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@smiths-aerospace.com Date: Fri, 9 Jul 2004 07:16:51 -0600 To: mblack@smtp3.smiths.com, at@smtp3.smiths.com, mantaro@smtp3.smiths.com, dot@smtp3.smiths.com, com@smtp3.smiths.com, u-boot-users@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@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net]On Behalf Of mblack@mantaro.com Sent: Friday, July 09, 2004 8:46 AM To: u-boot-users@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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