qemu: add support for memory above 4G

Change-Id: Ic83f55d01b29b43028e3b363749d64b927db5489
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-on: http://review.coreboot.org/3492
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/mainboard/emulation/qemu-i440fx/memory.c

@@ -21,9 +21,14 @@
 
 #define CMOS_ADDR_PORT 0x70
 #define CMOS_DATA_PORT 0x71
+
 #define HIGH_RAM_ADDR 0x35
 #define LOW_RAM_ADDR 0x34
 
+#define HIGH_HIGHRAM_ADDR 0x5d
+#define MID_HIGHRAM_ADDR 0x5c
+#define LOW_HIGHRAM_ADDR 0x5b
+
 static unsigned long qemu_get_memory_size(void)
 {
 	unsigned long tomk;