diff --git a/drivers/arm/ethosn/ethosn_smc.c b/drivers/arm/ethosn/ethosn_smc.c
new file mode 100644
index 0000000..299d07c
--- /dev/null
+++ b/drivers/arm/ethosn/ethosn_smc.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <common/debug.h>
+#include <common/runtime_svc.h>
+#include <drivers/arm/ethosn.h>
+#include <drivers/delay_timer.h>
+#include <lib/mmio.h>
+#include <plat/arm/common/fconf_ethosn_getter.h>
+
+/* Arm Ethos-N NPU (NPU) status */
+#define ETHOSN_STATUS \
+	FCONF_GET_PROPERTY(hw_config, ethosn_config, status)
+
+/* Number of NPU cores available */
+#define ETHOSN_NUM_CORES \
+	FCONF_GET_PROPERTY(hw_config, ethosn_config, num_cores)
+
+/* Address to an NPU core  */
+#define ETHOSN_CORE_ADDR(core_idx) \
+	FCONF_GET_PROPERTY(hw_config, ethosn_core_addr, core_idx)
+
+/* NPU core sec registry address */
+#define ETHOSN_CORE_SEC_REG(core_addr, reg_offset) \
+	(core_addr + reg_offset)
+
+/* Reset timeout in us */
+#define ETHOSN_RESET_TIMEOUT_US		U(10 * 1000 * 1000)
+#define ETHOSN_RESET_WAIT_US		U(1)
+
+#define SEC_DEL_REG			U(0x0004)
+#define SEC_DEL_VAL			U(0x81C)
+#define SEC_DEL_EXCC_MASK		U(0x20)
+
+#define SEC_SECCTLR_REG			U(0x0010)
+#define SEC_SECCTLR_VAL			U(0x3)
+
+#define SEC_DEL_MMUSID_REG		U(0x2008)
+#define SEC_DEL_MMUSID_VAL		U(0x3FFFF)
+
+#define SEC_DEL_ADDR_EXT_REG		U(0x201C)
+#define SEC_DEL_ADDR_EXT_VAL		U(0x15)
+
+#define SEC_SYSCTRL0_REG		U(0x0018)
+#define SEC_SYSCTRL0_SOFT_RESET		U(3U << 29)
+#define SEC_SYSCTRL0_HARD_RESET		U(1U << 31)
+
+static void ethosn_delegate_to_ns(uintptr_t core_addr)
+{
+	mmio_setbits_32(ETHOSN_CORE_SEC_REG(core_addr, SEC_SECCTLR_REG),
+			SEC_SECCTLR_VAL);
+
+	mmio_setbits_32(ETHOSN_CORE_SEC_REG(core_addr, SEC_DEL_REG),
+			SEC_DEL_VAL);
+
+	mmio_setbits_32(ETHOSN_CORE_SEC_REG(core_addr, SEC_DEL_MMUSID_REG),
+			SEC_DEL_MMUSID_VAL);
+
+	mmio_setbits_32(ETHOSN_CORE_SEC_REG(core_addr, SEC_DEL_ADDR_EXT_REG),
+			SEC_DEL_ADDR_EXT_VAL);
+}
+
+static int ethosn_is_sec(void)
+{
+	if ((mmio_read_32(ETHOSN_CORE_SEC_REG(ETHOSN_CORE_ADDR(0), SEC_DEL_REG))
+		& SEC_DEL_EXCC_MASK) != 0U) {
+		return 0;
+	}
+
+	return 1;
+}
+
+static bool ethosn_reset(uintptr_t core_addr, int hard_reset)
+{
+	unsigned int timeout;
+	const uintptr_t sysctrl0_reg =
+		ETHOSN_CORE_SEC_REG(core_addr, SEC_SYSCTRL0_REG);
+	const uint32_t reset_val = (hard_reset != 0) ? SEC_SYSCTRL0_HARD_RESET
+						    : SEC_SYSCTRL0_SOFT_RESET;
+
+	mmio_write_32(sysctrl0_reg, reset_val);
+
+	/* Wait for reset to complete */
+	for (timeout = 0U; timeout < ETHOSN_RESET_TIMEOUT_US;
+			   timeout += ETHOSN_RESET_WAIT_US) {
+
+		if ((mmio_read_32(sysctrl0_reg) & reset_val) == 0U) {
+			break;
+		}
+
+		udelay(ETHOSN_RESET_WAIT_US);
+	}
+
+	return timeout < ETHOSN_RESET_TIMEOUT_US;
+}
+
+uintptr_t ethosn_smc_handler(uint32_t smc_fid,
+			     u_register_t core_idx,
+			     u_register_t x2,
+			     u_register_t x3,
+			     u_register_t x4,
+			     void *cookie,
+			     void *handle,
+			     u_register_t flags)
+{
+	uintptr_t core_addr;
+	int hard_reset = 0;
+
+	/* Only SiP fast calls are expected */
+	if ((GET_SMC_TYPE(smc_fid) != SMC_TYPE_FAST) ||
+		(GET_SMC_OEN(smc_fid) != OEN_SIP_START)) {
+		SMC_RET1(handle, SMC_UNK);
+	}
+
+	/* Truncate parameters to 32-bits for SMC32 */
+	if (GET_SMC_CC(smc_fid) == SMC_32) {
+		core_idx &= 0xFFFFFFFF;
+		x2 &= 0xFFFFFFFF;
+		x3 &= 0xFFFFFFFF;
+		x4 &= 0xFFFFFFFF;
+	}
+
+	if (!is_ethosn_fid(smc_fid)) {
+		SMC_RET1(handle, SMC_UNK);
+	}
+
+	if (ETHOSN_STATUS == ETHOSN_STATUS_DISABLED) {
+		WARN("ETHOSN: Arm Ethos-N NPU not available\n");
+		SMC_RET1(handle, ETHOSN_NOT_SUPPORTED);
+	}
+
+	switch (smc_fid & FUNCID_NUM_MASK) {
+	case ETHOSN_FNUM_VERSION:
+		SMC_RET2(handle, ETHOSN_VERSION_MAJOR, ETHOSN_VERSION_MINOR);
+	case ETHOSN_FNUM_IS_SEC:
+		SMC_RET1(handle, ethosn_is_sec());
+	case ETHOSN_FNUM_HARD_RESET:
+		hard_reset = 1;
+		/* Fallthrough */
+	case ETHOSN_FNUM_SOFT_RESET:
+		if (core_idx >= ETHOSN_NUM_CORES) {
+			WARN("ETHOSN: core index out of range\n");
+			SMC_RET1(handle, ETHOSN_CORE_IDX_OUT_OF_RANGE);
+		}
+
+		core_addr = ETHOSN_CORE_ADDR(core_idx);
+
+		if (!ethosn_reset(core_addr, hard_reset)) {
+			SMC_RET1(handle, ETHOSN_FAILURE);
+		}
+
+		ethosn_delegate_to_ns(core_addr);
+
+		SMC_RET1(handle, ETHOSN_SUCCESS);
+	default:
+		SMC_RET1(handle, SMC_UNK);
+	}
+}