U-boot UBI直接从磁盘写入

Question

I'm flashing a filesystem to nand from u-boot. 我正在将文件系统从u-boot刷新到nand。 I have the compressed filesystem stored in an mmc. 我已将压缩文件系统存储在mmc中。 Normally I'd do something like this: 通常我会做这样的事情：

ext4load mmc mmcdev:mmcpart address path
...
ubi write address name size

The problem I have is that ext4load loads the ubifs into ram, and the fs exceeds the amount of ram that is available. 我的问题是ext4load将ubifs加载到ram中，而fs超出了可用的ram数量。

Is there a way to write the fs directly from mmc to nand? 有没有办法将fs直接从mmc写入nand？ Something like this: 像这样：

ubi write mmcdev:mmcpart name size

Answer 1

Given that writing to nand from u-boot is limited by the device's ram, I ended up writing the ubifs from user space. 鉴于从u-boot写入nand受设备的ram限制，我最终从用户空间写入ubif。

Basically, 基本上，

Pass mtdparts to kernel as boot argument 将mtdparts作为启动参数传递给内核
flash_erase mtd partition flash_erase mtd分区
ubiattach partition ubiattach分区
create volume with ubimkvol 用ubimkvol创建体积
write ubifs with ubiupdatevol 用ubiupdatevol编写ubif
ubidetach partition 通用分区

Here are some useful links: 以下是一些有用的链接：

U-boot UBI直接从磁盘写入

问题描述

1 个解决方案

解决方案1
0 已采纳 2016-11-04 02:05:26

U-boot UBI直接从磁盘写入

问题描述

1 个解决方案

解决方案1 0 已采纳 2016-11-04 02:05:26

解决方案1
0 已采纳 2016-11-04 02:05:26