74 lines
1.4 KiB
C
74 lines
1.4 KiB
C
|
// 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>
|
||
|
|
|
||
|
|
static inline void loongson_reboot(void)
|
||
|
|
{
|
||
|
|
#ifndef CONFIG_CPU_JUMP_WORKAROUNDS
|
||
|
|
((void (*)(void))ioremap(LOONGSON_BOOT_BASE, 4)) ();
|
||
|
|
#else
|
||
|
|
void (*func)(void);
|
||
|
|
|
||
|
|
func = (void *)ioremap(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)
|
||
|
|
{
|
||
|
|
/* do preparation for reboot */
|
||
|
|
mach_prepare_reboot();
|
||
|
|
|
||
|
|
/* reboot via jumping to boot base address */
|
||
|
|
loongson_reboot();
|
||
|
|
}
|
||
|
|
|
||
|
|
static void loongson_poweroff(void)
|
||
|
|
{
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
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);
|