blob: b2958248c06322a8e77113016d4ebc9f207671b7 [file] [log] [blame]
/*
* 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"
/**
* Extract the boot parameters from the FDT and the boot-flow driver.
*/
static bool boot_params_init(struct boot_params *p,
const struct fdt_node *fdt_root)
{
p->mem_ranges_count = 0;
p->kernel_arg = plat_boot_flow_get_kernel_arg();
return plat_boot_flow_get_initrd_range(fdt_root, &p->initrd_begin,
&p->initrd_end) &&
fdt_find_cpus(fdt_root, p->cpu_ids, &p->cpu_count) &&
fdt_find_memory_ranges(fdt_root, p);
}
/**
* 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_boot_flow_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;
}
/**
* Takes action on any updates that were generated.
*/
bool boot_flow_update(struct mm_stage1_locked stage1_locked,
const struct manifest *manifest,
struct boot_params_update *p, struct memiter *cpio,
struct mpool *ppool)
{
return plat_boot_flow_update(stage1_locked, manifest, p, cpio, ppool);
}