Carsten Valdemar Munk wrote: > . Or allow for flashing > the NAND/eMMC through USB.
Oh, right, if it can flash eMMC then the mmc code is in, so loading kernel from mmc is one NOLO bugzilla enhancement away ;-) > In this case, noone says you cannot include > a bootmenu in that zImage that selects a new root. Since I posted previous mail I have checked this and it looks like attaching some sort of initrd/initramfs is not available for arm architecture. It is very platform and bootloader dependent. https://linuxlink.timesys.com/forum/1021 http://www.denx.de/wiki/view/DULG/CombiningKernelAndRamdisk Also It is nontrivial to unzip kernel, modify command line and zip it again. It is implement at linker level piggy.S: ----- .section .piggydata,#alloc .globl input_data input_data: .incbin "arch/arm/boot/compressed/piggy.gz" .globl input_data_end input_data_end: ----- The input_data_end label is used in decompressor code (size=input_data_end-input_data) and whole image is zipped so different text yields different length. For out tablets it is still of course doable to modify decompressor code directly and change the size there. It is not very clean, though. Again, having kernel commandline stored inside config partition and NOLO using it instead of builtin command line would be ideal situation. > I doubt u-boot will be ported due to the lack of JTAG and that it's a > bit of risky business in terms of bricking your device trying to port > it. :) It should be possible to modify any current free bootloader to appear as zImage becoming 3rd stage bootloader. zImage is run with basic hardware already initialized and MMU still off so any bootloader code should be happy with this. Also there is this old LAB idea http://handhelds.org/moin/moin.cgi/HpIpaqH2200LAB Also kexec is another option. So basically we either need free bootloader that can show on-screen menu and load kernel etc. or use linux kernel and userspace code to do this (kexec, pivot_root). Frantisek _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
