存储配置

1. 选择型号，确认开发板的型号被选中支持。

   SDK 默认支持了几种 SPI NAND，编译之前需要确认开发板的型号被选中支持，如果不在支持列表中， 则需要参考 SPI NAND 移植进行移植。

   uboot 和 SPL 分区一般都比较小，开启的 SPI NAND 型号过多的话存储容易越界，因此建议只打开需要用到的型号即可。

   • uboot
     使用 make um –> Device Drivers –> MTD Support 选择。

     (0x240000) Offset of bbt in nand
     (0x40000) Range of bbt in nand
     [*] Define U-boot binaries locations in SPI NAND
     (0x100000) Location in SPI NAND to read U-Boot from
     [ ] Support Micron SPI NAND
     [ ] Support Macronix SPI NAND
     [*] Support Winbond SPI NAND
     [ ] Support Winbond SPI NAND CONTINUOUS READ MODE
     [*] Support GigaDevice SPI NAND
     [ ] Support Toshiba SPI NAND
     [*] Support FudanMicro SPI NAND
     [*] Support Foresee SPI NAND
     [*] Support Zbit SPI NAND
     [ ] Support Elite SPI NAND
     [ ] Support ESMT SPI NAND
     [ ] Support UMTEK SPI NAND
     SPI Flash Support  --->
     UBI support  --->

   • kernel

     kernel 分区比较大，默认打开了 SDK 支持的所有型号，不用选择。

2. 选择文件系统。

   SPI NAND 文件系统采用 UBIFS， 以 demo128_nand 工程为例，编译后生成固件的名称为d211_demo128_nand_page_2k_block_128k_v1.0.0。

   SDK 也支持 page size 为 4K（很少用到）的 SPINAND，需要在工程的配置文件 target/d211/demo128_nand/image_cfg.json 进行配置：

   "info": { // Header information about image
       "platform": "d211",
       "product": "demo128_nand",
       "version": "1.0.0",
       "media": {
           "type": "spi-nand",
           "device_id": 0,
           "array_organization": [
           //      { "page": "4k", "block": "256k" },
                   { "page": "2k", "block": "128k" },
           ],
       }
   },

3. 分区
   在 target/d211/demo128_nand/image_cfg.json 文件中配置分区信息：

   "spi-nand": { // Device, The name should be the same with string in image:info:media:type
           "size": "128m", // Size of SPI NAND
           "partitions": {
               "spl":      { "size": "1m" },
               "uboot":    { "size": "1m" },
               "userid":   { "size": "256k" },
               "bbt":      { "size": "256k" },
               "env":      { "size": "256k" },
               "env_r":    { "size": "256k" },
               "falcon":   { "size": "256k" },
               "logo":     { "size": "768K" },
               "kernel":   { "size": "12m" },
               "recovery": { "size": "10m" },
               "ubiroot":  {
                   "size": "32m",                          //分区大小为 32m
                   "ubi": { // Volume in UBI device
                       "rootfs": { "size": "-" },
                   },
               },
               "ubisystem": {
                   "size": "-",
                   "ubi": { // Volume in UBI device
                       "ota":   { "size": "48m" },
                       "user":   { "size": "-" },
                   },
               },
           }
       },

4. 调整固件大小。
   固件的大小要和分区大小相匹配，可以自动适配也可以手工调整：

   • 自动适配。使用 make menuconfig 命令进入配置界面后，选择 Filesystem images，示例如下：

     RootFS images  --->
     [ ] UserFS 1  ----
     [ ] UserFS 2  ----
     [ ] UserFS 3  ----
     [ ] Generate burner format image
     [*] Auto calculate partition size to generate image                 //通过分区大小自动生成固件

   • 手工调整。使用 make menuconfig 命令进入配置界面后，选择 Filesystem images > RootFS images，示例如下：

     [ ] ext2/3/4 root filesystem
     [ ] cpio the root filesystem (for use as an initial RAM filesystem)
     [ ] initial RAM filesystem linked into linux kernel
     [ ] jffs2 root filesystem
     [ ] squashfs root filesystem
     [ ] tar the root filesystem
         ubi parameter select (spi-nand all type support)  --->
     [*] ubi image containing an ubifs root filesystem
     [ ]   Use custom config file
     ()    Additional ubinize options
     -*- ubifs root filesystem
     (0x2000000) ubifs size(Should be aligned to MB)                      //固件大小，32M
     ubifs runtime compression (lzo)  --->
     Compression method (no compression)  --->
     (-F)  Additional mkfs.ubifs options

"spi-nor": { // Media type
    "size": "16m", // Size of NOR
    "partitions": {
        "spl":    { "size": "256k" },
        "uboot":  { "size": "640k" },
        "userid": { "size": "64k" },
        "env":    { "size": "64k" },
        "env_r":  { "size": "64k" },
        "falcon": { "size": "64k" },
        "logo":   { "size": "512k" },
        "kernel": { "size": "5m" },
        "rootfs": { "size": "9m" },
        // "user":   { "size": "-" },
    }
}

1. 分区
   分区信息在 target/d211/demo/image_cfg.json 中

   "mmc": { // Media type
       "size": "4G", // Size of SD/eMMC
       "partitions": { // Partition table apply to device
           "spl":    { "offset": "0x4400", "size": "495k" },
           "uboot":  { "size": "1m" },
           "env":    { "size": "256k" },
           "falcon": { "size": "256k" },
           "logo":   { "size": "512k" },
           "kernel": { "size": "16m" },
           "rootfs": { "size": "72m" },        //分区大小为 72M
           "user":   { "size": "-" },
       },
   },

2. 固件

   固件的大小调整通过 make menuconfig –> Filesystem images –> RootFS images 调整。

   [*] ext2/3/4 root filesystem
   ext2/3/4 variant (ext4)  --->
   (rootfs) filesystem label
   (72M) exact size                                                 //固件大小为 72M
   (0)   exact number of inodes (leave at 0 for auto calculation)
   (5)   reserved blocks percentage
   (-O ^64bit) additional mke2fs options
   Compression method (no compression)  --->
   [ ] cpio the root filesystem (for use as an initial RAM filesystem)
   [ ] initial RAM filesystem linked into linux kernel