sun3ints.c
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/*
* linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <asm/segment.h>
#include <asm/intersil.h>
#include <asm/oplib.h>
#include <asm/sun3ints.h>
#include <asm/irq_regs.h>
#include <linux/seq_file.h>
extern void sun3_leds (unsigned char);
void sun3_disable_interrupts(void)
{
sun3_disable_irq(0);
}
void sun3_enable_interrupts(void)
{
sun3_enable_irq(0);
}
static int led_pattern[8] = {
~(0x80), ~(0x01),
~(0x40), ~(0x02),
~(0x20), ~(0x04),
~(0x10), ~(0x08)
};
volatile unsigned char* sun3_intreg;
void sun3_enable_irq(unsigned int irq)
{
*sun3_intreg |= (1 << irq);
}
void sun3_disable_irq(unsigned int irq)
{
*sun3_intreg &= ~(1 << irq);
}
static irqreturn_t sun3_int7(int irq, void *dev_id)
{
unsigned int cnt;
cnt = kstat_irqs_cpu(irq, 0);
if (!(cnt % 2000))
sun3_leds(led_pattern[cnt % 16000 / 2000]);
return IRQ_HANDLED;
}
static irqreturn_t sun3_int5(int irq, void *dev_id)
{
unsigned int cnt;
#ifdef CONFIG_SUN3
intersil_clear();
#endif
sun3_disable_irq(5);
sun3_enable_irq(5);
#ifdef CONFIG_SUN3
intersil_clear();
#endif
xtime_update(1);
update_process_times(user_mode(get_irq_regs()));
cnt = kstat_irqs_cpu(irq, 0);
if (!(cnt % 20))
sun3_leds(led_pattern[cnt % 160 / 20]);
return IRQ_HANDLED;
}
static irqreturn_t sun3_vec255(int irq, void *dev_id)
{
return IRQ_HANDLED;
}
void __init sun3_init_IRQ(void)
{
*sun3_intreg = 1;
m68k_setup_user_interrupt(VEC_USER, 128);
if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL))
pr_err("Couldn't register %s interrupt\n", "int5");
if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL))
pr_err("Couldn't register %s interrupt\n", "int7");
if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
pr_err("Couldn't register %s interrupt\n", "vec255");
}