On 05/10/2012 05:18 PM, aubin.rebil...@free.fr wrote: >> root=/dev/ram0 means that you are using an initrd, which has been >> deprecated for many years. > > I don't really have another option because the board does not support > U-BOOT (according to the manufacturer) and due to the specific > bootloader on the board I need an initrd : The bootloader only > initialises some hardware and loads the kernel image and the initrd > in memory before jumping on the kernel code. Then it uses the "linux > booting linux" technique to launch debian. I agree with you that it > is not the way of doing it today and i suspect the board manufacturer > to do so to sell a "fast booting board" because linux is booted in > less than 4 secs (of course for debian, it takes really more). They > actually made many things that seemed nice when i read the > description but when i wanted to develop with it I saw a lot of > really strange technique / behaviors (See the UART after for > example).
There is no difference that I know of from the bootloader side whether booting with an initrd or an initramfs. Anyway, the only difference is that initramfs wastes more memory, it is not what is causing the problem. Either using an initrd or an initramfs wastes boot time, which is usually a scarse resource on embedded systems. Whatever the bootloader, I do not see what prevents you from passing different parameters than "root=/dev/ram0" to the kernel, which would be enough to boot from another device. But all this is unimportant. > I will look into the OABI and EABI settings then. I will also set up > an NFS file system to mount debian from and see what is happening. > > Thank you Gilles for your reply. I will keep posting about my > progresses. The issue may simply well be that your timer code does not work. Could you post the code for your port? That is, the code you added to get it work with the I-pipe patch. Have you checked that linux timer is still ticking after Xenomai has been started? You can also try to boot with CONFIG_IPIPE but without CONFIG_XENOMAI. Note that in case you do not know it, there is a guide for porting the I-pipe patch on new ARM platforms: http://www.xenomai.org/index.php/I-pipe:ArmPorting -- Gilles. _______________________________________________ Xenomai-help mailing list Xenomai-help@gna.org https://mail.gna.org/listinfo/xenomai-help
