NUC970 配置文件位于 include/configs/nuc970_evb.h
#ifndef __CONFIG_H
#define __CONFIG_H
#define EXT_CLK 12000000 /* 12 MHz crystal */
外部采用12M晶振
#define CONFIG_SYS_TEXT_BASE 0xE00000
#define CONFIG_SYS_LOAD_ADDR 0x8000
#define CONFIG_SYS_MEMTEST_START 0xA00000
#define CONFIG_SYS_MEMTEST_END 0xB00000
#define CONFIG_ARCH_CPU_INIT
#undef CONFIG_USE_IRQ
#define CONFIG_CMDLINE_TAG 1 /* enable passing of ATAGs */
#define CONFIG_SETUP_MEMORY_TAGS 1
#define CONFIG_INITRD_TAG 1
/*#define CONFIG_NUC970_HW_CHECKSUM */
/*#define CONFIG_SYS_USE_SPIFLASH */
#define CONFIG_SYS_USE_NANDFLASH
#define CONFIG_ENV_IS_IN_NAND
/*#define CONFIG_ENV_IS_IN_SPI_FLASH */
/*#define CONFIG_ENV_IS_IN_MMC */
#define CONFIG_BOARD_EARLY_INIT_F
#define CONFIG_BOARD_LATE_INIT
#define CONFIG_HW_WATCHDOG
#define CONFIG_SYS_BOOTM_LEN 0x1000000 /* 16MB max kernel size */
#define CONFIG_BOOTDELAY 1
/*启动中 指定只有esc按键才能进入uboot*/
#define CONFIG_AUTOBOOT_KEYED 1
#define CONFIG_AUTOBOOT_PROMPT "Press ESC to abort autoboot in %d seconds"
#define CONFIG_AUTOBOOT_DELAY_STR "linux"
#define CONFIG_AUTOBOOT_STOP_STR "\x1b" //esc按键
#define CONFIG_SYS_SDRAM_BASE 0
#define CONFIG_NR_DRAM_BANKS 2 /* there are 2 sdram banks for nuc970 */
#define CONFIG_SYS_INIT_SP_ADDR 0xBC008000
#define CONFIG_BAUDRATE 115200
#define CONFIG_SYS_BAUDRATE_TABLE {115200, 57600, 38400}
/*#define CONFIG_NUC970_EMAC1*/
/*#define CONFIG_CMD_NET */
#define CONFIG_ETHADDR 00:00:00:11:66:88
#define CONFIG_SYS_RX_ETH_BUFFER 16 // default is 4, set to 16 here.
/*#define CONFIG_KPI_NUC970*/
/*#undef CONFIG_SYS_ICACHE_OFF */
/*#undef CONFIG_SYS_DCACHE_OFF */
/*#define CONFIG_SYS_ICACHE_OFF*/
#define CONFIG_SYS_DCACHE_OFF
/*
* BOOTP options
*/
#if 1
#define CONFIG_BOOTP_BOOTFILESIZE 1
#define CONFIG_BOOTP_BOOTPATH 1
#define CONFIG_BOOTP_GATEWAY 1
#define CONFIG_BOOTP_HOSTNAME 1
#define CONFIG_BOOTP_SERVERIP /* tftp serverip not overruled by dhcp server */
#endif
/*
* Command line configuration.
*/
#if 0
#include <config_cmd_default.h>
#undef CONFIG_CMD_LOADS
#undef CONFIG_CMD_SOURCE
#endif
#if 0
#ifdef CONFIG_SYS_USE_SPIFLASH
#undef CONFIG_CMD_IMLS /*====================> SPI only */
#undef CONFIG_CMD_JFFS2
#endif
#ifdef CONFIG_KPI_NUC970
/*#define CONFIG_KPI_PA_PORT 1 */ /* KPI select PA port */
#define CONFIG_KPI_PH_PORT 1 /* KPI select PH port */
#define CONFIG_KPI_ROW_NUM 3 /* row number is 1~4 */
#define CONFIG_KPI_COL_NUM 3 /* col number is 1~8 */
#define CONFIG_KPI_DEBOUNCE 8 /* debounce length setting: 0~13 */
#endif
#endif
#ifdef CONFIG_SYS_USE_NANDFLASH
#define CONFIG_CMD_NAND 1
#define CONFIG_CMD_UBI 1
#define CONFIG_CMD_UBIFS 1
#define CONFIG_MTD_UBI_WL_THRESHOLD 4096 /* CWWeng 2017.2.13 */
#define CONFIG_MTD_UBI_BEB_LIMIT 20 /* CWWeng 2017.2.13 */
#define CONFIG_CMD_MTDPARTS 1
#define CONFIG_MTD_DEVICE 1
#define CONFIG_MTD_PARTITIONS 1
#define CONFIG_RBTREE 1
#define CONFIG_LZO 1
#define CONFIG_SYS_NAND_ONFI_DETECTION 1
#define MTDIDS_DEFAULT "nand0=nand0"
/*#define MTDPARTS_DEFAULT "mtdparts=nand0:0x200000@0x0(u-boot),0x1400000@0x200000(kernel),-(user)"*/
/*#define MTD_ACTIVE_PART "nand0,2"*/
#define MTDPARTS_DEFAULT "mtdparts=nand0:8M(bootstrap/uboot/kernel)ro,16M(rootfs),16M(appbin),-(appdapa)"
mtdparts nandflash分区配置信息，此信息和kernel里.config里id,地址要求一致
#define MTD_ACTIVE_PART "nand0,1"
/* #define CONFIG_CMD_NAND_YAFFS2 1 */
/* #define CONFIG_YAFFS2 1 */
#define CONFIG_SYS_MAX_NAND_DEVICE 1
#define CONFIG_SYS_NAND_BASE 0xB000D000
#define CONFIG_SYS_NAND_ECCBYTES 12
#ifdef CONFIG_ENV_IS_IN_NAND
#define CONFIG_ENV_OFFSET 0x80000
#define CONFIG_ENV_SIZE 0x10000
#define CONFIG_ENV_SECT_SIZE 0x20000
#define CONFIG_ENV_RANGE (4 * CONFIG_ENV_SECT_SIZE) /* Env range : 0x80000 ~ 0x100000 */
#define CONFIG_ENV_OVERWRITE
#endif
#define CONFIG_BOOTCOMMAND "nboot 0x7fc0 0 0x200000 ;"\
"bootm 0x7fc0"
#endif
nboot 0x7fc0 0 0x200000 命令将 Linux 内核镜像文件从 NAND flash 偏移量 0x200000 这个地址读取到 DDR 0x7fc0 的地址.。
bootm 0x7fc0 命令是用来启动由 mkimage 工具产生的 Linux 内核或其他应用程序。相较于 bootm 命令， go 命令是来启动 “非” 经由 mkimage 工具产生的。
#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x100000 /* Offset to RAM U-Boot image */
#define CONFIG_SPL_TEXT_BASE 0x200
#define CONFIG_SPL_STACK 0xBC008000
#define CONFIG_SPL_NAND_SIMPLE
#define CONFIG_SPL_NAND_LOAD
#define CONFIG_SPL_NAND_BASE
#define CONFIG_SPL_NAND_DRIVERS
#define CONFIG_SPL_NAND_ECC
#ifdef CONFIG_SPL_BUILD /* CONFIG_NAND_SPL */
/* base address for uboot */
#define CONFIG_SYS_PHY_UBOOT_BASE (CONFIG_SYS_SDRAM_BASE + 0xE00000)
#define CONFIG_SYS_NAND_U_BOOT_DST CONFIG_SYS_PHY_UBOOT_BASE /* NUB load-addr */
#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_NAND_U_BOOT_DST /* NUB start-addr */
#define CONFIG_SYS_NAND_U_BOOT_SIZE (500 * 1024) /* Size of RAM U-Boot image */
#endif
#if 0
/* SPI flash */
#ifdef CONFIG_SYS_USE_SPIFLASH
#define CONFIG_SPI 1
#ifdef CONFIG_ENV_IS_IN_SPI_FLASH
#define CONFIG_ENV_OFFSET 0x80000
#define CONFIG_ENV_SIZE 0x10000
#define CONFIG_ENV_SECT_SIZE 0x10000
#define CONFIG_ENV_OVERWRITE
#endif
#endif
#endif
/*#define CONFIG_SYS_PROMPT "U-Boot> " */
#define CONFIG_SYS_CBSIZE 256
#define CONFIG_SYS_MAXARGS 16
#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
#define CONFIG_SYS_LONGHELP 1
#define CONFIG_CMDLINE_EDITING 1
#define CONFIG_AUTO_COMPLETE
#define CONFIG_SYS_PROMPT_HUSH_PS2 "> "
#if 0
/* Following block is for LCD support */
#ifdef CONFIG_LCD
/*#define CONFIG_NUC977_LCD*/
#define LCD_BPP LCD_COLOR16
#define CONFIG_LCD_LOGO
#define CONFIG_LCD_INFO
#define CONFIG_LCD_INFO_BELOW_LOGO
/*#define CONFIG_SYS_CONSOLE_IS_IN_ENV*/
/*#define CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE*/
#define CONFIG_CONSOLE_SCROLL_LINES 1
#endif
#endif
#if 0
/* Following block is for MMC support */
#ifdef CONFIG_NUC970_MMC
#define CONFIG_CMD_MMC
#define CONFIG_CMD_FAT
/*#define CONFIG_MMC */
/*#define CONFIG_GENERIC_MMC */
#define CONFIG_DOS_PARTITION
/*#define CONFIG_MMC_TRACE */
/*#define CONFIG_NUC970_SD_PORT0 */
/*#define CONFIG_NUC970_SD_PORT1 */
/*#define CONFIG_NUC970_EMMC */ /* Don't enable eMMC(CONFIG_NUC970_EMMC) and NAND(CONFIG_NAND_NUC970) at the same time! */
#ifdef CONFIG_ENV_IS_IN_MMC
#define CONFIG_SYS_MMC_ENV_DEV 1
#define CONFIG_ENV_OFFSET 0x80000
#define CONFIG_ENV_SIZE /*2048*/0x10000
#define CONFIG_ENV_SECT_SIZE 512
#define CONFIG_ENV_OVERWRITE
#endif
#endif
#endif
/* Following block is for EHCI support*/
#if 1
/*#define CONFIG_CMD_USB*/
/*#define CONFIG_CMD_FAT*/
/*#define CONFIG_USB_STORAGE*/
/*#define CONFIG_USB_EHCI*/
/*#define CONFIG_USB_EHCI_NUC970*/
#define CONFIG_EHCI_HCD_INIT_AFTER_RESET
#define CONFIG_DOS_PARTITION
#endif
/*#define CONFIG_OF_LIBFDT */
/*#define CONFIG_FIT */
/*
* Size of malloc() pool
*/
#define CONFIG_SYS_MALLOC_LEN (1024*1024) /*ROUND(3 * CONFIG_ENV_SIZE + 128*1024, 0x1000) */
#define CONFIG_STACKSIZE (32*1024) /* regular stack */
#endif