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f9143c1200
Add support for this command, moving away from the previous approach of hard-coding the initial data in the driver, now that the kernel-space data has to be set up by the higher-level vboot code. Signed-off-by: Simon Glass <sjg@chromium.org>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Common features for sandbox TPM1 and TPM2 implementations
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*
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* Copyright 2021 Google LLC
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*/
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#define LOG_CATEGORY UCLASS_TPM
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#include <common.h>
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#include <tpm-v1.h>
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#include <tpm-v2.h>
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#include <asm/unaligned.h>
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#include "sandbox_common.h"
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#define TPM_ERR_CODE_OFS (2 + 4) /* after tag and size */
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int sb_tpm_index_to_seq(u32 index)
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{
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index &= ~HR_NV_INDEX;
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switch (index) {
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case FIRMWARE_NV_INDEX:
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return NV_SEQ_FIRMWARE;
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case KERNEL_NV_INDEX:
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return NV_SEQ_KERNEL;
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case BACKUP_NV_INDEX:
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return NV_SEQ_BACKUP;
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case FWMP_NV_INDEX:
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return NV_SEQ_FWMP;
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case MRC_REC_HASH_NV_INDEX:
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return NV_SEQ_REC_HASH;
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case 0:
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return NV_SEQ_GLOBAL_LOCK;
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case TPM_NV_INDEX_LOCK:
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return NV_SEQ_ENABLE_LOCKING;
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}
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printf("Invalid nv index %#x\n", index);
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return -1;
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}
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void sb_tpm_read_data(const struct nvdata_state nvdata[NV_SEQ_COUNT],
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enum sandbox_nv_space seq, u8 *buf, int data_ofs,
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int length)
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{
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const struct nvdata_state *nvd = &nvdata[seq];
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if (!nvd->present)
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put_unaligned_be32(TPM_BADINDEX, buf + TPM_ERR_CODE_OFS);
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else if (length > nvd->length)
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put_unaligned_be32(TPM_BAD_DATASIZE, buf + TPM_ERR_CODE_OFS);
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else
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memcpy(buf + data_ofs, &nvd->data, length);
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}
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void sb_tpm_write_data(struct nvdata_state nvdata[NV_SEQ_COUNT],
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enum sandbox_nv_space seq, const u8 *buf, int data_ofs,
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int length)
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{
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struct nvdata_state *nvd = &nvdata[seq];
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if (length > nvd->length)
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log_err("Invalid length %x (max %x)\n", length, nvd->length);
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else
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memcpy(&nvdata[seq].data, buf + data_ofs, length);
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}
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void sb_tpm_define_data(struct nvdata_state nvdata[NV_SEQ_COUNT],
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enum sandbox_nv_space seq, int length)
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{
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struct nvdata_state *nvd = &nvdata[seq];
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if (length > NV_DATA_SIZE)
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log_err("Invalid length %x (max %x)\n", length, NV_DATA_SIZE);
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nvd->length = length;
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nvd->present = true;
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}
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