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1da177e4 LT |
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 | ||
94dee171 | 32 | static struct irq_chip rm7k_irq_controller = { |
8ab00b9a | 33 | .typename = "RM7000", |
1603b5ac AN |
34 | .ack = mask_rm7k_irq, |
35 | .mask = mask_rm7k_irq, | |
36 | .mask_ack = mask_rm7k_irq, | |
37 | .unmask = unmask_rm7k_irq, | |
1da177e4 LT |
38 | }; |
39 | ||
40 | void __init rm7k_cpu_irq_init(int base) | |
41 | { | |
42 | int i; | |
43 | ||
44 | clear_c0_intcontrol(0x00000f00); /* Mask all */ | |
45 | ||
1603b5ac | 46 | for (i = base; i < base + 4; i++) |
1417836e AN |
47 | set_irq_chip_and_handler(i, &rm7k_irq_controller, |
48 | handle_level_irq); | |
1da177e4 LT |
49 | |
50 | irq_base = base; | |
51 | } |