arch/nds32/cpu/n1213/ag101/watchdog.S

   1 /*
   2  * Copyright (C) 2011 Andes Technology Corporation
   3  * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <asm/arch-ag101/ag101.h>
   9 #include <linux/linkage.h>
  10
  11 .text
  12
  13 #ifndef CONFIG_SKIP_TRUNOFF_WATCHDOG
  14 ENTRY(turnoff_watchdog)
  15
  16 #define WD_CR           0xC
  17 #define WD_ENABLE       0x1
  18
  19         ! Turn off the watchdog, according to Faraday FTWDT010 spec
  20         li      $p0, (CONFIG_FTWDT010_BASE+WD_CR)       ! Get the addr of WD CR
  21         lwi     $p1, [$p0]                              ! Get the config of WD
  22         andi    $p1, $p1, 0x1f                          ! Wipe out useless bits
  23         li      $r0, ~WD_ENABLE
  24         and     $p1, $p1, $r0                           ! Set WD disable
  25         sw      $p1, [$p0]                              ! Write back to WD CR
  26
  27         ! Disable Interrupts by clear GIE in $PSW reg
  28         setgie.d
  29
  30         ret
  31
  32 ENDPROC(turnoff_watchdog)
  33 #endif