1 files changed, 90 insertions, 0 deletions

diff --git a/include/asm-arm/arch-s3c2410/system.h b/include/asm-arm/arch-s3c2410/system.h
new file mode 100644
index 00000000000..9b0d85024cb
--- /dev/null
+++ b/include/asm-arm/arch-s3c2410/system.h
@@ -0,0 +1,90 @@
+/* linux/include/asm-arm/arch-s3c2410/system.h
+ *
+ * (c) 2003 Simtec Electronics
+ *  Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 - System function defines and includes
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Changelog:
+ *  12-May-2003 BJD  Created file
+ *  14-May-2003 BJD  Removed idle to aid debugging
+ *  12-Jun-2003 BJD  Added reset via watchdog
+ *  04-Sep-2003 BJD  Moved to v2.6
+ *  28-Oct-2004 BJD  Added over-ride for idle, and fixed reset panic()
+ */
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+
+#include <asm/arch/map.h>
+#include <asm/arch/idle.h>
+
+#include <asm/arch/regs-watchdog.h>
+#include <asm/arch/regs-clock.h>
+
+void (*s3c24xx_idle)(void);
+
+void s3c24xx_default_idle(void)
+{
+        void __iomem *reg = S3C2410_CLKCON;
+        unsigned long tmp;
+        int i;
+
+        /* idle the system by using the idle mode which will wait for an
+         * interrupt to happen before restarting the system.
+         */
+
+        /* Warning: going into idle state upsets jtag scanning */
+
+        __raw_writel(__raw_readl(reg) | (1<<2), reg);
+
+        /* the samsung port seems to do a loop and then unset idle.. */
+        for (i = 0; i < 50; i++) {
+                tmp += __raw_readl(reg); /* ensure loop not optimised out */
+        }
+
+        /* this bit is not cleared on re-start... */
+
+        __raw_writel(__raw_readl(reg) & ~(1<<2), reg);
+}
+
+static void arch_idle(void)
+{
+        if (s3c24xx_idle != NULL)
+                (s3c24xx_idle)();
+        else
+                s3c24xx_default_idle();
+}
+
+
+static void
+arch_reset(char mode)
+{
+        if (mode == 's') {
+                cpu_reset(0);
+        }
+
+        printk("arch_reset: attempting watchdog reset\n");
+
+        __raw_writel(0, S3C2410_WTCON);   /* disable watchdog, to be safe  */
+
+        /* put initial values into count and data */
+        __raw_writel(0x100, S3C2410_WTCNT);
+        __raw_writel(0x100, S3C2410_WTDAT);
+
+        /* set the watchdog to go and reset... */
+        __raw_writel(S3C2410_WTCON_ENABLE|S3C2410_WTCON_DIV16|S3C2410_WTCON_RSTEN |
+                     S3C2410_WTCON_PRESCALE(0x80), S3C2410_WTCON);
+
+        /* wait for reset to assert... */
+        mdelay(5000);
+
+        printk(KERN_ERR "Watchdog reset failed to assert reset\n");
+
+        /* we'll take a jump through zero as a poor second */
+        cpu_reset(0);
+}