arch/sparc/kernel/reboot.c

Source file repositories/reference/linux-study-clean/arch/sparc/kernel/reboot.c

File Facts

System
Linux kernel
Corpus path
arch/sparc/kernel/reboot.c
Extension
.c
Size
1077 bytes
Lines
56
Domain
Architecture Layer
Bucket
arch/sparc
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/* reboot.c: reboot/shutdown/halt/poweroff handling
 *
 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
 */
#include <linux/kernel.h>
#include <linux/reboot.h>
#include <linux/export.h>
#include <linux/pm.h>
#include <linux/of.h>

#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/setup.h>

/* sysctl - toggle power-off restriction for serial console
 * systems in machine_power_off()
 */
int scons_pwroff = 1;

/* This isn't actually used, it exists merely to satisfy the
 * reference in kernel/sys.c
 */
void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL(pm_power_off);

void machine_power_off(void)
{
	if (!of_node_is_type(of_console_device, "serial") || scons_pwroff)
		prom_halt_power_off();

	prom_halt();
}

void machine_halt(void)
{
	prom_halt();
	panic("Halt failed!");
}

void machine_restart(char *cmd)
{
	char *p;

	p = strchr(reboot_command, '\n');
	if (p)
		*p = 0;
	if (cmd)
		prom_reboot(cmd);
	if (*reboot_command)
		prom_reboot(reboot_command);
	prom_reboot("");
	panic("Reboot failed!");
}

Annotation

Implementation Notes