/* * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar * Copyright (C) 2005-2006, Thomas Gleixner, Russell King * * This file contains the dummy interrupt chip implementation */ #include <linux/interrupt.h> #include <linux/irq.h> #include "internals.h" /* * What should we do if we get a hw irq event on an illegal vector? * Each architecture has to answer this themself. */ static void ack_bad(struct irq_data *data) { struct irq_desc *desc = irq_data_to_desc(data); print_irq_desc(data->irq, desc); ack_bad_irq(data->irq); } /* * NOP functions */ static void noop(struct irq_data *data) { } static unsigned int noop_ret(struct irq_data *data) { return 0; } /* * Generic no controller implementation */ struct irq_chip no_irq_chip = { .name = "none", .irq_startup = noop_ret, .irq_shutdown = noop, .irq_enable = noop, .irq_disable = noop, .irq_ack = ack_bad, }; /* * Generic dummy implementation which can be used for * real dumb interrupt sources */ struct irq_chip dummy_irq_chip = { .name = "dummy", .irq_startup = noop_ret, .irq_shutdown = noop, .irq_enable = noop, .irq_disable = noop, .irq_ack = noop, .irq_mask = noop, .irq_unmask = noop, };