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have panda board flash ?

Rahul Tiwari
Prodigy 240 points

Hello,

can anyone say that  Pandaboard has nand support or not ? .

Is pandaboard have any flash memoy ?

How can i call uimage directly from x-loader means skip the u-boot.?

  • 0
    Expert 1780 points

    Hi Rahul.

    While the OMAP processor supports NAND flash through the GPMC interface, there is no NAND or NOR on the Pandaboard.

    You need to have both the primary bootloader (x-loader/MLO) as well as the secondary bootloader (u-boot) or some alternative like barebox.  There is not enough functionality in x-loader to go straight to Linux.  While it might be possible to hack x-loader to incorporate more functionality, you would be reinventing the wheel and fighting with keeping the resulting MLO small enough for the ROM to load.

    Regards,

        Steve

  • 0 in reply to Steve Schefter
    Prodigy 45 points

    hi ,we provide  clone panda board  which provide eMMC on board ,www.tianyeit.com

  • 0 in reply to Steve Schefter
    Prodigy 240 points

    hi.....

    can you say how i can i interface flash memory on board through gpmc interface?

    or is there any pee-requisties for that.

  • 0 in reply to Rahul Tiwari
    Expert 1780 points

    Hi Rahul.

    If you mean how to do the software, NAND on the GPMC interface is supported by the TI OMAP4 kernel at:

    git://dev.omapzoom.org/pub/scm/integration/kernel-ubuntu.git.

    If you mean how to do the hardware, this is covered in the OMAP4 TRMs.

    Regards,

        Steve

  • 0 in reply to Steve Schefter
    Prodigy 240 points

    Hi Steve,

    Thank you for reply me.

    As you say I interface NAND flash through GPMC. And also enable support in kernel but I don't get any switch to change bootmode, so in this side how to boot from nand, it's default from MMC.

    i know that for changing boot order i have to read SYSBOOT register. so can you say how can i read it.

    Regards,

    Rahul Tiwari

  • 0 in reply to Rahul Tiwari
    Expert 1780 points

    Hi Rahul.

    When you asked about how to interface NAND flash after it was noted that the PandaBoard had no NAND, I assumed you were talking about how to do it on your own custom board.

    Regards,

        Steve

  • 0 in reply to Steve Schefter
    Prodigy 240 points

    Hi Steve,

    I am talking about pandaboard not any custom board. There is a one register, is SYSBOOT register on board by which boot configuration is done. i want to ask that how can i read or write this register.

    if I boot from MMC, I have to place MLO, u-boot.bin and kernel image in MMC. The Same way if i want to boot from NAND then I have to write these three files in it. As I know, Commands for writing and erasing are available in u-boot. So for booting from NAND, should i have to boot first time from MMC and write in NAND  flash then again I have to boot. this will done from NAND.

    How can i know the address of NAND from where it will start.

  • 0 in reply to Rahul Tiwari
    Prodigy 240 points

    Can anyone tell me how can I use DMA to copy image from MMC to Ram to reduce boot time ?

    Currently I do following changes in board configuration fie "omap4_common.h"

    #define CONFIG_CMD_DMA
    #define CONFIG_DMA_COPY_OF_KERNEL 1

    But still I doesn't see the effect of this parameter in my boot time.

    Is MMC is a Flash type of Non-volatile storage?

    As i know the above parameter copy images from ROM/FLASH to RAM.