/* * linux/arch/arm/mach-anakin/irq.c * * Copyright (C) 2001 Aleph One Ltd. for Acunia N.V. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Changelog: * 10-Apr-2001 TTC Created */ #include <linux/ptrace.h> #include <linux/interrupt.h> #include <linux/init.h> #include <asm/irq.h> #include <asm/mach/irq.h> extern unsigned int anakin_irq_mask, anakin_active_irqs; extern void do_IRQ(int, struct pt_regs *); static void anakin_mask_irq(unsigned int irq) { anakin_irq_mask &= ~(1 << irq); } static void anakin_unmask_irq(unsigned int irq) { anakin_irq_mask |= (1 << irq); } /* * This is a faked interrupt to deal with parallel interrupt requests * on the Anakin. Make sure that its interrupt number is not in any * way conflicting with the hardware interrupt numbers! Check * IRQ_ANAKIN in linux/include/asm-arm/arch-anakin/irqs.h. */ static void anakin_interrupt(int irq, void *dev_id, struct pt_regs *regs) { for (irq = 0; irq < NR_IRQS; irq++) if (anakin_active_irqs & (1 << irq)) do_IRQ(irq, regs); } static struct irqaction anakin_irq = { .name = "Anakin IRQ", .handler = anakin_interrupt, .flags = SA_INTERRUPT }; void __init irq_init_irq(void) { unsigned int irq; for (irq = 0; irq < NR_IRQS; irq++) { switch (irq) { case IRQ_UART0: case IRQ_UART1: case IRQ_UART2: case IRQ_TICK: case IRQ_CODEC: case IRQ_UART4: case IRQ_TOUCHSCREEN: case IRQ_UART3: case IRQ_FIFO: case IRQ_CAN: case IRQ_COMPACTFLASH: case IRQ_BOSH: case IRQ_ANAKIN: irq_desc[irq].valid = 1; irq_desc[irq].mask_ack = anakin_mask_irq; irq_desc[irq].mask = anakin_mask_irq; irq_desc[irq].unmask = anakin_unmask_irq; } } setup_arm_irq(IRQ_ANAKIN, &anakin_irq); }