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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/loongarch/kernel/reset.c
26442 views
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// SPDX-License-Identifier: GPL-2.0

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/*

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 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited

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 */

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#include <linux/kernel.h>

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#include <linux/acpi.h>

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#include <linux/efi.h>

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#include <linux/export.h>

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#include <linux/pm.h>

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#include <linux/types.h>

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#include <linux/reboot.h>

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#include <linux/delay.h>

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#include <linux/console.h>

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#include <acpi/reboot.h>

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#include <asm/idle.h>

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#include <asm/loongarch.h>

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#include <asm/loongson.h>

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void (*pm_power_off)(void);

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EXPORT_SYMBOL(pm_power_off);

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void machine_halt(void)

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{

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#ifdef CONFIG_SMP

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	preempt_disable();

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	smp_send_stop();

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#endif

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	local_irq_disable();

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	clear_csr_ecfg(ECFG0_IM);

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	pr_notice("\n\n** You can safely turn off the power now **\n\n");

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	console_flush_on_panic(CONSOLE_FLUSH_PENDING);

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	while (true) {

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		__asm__ __volatile__("idle 0" : : : "memory");

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	}

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}

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void machine_power_off(void)

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{

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#ifdef CONFIG_SMP

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	preempt_disable();

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	smp_send_stop();

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#endif

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#ifdef CONFIG_PM

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	if (!acpi_disabled)

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		enable_pci_wakeup();

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#endif

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	do_kernel_power_off();

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#ifdef CONFIG_EFI

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	efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL);

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#endif

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	while (true) {

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		__asm__ __volatile__("idle 0" : : : "memory");

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	}

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}

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void machine_restart(char *command)

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{

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#ifdef CONFIG_SMP

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	preempt_disable();

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	smp_send_stop();

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#endif

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	do_kernel_restart(command);

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#ifdef CONFIG_EFI

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	if (efi_capsule_pending(NULL))

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		efi_reboot(REBOOT_WARM, NULL);

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	else

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		efi_reboot(REBOOT_COLD, NULL);

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#endif

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	if (!acpi_disabled)

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		acpi_reboot();

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	while (true) {

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		__asm__ __volatile__("idle 0" : : : "memory");

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	}

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}

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