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 | |
| 20 | static int irq_base; |
| 21 | |
| 22 | static inline void unmask_rm7k_irq(unsigned int irq) |
| 23 | { |
| 24 | set_c0_intcontrol(0x100 << (irq - irq_base)); |
| 25 | } |
| 26 | |
| 27 | static inline void mask_rm7k_irq(unsigned int irq) |
| 28 | { |
| 29 | clear_c0_intcontrol(0x100 << (irq - irq_base)); |
| 30 | } |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | static void rm7k_cpu_irq_end(unsigned int irq) |
| 33 | { |
| 34 | if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) |
| 35 | unmask_rm7k_irq(irq); |
| 36 | } |
| 37 | |
Ralf Baechle | 94dee17 | 2006-07-02 14:41:42 +0100 | [diff] [blame] | 38 | static struct irq_chip rm7k_irq_controller = { |
Ralf Baechle | 8ab00b9 | 2005-02-28 13:39:57 +0000 | [diff] [blame] | 39 | .typename = "RM7000", |
Atsushi Nemoto | 1603b5a | 2006-11-02 02:08:36 +0900 | [diff] [blame^] | 40 | .ack = mask_rm7k_irq, |
| 41 | .mask = mask_rm7k_irq, |
| 42 | .mask_ack = mask_rm7k_irq, |
| 43 | .unmask = unmask_rm7k_irq, |
Ralf Baechle | 8ab00b9 | 2005-02-28 13:39:57 +0000 | [diff] [blame] | 44 | .end = rm7k_cpu_irq_end, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | }; |
| 46 | |
| 47 | void __init rm7k_cpu_irq_init(int base) |
| 48 | { |
| 49 | int i; |
| 50 | |
| 51 | clear_c0_intcontrol(0x00000f00); /* Mask all */ |
| 52 | |
Atsushi Nemoto | 1603b5a | 2006-11-02 02:08:36 +0900 | [diff] [blame^] | 53 | for (i = base; i < base + 4; i++) |
| 54 | set_irq_chip(i, &rm7k_irq_controller); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | irq_base = base; |
| 57 | } |