1 files changed, 76 insertions, 0 deletions
diff --git a/plat/arm/board/fvp/fvp_drtm_dma_prot.c b/plat/arm/board/fvp/fvp_drtm_dma_prot.c
new file mode 100644
index 0000000..38ff7fe
--- /dev/null
+++ b/plat/arm/board/fvp/fvp_drtm_dma_prot.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#include <drivers/arm/smmu_v3.h>
+#include <lib/utils_def.h>
+#include <plat/arm/common/arm_config.h>
+#include <plat/common/platform.h>
+
+#include <platform_def.h>
+
+/**
+ * Array mentioning number of SMMUs supported by FVP
+ */
+static const uintptr_t fvp_smmus[] = {
+	PLAT_FVP_SMMUV3_BASE,
+};
+
+bool plat_has_non_host_platforms(void)
+{
+	/* FVP base platforms typically have GPU, as per FVP Reference guide */
+	return true;
+}
+
+bool plat_has_unmanaged_dma_peripherals(void)
+{
+	/*
+	 * FVP Reference guide does not show devices that are described as
+	 * DMA-capable but not managed by an SMMU in the FVP documentation.
+	 * However, the SMMU seems to have only been introduced in the RevC
+	 * revision.
+	 */
+	return (arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) == 0;
+}
+
+unsigned int plat_get_total_smmus(void)
+{
+	if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) {
+		return ARRAY_SIZE(fvp_smmus);
+	} else {
+		return 0;
+	}
+}
+
+void plat_enumerate_smmus(const uintptr_t **smmus_out,
+			  size_t *smmu_count_out)
+{
+	if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) {
+		*smmus_out = fvp_smmus;
+		*smmu_count_out = ARRAY_SIZE(fvp_smmus);
+	} else {
+		*smmus_out = NULL;
+		*smmu_count_out = 0;
+	}
+}
+
+/* DRTM DMA Protection Features */
+static const plat_drtm_dma_prot_features_t dma_prot_features = {
+	.max_num_mem_prot_regions = 0, /* No protection regions are present */
+	.dma_protection_support = 0x1 /* Complete DMA protection only */
+};
+
+const plat_drtm_dma_prot_features_t *plat_drtm_get_dma_prot_features(void)
+{
+	return &dma_prot_features;
+}
+
+uint64_t plat_drtm_dma_prot_get_max_table_bytes(void)
+{
+	return 0U;
+}