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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 <common.h>
- #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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