feat(drtm): add platform functions for DRTM

Added platform hooks to retrieve DRTM features and
address map.
Additionally, implemented these hooks for the FVP platform.

Signed-off-by: John Powell <john.powell@arm.com>
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I5621cc9807ffff8139ae8876250147f7b2c76759

3 files changed, 175 insertions, 3 deletions

diff --git a/services/std_svc/drtm/drtm_main.c b/services/std_svc/drtm/drtm_main.c
index adb929379..843fc5d35 100644
--- a/services/std_svc/drtm/drtm_main.c
+++ b/services/std_svc/drtm/drtm_main.c
@@ -14,22 +14,33 @@
 
 #include <arch.h>
 #include <arch_helpers.h>
+#include <common/bl_common.h>
 #include <common/debug.h>
 #include <common/runtime_svc.h>
 #include <drivers/auth/crypto_mod.h>
 #include "drtm_main.h"
+#include <lib/xlat_tables/xlat_tables_v2.h>
+#include <plat/common/platform.h>
 #include <services/drtm_svc.h>
+#include <platform_def.h>
 
-/* This value is used by the SMC to advertise the boot PE */
-static uint64_t boot_pe_aff_value;
+/* Structure to store DRTM features specific to the platform. */
+static drtm_features_t plat_drtm_features;
+
+/* DRTM-formatted memory map. */
+static drtm_memory_region_descriptor_table_t *plat_drtm_mem_map;
 
 int drtm_setup(void)
 {
 	bool rc;
+	const plat_drtm_tpm_features_t *plat_tpm_feat;
+	const plat_drtm_dma_prot_features_t *plat_dma_prot_feat;
+	uint64_t dlme_data_min_size;
 
 	INFO("DRTM service setup\n");
 
-	boot_pe_aff_value = read_mpidr_el1() & MPIDR_AFFINITY_MASK;
+	/* Read boot PE ID from MPIDR */
+	plat_drtm_features.boot_pe_id = read_mpidr_el1() & MPIDR_AFFINITY_MASK;
 
 	rc = drtm_dma_prot_init();
 	if (rc) {
@@ -43,6 +54,68 @@ int drtm_setup(void)
 	 */
 	crypto_mod_init();
 
+	/* Build DRTM-compatible address map. */
+	plat_drtm_mem_map = drtm_build_address_map();
+	if (plat_drtm_mem_map == NULL) {
+		return INTERNAL_ERROR;
+	}
+
+	/* Get DRTM features from platform hooks. */
+	plat_tpm_feat = plat_drtm_get_tpm_features();
+	if (plat_tpm_feat == NULL) {
+		return INTERNAL_ERROR;
+	}
+
+	plat_dma_prot_feat = plat_drtm_get_dma_prot_features();
+	if (plat_dma_prot_feat == NULL) {
+		return INTERNAL_ERROR;
+	}
+
+	/*
+	 * Add up minimum DLME data memory.
+	 *
+	 * For systems with complete DMA protection there is only one entry in
+	 * the protected regions table.
+	 */
+	if (plat_dma_prot_feat->dma_protection_support ==
+			ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_COMPLETE) {
+		dlme_data_min_size =
+			sizeof(drtm_memory_region_descriptor_table_t) +
+			sizeof(drtm_mem_region_t);
+	} else {
+		/*
+		 * TODO set protected regions table size based on platform DMA
+		 * protection configuration
+		 */
+		panic();
+	}
+
+	dlme_data_min_size += (drtm_get_address_map_size() +
+			       PLAT_DRTM_EVENT_LOG_MAX_SIZE +
+			       plat_drtm_get_tcb_hash_table_size() +
+			       plat_drtm_get_imp_def_dlme_region_size());
+
+	dlme_data_min_size = page_align(dlme_data_min_size, UP)/PAGE_SIZE;
+
+	/* Fill out platform DRTM features structure */
+	/* Only support default PCR schema (0x1) in this implementation. */
+	ARM_DRTM_TPM_FEATURES_SET_PCR_SCHEMA(plat_drtm_features.tpm_features,
+		ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_DEFAULT);
+	ARM_DRTM_TPM_FEATURES_SET_TPM_HASH(plat_drtm_features.tpm_features,
+		plat_tpm_feat->tpm_based_hash_support);
+	ARM_DRTM_TPM_FEATURES_SET_FW_HASH(plat_drtm_features.tpm_features,
+		plat_tpm_feat->firmware_hash_algorithm);
+	ARM_DRTM_MIN_MEM_REQ_SET_MIN_DLME_DATA_SIZE(plat_drtm_features.minimum_memory_requirement,
+		dlme_data_min_size);
+	ARM_DRTM_MIN_MEM_REQ_SET_DCE_SIZE(plat_drtm_features.minimum_memory_requirement,
+		plat_drtm_get_min_size_normal_world_dce());
+	ARM_DRTM_DMA_PROT_FEATURES_SET_MAX_REGIONS(plat_drtm_features.dma_prot_features,
+		plat_dma_prot_feat->max_num_mem_prot_regions);
+	ARM_DRTM_DMA_PROT_FEATURES_SET_DMA_SUPPORT(plat_drtm_features.dma_prot_features,
+		plat_dma_prot_feat->dma_protection_support);
+	ARM_DRTM_TCB_HASH_FEATURES_SET_MAX_NUM_HASHES(plat_drtm_features.tcb_hash_features,
+		plat_drtm_get_tcb_hash_features());
+
 	return 0;
 }
 
diff --git a/services/std_svc/drtm/drtm_main.h b/services/std_svc/drtm/drtm_main.h
index 4c1adac04..b60d95458 100644
--- a/services/std_svc/drtm/drtm_main.h
+++ b/services/std_svc/drtm/drtm_main.h
@@ -23,4 +23,15 @@ enum drtm_retc {
 	MEM_PROTECT_INVALID = -6,
 };
 
+typedef struct {
+	uint64_t tpm_features;
+	uint64_t minimum_memory_requirement;
+	uint64_t dma_prot_features;
+	uint64_t boot_pe_id;
+	uint64_t tcb_hash_features;
+} drtm_features_t;
+
+drtm_memory_region_descriptor_table_t *drtm_build_address_map(void);
+uint64_t drtm_get_address_map_size(void);
+
 #endif /* DRTM_MAIN_H */
diff --git a/services/std_svc/drtm/drtm_res_address_map.c b/services/std_svc/drtm/drtm_res_address_map.c
new file mode 100644
index 000000000..86367061e
--- /dev/null
+++ b/services/std_svc/drtm/drtm_res_address_map.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ */
+
+#include <stdint.h>
+
+#include <plat/common/platform.h>
+#include <services/drtm_svc.h>
+#include <platform_def.h>
+
+/* Address map revision generated by this code. */
+#define DRTM_ADDRESS_MAP_REVISION	U(0x0001)
+
+/* Amount of space needed for address map based on PLAT_DRTM_MMAP_ENTRIES */
+#define DRTM_ADDRESS_MAP_SIZE (sizeof(drtm_memory_region_descriptor_table_t) + \
+			       (sizeof(drtm_mem_region_t) * \
+				PLAT_DRTM_MMAP_ENTRIES))
+
+/* Allocate space for DRTM-formatted address map to be constructed. */
+static uint8_t drtm_address_map[DRTM_ADDRESS_MAP_SIZE];
+
+static uint64_t drtm_address_map_size;
+
+drtm_memory_region_descriptor_table_t *drtm_build_address_map(void)
+{
+	/* Set up pointer to DRTM memory map. */
+	drtm_memory_region_descriptor_table_t *map =
+		(drtm_memory_region_descriptor_table_t *)drtm_address_map;
+
+	/* Get the platform memory map. */
+	const mmap_region_t *mmap = plat_get_addr_mmap();
+	unsigned int i;
+
+	/* Set up header for address map structure. */
+	map->revision = DRTM_ADDRESS_MAP_REVISION;
+	map->reserved = 0x0000;
+
+	/* Iterate through mmap and generate DRTM address map. */
+	for (i = 0U; mmap[i].base_pa != 0UL; i++) {
+		/* Set PA of region. */
+		map->region[i].region_address = mmap[i].base_pa;
+
+		/* Set size of region (in 4kb chunks). */
+		map->region[i].region_size_type = 0;
+		ARM_DRTM_REGION_SIZE_TYPE_SET_4K_PAGE_NUM(
+			map->region[i].region_size_type,
+			mmap[i].size / PAGE_SIZE_4KB);
+
+		/* Set type and cacheability. */
+		switch (MT_TYPE(mmap[i].attr)) {
+		case MT_DEVICE:
+			ARM_DRTM_REGION_SIZE_TYPE_SET_REGION_TYPE(
+				map->region[i].region_size_type,
+				ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_DEVICE);
+			break;
+		case MT_NON_CACHEABLE:
+			ARM_DRTM_REGION_SIZE_TYPE_SET_REGION_TYPE(
+				map->region[i].region_size_type,
+				ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_NCAR);
+			ARM_DRTM_REGION_SIZE_TYPE_SET_CACHEABILITY(
+				map->region[i].region_size_type,
+				ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_NC);
+			break;
+		case MT_MEMORY:
+			ARM_DRTM_REGION_SIZE_TYPE_SET_REGION_TYPE(
+				map->region[i].region_size_type,
+				ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_NORMAL);
+			break;
+		default:
+			return NULL;
+		}
+	}
+
+	map->num_regions = i;
+
+	/* Store total size of address map. */
+	drtm_address_map_size = sizeof(drtm_memory_region_descriptor_table_t);
+	drtm_address_map_size += (i * sizeof(drtm_mem_region_t));
+
+	return map;
+}
+
+uint64_t drtm_get_address_map_size(void)
+{
+	return drtm_address_map_size;
+}