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128 lines
3.4 KiB
128 lines
3.4 KiB
20 years ago
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/*
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* linux/include/asm-arm/mach/irq.h
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*
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* Copyright (C) 1995-2000 Russell King.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_ARM_MACH_IRQ_H
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#define __ASM_ARM_MACH_IRQ_H
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struct irqdesc;
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struct pt_regs;
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struct seq_file;
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typedef void (*irq_handler_t)(unsigned int, struct irqdesc *, struct pt_regs *);
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typedef void (*irq_control_t)(unsigned int);
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struct irqchip {
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/*
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* Acknowledge the IRQ.
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* If this is a level-based IRQ, then it is expected to mask the IRQ
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* as well.
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*/
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void (*ack)(unsigned int);
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/*
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* Mask the IRQ in hardware.
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*/
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void (*mask)(unsigned int);
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/*
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* Unmask the IRQ in hardware.
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*/
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void (*unmask)(unsigned int);
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/*
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* Ask the hardware to re-trigger the IRQ.
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* Note: This method _must_ _not_ call the interrupt handler.
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* If you are unable to retrigger the interrupt, do not
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* provide a function, or if you do, return non-zero.
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*/
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int (*retrigger)(unsigned int);
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/*
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* Set the type of the IRQ.
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*/
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int (*type)(unsigned int, unsigned int);
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/*
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* Set wakeup-enable on the selected IRQ
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*/
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int (*wake)(unsigned int, unsigned int);
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#ifdef CONFIG_SMP
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/*
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* Route an interrupt to a CPU
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*/
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void (*set_cpu)(struct irqdesc *desc, unsigned int irq, unsigned int cpu);
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#endif
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};
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struct irqdesc {
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irq_handler_t handle;
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struct irqchip *chip;
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struct irqaction *action;
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struct list_head pend;
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void *chipdata;
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void *data;
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unsigned int disable_depth;
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unsigned int triggered: 1; /* IRQ has occurred */
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unsigned int running : 1; /* IRQ is running */
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unsigned int pending : 1; /* IRQ is pending */
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unsigned int probing : 1; /* IRQ in use for a probe */
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unsigned int probe_ok : 1; /* IRQ can be used for probe */
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unsigned int valid : 1; /* IRQ claimable */
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unsigned int noautoenable : 1; /* don't automatically enable IRQ */
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unsigned int unused :25;
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struct proc_dir_entry *procdir;
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#ifdef CONFIG_SMP
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cpumask_t affinity;
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unsigned int cpu;
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#endif
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/*
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* IRQ lock detection
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*/
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unsigned int lck_cnt;
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unsigned int lck_pc;
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unsigned int lck_jif;
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};
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extern struct irqdesc irq_desc[];
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/*
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* This is internal. Do not use it.
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*/
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extern void (*init_arch_irq)(void);
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extern void init_FIQ(void);
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extern int show_fiq_list(struct seq_file *, void *);
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void __set_irq_handler(unsigned int irq, irq_handler_t, int);
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/*
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* External stuff.
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*/
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#define set_irq_handler(irq,handler) __set_irq_handler(irq,handler,0)
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#define set_irq_chained_handler(irq,handler) __set_irq_handler(irq,handler,1)
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#define set_irq_data(irq,d) do { irq_desc[irq].data = d; } while (0)
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#define set_irq_chipdata(irq,d) do { irq_desc[irq].chipdata = d; } while (0)
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#define get_irq_chipdata(irq) (irq_desc[irq].chipdata)
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void set_irq_chip(unsigned int irq, struct irqchip *);
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void set_irq_flags(unsigned int irq, unsigned int flags);
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#define IRQF_VALID (1 << 0)
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#define IRQF_PROBE (1 << 1)
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#define IRQF_NOAUTOEN (1 << 2)
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/*
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* Built-in IRQ handlers.
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*/
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void do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
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void do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
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void do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
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void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
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void dummy_mask_unmask_irq(unsigned int irq);
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#endif
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