i.MX2 family: Add basic mach support (sources)

This patch adds basic mach support for the mx2 processor family, based
on the original freescale code and adapted to mainline kernel coding
style.

Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>

arch/arm/mach-mx2/generic.c

@@ -0,0 +1,74 @@
+/*
+ * generic.c
+ *
+ * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
+ *
+ * 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.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <asm/hardware.h>
+#include <asm/pgtable.h>
+#include <asm/mach/map.h>
+
+/* MX27 memory map definition */
+static struct map_desc mxc_io_desc[] __initdata = {
+	/*
+	 * this fixed mapping covers:
+	 * - AIPI1
+	 * - AIPI2
+	 * - AITC
+	 * - ROM Patch
+	 * - and some reserved space
+	 */
+	{
+		.virtual = AIPI_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(AIPI_BASE_ADDR),
+		.length = AIPI_SIZE,
+		.type = MT_DEVICE
+	},
+	/*
+	 * this fixed mapping covers:
+	 * - CSI
+	 * - ATA
+	 */
+	{
+		.virtual = SAHB1_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(SAHB1_BASE_ADDR),
+		.length = SAHB1_SIZE,
+		.type = MT_DEVICE
+	},
+	/*
+	 * this fixed mapping covers:
+	 * - EMI
+	 */
+	{
+		.virtual = X_MEMC_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(X_MEMC_BASE_ADDR),
+		.length = X_MEMC_SIZE,
+		.type = MT_DEVICE
+	}
+};
+
+/*
+ * Initialize the memory map. It is called during the
+ * system startup to create static physical to virtual
+ * memory map for the IO modules.
+ */
+void __init mxc_map_io(void)
+{
+	iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
+}