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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mn10300/kernel/mn10300-watchdog-low.S
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###############################################################################

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#

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# MN10300 Watchdog interrupt handler

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#

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# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.

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# Written by David Howells ([email protected])

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#

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# This program is free software; you can redistribute it and/or

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# modify it under the terms of the GNU General Public Licence

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# as published by the Free Software Foundation; either version

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# 2 of the Licence, or (at your option) any later version.

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#

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###############################################################################

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#include <linux/sys.h>

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#include <linux/linkage.h>

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#include <asm/intctl-regs.h>

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#include <asm/timer-regs.h>

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#include <asm/frame.inc>

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#include <linux/threads.h>

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	.text

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###############################################################################

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#

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# Watchdog handler entry point

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# - special non-maskable interrupt

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#

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###############################################################################

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	.globl	watchdog_handler

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	.type	watchdog_handler,@function

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watchdog_handler:

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	add	-4,sp

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	SAVE_ALL

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	mov	0xffffffff,d0

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	mov	d0,(REG_ORIG_D0,fp)

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	mov	fp,d0

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	lsr	2,d1

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	call	watchdog_interrupt[],0		# watchdog_interrupt(regs,irq)

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	jmp	ret_from_intr

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	.size	watchdog_handler,.-watchdog_handler

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###############################################################################

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#

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# Watchdog touch entry point

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# - kept to absolute minimum (unfortunately, it's prototyped in linux/nmi.h so

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#   we can't inline it)

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#

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###############################################################################

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	.globl	touch_nmi_watchdog

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	.type	touch_nmi_watchdog,@function

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touch_nmi_watchdog:

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	clr	d0

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	clr	d1

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	mov	watchdog_alert_counter, a0

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	setlb

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	mov	d0, (a0+)

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	inc	d1

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	cmp	NR_CPUS, d1

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	lne

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	ret	[],0

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	.size	touch_nmi_watchdog,.-touch_nmi_watchdog

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