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-rw-r--r--arch/arm/mach-s3c2410/irq.h99
1 files changed, 99 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c2410/irq.h b/arch/arm/mach-s3c2410/irq.h
new file mode 100644
index 000000000000..4abf0ca14e00
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+++ b/arch/arm/mach-s3c2410/irq.h
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1/* arch/arm/mach-s3c2410/irq.h
2 *
3 * Copyright (c) 2004-2005 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 *
6 * Header file for S3C24XX CPU IRQ support
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * Modifications:
13*/
14
15#define irqdbf(x...)
16#define irqdbf2(x...)
17
18#define EXTINT_OFF (IRQ_EINT4 - 4)
19
20extern struct irqchip s3c_irq_level_chip;
21
22static inline void
23s3c_irqsub_mask(unsigned int irqno, unsigned int parentbit,
24 int subcheck)
25{
26 unsigned long mask;
27 unsigned long submask;
28
29 submask = __raw_readl(S3C2410_INTSUBMSK);
30 mask = __raw_readl(S3C2410_INTMSK);
31
32 submask |= (1UL << (irqno - IRQ_S3CUART_RX0));
33
34 /* check to see if we need to mask the parent IRQ */
35
36 if ((submask & subcheck) == subcheck) {
37 __raw_writel(mask | parentbit, S3C2410_INTMSK);
38 }
39
40 /* write back masks */
41 __raw_writel(submask, S3C2410_INTSUBMSK);
42
43}
44
45static inline void
46s3c_irqsub_unmask(unsigned int irqno, unsigned int parentbit)
47{
48 unsigned long mask;
49 unsigned long submask;
50
51 submask = __raw_readl(S3C2410_INTSUBMSK);
52 mask = __raw_readl(S3C2410_INTMSK);
53
54 submask &= ~(1UL << (irqno - IRQ_S3CUART_RX0));
55 mask &= ~parentbit;
56
57 /* write back masks */
58 __raw_writel(submask, S3C2410_INTSUBMSK);
59 __raw_writel(mask, S3C2410_INTMSK);
60}
61
62
63static inline void
64s3c_irqsub_maskack(unsigned int irqno, unsigned int parentmask, unsigned int group)
65{
66 unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
67
68 s3c_irqsub_mask(irqno, parentmask, group);
69
70 __raw_writel(bit, S3C2410_SUBSRCPND);
71
72 /* only ack parent if we've got all the irqs (seems we must
73 * ack, all and hope that the irq system retriggers ok when
74 * the interrupt goes off again)
75 */
76
77 if (1) {
78 __raw_writel(parentmask, S3C2410_SRCPND);
79 __raw_writel(parentmask, S3C2410_INTPND);
80 }
81}
82
83static inline void
84s3c_irqsub_ack(unsigned int irqno, unsigned int parentmask, unsigned int group)
85{
86 unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
87
88 __raw_writel(bit, S3C2410_SUBSRCPND);
89
90 /* only ack parent if we've got all the irqs (seems we must
91 * ack, all and hope that the irq system retriggers ok when
92 * the interrupt goes off again)
93 */
94
95 if (1) {
96 __raw_writel(parentmask, S3C2410_SRCPND);
97 __raw_writel(parentmask, S3C2410_INTPND);
98 }
99}