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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Common functions between firmware and kernel verified boot.
* (Firmware portion)
*/
#include "2sysincludes.h"
#include "2common.h"
#include "vboot_api.h"
#include "vboot_common.h"
#include "utility.h"
vb2_error_t VbSharedDataInit(VbSharedDataHeader *header, uint64_t size)
{
VB2_DEBUG("VbSharedDataInit, %d bytes, header %d bytes\n", (int)size,
(int)sizeof(VbSharedDataHeader));
if (size < sizeof(VbSharedDataHeader)) {
VB2_DEBUG("Not enough data for header.\n");
return VBOOT_SHARED_DATA_INVALID;
}
if (size < VB_SHARED_DATA_MIN_SIZE) {
VB2_DEBUG("Shared data buffer too small.\n");
return VBOOT_SHARED_DATA_INVALID;
}
if (!header)
return VBOOT_SHARED_DATA_INVALID;
/* Zero the header */
memset(header, 0, sizeof(VbSharedDataHeader));
/* Initialize fields */
header->magic = VB_SHARED_DATA_MAGIC;
header->struct_version = VB_SHARED_DATA_VERSION;
header->struct_size = sizeof(VbSharedDataHeader);
header->data_size = size;
header->data_used = sizeof(VbSharedDataHeader);
header->firmware_index = 0xFF;
/* Success */
return VBOOT_SUCCESS;
}
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