Config Linux for omap embedded system

Config Linux for omap embedded system

[Chen leonard-a17094]

Hi, 

I'm a newbie for linux-omap, and am trying to port the linux-omap onto a
specific embedded system, which has 8M/8M rom/ram.

I have some questions regarding with configuring Linux:
1. how to config the total memory when making the kernel? For example,
8M/8M rom/ram.
2. how to specify the startup address when making the kernel? For
example, the kernel is expected to start from 0x0a000000.

3. how to let the linker allocate code/data/stack on specific addresses?
For example, code starts from 0x0a000000, data starts from 0x08000000,
and stack starts from 0x04000000.

Thanks in advance,
Liang 

Re: Config Linux for omap embedded system

[Tony Lindgren]

Hi,

You probably already figured all these out, but just in case...

* Chen leonard-a17094 <liangchen@motorola.com> [060104 18:07]:
> Hi, 
> 
> I'm a newbie for linux-omap, and am trying to port the linux-omap onto a
> specific embedded system, which has 8M/8M rom/ram.
> 
> I have some questions regarding with configuring Linux:
> 1. how to config the total memory when making the kernel? For example,
> 8M/8M rom/ram.

Adding mem=8M to kernel cmdline should do it.

> 2. how to specify the startup address when making the kernel? For
> example, the kernel is expected to start from 0x0a000000.

See Makefile.boot in mach-omap1 directory.
 
> 3. how to let the linker allocate code/data/stack on specific addresses?
> For example, code starts from 0x0a000000, data starts from 0x08000000,
> and stack starts from 0x04000000.

You can set a mapping in .lds file. See the old Psion second stage
bootloader boot2nd at:

http://www.yipton.demon.co.uk/boot2nd/latest/boot2nd.tgz

The file you want to look is boot2nd.lds.

Regards,

Tony