1 files changed, 116 insertions, 0 deletions
diff --git a/include/lib/tpm/tpm.h b/include/lib/tpm/tpm.h
new file mode 100644
index 000000000..ac17c0b27
--- /dev/null
+++ b/include/lib/tpm/tpm.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2021 Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ */
+#ifndef TPM_H
+#define TPM_H
+
+#include <lib/utils_def.h>
+
+/*
+ * TPM_ALG_ID constants.
+ * Ref. Table 9 - Definition of (UINT16) TPM_ALG_ID Constants
+ * Trusted Platform Module Library. Part 2: Structures,
+ * Family "2.0", Level 00 Revision 01.38, September 29 2016.
+ */
+enum tpm_hash_alg {
+	TPM_ALG_NONE   = 0x0,
+	TPM_ALG_SHA256 = 0x000B,
+	TPM_ALG_SHA384 = 0x000C,
+	TPM_ALG_SHA512 = 0x000D,
+};
+static inline bool tpm_alg_is_valid(enum tpm_hash_alg alg)
+{
+	switch (alg) {
+	case TPM_ALG_SHA256:
+	case TPM_ALG_SHA384:
+	case TPM_ALG_SHA512:
+		return true;
+
+	default:
+		return false;
+	}
+}
+
+enum tpm_hash_alg_dsize {
+	TPM_ALG_SHA256_DSIZE = 32,
+	TPM_ALG_SHA384_DSIZE = 48,
+	TPM_ALG_SHA512_DSIZE = 64,
+
+	TPM_ALG_MAX_DSIZE = TPM_ALG_SHA512_DSIZE
+};
+static inline size_t tpm_alg_dsize(enum tpm_hash_alg alg)
+{
+	switch (alg) {
+	case TPM_ALG_SHA256:
+		return TPM_ALG_SHA256_DSIZE;
+
+	case TPM_ALG_SHA384:
+		return TPM_ALG_SHA384_DSIZE;
+
+	case TPM_ALG_SHA512:
+		return TPM_ALG_SHA512_DSIZE;
+
+	default:
+		return 0;
+	}
+}
+
+enum tpm_pcr_idx {
+	/*
+	 * SRTM, BIOS, Host Platform Extensions, Embedded
+	 * Option ROMs and PI Drivers
+	 */
+	TPM_PCR_0 = 0,
+	/* Host Platform Configuration */
+	TPM_PCR_1,
+	/* UEFI driver and application Code */
+	TPM_PCR_2,
+	/* UEFI driver and application Configuration and Data */
+	TPM_PCR_3,
+	/* UEFI Boot Manager Code (usually the MBR) and Boot Attempts */
+	TPM_PCR_4,
+	/*
+	 * Boot Manager Code Configuration and Data (for use
+	 * by the Boot Manager Code) and GPT/Partition Table
+	 */
+	TPM_PCR_5,
+	/* Host Platform Manufacturer Specific */
+	TPM_PCR_6,
+	/* Secure Boot Policy */
+	TPM_PCR_7,
+	/* 8-15: Defined for use by the Static OS */
+	TPM_PCR_8,
+	/* Debug */
+	TPM_PCR_16 = 16,
+
+	/* DRTM (1) */
+	TPM_PCR_17 = 17,
+	/* DRTM (2) */
+	TPM_PCR_18 = 18,
+};
+static bool inline tpm_pcr_idx_is_valid(enum tpm_pcr_idx pcr_idx)
+{
+	switch (pcr_idx) {
+	case TPM_PCR_0:
+	case TPM_PCR_1:
+	case TPM_PCR_2:
+	case TPM_PCR_3:
+	case TPM_PCR_4:
+	case TPM_PCR_5:
+	case TPM_PCR_6:
+	case TPM_PCR_7:
+	case TPM_PCR_8:
+	case TPM_PCR_16:
+	case TPM_PCR_17:
+	case TPM_PCR_18:
+		return true;
+
+	default:
+		return false;
+	}
+}
+
+#endif /* TPM_H */