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-integrator/irq.c
- *
- * Copyright (C) 1999 ARM Limited
- *
- * 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>
- /*
- * All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
- * is the (PA >> 12).
- *
- * Setup a VA for the Integrator interrupt controller (for header #0,
- * just for now).
- */
- #define VA_IC_BASE IO_ADDRESS(INTEGRATOR_IC_BASE)
- #define VA_CMIC_BASE IO_ADDRESS(INTEGRATOR_HDR_BASE) + INTEGRATOR_HDR_IC_OFFSET
- #define ALLPCI ( (1 << IRQ_PCIINT0) | (1 << IRQ_PCIINT1) | (1 << IRQ_PCIINT2) | (1 << IRQ_PCIINT3) )
- static void sc_mask_irq(unsigned int irq)
- {
- __raw_writel(1 << irq, VA_IC_BASE + IRQ_ENABLE_CLEAR);
- }
- static void sc_unmask_irq(unsigned int irq)
- {
- __raw_writel(1 << irq, VA_IC_BASE + IRQ_ENABLE_SET);
- }
-
- void __init integrator_init_irq(void)
- {
- unsigned int i;
- for (i = 0; i < NR_IRQS; i++) {
- if (((1 << i) && INTEGRATOR_SC_VALID_INT) != 0) {
- irq_desc[i].valid = 1;
- irq_desc[i].probe_ok = 1;
- irq_desc[i].mask_ack = sc_mask_irq;
- irq_desc[i].mask = sc_mask_irq;
- irq_desc[i].unmask = sc_unmask_irq;
- }
- }
- /* Disable all interrupts initially. */
- /* Do the core module ones */
- __raw_writel(-1, VA_CMIC_BASE + IRQ_ENABLE_CLEAR);
- /* do the header card stuff next */
- __raw_writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
- __raw_writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
- }