Add (Broken) payload launching

source/meme/external_utils.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#define RELOC_META_OFF      0x7C
+#define PATCHED_RELOC_SZ    0x94
+#define PATCHED_RELOC_STACK 0x40007000
+#define PATCHED_RELOC_ENTRY 0x40010000
+#define EXT_PAYLOAD_ADDR    0xC03C0000
+#define RCM_PAYLOAD_ADDR    (EXT_PAYLOAD_ADDR + ALIGN(PATCHED_RELOC_SZ, 0x10))
+#define COREBOOT_ADDR       (0xD0000000 - 0x100000)
+#define CBFS_DRAM_EN_ADDR   0x4003e000
+#define  CBFS_DRAM_MAGIC    0x4452414D // "DRAM"
+#define EMC_BASE   0x7001B000
+#define EMC(off) _REG(EMC_BASE, off)
+
+int launch_payload(char *path, int update);