On 09/01/2011 10:42 AM, Pali Rohár wrote:
Hello,
Hi Pali,
U-Boot patches which add support for Nokia RX-51 (aka N900) is here: http://al.robotfuzz.com/~al/maemo/u-boot/
It is quite difficult to review patches in this way, considering you have already changed something to adapt to the currect release. I suggest you post your modified patches to ML.
RX-51 has closed 2nd stage bootloader NOLO which can load kernel image from nand (or usb) to ram and boot it. NOLO also done all HW initializations. These U-Boot patches for RX-51 add support that builded U-Boot binary can be loaded and booted by NOLO. So U-Boot will be 3rd bootloader.
Patches are on top of revision bd2313078114c4b44c4a5ce149af43bcb7fc8854 and working fine. I rebased these patches on top of u-boot git master repository, but booting failed. No output on device. Using git bisect I found that problem appeared at revision
561142af20f1fd7b425d9425730014e656defb91 ARM: implement relocation for ARM V7 (OMAP)
If I defined CONFIG_SYS_ARM_WITHOUT_RELOC U-Boot working and booting fine up to revision a9aa3926295df759306258e5e24cace414f53b67
So problem is that relocation patches broke RX-51 support.
Well, it does mean that the RX51 was not adapted for the relocation...
You should take care that the initial stackpointer (check for CONFIG_SYS_INIT_SP_ADDR) is set to a a range into RAM (or internal RAM, if any) and it is not overwritten by other parts (where is your TEXT code ?).
Move all first initialization into board_early_init_f, if any.
Best regards, Stefano Babic