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// SPDX-License-Identifier: Intel
/*
* Copyright (C) 2013, Intel Corporation
* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <asm/hob.h>
/**
* Returns the next instance of a HOB type from the starting HOB.
*
* @type: HOB type to search
* @hob_list: A pointer to the HOB list
*
* @retval: A HOB object with matching type; Otherwise NULL.
*/
const struct hob_header *hob_get_next_hob(uint type, const void *hob_list)
{
const struct hob_header *hdr;
hdr = hob_list;
/* Parse the HOB list until end of list or matching type is found */
while (!end_of_hob(hdr)) {
if (hdr->type == type)
return hdr;
hdr = get_next_hob(hdr);
}
return NULL;
}
/**
* Returns the next instance of the matched GUID HOB from the starting HOB.
*
* @guid: GUID to search
* @hob_list: A pointer to the HOB list
*
* @retval: A HOB object with matching GUID; Otherwise NULL.
*/
const struct hob_header *hob_get_next_guid_hob(const efi_guid_t *guid,
const void *hob_list)
{
const struct hob_header *hdr;
struct hob_guid *guid_hob;
hdr = hob_list;
while ((hdr = hob_get_next_hob(HOB_TYPE_GUID_EXT, hdr))) {
guid_hob = (struct hob_guid *)hdr;
if (!guidcmp(guid, &guid_hob->name))
break;
hdr = get_next_hob(hdr);
}
return hdr;
}
/**
* This function retrieves a GUID HOB data buffer and size.
*
* @hob_list: A HOB list pointer.
* @len: A pointer to the GUID HOB data buffer length.
* If the GUID HOB is located, the length will be updated.
* @guid A pointer to HOB GUID.
*
* @retval NULL: Failed to find the GUID HOB.
* @retval others: GUID HOB data buffer pointer.
*/
void *hob_get_guid_hob_data(const void *hob_list, u32 *len,
const efi_guid_t *guid)
{
const struct hob_header *guid_hob;
guid_hob = hob_get_next_guid_hob(guid, hob_list);
if (!guid_hob)
return NULL;
if (len)
*len = get_guid_hob_data_size(guid_hob);
return get_guid_hob_data(guid_hob);
}
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