[U-Boot-Users] MC5282Lite evaluation board - running from externalflash

[Erez Koelewyn]

Thank you. With this change, it boots from external flash.

On 10/16/07, Liew Tsi Chung-r5aahp <Tsi-chung.Liew at freescale.com> wrote:
> Erez,
>
>        There is a error if the TEXT_BASE set to 0xffe00000. Following
> is the fix for the problem.
>
> #if defined(CONFIG_R5200)
> .long   0x400
> #elif defined(CONFIG_M5282) && (TEXT_BASE == CFG_INT_FLASH_BASE)
> .long   _start - TEXT_BASE
> #else
> .long   _START
> #endif
>
>        /* if we come from a pre-loader we have no exception table and
>         * therefore no VBR to set
>         */
> #if !defined(CONFIG_MONITOR_IS_IN_RAM)
> #if defined(CONFIG_M5282) && (TEXT_BASE == CFG_INT_FLASH_BASE)
>        move.l  #CFG_INT_FLASH_BASE, %d0
>        movec   %d0, %VBR
> #else
>        move.l  #CFG_FLASH_BASE, %d0
>        movec   %d0, %VBR
> #endif                  /* CONFIG_M5282 */
> #endif
>
> Regards,
> TsiChung
>
> -----Original Message-----
> From: u-boot-users-bounces at lists.sourceforge.net
> [mailto:u-boot-users-bounces at lists.sourceforge.net] On Behalf Of Erez
> Koelewyn
> Sent: Tuesday, October 16, 2007 11:13 AM
> To: u-boot-users at lists.sourceforge.net
> Subject: [U-Boot-Users] MC5282Lite evaluation board - running from
> externalflash
>
> Hi,
>
> I think there is an issue when trying to run U-Boot from flash on this
> board.
> So far I was only able to boot U-Boot when I load in to the cpu's
> internal flash (I need to change the TEXT_BASE value to match that of
> the internal flash base).
>
> When I burn the U-Boot image to external flash and run it I can see that
> immediately after setting the chip selects in function cpu_init_f (in
> /cpu/mcf52x2/cpu_init.c under the #if defined(CONFIG_M5282) block),
> since the program counter still points to an address that is now
> suddenly in RAM (since we set the external flash base address to
> 0xffe00000) we cannot go on (there is no code there).
>
> Did anyone else see this problem? Was it addressed?
>
> Thanks & regards,
>
> Erez
>
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