irq.c (bacdf4809afade180a8f2171adb4cf7ec715d139) irq.c (abe11ddea1d759f9995a9a4636c28c9b40856ca8)
1/*
2 * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 */
9
10#include <linux/interrupt.h>
11#include <linux/module.h>
1/*
2 * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 */
9
10#include <linux/interrupt.h>
11#include <linux/module.h>
12#include <linux/of.h>
13#include <linux/irqdomain.h>
12#include <asm/sections.h>
13#include <asm/irq.h>
14
15/*
16 * Early Hardware specific Interrupt setup
17 * -Called very early (start_kernel -> setup_arch -> setup_processor)
18 * -Platform Independent (must for any ARC700)
19 * -Needed for each CPU (hence not foldable into init_IRQ)

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54}
55
56static struct irq_chip onchip_intc = {
57 .name = "ARC In-core Intc",
58 .irq_mask = arc_mask_irq,
59 .irq_unmask = arc_unmask_irq,
60};
61
14#include <asm/sections.h>
15#include <asm/irq.h>
16
17/*
18 * Early Hardware specific Interrupt setup
19 * -Called very early (start_kernel -> setup_arch -> setup_processor)
20 * -Platform Independent (must for any ARC700)
21 * -Needed for each CPU (hence not foldable into init_IRQ)

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56}
57
58static struct irq_chip onchip_intc = {
59 .name = "ARC In-core Intc",
60 .irq_mask = arc_mask_irq,
61 .irq_unmask = arc_unmask_irq,
62};
63
64static int arc_intc_domain_map(struct irq_domain *d, unsigned int irq,
65 irq_hw_number_t hw)
66{
67 if (irq == TIMER0_IRQ)
68 irq_set_chip_and_handler(irq, &onchip_intc, handle_percpu_irq);
69 else
70 irq_set_chip_and_handler(irq, &onchip_intc, handle_level_irq);
71
72 return 0;
73}
74
75static const struct irq_domain_ops arc_intc_domain_ops = {
76 .xlate = irq_domain_xlate_onecell,
77 .map = arc_intc_domain_map,
78};
79
80static struct irq_domain *root_domain;
81
62void __init init_onchip_IRQ(void)
63{
82void __init init_onchip_IRQ(void)
83{
64 int i;
84 struct device_node *intc = NULL;
65
85
66 for (i = 0; i < NR_IRQS; i++)
67 irq_set_chip_and_handler(i, &onchip_intc, handle_level_irq);
86 intc = of_find_compatible_node(NULL, NULL, "snps,arc700-intc");
87 if(!intc)
88 panic("DeviceTree Missing incore intc\n");
68
89
69#ifdef CONFIG_SMP
70 irq_set_chip_and_handler(TIMER0_IRQ, &onchip_intc, handle_percpu_irq);
71#endif
90 root_domain = irq_domain_add_legacy(intc, NR_IRQS, 0, 0,
91 &arc_intc_domain_ops, NULL);
92
93 if (!root_domain)
94 panic("root irq domain not avail\n");
95
96 /* with this we don't need to export root_domain */
97 irq_set_default_host(root_domain);
72}
73
74/*
75 * Late Interrupt system init called from start_kernel for Boot CPU only
76 *
77 * Since slab must already be initialized, platforms can start doing any
78 * needed request_irq( )s
79 */

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99
100/*
101 * Late Interrupt system init called from start_kernel for Boot CPU only
102 *
103 * Since slab must already be initialized, platforms can start doing any
104 * needed request_irq( )s
105 */

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