1 files changed, 82 insertions, 0 deletions
diff --git a/include/services/drtm_svc_plat.h b/include/services/drtm_svc_plat.h
new file mode 100644
index 000000000..be4cedfc2
--- /dev/null
+++ b/include/services/drtm_svc_plat.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2021 Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ * DRTM service's dependencies on the platform.
+ *
+ */
+#ifndef ARM_DRTM_SVC_PLAT_H
+#define ARM_DRTM_SVC_PLAT_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#if !defined(DRTM_SHA_ALG)
+#error "The DRTM service requires definition of the DRTM_SHA_ALG macro"
+#else
+
+#if DRTM_SHA_ALG == 256
+#define DRTM_SHA_ALG_DSIZE  32
+#elif DRTM_SHA_ALG == 384
+#define DRTM_SHA_ALG_DSIZE  48
+#elif DRTM_SHA_ALG == 512
+#define DRTM_SHA_ALG_DSIZE  64
+#else
+#warning "Unrecognised DRTM_SHA_ALG"
+#define DRTM_SHA_ALG_DSIZE  64
+#endif
+
+#endif
+
+
+/***
+ * DRTM's dependency on platform DMA protection.
+ */
+
+/* Sanity checks. */
+bool plat_has_non_host_platforms(void);
+bool plat_has_unmanaged_dma_peripherals(void);
+unsigned int plat_get_total_num_smmus(void);
+
+/* Dependency on Arm-compliant SMMUs. */
+void plat_enumerate_smmus(const uintptr_t (*smmus_out)[],
+                          size_t *smmu_count_out);
+
+struct drtm_mem_region_descr_table_v1;
+typedef struct drtm_mem_region_descr_table_v1 struct_drtm_mem_region_descr_table;
+
+/* Dependencies on platform-specific region-based DMA protection. */
+struct drtm_dma_protector_ops {
+	int (*protect_regions)(void *data,
+	                       const struct_drtm_mem_region_descr_table *regions);
+};
+struct drtm_dma_protector {
+	void *data;
+	struct drtm_dma_protector_ops *ops;
+};
+struct drtm_dma_protector plat_get_dma_protector(void);
+
+
+/***
+ * DRTM's platform-specific DRTM TCB hashes.
+ */
+
+struct plat_drtm_tcb_hash {
+	union {
+#define _HASH_ID_TYPE uint32_t
+		_HASH_ID_TYPE uint32;
+		unsigned char uchars[sizeof(_HASH_ID_TYPE)];
+#undef  _HASH_ID_TYPE
+	} hash_id;
+        size_t hash_bytes;
+        unsigned char hash_val[DRTM_SHA_ALG_DSIZE];
+};
+#define PLAT_DRTM_TCB_HASH_VAL_AND_SIZE(...) \
+	.hash_bytes = sizeof((unsigned char[]){ __VA_ARGS__ }), .hash_val = { __VA_ARGS__ }
+
+void plat_enumerate_drtm_tcb_hashes(const struct plat_drtm_tcb_hash **hashes_out,
+                                    size_t *hashes_count_out);
+
+#endif /* ARM_DRTM_SVC_PLAT_H */