96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2000-2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* (C) Copyright 2003
|
|
* Gleb Natapov <gnatapov@mrv.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <irq_func.h>
|
|
#include <asm/processor.h>
|
|
#include <watchdog.h>
|
|
#ifdef CONFIG_LED_STATUS
|
|
#include <status_led.h>
|
|
#endif
|
|
|
|
#ifndef CONFIG_MPC83XX_TIMER
|
|
#ifndef CONFIG_SYS_WATCHDOG_FREQ
|
|
#define CONFIG_SYS_WATCHDOG_FREQ (CONFIG_SYS_HZ / 2)
|
|
#endif
|
|
|
|
static unsigned decrementer_count; /* count value for 1e6/HZ microseconds */
|
|
|
|
static __inline__ unsigned long get_dec (void)
|
|
{
|
|
unsigned long val;
|
|
|
|
asm volatile ("mfdec %0":"=r" (val):);
|
|
|
|
return val;
|
|
}
|
|
|
|
|
|
static __inline__ void set_dec (unsigned long val)
|
|
{
|
|
if (val)
|
|
asm volatile ("mtdec %0"::"r" (val));
|
|
}
|
|
#endif /* !CONFIG_MPC83XX_TIMER */
|
|
|
|
void enable_interrupts(void)
|
|
{
|
|
set_msr (get_msr () | MSR_EE);
|
|
}
|
|
|
|
/* returns flag if MSR_EE was set before */
|
|
int disable_interrupts(void)
|
|
{
|
|
ulong msr = get_msr ();
|
|
|
|
set_msr (msr & ~MSR_EE);
|
|
return ((msr & MSR_EE) != 0);
|
|
}
|
|
|
|
#ifndef CONFIG_MPC83XX_TIMER
|
|
int interrupt_init(void)
|
|
{
|
|
/* call cpu specific function from $(CPU)/interrupts.c */
|
|
interrupt_init_cpu (&decrementer_count);
|
|
|
|
set_dec (decrementer_count);
|
|
|
|
set_msr (get_msr () | MSR_EE);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static volatile ulong timestamp = 0;
|
|
|
|
void timer_interrupt(struct pt_regs *regs)
|
|
{
|
|
/* call cpu specific function from $(CPU)/interrupts.c */
|
|
timer_interrupt_cpu (regs);
|
|
|
|
/* Restore Decrementer Count */
|
|
set_dec (decrementer_count);
|
|
|
|
timestamp++;
|
|
|
|
#if defined(CONFIG_WATCHDOG) || defined (CONFIG_HW_WATCHDOG)
|
|
if ((timestamp % (CONFIG_SYS_WATCHDOG_FREQ)) == 0)
|
|
WATCHDOG_RESET ();
|
|
#endif /* CONFIG_WATCHDOG || CONFIG_HW_WATCHDOG */
|
|
|
|
#ifdef CONFIG_LED_STATUS
|
|
status_led_tick(timestamp);
|
|
#endif /* CONFIG_LED_STATUS */
|
|
}
|
|
|
|
ulong get_timer (ulong base)
|
|
{
|
|
return (timestamp - base);
|
|
}
|
|
#endif /* !CONFIG_MPC83XX_TIMER */
|