diff options
Diffstat (limited to 'arch/mips/kernel/irq_cpu.c')
| -rw-r--r-- | arch/mips/kernel/irq_cpu.c | 50 |
1 files changed, 46 insertions, 4 deletions
diff --git a/arch/mips/kernel/irq_cpu.c b/arch/mips/kernel/irq_cpu.c index 972263bcf403..72ef2d25cbf2 100644 --- a/arch/mips/kernel/irq_cpu.c +++ b/arch/mips/kernel/irq_cpu.c @@ -3,13 +3,13 @@ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net * * Copyright (C) 2001 Ralf Baechle - * Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved. - * Author: Maciej W. Rozycki <macro@mips.com> + * Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved. + * Author: Maciej W. Rozycki <macro@mips.com> * * This file define the irq handler for MIPS CPU interrupts. * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ @@ -31,6 +31,7 @@ #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/irq.h> +#include <linux/irqdomain.h> #include <asm/irq_cpu.h> #include <asm/mipsregs.h> @@ -113,3 +114,44 @@ void __init mips_cpu_irq_init(void) irq_set_chip_and_handler(i, &mips_cpu_irq_controller, handle_percpu_irq); } + +#ifdef CONFIG_IRQ_DOMAIN +static int mips_cpu_intc_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) +{ + static struct irq_chip *chip; + + if (hw < 2 && cpu_has_mipsmt) { + /* Software interrupts are used for MT/CMT IPI */ + chip = &mips_mt_cpu_irq_controller; + } else { + chip = &mips_cpu_irq_controller; + } + + irq_set_chip_and_handler(irq, chip, handle_percpu_irq); + + return 0; +} + +static const struct irq_domain_ops mips_cpu_intc_irq_domain_ops = { + .map = mips_cpu_intc_map, + .xlate = irq_domain_xlate_onecell, +}; + +int __init mips_cpu_intc_init(struct device_node *of_node, + struct device_node *parent) +{ + struct irq_domain *domain; + + /* Mask interrupts. */ + clear_c0_status(ST0_IM); + clear_c0_cause(CAUSEF_IP); + + domain = irq_domain_add_legacy(of_node, 8, MIPS_CPU_IRQ_BASE, 0, + &mips_cpu_intc_irq_domain_ops, NULL); + if (!domain) + panic("Failed to add irqdomain for MIPS CPU\n"); + + return 0; +} +#endif /* CONFIG_IRQ_DOMAIN */ |