The Bootloaded initializes the SDRAM, it sets the timings, refresh setting
etc.
Redboot turns on the Virtual Memory System (MMU), caching, and buffering.
The SerialBlaster can be compiled for different memory configurations (See the
code). If you have 64MB of memory there is not enough space to initialize it
in the 2KB resident EEPROM bootloader, without removing something else. You
may want to remove the SDRAM testing code to make space.
If you destroy redboot, the way to restore it is to:
- Boot using the SerialBlaster (set the board jumpers to serial boot)
- Have the SerialBlaster load from serial a special copy of RedBoot
in to memory.
(This special copy is one compiled with the SerialBlaster changes)
- Have RedBoot download a good TS RedBoot image from TFTP, or Serial
- Burn this Redboot image to flash
- Set the jumper to normal boot
- Power cycle the board
Restoring the EEPROM boot image is very similar.
-Curtis.
On January 1, 2007 03:28 pm, Doug Chapman wrote:
> In the process of experimenting I somehow managed to trash my
> redboot.img on the flash of my ts7260. I am able to get it back
> running again using serialblaster however the redboot image that comes
> with it doesn't appear to be correct for my system (but is enough to
> get it up and running again).
>
> I am attempting to get a 2.6.19 kernel running. I have it booting but
> I keep running into panics which I think may be related to how the
> memory is configured. Is that done by redboot or by the bootloader?
> (my bootloader image is OK).
>
> Is there a redboot.bin image available someplace for a TS-7260 w/64M
> RAM 32M flash?
>
> Also, my bootloader is version 1.06. Is this the latest? My 7260 was
> one of the first ones shipped (around a year ago) so if this was
> updated I would like to update this as well.
>
> thanks,
>
> - Doug
>
>
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