| /* |
| * Copyright 2019 The Hafnium Authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * https://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "hf/boot_flow.h" |
| #include "hf/dlog.h" |
| #include "hf/fdt_handler.h" |
| #include "hf/plat/boot_flow.h" |
| |
| /** |
| * Parses information from FDT needed to initialize Hafnium. |
| * FDT is mapped at the beginning and unmapped before exiting the function. |
| */ |
| bool boot_flow_init(struct mm_stage1_locked stage1_locked, |
| struct manifest *manifest, struct boot_params *boot_params, |
| struct mpool *ppool) |
| { |
| bool ret = false; |
| struct fdt_header *fdt; |
| struct fdt_node fdt_root; |
| enum manifest_return_code manifest_ret; |
| |
| /* Get the memory map from the FDT. */ |
| fdt = fdt_map(stage1_locked, plat_get_fdt_addr(), &fdt_root, ppool); |
| if (fdt == NULL) { |
| dlog("Unable to map FDT.\n"); |
| return false; |
| } |
| |
| if (!fdt_find_child(&fdt_root, "")) { |
| dlog("Unable to find FDT root node.\n"); |
| goto out_unmap_fdt; |
| } |
| |
| manifest_ret = manifest_init(manifest, &fdt_root); |
| if (manifest_ret != MANIFEST_SUCCESS) { |
| dlog("Could not parse manifest: %s.\n", |
| manifest_strerror(manifest_ret)); |
| goto out_unmap_fdt; |
| } |
| |
| if (!boot_params_init(boot_params, &fdt_root)) { |
| dlog("Could not parse boot params.\n"); |
| goto out_unmap_fdt; |
| } |
| |
| ret = true; |
| |
| out_unmap_fdt: |
| if (!fdt_unmap(stage1_locked, fdt, ppool)) { |
| dlog("Unable to unmap FDT.\n"); |
| ret = false; |
| } |
| |
| return ret; |
| } |