[ARM] 3279/1: OMAP: 1/3 Fix low-level io init

Patch from Tony Lindgren

This patch adds the missing cache flushes to common low-level
init that are needed to access the IO region. These flushes
are normally done at the end of devicemaps_init(), but we
need to detect the OMAP core type early.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/plat-omap/sram.c

@@ -17,6 +17,7 @@
 #include <linux/init.h>
 
 #include <asm/mach/map.h>
+#include <asm/tlb.h>
 #include <asm/io.h>
 #include <asm/cacheflush.h>
 
@@ -95,6 +96,14 @@ void __init omap_map_sram(void)
 	       omap_sram_io_desc[0].pfn, omap_sram_io_desc[0].virtual,
 	       omap_sram_io_desc[0].length);
 
+	/*
+	 * Normally devicemaps_init() would flush caches and tlb after
+	 * mdesc->map_io(), but since we're called from map_io(), we
+	 * must do it here.
+	 */
+	local_flush_tlb_all();
+	flush_cache_all();
+
 	/*
 	 * Looks like we need to preserve some bootloader code at the
 	 * beginning of SRAM for jumping to flash for reboot to work...