the c0_intctl register. | |
| */ | |
| #define CP0_LEGACY_COMPARE_IRQ 7 | |
| #define CP0_LEGACY_PERFCNT_IRQ 7 | |
| extern int cp0_compare_irq; | |
| extern int cp0_compare_irq_shift; | |
| extern int cp0_perfcount_irq; | |
| extern int cp0_fdc_irq; | |
| extern int get_c0_fdc_int(void); | |
| void arch_trigger_cpumask_backtrace(const struct cpumask *mask, | |
| bool exclude_self); | |
| #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace | |
| #endif /* _ASM_IRQ_H */ |