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

[mblack at mantaro.com]

Thanks for the input but not according to my S19 file or my flash
programmer... but thats not really what I am concerned with.  I understand
that the flash space isn't defined until OR0/BR0 are config'd.  I will deal
with HRCW later.  What I want is my code to live and run in the absolute
address 0xfff00000 region.  Has what I have pointed out done that or is
there more... was that the right way to do it?

Thanks,

Mitch

Original Message:
-----------------
From: VanBaren, Gerald (AGRE) Gerald.VanBaren at smiths-aerospace.com
Date: Fri, 9 Jul 2004 07:16:51 -0600
To: mblack at smtp3.smiths.com, at at smtp3.smiths.com, mantaro at smtp3.smiths.com,
dot at smtp3.smiths.com, com at smtp3.smiths.com,
u-boot-users at lists.sourceforge.net
Subject: RE: [U-Boot-Users] moving u-boot to upper address



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.

gvb


> -----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
> changed CFG_MONITOR_BASE to be TEXT_BASE
>

> 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
>

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