linux/arch/mn10300/kernel/mn10300-watchdog-low.S
Akira Takeuchi 368dd5acd1 MN10300: And Panasonic AM34 subarch and implement SMP
Implement the Panasonic MN10300 AM34 CPU subarch and implement SMP support for
MN10300.  Also implement support for the MN2WS0060 processor and the ASB2364
evaluation board which are AM34 based.

Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
2010-10-27 17:28:55 +01:00

66 lines
1.7 KiB
ArmAsm

###############################################################################
#
# MN10300 Watchdog interrupt handler
#
# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
# Written by David Howells (dhowells@redhat.com)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public Licence
# as published by the Free Software Foundation; either version
# 2 of the Licence, or (at your option) any later version.
#
###############################################################################
#include <linux/sys.h>
#include <linux/linkage.h>
#include <asm/intctl-regs.h>
#include <asm/timer-regs.h>
#include <asm/frame.inc>
#include <linux/threads.h>
.text
###############################################################################
#
# Watchdog handler entry point
# - special non-maskable interrupt
#
###############################################################################
.globl watchdog_handler
.type watchdog_handler,@function
watchdog_handler:
add -4,sp
SAVE_ALL
mov 0xffffffff,d0
mov d0,(REG_ORIG_D0,fp)
mov fp,d0
lsr 2,d1
call watchdog_interrupt[],0 # watchdog_interrupt(regs,irq)
jmp ret_from_intr
.size watchdog_handler,.-watchdog_handler
###############################################################################
#
# Watchdog touch entry point
# - kept to absolute minimum (unfortunately, it's prototyped in linux/nmi.h so
# we can't inline it)
#
###############################################################################
.globl touch_nmi_watchdog
.type touch_nmi_watchdog,@function
touch_nmi_watchdog:
clr d0
clr d1
mov watchdog_alert_counter, a0
setlb
mov d0, (a0+)
inc d1
cmp NR_CPUS, d1
lne
ret [],0
.size touch_nmi_watchdog,.-touch_nmi_watchdog