WebSVN – HelenOS – Blame – /branches/rcu/kernel/generic/include/ddi/irq.h

Rev	Author	Line No.	Line
2292	hudecek	1	/*
		2	* Copyright (c) 2006 Jakub Jermar
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
		29	/** @addtogroup genericddi
		30	* @{
		31	*/
		32	/** @file
		33	*/
		34
		35	#ifndef KERN_IRQ_H_
		36	#define KERN_IRQ_H_
		37
		38	typedef enum {
		39	CMD_MEM_READ_1 = 0,
		40	CMD_MEM_READ_2,
		41	CMD_MEM_READ_4,
		42	CMD_MEM_READ_8,
		43	CMD_MEM_WRITE_1,
		44	CMD_MEM_WRITE_2,
		45	CMD_MEM_WRITE_4,
		46	CMD_MEM_WRITE_8,
		47	CMD_PORT_READ_1,
		48	CMD_PORT_WRITE_1,
		49	CMD_IA64_GETCHAR,
		50	CMD_PPC32_GETCHAR,
		51	CMD_LAST
		52	} irq_cmd_type;
		53
		54	typedef struct {
		55	irq_cmd_type cmd;
		56	void *addr;
		57	unsigned long long value;
		58	int dstarg;
		59	} irq_cmd_t;
		60
		61	typedef struct {
		62	unsigned int cmdcount;
		63	irq_cmd_t *cmds;
		64	} irq_code_t;
		65
		66	#ifdef KERNEL
		67
		68	#include <arch/types.h>
		69	#include <adt/list.h>
		70	#include <synch/spinlock.h>
		71	#include <proc/task.h>
		72
		73	typedef enum {
		74	IRQ_DECLINE, /*< Decline to service. /
		75	IRQ_ACCEPT /*< Accept to service. /
		76	} irq_ownership_t;
		77
		78	typedef enum {
		79	IRQ_TRIGGER_LEVEL = 1,
		80	IRQ_TRIGGER_EDGE
		81	} irq_trigger_t;
		82
		83	struct irq;
		84	typedef void (* irq_handler_t)(struct irq irq, void arg, ...);
		85
		86	/** IPC notification config structure.
		87	*
		88	* Primarily, this structure is encapsulated in the irq_t structure.
		89	* It is protected by irq_t::lock.
		90	*/
		91	typedef struct {
		92	/** When false, notifications are not sent. */
		93	bool notify;
		94	/** Answerbox for notifications. */
		95	answerbox_t *answerbox;
		96	/** Method to be used for the notification. */
		97	unative_t method;
		98	/** Top-half pseudocode. */
		99	irq_code_t *code;
		100	/** Counter. */
		101	count_t counter;
		102	/**
		103	* Link between IRQs that are notifying the same answerbox. The list is
		104	* protected by the answerbox irq_lock.
		105	*/
		106	link_t link;
		107	} ipc_notif_cfg_t;
		108
		109	/** Structure representing one device IRQ.
		110	*
		111	* If one device has multiple interrupts, there will be multiple irq_t
		112	* instantions with the same devno.
		113	*/
		114	typedef struct irq {
		115	/** Hash table link. */
		116	link_t link;
		117
		118	/** Lock protecting everything in this structure
		119	* except the link member. When both the IRQ
		120	* hash table lock and this lock are to be acquired,
		121	* this lock must not be taken first.
		122	*/
		123	SPINLOCK_DECLARE(lock);
2307	hudecek	124
		125	/** Send EOI before processing the interrupt.
		126	* This is essential for timer interrupt which
		127	* has to be acknowledged before doing preemption
		128	* to make sure another timer interrupt will
		129	* be eventually generated.
		130	*/
		131	bool preack;
2292	hudecek	132
		133	/** Unique device number. -1 if not yet assigned. */
		134	devno_t devno;
		135
		136	/** Actual IRQ number. -1 if not yet assigned. */
		137	inr_t inr;
2307	hudecek	138	/** Trigger level of the IRQ. */
2292	hudecek	139	irq_trigger_t trigger;
		140	/** Claim ownership of the IRQ. */
		141	irq_ownership_t (* claim)(void);
		142	/** Handler for this IRQ and device. */
		143	irq_handler_t handler;
		144	/** Argument for the handler. */
		145	void *arg;
		146
		147	/** Notification configuration structure. */
		148	ipc_notif_cfg_t notif_cfg;
		149	} irq_t;
		150
		151	extern void irq_init(count_t inrs, count_t chains);
		152	extern void irq_initialize(irq_t *irq);
		153	extern void irq_register(irq_t *irq);
		154	extern irq_t *irq_dispatch_and_lock(inr_t inr);
		155	extern irq_t *irq_find_and_lock(inr_t inr, devno_t devno);
		156
		157	#endif
		158
		159	#endif
		160
		161	/** @}
		162	*/

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(root)/branches/rcu/kernel/generic/include/ddi/irq.h – Rev 2307