arch/mn10300/kernel/mn10300-watchdog-low.S

   1 ###############################################################################
   2 #
   3 # MN10300 Watchdog interrupt handler
   4 #
   5 # Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   6 # Written by David Howells (dhowells@redhat.com)
   7 #
   8 # This program is free software; you can redistribute it and/or
   9 # modify it under the terms of the GNU General Public Licence
  10 # as published by the Free Software Foundation; either version
  11 # 2 of the Licence, or (at your option) any later version.
  12 #
  13 ###############################################################################
  14 #include <linux/sys.h>
  15 #include <linux/linkage.h>
  16 #include <asm/intctl-regs.h>
  17 #include <asm/timer-regs.h>
  18 #include <asm/frame.inc>
  19 #include <linux/threads.h>
  20
  21         .text
  22
  23 ###############################################################################
  24 #
  25 # Watchdog handler entry point
  26 # - special non-maskable interrupt
  27 #
  28 ###############################################################################
  29         .globl  watchdog_handler
  30         .type   watchdog_handler,@function
  31 watchdog_handler:
  32         add     -4,sp
  33         SAVE_ALL
  34
  35         mov     0xffffffff,d0
  36         mov     d0,(REG_ORIG_D0,fp)
  37
  38         mov     fp,d0
  39         lsr     2,d1
  40         call    watchdog_interrupt[],0          # watchdog_interrupt(regs,irq)
  41
  42         jmp     ret_from_intr
  43
  44         .size   watchdog_handler,.-watchdog_handler
  45
  46 ###############################################################################
  47 #
  48 # Watchdog touch entry point
  49 # - kept to absolute minimum (unfortunately, it's prototyped in linux/nmi.h so
  50 #   we can't inline it)
  51 #
  52 ###############################################################################
  53         .globl  touch_nmi_watchdog
  54         .type   touch_nmi_watchdog,@function
  55 touch_nmi_watchdog:
  56         clr     d0
  57         clr     d1
  58         mov     watchdog_alert_counter, a0
  59         setlb
  60         mov     d0, (a0+)
  61         inc     d1
  62         cmp     NR_CPUS, d1
  63         lne
  64         ret     [],0
  65
  66         .size   touch_nmi_watchdog,.-touch_nmi_watchdog