[openfirmware] [commit] r1853 - cpu/x86/pc/olpc/via
repository service
svn at openfirmware.info
Thu Jul 1 19:32:54 CEST 2010
Author: wmb
Date: Thu Jul 1 19:32:54 2010
New Revision: 1853
URL: http://tracker.coreboot.org/trac/openfirmware/changeset/1853
Log:
OLPC XO-1.5 - added commented-out code to early startup sequence
to clear memory before starting Forth. It was a test for a
page-fault-after-runin problem that was never fully diagnosed -
but it seems to have disappeared with a new system build.
(This message applies to the change to startmemtop.fth; the
previous instance of this message was incorrectly attached
to the initial checkin of startpcirestore.fth)
Modified:
cpu/x86/pc/olpc/via/startmemtop.fth
Modified: cpu/x86/pc/olpc/via/startmemtop.fth
==============================================================================
--- cpu/x86/pc/olpc/via/startmemtop.fth Thu Jul 1 19:31:17 2010 (r1852)
+++ cpu/x86/pc/olpc/via/startmemtop.fth Thu Jul 1 19:32:54 2010 (r1853)
@@ -19,3 +19,9 @@
bx mem-info-pa 4 + #) mov \ Top of memory
+\ bx di mov
+\ h# 800.0000 # di sub \ Clear the last 128 MB
+\ h# 800.0000 4 / # cx mov \ Longword count
+\ cld
+\ ax ax xor
+\ rep ax stos
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