--- a/arch/mips/lantiq/setup.c
+++ b/arch/mips/lantiq/setup.c
@@ -40,6 +40,12 @@ void __init plat_mem_setup(void)
 			e += 8;
 			if (strict_strtoul(e, 0, &memsize))
 				pr_warn("bad memsize specified\n");
+		} else if (!strcmp(e, "memsize")) {
+			envp++;
+			e = (char *)KSEG1ADDR(*envp);
+			if (strict_strtoul(e, 0, &memsize))
+				pr_warn("bad memsize specified\n");
+			memsize /= 1024 * 1024;
 		}
 		if (!strncmp(e, "BRN-BOOT", 8)){
 			pr_info("Found BRN-BOOT instead of u-boot\n");
