irq.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:2k
- /*
- * linux/arch/arm/mach-epxa10db/irq.c
- *
- * Copyright (C) 2001 Altera Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include <linux/init.h>
- #include <asm/hardware.h>
- #include <asm/irq.h>
- #include <asm/io.h>
- #include <asm/mach/irq.h>
- #include <asm/arch/platform.h>
- #include <asm/arch/int_ctrl00.h>
- static void mask_irq(unsigned int irq)
- {
- __raw_writel(1 << irq, INT_MC(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
- }
- static void unmask_irq(unsigned int irq)
- {
- __raw_writel(1 << irq, INT_MS(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
- }
-
- void __init epxa10db_init_irq(void)
- {
- unsigned int i;
-
- /*
- * This bit sets up the interrupt controller using
- * the 6 PLD interrupts mode (the default) each
- * irqs is assigned a priority which is the same
- * as its interrupt number. This scheme is used because
- * its easy, but you may want to change it depending
- * on the contents of your PLD
- */
- __raw_writel(3,INT_MODE(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
- for (i = 0; i < NR_IRQS; i++){
- __raw_writel(i+1, INT_PRIORITY_P0(IO_ADDRESS(EXC_INT_CTRL00_BASE)) + (4*i));
- }
- for (i = 0; i < NR_IRQS; i++) {
-
- irq_desc[i].valid = 1;
- irq_desc[i].probe_ok = 1;
- irq_desc[i].mask_ack = mask_irq;
- irq_desc[i].mask = mask_irq;
- irq_desc[i].unmask = unmask_irq;
- }
- /* Disable all interrupt */
- __raw_writel(-1,INT_MC(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
- }