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// SPDX-License-Identifier: GPL-2.0+
/*
* Common features for sandbox TPM1 and TPM2 implementations
*
* Copyright 2021 Google LLC
*/
#define LOG_CATEGORY UCLASS_TPM
#include <tpm-v1.h>
#include <tpm-v2.h>
#include <asm/unaligned.h>
#include "sandbox_common.h"
#define TPM_ERR_CODE_OFS (2 + 4) /* after tag and size */
int sb_tpm_index_to_seq(u32 index)
{
index &= ~HR_NV_INDEX;
switch (index) {
case FIRMWARE_NV_INDEX:
return NV_SEQ_FIRMWARE;
case KERNEL_NV_INDEX:
return NV_SEQ_KERNEL;
case BACKUP_NV_INDEX:
return NV_SEQ_BACKUP;
case FWMP_NV_INDEX:
return NV_SEQ_FWMP;
case MRC_REC_HASH_NV_INDEX:
return NV_SEQ_REC_HASH;
case 0:
return NV_SEQ_GLOBAL_LOCK;
case TPM_NV_INDEX_LOCK:
return NV_SEQ_ENABLE_LOCKING;
}
printf("Invalid nv index %#x\n", index);
return -1;
}
void sb_tpm_read_data(const struct nvdata_state nvdata[NV_SEQ_COUNT],
enum sandbox_nv_space seq, u8 *buf, int data_ofs,
int length)
{
const struct nvdata_state *nvd = &nvdata[seq];
if (!nvd->present)
put_unaligned_be32(TPM_BADINDEX, buf + TPM_ERR_CODE_OFS);
else if (length > nvd->length)
put_unaligned_be32(TPM_BAD_DATASIZE, buf + TPM_ERR_CODE_OFS);
else
memcpy(buf + data_ofs, &nvd->data, length);
}
void sb_tpm_write_data(struct nvdata_state nvdata[NV_SEQ_COUNT],
enum sandbox_nv_space seq, const u8 *buf, int data_ofs,
int length)
{
struct nvdata_state *nvd = &nvdata[seq];
if (length > nvd->length)
log_err("Invalid length %x (max %x)\n", length, nvd->length);
else
memcpy(&nvdata[seq].data, buf + data_ofs, length);
}
void sb_tpm_define_data(struct nvdata_state nvdata[NV_SEQ_COUNT],
enum sandbox_nv_space seq, int length)
{
struct nvdata_state *nvd = &nvdata[seq];
if (length > NV_DATA_SIZE)
log_err("Invalid length %x (max %x)\n", length, NV_DATA_SIZE);
nvd->length = length;
nvd->present = true;
}
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