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 = BONITO_INTISR;
24 if (int_status & (1 << 10)) {
25 while (int_status & (1 << 10)) {
27 int_status = BONITO_INTISR;
31 /* Get pending sources, masked by current enables */
32 int_status = BONITO_INTISR & BONITO_INTEN;
34 if (int_status != 0) {
35 i = __ffs(int_status);
36 int_status &= ~(1 << i);
37 do_IRQ(BONITO_IRQ_BASE + i);
41 asmlinkage void plat_irq_dispatch(void)
45 pending = read_c0_cause() & read_c0_status() & ST0_IM;
47 /* machine-specific plat_irq_dispatch */
48 mach_irq_dispatch(pending);
51 void __init arch_init_irq(void)
54 * Clear all of the interrupts while we change the able around a bit.
55 * int-handler is not on bootstrap
57 clear_c0_status(ST0_IM | ST0_BEV);
59 /* setting irq trigger mode */
60 set_irq_trigger_mode();
66 * Mask out all interrupt by writing "1" to all bit position in
67 * the interrupt reset reg.
71 /* machine specific irq init */