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