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-rw-r--r--resources/utilities/ich9deblob/src/gbe/gbe.c19
-rw-r--r--resources/utilities/ich9deblob/src/gbe/gbe.h4
2 files changed, 21 insertions, 2 deletions
diff --git a/resources/utilities/ich9deblob/src/gbe/gbe.c b/resources/utilities/ich9deblob/src/gbe/gbe.c
index 9eee828..b41b0db 100644
--- a/resources/utilities/ich9deblob/src/gbe/gbe.c
+++ b/resources/utilities/ich9deblob/src/gbe/gbe.c
@@ -76,12 +76,29 @@ struct GBEREGIONRECORD_8K deblobbedGbeStructFromFactory(struct GBEREGIONRECORD_8
/*
* 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.
+ * the backup as desired and then copy it to the main region.
*/
+
+ int i;
struct GBEREGIONRECORD_8K deblobbedGbeStruct8k;
memcpy(&deblobbedGbeStruct8k, &factoryGbeStruct8k, GBEREGIONSIZE_8K);
+ /*
+ * Word 40h to 53h of Gbe had this in the old deblobbed_descriptor.bin:
+ * 20 60 1F 00 02 00 13 00 00 80 1D 00 FF 00 16 00 DD CC 18 00 11 20 17 00 DD DD 18 00 12 20 17 00 00 80 1D 00 00 00 1F 00
+ *
+ * The same data was observed on others (created from other factory.rom dumps).
+ *
+ * The datasheets don't mention it for Intel 82576LM ethernet controller (what X200 uses) but later ones
+ * (for later chipsets) do. Maybe these are "reserved". Or maybe they are just junk.
+ *
+ * We really don't know. Blanking them with 0xFF seems harmless, though (nothing important seems broken).
+ */
+ for(i = 0; i < sizeof(deblobbedGbeStruct8k.backup.padding); i++) {
+ deblobbedGbeStruct8k.backup.padding[i] = 0xFF; /* FF is correct. In the struct, this is a char buffer. */
+ }
+
deblobbedGbeStruct8k.backup.checkSum = gbeGetChecksumFrom4kStruct(deblobbedGbeStruct8k.backup, GBECHECKSUMTOTAL);
memcpy(&deblobbedGbeStruct8k.main, &deblobbedGbeStruct8k.backup, GBEREGIONSIZE_4K);
diff --git a/resources/utilities/ich9deblob/src/gbe/gbe.h b/resources/utilities/ich9deblob/src/gbe/gbe.h
index 0a9b114..5d6348c 100644
--- a/resources/utilities/ich9deblob/src/gbe/gbe.h
+++ b/resources/utilities/ich9deblob/src/gbe/gbe.h
@@ -399,7 +399,9 @@ struct GBEREGIONRECORD_4K {
unsigned short reservedWords24to2Fh[12]; /* Words 24-2F: Reserved. These should all be 0x0000 according to datasheet and deblobbed_descriptor.bin */
struct GBE_PXE_SOFTWARE_REGION pxeSoftwareRegion; /* Words 30-3E: PXE Software Region */
unsigned short checkSum; /* when added to the sum of all words above, this should match GBECHECKSUMTOTAL */
- unsigned char padding1[3968];
+
+ /* set all bytes in here to 0xFF */
+ unsigned char padding[3968];
};
/* main and backup region in gbe */