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authorFrancis Rowe <info@gluglug.org.uk>2014-12-25 16:25:49 (EST)
committer Francis Rowe <info@gluglug.org.uk>2014-12-25 16:25:49 (EST)
commita8b13d23f29a08026eaa308b8b09be7e9d1ff5a6 (patch)
tree0cdc767b9b44b94ca4fbec16bf88496bc4656dd4 /resources/utilities/ich9deblob/gbe/gbe.c
parent655ac91c5db8818c7cef7e9e44febaf36459d394 (diff)
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ich9deblob: moved src to src/, .o files to obj/
Diffstat (limited to 'resources/utilities/ich9deblob/gbe/gbe.c')
-rw-r--r--resources/utilities/ich9deblob/gbe/gbe.c124
1 files changed, 0 insertions, 124 deletions
diff --git a/resources/utilities/ich9deblob/gbe/gbe.c b/resources/utilities/ich9deblob/gbe/gbe.c
deleted file mode 100644
index 9eee828..0000000
--- a/resources/utilities/ich9deblob/gbe/gbe.c
+++ /dev/null
@@ -1,124 +0,0 @@
-/*
- * gbe/gbe.c
- * This file is part of the ich9deblob utility from the libreboot project
- *
- * Copyright (C) 2014 Steve Shenton <sgsit@libreboot.org>
- * Francis Rowe <info@gluglug.org.uk>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-/*
- * Provide gbe related functions.
- */
-
-/* structs describing the data from gbe region */
-#include "gbe.h"
-
-/*
- * ---------------------------------------------------------------------
- * Gbe functions:
- * ---------------------------------------------------------------------
- */
-
-/* Read a 16-bit unsigned int from a supplied region buffer */
-unsigned short gbeGetRegionWordFrom8kBuffer(int index, char* regionData)
-{
- return *((unsigned short*)(regionData + (index * 2)));
-}
-
-/*
- * gbe checksum calculation (algorithm based on datasheet)
- */
-unsigned short gbeGetChecksumFrom8kBuffer(char* regionData, unsigned short desiredValue, int byteOffset)
-{
- int i;
-
- /*
- * byteOffset defines the byte address where the gbe begins in the buffer "regionData".
- * However, this function works with 16-bit words. Shift the byte offset to the right for the word (16-bit) offset.
- */
- int wordOffset = byteOffset >> 1;
-
- unsigned short regionWord; /* store words here for adding to checksum */
- unsigned short checksum = 0; /* this gbe's checksum */
-
- for (i = 0; i < 0x3F; i++) {
- regionWord = gbeGetRegionWordFrom8kBuffer(i+wordOffset, regionData);
- checksum += regionWord;
- }
- checksum = desiredValue - checksum;
- return checksum;
-}
-
-/* checksum calculation for 4k gbe struct (algorithm based on datasheet) */
-unsigned short gbeGetChecksumFrom4kStruct(struct GBEREGIONRECORD_4K gbeStruct4k, unsigned short desiredValue)
-{
- char gbeBuffer4k[GBEREGIONSIZE_4K];
- memcpy(&gbeBuffer4k, &gbeStruct4k, GBEREGIONSIZE_4K);
- return gbeGetChecksumFrom8kBuffer(gbeBuffer4k, desiredValue, 0);
-}
-
-/* modify the gbe region extracted from a factory.rom dump */
-struct GBEREGIONRECORD_8K deblobbedGbeStructFromFactory(struct GBEREGIONRECORD_8K factoryGbeStruct8k)
-{
- /*
- * Correct the main gbe region. By default, the X200 (as shipped from Lenovo) comes
- * with a broken main gbe region, where the backup gbe region is used instead. Modify
- * it so that the main region is usable.
- */
-
- struct GBEREGIONRECORD_8K deblobbedGbeStruct8k;
- memcpy(&deblobbedGbeStruct8k, &factoryGbeStruct8k, GBEREGIONSIZE_8K);
-
- deblobbedGbeStruct8k.backup.checkSum = gbeGetChecksumFrom4kStruct(deblobbedGbeStruct8k.backup, GBECHECKSUMTOTAL);
- memcpy(&deblobbedGbeStruct8k.main, &deblobbedGbeStruct8k.backup, GBEREGIONSIZE_4K);
-
- return deblobbedGbeStruct8k;
-}
-
-/*
- * ---------------------------------------------------------------------
- * Debugging functions:
- * ---------------------------------------------------------------------
- */
-
-/*
- * show debugging info: show calculated (correct) gbe checksum and what
- * is actually stored, in a 4K gbe struct. Only for a single region.
- */
-void printGbeChecksumDataFromStruct4k(struct GBEREGIONRECORD_4K gbeStruct4k, char* romName, char* regionName)
-{
- printf(
- "%s Gbe (%s): calculated Gbe checksum: 0x%hx and actual GBe checksum: 0x%hx\n",
- romName,
- regionName,
- gbeGetChecksumFrom4kStruct(gbeStruct4k, GBECHECKSUMTOTAL),
- gbeStruct4k.checkSum
- );
-
- return;
-}
-
-/*
- * show debugging info: show calculated (correct) gbe checksum and what
- * is actually stored, in a 8K gbe struct. Do so for main and backup regions.
- */
-void printGbeChecksumDataFromStruct8k(struct GBEREGIONRECORD_8K gbeStruct8k, char* romName)
-{
- printGbeChecksumDataFromStruct4k(gbeStruct8k.main, romName, "main");
- printGbeChecksumDataFromStruct4k(gbeStruct8k.backup, romName, "backup");
-
- return;
-}