11da177e4SLinus Torvalds /*
21da177e4SLinus Torvalds * IRQ vector handles
31da177e4SLinus Torvalds *
41da177e4SLinus Torvalds * This file is subject to the terms and conditions of the GNU General Public
51da177e4SLinus Torvalds * License. See the file "COPYING" in the main directory of this archive
61da177e4SLinus Torvalds * for more details.
71da177e4SLinus Torvalds *
81da177e4SLinus Torvalds * Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle
91da177e4SLinus Torvalds */
101da177e4SLinus Torvalds #include <linux/kernel.h>
111da177e4SLinus Torvalds #include <linux/init.h>
121da177e4SLinus Torvalds #include <linux/irq.h>
13c4ed38a0SRalf Baechle #include <linux/interrupt.h>
14c4ed38a0SRalf Baechle #include <linux/pci.h>
151da177e4SLinus Torvalds
161da177e4SLinus Torvalds #include <asm/i8259.h>
171da177e4SLinus Torvalds #include <asm/irq_cpu.h>
18d5ab1a69SYoichi Yuasa #include <asm/irq_gt641xx.h>
191da177e4SLinus Torvalds #include <asm/gt64120.h>
201da177e4SLinus Torvalds
21d5ab1a69SYoichi Yuasa #include <irq.h>
221da177e4SLinus Torvalds
plat_irq_dispatch(void)23937a8015SRalf Baechle asmlinkage void plat_irq_dispatch(void)
24c4ed38a0SRalf Baechle {
25d5ab1a69SYoichi Yuasa unsigned pending = read_c0_status() & read_c0_cause() & ST0_IM;
26d5ab1a69SYoichi Yuasa int irq;
27c4ed38a0SRalf Baechle
28d5ab1a69SYoichi Yuasa if (pending & CAUSEF_IP2)
29d5ab1a69SYoichi Yuasa gt641xx_irq_dispatch();
30d5ab1a69SYoichi Yuasa else if (pending & CAUSEF_IP6) {
31d5ab1a69SYoichi Yuasa irq = i8259_irq();
32d5ab1a69SYoichi Yuasa if (irq < 0)
33d5ab1a69SYoichi Yuasa spurious_interrupt();
34d5ab1a69SYoichi Yuasa else
35d5ab1a69SYoichi Yuasa do_IRQ(irq);
36d5ab1a69SYoichi Yuasa } else if (pending & CAUSEF_IP3)
37d5ab1a69SYoichi Yuasa do_IRQ(MIPS_CPU_IRQ_BASE + 3);
38d5ab1a69SYoichi Yuasa else if (pending & CAUSEF_IP4)
39d5ab1a69SYoichi Yuasa do_IRQ(MIPS_CPU_IRQ_BASE + 4);
40d5ab1a69SYoichi Yuasa else if (pending & CAUSEF_IP5)
41d5ab1a69SYoichi Yuasa do_IRQ(MIPS_CPU_IRQ_BASE + 5);
42d5ab1a69SYoichi Yuasa else if (pending & CAUSEF_IP7)
43d5ab1a69SYoichi Yuasa do_IRQ(MIPS_CPU_IRQ_BASE + 7);
44d5ab1a69SYoichi Yuasa else
45d5ab1a69SYoichi Yuasa spurious_interrupt();
461da177e4SLinus Torvalds }
471da177e4SLinus Torvalds
arch_init_irq(void)481da177e4SLinus Torvalds void __init arch_init_irq(void)
491da177e4SLinus Torvalds {
50d5ab1a69SYoichi Yuasa mips_cpu_irq_init();
51d5ab1a69SYoichi Yuasa gt641xx_irq_init();
52d5ab1a69SYoichi Yuasa init_i8259_irqs();
53c4ed38a0SRalf Baechle
54*ac8fd122Safzal mohammed if (request_irq(GT641XX_CASCADE_IRQ, no_action, IRQF_NO_THREAD,
55*ac8fd122Safzal mohammed "cascade", NULL)) {
56*ac8fd122Safzal mohammed pr_err("Failed to request irq %d (cascade)\n",
57*ac8fd122Safzal mohammed GT641XX_CASCADE_IRQ);
58*ac8fd122Safzal mohammed }
59*ac8fd122Safzal mohammed if (request_irq(I8259_CASCADE_IRQ, no_action, IRQF_NO_THREAD,
60*ac8fd122Safzal mohammed "cascade", NULL)) {
61*ac8fd122Safzal mohammed pr_err("Failed to request irq %d (cascade)\n",
62*ac8fd122Safzal mohammed I8259_CASCADE_IRQ);
63*ac8fd122Safzal mohammed }
641da177e4SLinus Torvalds }
65