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Diffstat (limited to 'arch/mips/loongson32/common/reset.c')
-rw-r--r--arch/mips/loongson32/common/reset.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/mips/loongson32/common/reset.c b/arch/mips/loongson32/common/reset.c
new file mode 100644
index 000000000..c41e4ca56
--- /dev/null
+++ b/arch/mips/loongson32/common/reset.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
+ *
+ * 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.
+ */
+
+#include <linux/io.h>
+#include <linux/pm.h>
+#include <asm/idle.h>
+#include <asm/reboot.h>
+
+#include <loongson1.h>
+
+static void __iomem *wdt_base;
+
+static void ls1x_halt(void)
+{
+ while (1) {
+ if (cpu_wait)
+ cpu_wait();
+ }
+}
+
+static void ls1x_restart(char *command)
+{
+ __raw_writel(0x1, wdt_base + WDT_EN);
+ __raw_writel(0x1, wdt_base + WDT_TIMER);
+ __raw_writel(0x1, wdt_base + WDT_SET);
+
+ ls1x_halt();
+}
+
+static void ls1x_power_off(void)
+{
+ ls1x_halt();
+}
+
+static int __init ls1x_reboot_setup(void)
+{
+ wdt_base = ioremap_nocache(LS1X_WDT_BASE, 0x0f);
+ if (!wdt_base)
+ panic("Failed to remap watchdog registers");
+
+ _machine_restart = ls1x_restart;
+ _machine_halt = ls1x_halt;
+ pm_power_off = ls1x_power_off;
+
+ return 0;
+}
+
+arch_initcall(ls1x_reboot_setup);