103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
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* linux/include/asm-parisc/irq.h
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*
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* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar,
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* Copyright 1999 SuSE GmbH
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*
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* IRQ/IPI changes taken from work by Thomas Radke
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* <tomsoft@informatik.tu-chemnitz.de>
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*/
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#ifndef _ASM_PARISC_IRQ_H
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#define _ASM_PARISC_IRQ_H
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#include <asm/ptrace.h>
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#include <asm/types.h>
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#include <asm/errno.h>
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#include <linux/string.h>
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#include <linux/interrupt.h>
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#include <linux/config.h>
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#define CPU_IRQ_REGION 1
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#define TIMER_IRQ (IRQ_FROM_REGION(CPU_IRQ_REGION) | 0)
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#define IPI_IRQ (IRQ_FROM_REGION(CPU_IRQ_REGION) | 1)
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/* This should be 31 for PA1.1 binaries and 63 for PA-2.0 wide mode */
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#define MAX_CPU_IRQ (BITS_PER_LONG - 1)
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#if BITS_PER_LONG == 32
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# define IRQ_REGION_SHIFT 5
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#else
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# define IRQ_REGION_SHIFT 6
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#endif
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#define IRQ_PER_REGION (1 << IRQ_REGION_SHIFT)
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#define NR_IRQ_REGS 16
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#define NR_IRQS (NR_IRQ_REGS * IRQ_PER_REGION)
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#define IRQ_REGION(irq) ((irq) >> IRQ_REGION_SHIFT)
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#define IRQ_OFFSET(irq) ((irq) & ((1<<IRQ_REGION_SHIFT)-1))
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#define IRQ_FROM_REGION(reg) ((reg) << IRQ_REGION_SHIFT)
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#define EISA_IRQ_REGION 0 /* region 0 needs to be reserved for EISA */
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#define EISA_MAX_IRQS 16 /* max. (E)ISA irq line */
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struct irq_region_ops {
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void (*disable_irq)(void *dev, int irq);
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void (* enable_irq)(void *dev, int irq);
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void (* mask_irq)(void *dev, int irq);
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void (* unmask_irq)(void *dev, int irq);
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};
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struct irq_region_data {
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void *dev;
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const char *name;
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int irqbase;
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unsigned int status[IRQ_PER_REGION]; /* IRQ status */
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};
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struct irq_region {
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struct irq_region_ops ops;
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struct irq_region_data data;
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struct irqaction *action;
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};
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extern struct irq_region *irq_region[NR_IRQ_REGS];
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static __inline__ int irq_canonicalize(int irq)
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{
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#ifdef CONFIG_EISA
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return (irq == (IRQ_FROM_REGION(EISA_IRQ_REGION)+2)
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? (IRQ_FROM_REGION(EISA_IRQ_REGION)+9) : irq);
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#else
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return irq;
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#endif
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}
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extern void disable_irq(int);
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#define disable_irq_nosync(i) disable_irq(i)
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extern void enable_irq(int);
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extern void do_irq(struct irqaction *a, int i, struct pt_regs *p);
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extern void do_irq_mask(unsigned long mask, struct irq_region *region,
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struct pt_regs *regs);
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extern struct irq_region *alloc_irq_region(int count, struct irq_region_ops *ops,
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const char *name, void *dev);
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extern int txn_alloc_irq(void);
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extern int txn_claim_irq(int);
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extern unsigned int txn_alloc_data(int, unsigned int);
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extern unsigned long txn_alloc_addr(int);
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/* soft power switch support (power.c) */
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extern struct tasklet_struct power_tasklet;
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struct irqaction;
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int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
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#endif /* _ASM_PARISC_IRQ_H */
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