irq_threads.h File Reference

IRQ threads API. More...

#include "globals.h"

Go to the source code of this file.

Functions
int	attach_irqs (void)
	Initialize the local irq acceptor threads.
void	check_auto_consume (int irq, client_chain *c)
	Checks if the given client is a candidate for auto-consuming an irq.
void	irq_handler (int num)
	Handler function for one irq.

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Detailed Description

IRQ threads API.

Date:

2007-04-27

Author:

Jork Loeser <jork.loeser@inf.tu-dresden.de>

Christian Helmuth <ch12@os.inf.tu-dresden.de>

Definition in file irq_threads.h.

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Function Documentation

int attach_irqs

(

void

)

Initialize the local irq acceptor threads.

This function will attach to all irqs possible and initialize the corresponding structures. At the standard-pc-x86 architecture, we have irqs 0 to 15. Try to attach to all of them. This is done by creating 16 threads, one per irq. Threads start at lthread+1.

create_threads_sync() is external to allow overloading in other pkgs.

Definition at line 519 of file irq_threads.c.

void check_auto_consume	(	int	irq,
		client_chain *	c
	)

Checks if the given client is a candidate for auto-consuming an irq.

Auto-consuming is possible, if:

• the client is marked as in service (got a notification)
• the clients's occurence-number matches that of the IRQ
• the IRQ is in service
• this client was the last (i.e., the number if waiting clients = 1)

Maybe some of the conditions follow from others.

Precondition:

The irq-mutex must be hold outside.

Definition at line 201 of file irq_threads.c.

void irq_handler

(

int

num

)

Handler function for one irq.

After calling attach_irq(), return an IPC to the management thread and wait for incoming IRQs.

Definition at line 410 of file irq_threads.c.