1 /* 2 * Copyright (C) 2003 Ralf Baechle 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the 6 * Free Software Foundation; either version 2 of the License, or (at your 7 * option) any later version. 8 * 9 * Handler for RM7000 extended interrupts. These are a non-standard 10 * feature so we handle them separately from standard interrupts. 11 */ 12 #include <linux/init.h> 13 #include <linux/interrupt.h> 14 #include <linux/irq.h> 15 #include <linux/kernel.h> 16 17 #include <asm/irq_cpu.h> 18 #include <asm/mipsregs.h> 19 #include <asm/system.h> 20 unmask_rm7k_irq(struct irq_data * d)21static inline void unmask_rm7k_irq(struct irq_data *d) 22 { 23 set_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE)); 24 } 25 mask_rm7k_irq(struct irq_data * d)26static inline void mask_rm7k_irq(struct irq_data *d) 27 { 28 clear_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE)); 29 } 30 31 static struct irq_chip rm7k_irq_controller = { 32 .name = "RM7000", 33 .irq_ack = mask_rm7k_irq, 34 .irq_mask = mask_rm7k_irq, 35 .irq_mask_ack = mask_rm7k_irq, 36 .irq_unmask = unmask_rm7k_irq, 37 .irq_eoi = unmask_rm7k_irq 38 }; 39 rm7k_cpu_irq_init(void)40void __init rm7k_cpu_irq_init(void) 41 { 42 int base = RM7K_CPU_IRQ_BASE; 43 int i; 44 45 clear_c0_intcontrol(0x00000f00); /* Mask all */ 46 47 for (i = base; i < base + 4; i++) 48 irq_set_chip_and_handler(i, &rm7k_irq_controller, 49 handle_percpu_irq); 50 } 51