From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/mips/loongson2ef/common/reset.c | 73 ++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 arch/mips/loongson2ef/common/reset.c (limited to 'arch/mips/loongson2ef/common/reset.c') diff --git a/arch/mips/loongson2ef/common/reset.c b/arch/mips/loongson2ef/common/reset.c new file mode 100644 index 000000000..e49c40646 --- /dev/null +++ b/arch/mips/loongson2ef/common/reset.c @@ -0,0 +1,73 @@ +// 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 +#include + +#include +#include + +#include + +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); -- cgit v1.2.3