From: Andre Schwarz <andre.schwarz@matrix-vision.de>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] MPC83xx HRCW
Date: Fri, 28 Mar 2008 12:12:21 +0100 [thread overview]
Message-ID: <47ECD295.3090707@matrix-vision.de> (raw)
In "cpu/mpc83xx/start.S" there is a comment :
/*
* The Hard Reset Configuration Word (HRCW) table is in the first 64
* (0x40) bytes of flash. It has 8 bytes, but each byte is repeated 8
* times so the processor can fetch it out of flash whether the flash
* is 8, 16, 32, or 64 bits wide (hardware trickery).
*/
This does _not_ hold true for all configurations. Flash is simply one of
many options ...
Maybe it's true for the Freescale boards.
Other sources of the HRCW can be hard-coded strapping pins or an I2C EEPROM.
Why is there a need to define the HRCW ?
regards,
Andre Schwarz
Matrix Vision
MATRIX VISION GmbH, Talstra?e 16, DE-71570 Oppenweiler - Registergericht: Amtsgericht Stuttgart, HRB 271090
Gesch?ftsf?hrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner
next reply other threads:[~2008-03-28 11:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-28 11:12 Andre Schwarz [this message]
2008-03-28 11:55 ` [U-Boot-Users] MPC83xx HRCW Jerry Van Baren
[not found] ` <47ECE17A.9060906@matrix-vision.de>
2008-03-28 12:24 ` Jerry Van Baren
2008-03-28 12:34 ` Andre Schwarz
2008-03-28 16:11 ` David Hawkins
2008-03-28 21:10 ` André Schwarz
2008-03-28 21:53 ` David Hawkins
2008-03-28 22:13 ` André Schwarz
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