95 lines
1.8 KiB
C
95 lines
1.8 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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*
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* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
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* Author: Fuxin Zhang, zhangfx@lemote.com
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* Copyright (C) 2009 Lemote, Inc.
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* Author: Zhangjin Wu, wuzhangjin@gmail.com
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*/
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#include <linux/init.h>
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#include <linux/pm.h>
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#include <asm/idle.h>
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#include <asm/reboot.h>
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#include <loongson.h>
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#include <boot_param.h>
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static inline void loongson_reboot(void)
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{
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#ifndef CONFIG_CPU_JUMP_WORKAROUNDS
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((void (*)(void))ioremap_nocache(LOONGSON_BOOT_BASE, 4)) ();
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#else
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void (*func)(void);
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func = (void *)ioremap_nocache(LOONGSON_BOOT_BASE, 4);
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__asm__ __volatile__(
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" .set noat \n"
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" jr %[func] \n"
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" .set at \n"
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: /* No outputs */
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: [func] "r" (func));
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#endif
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}
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static void loongson_restart(char *command)
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{
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#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE
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/* do preparation for reboot */
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mach_prepare_reboot();
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/* reboot via jumping to boot base address */
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loongson_reboot();
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#else
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void (*fw_restart)(void) = (void *)loongson_sysconf.restart_addr;
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fw_restart();
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while (1) {
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if (cpu_wait)
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cpu_wait();
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}
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#endif
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}
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static void loongson_poweroff(void)
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{
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#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE
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mach_prepare_shutdown();
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/*
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* It needs a wait loop here, but mips/kernel/reset.c already calls
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* a generic delay loop, machine_hang(), so simply return.
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*/
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return;
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#else
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void (*fw_poweroff)(void) = (void *)loongson_sysconf.poweroff_addr;
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fw_poweroff();
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while (1) {
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if (cpu_wait)
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cpu_wait();
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}
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#endif
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}
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static void loongson_halt(void)
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{
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pr_notice("\n\n** You can safely turn off the power now **\n\n");
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while (1) {
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if (cpu_wait)
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cpu_wait();
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}
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}
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static int __init mips_reboot_setup(void)
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{
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_machine_restart = loongson_restart;
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_machine_halt = loongson_halt;
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pm_power_off = loongson_poweroff;
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return 0;
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}
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arch_initcall(mips_reboot_setup);
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