blob: e1e257c260b1f47dc98c5b26b149c079fb03f206 [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/check.h"
#include "hf/cpio.h"
#include "hf/dlog.h"
#include "hf/fdt_handler.h"
#include "hf/plat/boot_flow.h"
#include "hf/std.h"
/* Set by arch-specific boot-time hook. */
uintreg_t plat_boot_flow_fdt_addr;
/**
* Returns the physical address of board FDT. This was passed to Hafnium in the
* first kernel arg by the boot loader.
*/
paddr_t plat_boot_flow_get_fdt_addr(void)
{
return pa_init((uintpaddr_t)plat_boot_flow_fdt_addr);
}
/**
* When handing over to the primary, give it the same FDT address that was given
* to Hafnium. The FDT may have been modified during Hafnium init.
*/
uintreg_t plat_boot_flow_get_kernel_arg(void)
{
return plat_boot_flow_fdt_addr;
}
/**
* Load initrd range from the board FDT.
*/
bool plat_boot_flow_get_initrd_range(const struct fdt_node *fdt_root,
paddr_t *begin, paddr_t *end)
{
return fdt_find_initrd(fdt_root, begin, end);
}
bool plat_boot_flow_update(struct mm_stage1_locked stage1_locked,
const struct manifest *manifest,
struct boot_params_update *update,
struct memiter *cpio, struct mpool *ppool)
{
struct memiter primary_initrd;
const struct string *filename =
&manifest->vm[HF_PRIMARY_VM_INDEX].primary.ramdisk_filename;
if (string_is_empty(filename)) {
memiter_init(&primary_initrd, NULL, 0);
} else if (!cpio_get_file(cpio, filename, &primary_initrd)) {
dlog("Unable to find primary initrd \"%s\".\n",
string_data(filename));
return false;
}
update->initrd_begin = pa_from_va(va_from_ptr(primary_initrd.next));
update->initrd_end = pa_from_va(va_from_ptr(primary_initrd.limit));
return fdt_patch(stage1_locked, plat_boot_flow_get_fdt_addr(), update,
ppool);
}