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/* * linux/include/asm-arm/arch-ebsa110/irq.h * * Copyright (C) 1996-1998 Russell King * * 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: * 22-08-1998 RMK Restructured IRQ routines */ #define IRQ_MCLR ((volatile unsigned char *)0xf3000000) #define IRQ_MSET ((volatile unsigned char *)0xf2c00000) #define IRQ_MASK ((volatile unsigned char *)0xf2c00000) #define fixup_irq(x) (x) static void ebsa110_mask_and_ack_irq(unsigned int irq) { *IRQ_MCLR = 1 << irq; } static void ebsa110_mask_irq(unsigned int irq) { *IRQ_MCLR = 1 << irq; } static void ebsa110_unmask_irq(unsigned int irq) { *IRQ_MSET = 1 << irq; } static __inline__ void irq_init_irq(void) { unsigned long flags; int irq; save_flags_cli (flags); *IRQ_MCLR = 0xff; *IRQ_MSET = 0x55; *IRQ_MSET = 0x00; if (*IRQ_MASK != 0x55) while (1); *IRQ_MCLR = 0xff; /* clear all interrupt enables */ restore_flags (flags); for (irq = 0; irq < NR_IRQS; irq++) { irq_desc[irq].valid = 1; irq_desc[irq].probe_ok = 1; irq_desc[irq].mask_ack = ebsa110_mask_and_ack_irq; irq_desc[irq].mask = ebsa110_mask_irq; irq_desc[irq].unmask = ebsa110_unmask_irq; } } |