diff options
Diffstat (limited to 'include/asm-arm26/irqchip.h')
| -rw-r--r-- | include/asm-arm26/irqchip.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/include/asm-arm26/irqchip.h b/include/asm-arm26/irqchip.h new file mode 100644 index 000000000000..6a007a954098 --- /dev/null +++ b/include/asm-arm26/irqchip.h @@ -0,0 +1,101 @@ +/* + * 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); + /* + * Re-run the IRQ + */ + void (*rerun)(unsigned int); + /* + * Set the type of the IRQ. + */ + int (*type)(unsigned int, unsigned int); +}; + +struct irqdesc { + irq_handler_t handle; + struct irqchip *chip; + struct irqaction *action; + + unsigned int enabled : 1; /* IRQ is currently enabled */ + 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 :23; + unsigned int depth; /* disable depth */ + + /* + * IRQ lock detection + */ + unsigned int lck_cnt; + unsigned int lck_pc; + unsigned int lck_jif; +}; + +extern struct irqdesc irq_desc[]; + +/* + * 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) + +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 |
