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