imx: support for i.MX8 SoCs misc IPC

NXP's i.MX8 SoCs have system controller (M4 core) which takes
control of misc functions like temperature alarm, dma etc., other
Cortex-A clusters can send out command via MU (Message Unit) to
system controller for misc operation etc..

This patch adds misc IPC(inter-processor communication) support.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
diff --git a/plat/imx/common/sci/svc/misc/sci_misc_rpc.h b/plat/imx/common/sci/svc/misc/sci_misc_rpc.h
new file mode 100644
index 0000000..03b1a51
--- /dev/null
+++ b/plat/imx/common/sci/svc/misc/sci_misc_rpc.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017-2019 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*!
+ * Header file for the MISC RPC implementation.
+ *
+ * @addtogroup MISC_SVC
+ * @{
+ */
+
+#ifndef SC_MISC_RPC_H
+#define SC_MISC_RPC_H
+
+/* Includes */
+
+/* Defines */
+
+/*!
+ * @name Defines for RPC MISC function calls
+ */
+/*@{*/
+#define MISC_FUNC_UNKNOWN 0	/* Unknown function */
+#define MISC_FUNC_SET_CONTROL 1U	/* Index for misc_set_control() RPC call */
+#define MISC_FUNC_GET_CONTROL 2U	/* Index for misc_get_control() RPC call */
+#define MISC_FUNC_SET_MAX_DMA_GROUP 4U	/* Index for misc_set_max_dma_group() RPC call */
+#define MISC_FUNC_SET_DMA_GROUP 5U	/* Index for misc_set_dma_group() RPC call */
+#define MISC_FUNC_SECO_IMAGE_LOAD 8U	/* Index for misc_seco_image_load() RPC call */
+#define MISC_FUNC_SECO_AUTHENTICATE 9U	/* Index for misc_seco_authenticate() RPC call */
+#define MISC_FUNC_SECO_FUSE_WRITE 20U	/* Index for misc_seco_fuse_write() RPC call */
+#define MISC_FUNC_SECO_ENABLE_DEBUG 21U	/* Index for misc_seco_enable_debug() RPC call */
+#define MISC_FUNC_SECO_FORWARD_LIFECYCLE 22U	/* Index for misc_seco_forward_lifecycle() RPC call */
+#define MISC_FUNC_SECO_RETURN_LIFECYCLE 23U	/* Index for misc_seco_return_lifecycle() RPC call */
+#define MISC_FUNC_SECO_BUILD_INFO 24U	/* Index for misc_seco_build_info() RPC call */
+#define MISC_FUNC_SECO_CHIP_INFO 25U	/* Index for misc_seco_chip_info() RPC call */
+#define MISC_FUNC_DEBUG_OUT 10U	/* Index for misc_debug_out() RPC call */
+#define MISC_FUNC_WAVEFORM_CAPTURE 6U	/* Index for misc_waveform_capture() RPC call */
+#define MISC_FUNC_BUILD_INFO 15U	/* Index for misc_build_info() RPC call */
+#define MISC_FUNC_UNIQUE_ID 19U	/* Index for misc_unique_id() RPC call */
+#define MISC_FUNC_SET_ARI 3U	/* Index for misc_set_ari() RPC call */
+#define MISC_FUNC_BOOT_STATUS 7U	/* Index for misc_boot_status() RPC call */
+#define MISC_FUNC_BOOT_DONE 14U	/* Index for misc_boot_done() RPC call */
+#define MISC_FUNC_OTP_FUSE_READ 11U	/* Index for misc_otp_fuse_read() RPC call */
+#define MISC_FUNC_OTP_FUSE_WRITE 17U	/* Index for misc_otp_fuse_write() RPC call */
+#define MISC_FUNC_SET_TEMP 12U	/* Index for misc_set_temp() RPC call */
+#define MISC_FUNC_GET_TEMP 13U	/* Index for misc_get_temp() RPC call */
+#define MISC_FUNC_GET_BOOT_DEV 16U	/* Index for misc_get_boot_dev() RPC call */
+#define MISC_FUNC_GET_BUTTON_STATUS 18U	/* Index for misc_get_button_status() RPC call */
+/*@}*/
+
+/* Types */
+
+/* Functions */
+
+/*!
+ * This function dispatches an incoming MISC RPC request.
+ *
+ * @param[in]     caller_pt   caller partition
+ * @param[in]     msg         pointer to RPC message
+ */
+void misc_dispatch(sc_rm_pt_t caller_pt, sc_rpc_msg_t *msg);
+
+/*!
+ * This function translates and dispatches an MISC RPC request.
+ *
+ * @param[in]     ipc         IPC handle
+ * @param[in]     msg         pointer to RPC message
+ */
+void misc_xlate(sc_ipc_t ipc, sc_rpc_msg_t *msg);
+
+#endif				/* SC_MISC_RPC_H */
+
+/**@}*/