/* * Copyright (c) 2020, ARM Limited. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause * * The Arm Ltd. FPGA images start execution at address 0x0, which is * mapped at an (emulated) ROM image. The payload uploader can write to * this memory, but write access by the CPU cores is prohibited. * * Provide a simple trampoline to start BL31 execution at the actual * load address. We put the DTB address in x0, so any code in DRAM could * make use of that information (not yet used in BL31 right now). */ #include #include .text .global _start _start: mov_imm x1, BL31_BASE /* beginning of DRAM */ mov_imm x0, FPGA_PRELOADED_DTB_BASE br x1