diff options
Diffstat (limited to 'resources/utilities/ich9deblob/src/gbe/gbe.c')
| -rw-r--r-- | resources/utilities/ich9deblob/src/gbe/gbe.c | 19 |
1 files changed, 18 insertions, 1 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); |