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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/mips/loongson64/common/reset.c
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/mips/loongson64/common/reset.c')
-rw-r--r--kernel/arch/mips/loongson64/common/reset.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/kernel/arch/mips/loongson64/common/reset.c b/kernel/arch/mips/loongson64/common/reset.c
new file mode 100644
index 000000000..a60715e11
--- /dev/null
+++ b/kernel/arch/mips/loongson64/common/reset.c
@@ -0,0 +1,92 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * 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();
+ unreachable();
+#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);