riscv: board: Add nx25-ae250 to support RISC-V

Add nx25-ae250 board to do platform initializations.

Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Signed-off-by: Greentime Hu <green.hu@gmail.com>

board/AndesTech/nx25-ae250/Kconfig

@@ -0,0 +1,24 @@
+if TARGET_NX25_AE250
+
+config SYS_CPU
+	default "nx25"
+
+config SYS_BOARD
+	default "nx25-ae250"
+
+config SYS_VENDOR
+	default "AndesTech"
+
+config SYS_SOC
+	default "ae250"
+
+config SYS_CONFIG_NAME
+	default "nx25-ae250"
+
+config ENV_SIZE
+	default 0x2000 if ENV_IS_IN_SPI_FLASH
+
+config ENV_OFFSET
+	default 0x140000 if ENV_IS_IN_SPI_FLASH
+
+endif

board/AndesTech/nx25-ae250/MAINTAINERS

@@ -0,0 +1,6 @@
+NX25-AE250 BOARD
+M:	Rick Chen <rick@andestech.com>
+S:	Maintained
+F:	board/AndesTech/nx25-ae250/
+F:	include/configs/nx25-ae250.h
+F:	configs/nx25-ae250_defconfig

board/AndesTech/nx25-ae250/Makefile

@@ -0,0 +1,8 @@
+#
+# Copyright (C) 2017 Andes Technology Corporation.
+# Rick Chen, Andes Technology Corporation <rick@andestech.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= nx25-ae250.o

board/AndesTech/nx25-ae250/nx25-ae250.c

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2017 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/mach-types.h>
+#include <common.h>
+#if defined(CONFIG_FTMAC100) && !defined(CONFIG_DM_ETH)
+#include <netdev.h>
+#endif
+#include <linux/io.h>
+#include <faraday/ftsdc010.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Miscellaneous platform dependent initializations
+ */
+
+int board_init(void)
+{
+	gd->bd->bi_arch_number = MACH_TYPE_AE250;
+	gd->bd->bi_boot_params = PHYS_SDRAM_0 + 0x400;
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	unsigned long sdram_base = PHYS_SDRAM_0;
+	unsigned long expected_size = PHYS_SDRAM_0_SIZE + PHYS_SDRAM_1_SIZE;
+	unsigned long actual_size;
+
+	actual_size = get_ram_size((void *)sdram_base, expected_size);
+	gd->ram_size = actual_size;
+
+	if (expected_size != actual_size) {
+		printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
+			actual_size >> 20, expected_size >> 20);
+	}
+
+	return 0;
+}
+
+int dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_0;
+	gd->bd->bi_dram[0].size =  PHYS_SDRAM_0_SIZE;
+	gd->bd->bi_dram[1].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[1].size =  PHYS_SDRAM_1_SIZE;
+
+	return 0;
+}
+
+#if defined(CONFIG_FTMAC100) && !defined(CONFIG_DM_ETH)
+int board_eth_init(bd_t *bd)
+{
+	return ftmac100_initialize(bd);
+}
+#endif
+
+ulong board_flash_get_legacy(ulong base, int banknum, flash_info_t *info)
+{
+	return 0;
+}
+
+int board_mmc_init(bd_t *bis)
+{
+#ifndef CONFIG_DM_MMC
+#ifdef CONFIG_FTSDC010
+	ftsdc010_mmc_init(0);
+#endif
+#endif
+	return 0;
+}