1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/*
|
|
* 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 <linux/ioport.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/list.h>
|
|
#include <asm/io.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/mach/irq.h>
|
|
#include <asm/arch/platform.h>
|
|
#include <asm/arch/int_ctrl00.h>
|
|
|
|
|
|
static void epxa_mask_irq(unsigned int irq)
|
|
{
|
|
writel(1 << irq, INT_MC(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
|
|
}
|
|
|
|
static void epxa_unmask_irq(unsigned int irq)
|
|
{
|
|
writel(1 << irq, INT_MS(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
|
|
}
|
|
|
|
|
|
static struct irqchip epxa_irq_chip = {
|
|
.ack = epxa_mask_irq,
|
|
.mask = epxa_mask_irq,
|
|
.unmask = epxa_unmask_irq,
|
|
};
|
|
|
|
static struct resource irq_resource = {
|
|
.name = "irq_handler",
|
|
.start = IO_ADDRESS(EXC_INT_CTRL00_BASE),
|
|
.end = IO_ADDRESS(INT_PRIORITY_FC(EXC_INT_CTRL00_BASE))+4,
|
|
};
|
|
|
|
void __init epxa10db_init_irq(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
request_resource(&iomem_resource, &irq_resource);
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
|
|
writel(3,INT_MODE(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
|
|
for (i = 0; i < NR_IRQS; i++){
|
|
writel(i+1, INT_PRIORITY_P0(IO_ADDRESS(EXC_INT_CTRL00_BASE)) + (4*i));
|
|
set_irq_chip(i,&epxa_irq_chip);
|
|
set_irq_handler(i,do_level_IRQ);
|
|
set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
|
|
}
|
|
|
|
/* Disable all interrupts */
|
|
writel(-1,INT_MC(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
|
|
|
|
}
|