arch/mips/loongson64/reset.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
   5  * Author: Fuxin Zhang, zhangfx@lemote.com
   6  * Copyright (C) 2009 Lemote, Inc.
   7  * Author: Zhangjin Wu, wuzhangjin@gmail.com
   8  */
   9 #include <linux/init.h>
  10 #include <linux/pm.h>
  11
  12 #include <asm/idle.h>
  13 #include <asm/reboot.h>
  14
  15 #include <loongson.h>
  16 #include <boot_param.h>
  17
  18 static inline void loongson_reboot(void)
  19 {
  20         ((void (*)(void))ioremap(LOONGSON_BOOT_BASE, 4)) ();
  21 }
  22
  23 static void loongson_restart(char *command)
  24 {
  25
  26         void (*fw_restart)(void) = (void *)loongson_sysconf.restart_addr;
  27
  28         fw_restart();
  29         while (1) {
  30                 if (cpu_wait)
  31                         cpu_wait();
  32         }
  33 }
  34
  35 static void loongson_poweroff(void)
  36 {
  37         void (*fw_poweroff)(void) = (void *)loongson_sysconf.poweroff_addr;
  38
  39         fw_poweroff();
  40         while (1) {
  41                 if (cpu_wait)
  42                         cpu_wait();
  43         }
  44 }
  45
  46 static void loongson_halt(void)
  47 {
  48         pr_notice("\n\n** You can safely turn off the power now **\n\n");
  49         while (1) {
  50                 if (cpu_wait)
  51                         cpu_wait();
  52         }
  53 }
  54
  55 static int __init mips_reboot_setup(void)
  56 {
  57         _machine_restart = loongson_restart;
  58         _machine_halt = loongson_halt;
  59         pm_power_off = loongson_poweroff;
  60
  61         return 0;
  62 }
  63
  64 arch_initcall(mips_reboot_setup);