efi_loader: bootefi hello should use loadaddr

Command 'bootefi hello' currently uses CONFIG_SYS_LOAD_ADDR
as loading address.

qemu machines have by default 128 MiB RAM.
CONFIG_SYS_LOAD_ADDR for x86 is 0x20000000 (512 MiB).
This causes 'bootefi hello' to fail.

We should use the environment variable loadaddr if available.
It defaults to 0x1000000 (16 MiB) on qemu_x86.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

cmd/bootefi.c

@@ -299,7 +299,11 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	if (!strcmp(argv[1], "hello")) {
 		ulong size = __efi_hello_world_end - __efi_hello_world_begin;
 
-		addr = CONFIG_SYS_LOAD_ADDR;
+		saddr = env_get("loadaddr");
+		if (saddr)
+			addr = simple_strtoul(saddr, NULL, 16);
+		else
+			addr = CONFIG_SYS_LOAD_ADDR;
 		memcpy((char *)addr, __efi_hello_world_begin, size);
 	} else
 #endif