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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2026 Amarula Solutions, Dario Binacchi <[email protected]>
*/
#include <fwu.h>
#include <part_efi.h>
#include <asm/io.h>
/**
* fwu_plat_get_bootidx() - Get the value of the boot index
* @boot_idx: Boot index value
*
* Get the value of the bank(partition) from which the platform
* has booted. This value is passed to U-Boot from the earlier
* stage bootloader which loads and boots all the relevant
* firmware images
*
*/
void fwu_plat_get_bootidx(uint *boot_idx)
{
*boot_idx = (readl(TAMP_FWU_BOOT_INFO_REG) >>
TAMP_FWU_BOOT_IDX_OFFSET) & TAMP_FWU_BOOT_IDX_MASK;
}
int fwu_platform_hook(struct udevice *dev, struct fwu_data *data)
{
uint boot_idx;
efi_guid_t boot_uuid, root_uuid;
const efi_guid_t boot_type_guid = PARTITION_XBOOTLDR;
const efi_guid_t root_type_guid =
PARTITION_LINUX_FILE_SYSTEM_DATA_GUID;
char uuidbuf[UUID_STR_LEN + 1];
int retb, retr;
fwu_plat_get_bootidx(&boot_idx);
retb = fwu_mdata_get_image_guid(&boot_uuid, &boot_type_guid, boot_idx);
retr = fwu_mdata_get_image_guid(&root_uuid, &root_type_guid, boot_idx);
if (!retb && !retr) {
uuid_bin_to_str(boot_uuid.b, uuidbuf, UUID_STR_FORMAT_GUID);
env_set("boot_partuuid", uuidbuf);
uuid_bin_to_str(root_uuid.b, uuidbuf, UUID_STR_FORMAT_GUID);
env_set("root_partuuid", uuidbuf);
} else if (!retb && retr) {
log_warning("%s: found boot GUID but missing root GUID (%d)\n",
__func__, retr);
} else if (!retr && retb) {
log_warning("%s: found root GUID but missing boot GUID (%d)\n",
__func__, retb);
}
return 0;
}
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