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c6ba01a4c7
Support function for PCI. We don't use any advance mapping mechanism that's why implementation is simple. Signed-off-by: Michal Simek <monstr@monstr.eu>
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/*
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_MICROBLAZE_IRQ_H
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#define _ASM_MICROBLAZE_IRQ_H
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#define NR_IRQS 32
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#include <asm-generic/irq.h>
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#include <linux/interrupt.h>
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/* This type is the placeholder for a hardware interrupt number. It has to
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* be big enough to enclose whatever representation is used by a given
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* platform.
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*/
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typedef unsigned long irq_hw_number_t;
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extern unsigned int nr_irq;
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#define NO_IRQ (-1)
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struct pt_regs;
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extern void do_IRQ(struct pt_regs *regs);
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/**
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* irq_of_parse_and_map - Parse and Map an interrupt into linux virq space
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* @device: Device node of the device whose interrupt is to be mapped
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* @index: Index of the interrupt to map
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*
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* This function is a wrapper that chains of_irq_map_one() and
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* irq_create_of_mapping() to make things easier to callers
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*/
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struct device_node;
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extern unsigned int irq_of_parse_and_map(struct device_node *dev, int index);
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/** FIXME - not implement
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* irq_dispose_mapping - Unmap an interrupt
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* @virq: linux virq number of the interrupt to unmap
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*/
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static inline void irq_dispose_mapping(unsigned int virq)
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{
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return;
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}
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struct irq_host;
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/**
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* irq_create_mapping - Map a hardware interrupt into linux virq space
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* @host: host owning this hardware interrupt or NULL for default host
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* @hwirq: hardware irq number in that host space
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*
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* Only one mapping per hardware interrupt is permitted. Returns a linux
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* virq number.
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* If the sense/trigger is to be specified, set_irq_type() should be called
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* on the number returned from that call.
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*/
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extern unsigned int irq_create_mapping(struct irq_host *host,
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irq_hw_number_t hwirq);
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/**
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* irq_create_of_mapping - Map a hardware interrupt into linux virq space
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* @controller: Device node of the interrupt controller
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* @inspec: Interrupt specifier from the device-tree
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* @intsize: Size of the interrupt specifier from the device-tree
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*
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* This function is identical to irq_create_mapping except that it takes
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* as input informations straight from the device-tree (typically the results
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* of the of_irq_map_*() functions.
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*/
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extern unsigned int irq_create_of_mapping(struct device_node *controller,
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u32 *intspec, unsigned int intsize);
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#endif /* _ASM_MICROBLAZE_IRQ_H */
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