Linux 如何更改 U-Boot 内存映射
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How to change U-Boot memory map
提问by mura_no
The U-Boot(2009.03) on MS104-SH4 has the RAM memory map shown below.
MS104-SH4 上的 U-Boot(2009.03) 具有如下所示的 RAM 内存映射。
0x8c000000 Not for use (4kB)
0x8c001000 for Linux kernel & root file system (3MB)
0x8c400000 for Linux process (28MB)
0x8c000000 不使用 (4kB)
0x8c001000 用于 Linux 内核和根文件系统 (3MB)
0x8c400000 用于 Linux 进程 (28MB)
For me, 3MB for Linux kernel & root file system is too small because Linux kernel & ramdisk has 1MB and 3.5MB respectively. So I'd like to change above memory map, for example like shown below.
对我来说，Linux 内核和根文件系统的 3MB 太小了，因为 Linux 内核和 ramdisk 分别有 1MB 和 3.5MB。所以我想改变上面的内存映射，例如如下所示。
0x8c000000 Not for use (4KB)
0x8c001000 for Linux kernel & root file system (16MB)
0x8cf60000 for Linux process (16MB)
0x8c000000 不使用 (4KB)
0x8c001000 用于 Linux 内核和根文件系统 (16MB)
0x8cf60000 用于 Linux 进程 (16MB)
In my guess, I have to modify uboot source code, but cannot find where I should modify. Does somebody tell me if it is possible to modify u-boot memory map? If yes, please also tell me how to do it. Thanks for your help!
在我的猜测中，我必须修改 uboot 源代码，但找不到我应该修改的地方。有人告诉我是否可以修改 u-boot 内存映射？如果是，也请告诉我怎么做。谢谢你的帮助！
I found a similar question on How to find the memory map of a device?, but my SH4 iomem is empty (0 size) so looks like other topic.
我在How to find the memory map of a device上发现了一个类似的问题？，但我的 SH4 iomem 是空的（0 大小）所以看起来像其他主题。
采纳答案by raj_gt1
It is possible to modify U-boot memory map. you need to modify source code of U-boot .U-boot/include/configs/<board_name.h>is the place where you can configure memory map . where <board_name.h>is your architecture specific file and has #defineentries which you can change to desirable values. u-boot/arch/<architecture_name>/lib/board.cperform the memory map initialization.
可以修改 U-boot 内存映射。你需要修改 U-boot 的源代码。U-boot/include/configs/<board_name.h>是您可以配置内存映射的地方。<board_name.h>您的体系结构特定文件在哪里，并且具有#define您可以更改为所需值的条目。u-boot/arch/<architecture_name>/lib/board.c执行内存映射初始化。
