Hi Roel
I've seen similar behavior using a MV64560 and power PC processor using a Windriver ICE.
Basically I could not read the MV internal registers correctly when I did not plug in a bootrom (leaving empty socket). Was reading zeroes anywhere in memory.
Somehow putting in even an empty Flash device allowed me to initialize the processor correctly and read/write MV registers and burn the flash via ICE.
- Wim
Message: 5 Date: Sun, 1 Oct 2006 20:19:12 +0200 From: "Roel Loeffen" <roel.loeffen@pr...> Subject: [U-Boot-Users] MV64460 Burst reads from
BootCS
To: <u-boot-users@li...> Message-ID:
<7826EB01AD927140A1DCF898FE63325D0D91B1@Ex...>
Content-Type: text/plain; charset="iso-8859-1"
Hi all,
We discover some serious problems accessing flash
at BootCS
of the Marvell MV64460. It looks like burst reads
make the
whole bridge hang. >From inside U-Boot as well as
using only
the BDI2000 debugger.
Reading the flash with bursts enabled (which is
default),
makes it sometimes impossible to access any registers/dram/devices anymore, only zeros can be
read.
It also freezes the CPU somehow the debugger cannot
halt it
anymore with a normal halt (COP halt), it has to
use COP
freeze to take over control again.
I cannot say this problem does not occur accessing
other
spaces, so it can also be a problem at the PPC60x
bus.
Has anyone over excpirianced this before?
Thanks in advance!
Roel
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