mediatek: mt8195: Add SiP service

Add the basic SiP service

Change-Id: I21fe9d85eac4be9101b12c4b6c28294c5b93cb5f
Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>

plat/mediatek/mt8195/include/plat_sip_calls.h

+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLAT_SIP_CALLS_H
+#define PLAT_SIP_CALLS_H
+
+/*******************************************************************************
+ * Plat SiP function constants
+ ******************************************************************************/
+#define MTK_PLAT_SIP_NUM_CALLS    0
+
+#endif /* PLAT_SIP_CALLS_H */

plat/mediatek/mt8195/plat_sip_calls.c

+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common/debug.h>
+#include <common/runtime_svc.h>
+
+uintptr_t mediatek_plat_sip_handler(uint32_t smc_fid,
+				u_register_t x1,
+				u_register_t x2,
+				u_register_t x3,
+				u_register_t x4,
+				void *cookie,
+				void *handle,
+				u_register_t flags)
+{
+	switch (smc_fid) {
+	default:
+		ERROR("%s: unhandled SMC (0x%x)\n", __func__, smc_fid);
+		break;
+	}
+
+	SMC_RET1(handle, SMC_UNK);
+}

plat/mediatek/mt8195/platform.mk

@@ -36,6 +36,7 @@ BL31_SOURCES += common/desc_image_load.c                              \
                 ${MTK_PLAT}/common/drivers/timer/mt_timer.c           \
                 ${MTK_PLAT}/common/mtk_cirq.c                         \
                 ${MTK_PLAT}/common/mtk_plat_common.c                  \
+                ${MTK_PLAT}/common/mtk_sip_svc.c                      \
                 ${MTK_PLAT}/common/params_setup.c                     \
                 ${MTK_PLAT_SOC}/aarch64/platform_common.c             \
                 ${MTK_PLAT_SOC}/aarch64/plat_helpers.S                \
@@ -45,6 +46,7 @@ BL31_SOURCES += common/desc_image_load.c                              \
                 ${MTK_PLAT_SOC}/drivers/mcdi/mt_mcdi.c                \
                 ${MTK_PLAT_SOC}/drivers/spmc/mtspmc.c                 \
                 ${MTK_PLAT_SOC}/plat_pm.c                             \
+                ${MTK_PLAT_SOC}/plat_sip_calls.c                      \
                 ${MTK_PLAT_SOC}/plat_topology.c
 
 # Configs for A78 and A55