| /* |
| * Copyright (c) 2021, ARM Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <libfdt.h> |
| |
| #include <common/debug.h> |
| #include <common/fdt_fixup.h> |
| #include <common/fdt_wrappers.h> |
| |
| #include <sunxi_private.h> |
| |
| void sunxi_prepare_dtb(void *fdt) |
| { |
| int ret; |
| |
| if (fdt == NULL || fdt_check_header(fdt) != 0) { |
| return; |
| } |
| ret = fdt_open_into(fdt, fdt, 0x100000); |
| if (ret < 0) { |
| ERROR("Preparing devicetree at %p: error %d\n", fdt, ret); |
| return; |
| } |
| |
| /* Reserve memory used by Trusted Firmware. */ |
| if (fdt_add_reserved_memory(fdt, "tf-a@40000000", BL31_BASE, |
| BL31_LIMIT - BL31_BASE)) { |
| WARN("Failed to add reserved memory nodes to DT.\n"); |
| return; |
| } |
| |
| ret = fdt_pack(fdt); |
| if (ret < 0) { |
| ERROR("Failed to pack devicetree at %p: error %d\n", |
| fdt, ret); |
| } else { |
| clean_dcache_range((uintptr_t)fdt, fdt_blob_size(fdt)); |
| INFO("Changed devicetree to reserve BL31 memory.\n"); |
| } |
| } |
