[ARM] 5473/1: U300 core machine support

This adds core support for the ST-Ericsson U300 series
platforms: U300, U330, U335 and U365. Supports memory
mappings, interrupt controller, system timer (clocksource
and clockevents), and binds to the existing drivers for
the PrimeCells used in this design: PL190 (VIC), PL180
(MMC/SD host) and PL011 (UART). This is intented to serve
as starting point for our mainling work, more patches to
follow.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-u300/include/mach/system.h

@@ -0,0 +1,42 @@
+/*
+ *
+ * arch/arm/mach-u300/include/mach/system.h
+ *
+ *
+ * Copyright (C) 2007-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * System shutdown and reset functions.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <mach/hardware.h>
+#include <asm/io.h>
+#include <asm/hardware/vic.h>
+#include <asm/irq.h>
+
+/* Forward declare this function from the watchdog */
+void coh901327_watchdog_reset(void);
+
+static inline void arch_idle(void)
+{
+	cpu_do_idle();
+}
+
+static void arch_reset(char mode, const char *cmd)
+{
+	switch (mode) {
+	case 's':
+	case 'h':
+		printk(KERN_CRIT "RESET: shutting down/rebooting system\n");
+		/* Disable interrupts */
+		local_irq_disable();
+#ifdef CONFIG_COH901327_WATCHDOG
+		coh901327_watchdog_reset();
+#endif
+		break;
+	default:
+		/* Do nothing */
+		break;
+	}
+	/* Wait for system do die/reset. */
+	while (1);
+}