[U-Boot-Users] moving u-boot to upper address

VanBaren, Gerald (AGRE) Gerald.VanBaren at smiths-aerospace.com
Fri Jul 9 15:16:51 CEST 2004

HRCW is ALWAYS at the START of your flash (assuming your flash is less than 16MB -- in that case, it is at 0xfe000000).  The HRCW will be at 0xfff00000 ONLY if your flash is exactly 1MB.

Strictly speaking, the HRCW does not have any address: the processor asserts CS0 and reads the HRCW from offsets 0..31 in whatever memory is enabled when CS0 is asserted.  It isn't until OR0/BR0 is configured (which is part of what is controlled by the HRCW) that you can talk about addresses.


> -----Original Message-----
> From: u-boot-users-admin at lists.sourceforge.net
> [mailto:u-boot-users-admin at lists.sourceforge.net]On Behalf Of
> mblack at mantaro.com
> Sent: Friday, July 09, 2004 8:46 AM
> To: u-boot-users at lists.sourceforge.net
> Subject: [U-Boot-Users] moving u-boot to upper address
> I want u-boot to live in the upper boot area 0xfff00000.
> So I have
> undef'd  _BOOT_LOW
> changed TEXT_BASE to be 0xfff00000
> I realize that the HRCW will now be placed at 0xfff00000 and
> the actual
> code will begin at 0xfff00100 - this is okay, I will handle the HRCW
> seperatly.
> I just want to know if there is anything wrong with what I
> have done or if
> there is anything else I need to do?  There are, as you know, many
> dependancies and I am afraid I might have missed one.
> I am dealing with custom hardware and I don't have a hardware
> debugger -
> lots of flash and crash so I am not exactly sure where my problem is.
> Thanks!
> Mitch
> --------------------------------------------------------------------
> mail2web - Check your email from the web at
> http://mail2web.com/ .
> -------------------------------------------------------
> This SF.Net email sponsored by Black Hat Briefings & Training.
> Attend Black Hat Briefings & Training, Las Vegas July 24-29 -
> digital self defense, top technical experts, no vendor pitches,
> unmatched networking opportunities. Visit www.blackhat.com
> _______________________________________________
> U-Boot-Users mailing list
> U-Boot-Users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/u-boot-users

The information contained in, or attached to, this e-mail, may contain confidential information and is intended solely for the use of the individual or entity to whom they are addressed and may be subject to legal privilege.  If you have received this e-mail in error you should notify the sender immediately by reply e-mail, delete the message from your system and notify your system manager.  Please do not copy it for any purpose, or disclose its contents to any other person.  The views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of the company.  The recipient should check this e-mail and any attachments for the presence of viruses.  The company accepts no liability for any damage caused, directly or indirectly, by any virus transmitted in this email.

More information about the U-Boot mailing list