Hello,
On Tue, Mar 18, 2014 at 09:22:20PM +0800, 吴若凡 wrote:
I am now facing a problem that I want to use a specific ram address [0x0, 0x2000000), because there is a hareware on board using it, I have to write data to this specific ram region and my hareware will read this region to work.
I have moved foc kernel address to 0x2000000, and also used Attach_io_mem_dataspace to reflect physical address [0x0, 0x2000000) in my driver, but I failed to drive my hareware. I guess maybe the data haven't been written to this ram region correctly. Is Attach_io_mem_dataspace suitable for this case? If NOT, how can I do ?
Genode depends on sigma0 to detect RAM regions. Sigma0 itself depends on bootstrap's information. So, I think you have to figure out how to configure bootstrap to exclude (or better to _not_ include) [0x0, 0x2000000) from RAM. Afterwards, Attached_io_mem_dataspace should work as expected. Do you have a serial log of bootstrap's boot messages?
Regards