build(intel): add N5X as a new Intel platform

This commit adds a new Intel platform called N5X.
This preliminary patch only have Bl31 support.

Signed-off-by: Abdul Halim, Muhammad Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Signed-off-by: Sieu Mun Tang <sieu.mun.tang@intel.com>
Change-Id: Ib31f9c4a5a0dabdce81c1d5b0d4776188add7195
diff --git a/plat/intel/soc/common/include/platform_def.h b/plat/intel/soc/common/include/platform_def.h
index 55600ee..91417c3 100644
--- a/plat/intel/soc/common/include/platform_def.h
+++ b/plat/intel/soc/common/include/platform_def.h
@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 2019-2020, ARM Limited and Contributors. All rights reserved.
- * Copyright (c) 2019-2020, Intel Corporation. All rights reserved.
+ * Copyright (c) 2019-2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2019-2022, Intel Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -13,8 +13,10 @@
 #include <common/tbbr/tbbr_img_def.h>
 #include <plat/common/common_def.h>
 
+/* Platform Type */
 #define PLAT_SOCFPGA_STRATIX10			1
 #define PLAT_SOCFPGA_AGILEX			2
+#define PLAT_SOCFPGA_N5X			3
 
 /* sysmgr.boot_scratch_cold4 & 5 used for CPU release address for SPL */
 #define PLAT_CPU_RELEASE_ADDR			0xffd12210
diff --git a/plat/intel/soc/common/soc/socfpga_reset_manager.c b/plat/intel/soc/common/soc/socfpga_reset_manager.c
index 32604c9..b0de60e 100644
--- a/plat/intel/soc/common/soc/socfpga_reset_manager.c
+++ b/plat/intel/soc/common/soc/socfpga_reset_manager.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Intel Corporation. All rights reserved.
+ * Copyright (c) 2019-2022, Intel Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -134,7 +134,7 @@
 #if PLATFORM_MODEL == PLAT_SOCFPGA_STRATIX10
 	mmio_setbits_32(SOCFPGA_RSTMGR(BRGMODRST),
 		~(RSTMGR_FIELD(BRG, DDRSCH) | RSTMGR_FIELD(BRG, FPGA2SOC)));
-#elif PLATFORM_MODEL == PLAT_SOCFPGA_AGILEX
+#else
 	mmio_setbits_32(SOCFPGA_RSTMGR(BRGMODRST),
 		~(RSTMGR_FIELD(BRG, MPFE) | RSTMGR_FIELD(BRG, FPGA2SOC)));
 #endif
diff --git a/plat/intel/soc/n5x/bl31_plat_setup.c b/plat/intel/soc/n5x/bl31_plat_setup.c
new file mode 100644
index 0000000..aeed3ac
--- /dev/null
+++ b/plat/intel/soc/n5x/bl31_plat_setup.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2020-2022, Intel Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <arch.h>
+#include <arch_helpers.h>
+#include <common/bl_common.h>
+#include <drivers/arm/gicv2.h>
+#include <drivers/ti/uart/uart_16550.h>
+#include <lib/mmio.h>
+#include <lib/xlat_tables/xlat_tables.h>
+
+#include "socfpga_mailbox.h"
+#include "socfpga_private.h"
+
+static entry_point_info_t bl32_image_ep_info;
+static entry_point_info_t bl33_image_ep_info;
+
+entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type)
+{
+	entry_point_info_t *next_image_info;
+
+	next_image_info = (type == NON_SECURE) ?
+			  &bl33_image_ep_info : &bl32_image_ep_info;
+
+	/* None of the images on this platform can have 0x0 as the entrypoint */
+	if (next_image_info->pc) {
+		return next_image_info;
+	} else {
+		return NULL;
+	}
+}
+
+void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
+				u_register_t arg2, u_register_t arg3)
+{
+	static console_t console;
+
+	mmio_write_64(PLAT_SEC_ENTRY, 0);
+
+	console_16550_register(PLAT_UART0_BASE, PLAT_UART_CLOCK, PLAT_BAUDRATE,
+		&console);
+	/*
+	 * Check params passed from BL31 should not be NULL,
+	 */
+	void *from_bl2 = (void *) arg0;
+
+	bl_params_t *params_from_bl2 = (bl_params_t *)from_bl2;
+
+	assert(params_from_bl2 != NULL);
+
+	/*
+	 * Copy BL32 (if populated by BL31) and BL33 entry point information.
+	 * They are stored in Secure RAM, in BL31's address space.
+	 */
+
+	if (params_from_bl2->h.type == PARAM_BL_PARAMS &&
+		params_from_bl2->h.version >= VERSION_2) {
+
+		bl_params_node_t *bl_params = params_from_bl2->head;
+
+		while (bl_params != NULL) {
+			if (bl_params->image_id == BL33_IMAGE_ID)
+				bl33_image_ep_info = *bl_params->ep_info;
+
+			bl_params = bl_params->next_params_info;
+		}
+	} else {
+		struct socfpga_bl31_params *arg_from_bl2 =
+			(struct socfpga_bl31_params *) from_bl2;
+
+		assert(arg_from_bl2->h.type == PARAM_BL31);
+		assert(arg_from_bl2->h.version >= VERSION_1);
+
+		bl32_image_ep_info = *arg_from_bl2->bl32_ep_info;
+		bl33_image_ep_info = *arg_from_bl2->bl33_ep_info;
+	}
+	SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
+}
+
+static const interrupt_prop_t s10_interrupt_props[] = {
+	PLAT_INTEL_SOCFPGA_G1S_IRQ_PROPS(GICV2_INTR_GROUP0),
+	PLAT_INTEL_SOCFPGA_G0_IRQ_PROPS(GICV2_INTR_GROUP0)
+};
+
+static unsigned int target_mask_array[PLATFORM_CORE_COUNT];
+
+static const gicv2_driver_data_t plat_gicv2_gic_data = {
+	.gicd_base = PLAT_INTEL_SOCFPGA_GICD_BASE,
+	.gicc_base = PLAT_INTEL_SOCFPGA_GICC_BASE,
+	.interrupt_props = s10_interrupt_props,
+	.interrupt_props_num = ARRAY_SIZE(s10_interrupt_props),
+	.target_masks = target_mask_array,
+	.target_masks_num = ARRAY_SIZE(target_mask_array),
+};
+
+/*******************************************************************************
+ * Perform any BL3-1 platform setup code
+ ******************************************************************************/
+void bl31_platform_setup(void)
+{
+	socfpga_delay_timer_init();
+
+	/* Initialize the gic cpu and distributor interfaces */
+	gicv2_driver_init(&plat_gicv2_gic_data);
+	gicv2_distif_init();
+	gicv2_pcpu_distif_init();
+	gicv2_cpuif_enable();
+
+	/* Signal secondary CPUs to jump to BL31 (BL2 = U-boot SPL) */
+	mmio_write_64(PLAT_CPU_RELEASE_ADDR,
+		(uint64_t)plat_secondary_cpus_bl31_entry);
+
+	mailbox_hps_stage_notify(HPS_EXECUTION_STATE_SSBL);
+}
+
+const mmap_region_t plat_dm_mmap[] = {
+	MAP_REGION_FLAT(DRAM_BASE, DRAM_SIZE,
+		MT_MEMORY | MT_RW | MT_NS),
+	MAP_REGION_FLAT(DEVICE1_BASE, DEVICE1_SIZE,
+		MT_DEVICE | MT_RW | MT_NS),
+	MAP_REGION_FLAT(DEVICE2_BASE, DEVICE2_SIZE,
+		MT_DEVICE | MT_RW | MT_SECURE),
+	MAP_REGION_FLAT(OCRAM_BASE, OCRAM_SIZE,
+		MT_NON_CACHEABLE | MT_RW | MT_SECURE),
+	MAP_REGION_FLAT(DEVICE3_BASE, DEVICE3_SIZE,
+		MT_DEVICE | MT_RW | MT_SECURE),
+	MAP_REGION_FLAT(MEM64_BASE, MEM64_SIZE,
+		MT_DEVICE | MT_RW | MT_NS),
+	MAP_REGION_FLAT(DEVICE4_BASE, DEVICE4_SIZE,
+		MT_DEVICE | MT_RW | MT_NS),
+	{0}
+};
+
+/*******************************************************************************
+ * Perform the very early platform specific architectural setup here. At the
+ * moment this is only intializes the mmu in a quick and dirty way.
+ ******************************************************************************/
+void bl31_plat_arch_setup(void)
+{
+	const mmap_region_t bl_regions[] = {
+		MAP_REGION_FLAT(BL31_BASE, BL31_END - BL31_BASE,
+			MT_MEMORY | MT_RW | MT_SECURE),
+		MAP_REGION_FLAT(BL_CODE_BASE, BL_CODE_END - BL_CODE_BASE,
+			MT_CODE | MT_SECURE),
+		MAP_REGION_FLAT(BL_RO_DATA_BASE,
+			BL_RO_DATA_END - BL_RO_DATA_BASE,
+			MT_RO_DATA | MT_SECURE),
+#if USE_COHERENT_MEM
+		MAP_REGION_FLAT(BL_COHERENT_RAM_BASE,
+			BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE,
+			MT_DEVICE | MT_RW | MT_SECURE),
+#endif
+		{0}
+	};
+
+	setup_page_tables(bl_regions, plat_dm_mmap);
+	enable_mmu_el3(0);
+}
diff --git a/plat/intel/soc/n5x/include/socfpga_plat_def.h b/plat/intel/soc/n5x/include/socfpga_plat_def.h
new file mode 100644
index 0000000..3b87df8
--- /dev/null
+++ b/plat/intel/soc/n5x/include/socfpga_plat_def.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2020-2022, Intel Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLAT_SOCFPGA_DEF_H
+#define PLAT_SOCFPGA_DEF_H
+
+#include <platform_def.h>
+
+/* Platform Setting */
+#define PLATFORM_MODEL				PLAT_SOCFPGA_N5X
+#define BOOT_SOURCE				BOOT_SOURCE_SDMMC
+
+/* Register Mapping */
+#define SOCFPGA_MMC_REG_BASE			U(0xff808000)
+
+#define SOCFPGA_RSTMGR_REG_BASE			U(0xffd11000)
+#define SOCFPGA_SYSMGR_REG_BASE			U(0xffd12000)
+
+#define SOCFPGA_L4_PER_SCR_REG_BASE			U(0xffd21000)
+#define SOCFPGA_L4_SYS_SCR_REG_BASE			U(0xffd21100)
+#define SOCFPGA_SOC2FPGA_SCR_REG_BASE			U(0xffd21200)
+#define SOCFPGA_LWSOC2FPGA_SCR_REG_BASE			U(0xffd21300)
+
+#endif /* PLAT_SOCFPGA_DEF_H */
diff --git a/plat/intel/soc/n5x/platform.mk b/plat/intel/soc/n5x/platform.mk
new file mode 100644
index 0000000..f139848
--- /dev/null
+++ b/plat/intel/soc/n5x/platform.mk
@@ -0,0 +1,49 @@
+#
+# Copyright (c) 2020-2022, Intel Corporation. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+PLAT_INCLUDES		:=	\
+			-Iplat/intel/soc/n5x/include/			\
+			-Iplat/intel/soc/common/drivers/		\
+			-Iplat/intel/soc/common/include/
+
+# Include GICv2 driver files
+include drivers/arm/gic/v2/gicv2.mk
+DM_GICv2_SOURCES	:=	\
+			${GICV2_SOURCES}                                \
+			plat/common/plat_gicv2.c
+
+
+PLAT_BL_COMMON_SOURCES	:=	\
+			${DM_GICv2_SOURCES}				\
+			drivers/delay_timer/delay_timer.c		\
+			drivers/delay_timer/generic_delay_timer.c  	\
+			drivers/ti/uart/aarch64/16550_console.S		\
+			lib/xlat_tables/aarch64/xlat_tables.c 		\
+			lib/xlat_tables/xlat_tables_common.c 		\
+			plat/intel/soc/common/aarch64/platform_common.c \
+			plat/intel/soc/common/aarch64/plat_helpers.S	\
+			plat/intel/soc/common/socfpga_delay_timer.c
+
+BL2_SOURCES     +=
+
+BL31_SOURCES	+=	\
+		drivers/arm/cci/cci.c					\
+		lib/cpus/aarch64/aem_generic.S				\
+		lib/cpus/aarch64/cortex_a53.S				\
+		plat/common/plat_psci_common.c				\
+		plat/intel/soc/n5x/bl31_plat_setup.c			\
+		plat/intel/soc/common/socfpga_psci.c			\
+		plat/intel/soc/common/socfpga_sip_svc.c			\
+		plat/intel/soc/common/socfpga_topology.c		\
+		plat/intel/soc/common/sip/socfpga_sip_fcs.c		\
+		plat/intel/soc/common/soc/socfpga_mailbox.c		\
+		plat/intel/soc/common/soc/socfpga_reset_manager.c
+
+PROGRAMMABLE_RESET_ADDRESS	:= 0
+BL2_AT_EL3			:= 1
+BL2_INV_DCACHE			:= 0
+MULTI_CONSOLE_API		:= 1
+USE_COHERENT_MEM		:= 1