u-boot/arch/powerpc/lib/interrupts.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

104 lines
2 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 <asm/processor.h>
#include <watchdog.h>
#ifdef CONFIG_LED_STATUS
#include <status_led.h>
#endif
#ifdef CONFIG_SHOW_ACTIVITY
void board_show_activity (ulong) __attribute__((weak, alias("__board_show_activity")));
void __board_show_activity (ulong dummy)
{
return;
}
#endif /* CONFIG_SHOW_ACTIVITY */
#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));
}
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);
}
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 */
#ifdef CONFIG_SHOW_ACTIVITY
board_show_activity (timestamp);
#endif /* CONFIG_SHOW_ACTIVITY */
}
ulong get_timer (ulong base)
{
return (timestamp - base);
}