[coreboot] Fwd: reset vector issue
ron minnich
rminnich at gmail.com
Thu Nov 7 16:09:31 CET 2013
Very interesting note. We've never seen this before. Comments?
ron
---------- Forwarded message ----------
From: Naresh G. Solanki <naresh.solanki.2011 at gmail.com>
Date: Thu, Nov 7, 2013 at 6:00 AM
Subject: reset vector issue
To: rminnich at gmail.com
Dear sir,
I've worked with coreboot as hobby work.
I'd tested coreboot on Intel Z520P/US15WP chipset & found that it was
not working.
I reverse engineered original bios developed for that board & found that the
first instruction it was executing immediately after CPU reset was
wbinvd ( writeback & invalidate cache) instead of directly jump
instruction.
In file reset.inc
After entering 0x0f , 0x09 (wbinvd) immediately before jump ( 0xe9 )
I've found that coreboot started working in my board.
Please consider updating this in coreboot source.
Thank You,
Naresh G Solanki
India
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