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185f812c41
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Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
84 lines
2 KiB
C
84 lines
2 KiB
C
// SPDX-License-Identifier: Intel
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/*
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* Copyright (C) 2013, Intel Corporation
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* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
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*/
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#include <common.h>
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#include <asm/hob.h>
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/**
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* Returns the next instance of a HOB type from the starting HOB.
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*
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* @type: HOB type to search
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* @hob_list: A pointer to the HOB list
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*
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* Return: A HOB object with matching type; Otherwise NULL.
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*/
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const struct hob_header *hob_get_next_hob(uint type, const void *hob_list)
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{
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const struct hob_header *hdr;
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hdr = hob_list;
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/* Parse the HOB list until end of list or matching type is found */
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while (!end_of_hob(hdr)) {
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if (hdr->type == type)
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return hdr;
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hdr = get_next_hob(hdr);
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}
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return NULL;
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}
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/**
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* Returns the next instance of the matched GUID HOB from the starting HOB.
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*
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* @guid: GUID to search
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* @hob_list: A pointer to the HOB list
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*
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* Return: A HOB object with matching GUID; Otherwise NULL.
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*/
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const struct hob_header *hob_get_next_guid_hob(const efi_guid_t *guid,
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const void *hob_list)
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{
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const struct hob_header *hdr;
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struct hob_guid *guid_hob;
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hdr = hob_list;
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while ((hdr = hob_get_next_hob(HOB_TYPE_GUID_EXT, hdr))) {
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guid_hob = (struct hob_guid *)hdr;
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if (!guidcmp(guid, &guid_hob->name))
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break;
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hdr = get_next_hob(hdr);
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}
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return hdr;
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}
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/**
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* This function retrieves a GUID HOB data buffer and size.
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*
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* @hob_list: A HOB list pointer.
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* @len: A pointer to the GUID HOB data buffer length.
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* If the GUID HOB is located, the length will be updated.
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* @guid A pointer to HOB GUID.
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*
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* Return: NULL: Failed to find the GUID HOB.
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* Return: others: GUID HOB data buffer pointer.
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*/
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void *hob_get_guid_hob_data(const void *hob_list, u32 *len,
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const efi_guid_t *guid)
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{
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const struct hob_header *guid_hob;
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guid_hob = hob_get_next_guid_hob(guid, hob_list);
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if (!guid_hob)
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return NULL;
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if (len)
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*len = get_guid_hob_data_size(guid_hob);
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return get_guid_hob_data(guid_hob);
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}
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