1 files changed, 35 insertions, 0 deletions
diff --git a/plat/nvidia/tegra/soc/t194/plat_smmu.c b/plat/nvidia/tegra/soc/t194/plat_smmu.c
new file mode 100644
index 0000000..710d5c5
--- /dev/null
+++ b/plat/nvidia/tegra/soc/t194/plat_smmu.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common/bl_common.h>
+#include <common/debug.h>
+#include <smmu.h>
+#include <tegra_def.h>
+
+#define BOARD_SYSTEM_FPGA_BASE		U(1)
+#define BASE_CONFIG_SMMU_DEVICES	U(2)
+#define MAX_NUM_SMMU_DEVICES		U(3)
+
+static uint32_t tegra_misc_read_32(uint32_t off)
+{
+	return mmio_read_32((uintptr_t)TEGRA_MISC_BASE + off);
+}
+
+/*******************************************************************************
+ * Handler to return the support SMMU devices number
+ ******************************************************************************/
+uint32_t plat_get_num_smmu_devices(void)
+{
+	uint32_t ret_num = MAX_NUM_SMMU_DEVICES;
+	uint32_t board_revid = ((tegra_misc_read_32(MISCREG_EMU_REVID) >>
+							BOARD_SHIFT_BITS) & BOARD_MASK_BITS);
+
+	if (board_revid == BOARD_SYSTEM_FPGA_BASE) {
+		ret_num = BASE_CONFIG_SMMU_DEVICES;
+	}
+
+	return ret_num;
+}