2 * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
3 * Author: Fuxin Zhang, zhangfx@lemote.com
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
10 #include <linux/delay.h>
11 #include <linux/interrupt.h>
15 * the first level int-handler will jump here if it is a bonito irq
17 void bonito_irqdispatch(void)
22 /* workaround the IO dma problem: let cpu looping to allow DMA finish */
23 int_status = LOONGSON_INTISR;
24 while (int_status & (1 << 10)) {
26 int_status = LOONGSON_INTISR;
29 /* Get pending sources, masked by current enables */
30 int_status = LOONGSON_INTISR & LOONGSON_INTEN;
33 i = __ffs(int_status);
34 do_IRQ(LOONGSON_IRQ_BASE + i);
38 asmlinkage void plat_irq_dispatch(void)
42 pending = read_c0_cause() & read_c0_status() & ST0_IM;
44 /* machine-specific plat_irq_dispatch */
45 mach_irq_dispatch(pending);
48 void __init arch_init_irq(void)
51 * Clear all of the interrupts while we change the able around a bit.
52 * int-handler is not on bootstrap
54 clear_c0_status(ST0_IM | ST0_BEV);
56 /* setting irq trigger mode */
57 set_irq_trigger_mode();
60 LOONGSON_INTSTEER = 0;
63 * Mask out all interrupt by writing "1" to all bit position in
64 * the interrupt reset reg.
66 LOONGSON_INTENCLR = ~0;
68 /* machine specific irq init */