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