40 lines
883 B
C
40 lines
883 B
C
/* tick14.c
|
|
*
|
|
* Copyright (C) 1996 David Redman (djhr@tadpole.co.uk)
|
|
*
|
|
* This file handles the Sparc specific level14 ticker
|
|
* This is really useful for profiling OBP uses it for keyboard
|
|
* aborts and other stuff.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
|
|
extern unsigned long lvl14_save[5];
|
|
static unsigned long *linux_lvl14 = NULL;
|
|
static unsigned long obp_lvl14[4];
|
|
|
|
/*
|
|
* Call with timer IRQ closed.
|
|
* First time we do it with disable_irq, later prom code uses spin_lock_irq().
|
|
*/
|
|
void install_linux_ticker(void)
|
|
{
|
|
|
|
if (!linux_lvl14)
|
|
return;
|
|
linux_lvl14[0] = lvl14_save[0];
|
|
linux_lvl14[1] = lvl14_save[1];
|
|
linux_lvl14[2] = lvl14_save[2];
|
|
linux_lvl14[3] = lvl14_save[3];
|
|
}
|
|
|
|
void install_obp_ticker(void)
|
|
{
|
|
|
|
if (!linux_lvl14)
|
|
return;
|
|
linux_lvl14[0] = obp_lvl14[0];
|
|
linux_lvl14[1] = obp_lvl14[1];
|
|
linux_lvl14[2] = obp_lvl14[2];
|
|
linux_lvl14[3] = obp_lvl14[3];
|
|
}
|