Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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/kernel.h> |
| 15 | |
| 16 | #include <asm/irq_cpu.h> |
| 17 | #include <asm/mipsregs.h> |
| 18 | #include <asm/system.h> |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | static inline void unmask_rm7k_irq(unsigned int irq) |
| 21 | { |
Atsushi Nemoto | 97dcb82 | 2007-01-08 02:14:29 +0900 | [diff] [blame] | 22 | set_c0_intcontrol(0x100 << (irq - RM7K_CPU_IRQ_BASE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | } |
| 24 | |
| 25 | static inline void mask_rm7k_irq(unsigned int irq) |
| 26 | { |
Atsushi Nemoto | 97dcb82 | 2007-01-08 02:14:29 +0900 | [diff] [blame] | 27 | clear_c0_intcontrol(0x100 << (irq - RM7K_CPU_IRQ_BASE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | } |
| 29 | |
Ralf Baechle | 94dee17 | 2006-07-02 14:41:42 +0100 | [diff] [blame] | 30 | static struct irq_chip rm7k_irq_controller = { |
Atsushi Nemoto | 70d21cd | 2007-01-15 00:07:25 +0900 | [diff] [blame] | 31 | .name = "RM7000", |
Atsushi Nemoto | 1603b5a | 2006-11-02 02:08:36 +0900 | [diff] [blame] | 32 | .ack = mask_rm7k_irq, |
| 33 | .mask = mask_rm7k_irq, |
| 34 | .mask_ack = mask_rm7k_irq, |
| 35 | .unmask = unmask_rm7k_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | }; |
| 37 | |
Atsushi Nemoto | 97dcb82 | 2007-01-08 02:14:29 +0900 | [diff] [blame] | 38 | void __init rm7k_cpu_irq_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | { |
Atsushi Nemoto | 97dcb82 | 2007-01-08 02:14:29 +0900 | [diff] [blame] | 40 | int base = RM7K_CPU_IRQ_BASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | int i; |
| 42 | |
| 43 | clear_c0_intcontrol(0x00000f00); /* Mask all */ |
| 44 | |
Atsushi Nemoto | 1603b5a | 2006-11-02 02:08:36 +0900 | [diff] [blame] | 45 | for (i = base; i < base + 4; i++) |
Atsushi Nemoto | 1417836 | 2006-11-14 01:13:18 +0900 | [diff] [blame] | 46 | set_irq_chip_and_handler(i, &rm7k_irq_controller, |
| 47 | handle_level_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | } |