irq.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:2k
- /*
- * linux/arch/arm/mach-mx1ads/irq.c
- *
- * Copyright (C) 1999 ARM Limited
- * Copyright (C) 2002 Shane Nay (shane@minirl.com)
- *
- * 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>
- /*
- *
- * We simply use the ENABLE DISABLE registers inside of the MX1
- * to turn on/off specific interrupts. FIXME- We should
- * also add support for the accelerated interrupt controller
- * by putting offets to irq jump code in the appropriate
- * places.
- *
- */
- #define INTENNUM_OFF 0x8
- #define INTDISNUM_OFF 0xC
- #define VA_AITC_BASE IO_ADDRESS(MX1ADS_AITC_BASE)
- #define MX1ADS_AITC_INTDISNUM (VA_AITC_BASE + INTDISNUM_OFF)
- #define MX1ADS_AITC_INTENNUM (VA_AITC_BASE + INTENNUM_OFF)
- static void
- mx1ads_mask_irq(unsigned int irq)
- {
- __raw_writel(irq, MX1ADS_AITC_INTDISNUM);
- }
- static void
- mx1ads_unmask_irq(unsigned int irq)
- {
- __raw_writel(irq, MX1ADS_AITC_INTENNUM);
- }
- void __init
- mx1ads_init_irq(void)
- {
- unsigned int i;
- for (i = 0; i < NR_IRQS; i++) {
- irq_desc[i].valid = 1;
- irq_desc[i].probe_ok = 1;
- irq_desc[i].mask_ack = mx1ads_mask_irq;
- irq_desc[i].mask = mx1ads_mask_irq;
- irq_desc[i].unmask = mx1ads_unmask_irq;
- }
- /* Disable all interrupts initially. */
- /* In MX1 this is done in the bootloader. */
- }