diff options
| -rw-r--r-- | resources/utilities/ich9deblob/src/gbe/gbe.c | 19 | ||||
| -rw-r--r-- | resources/utilities/ich9deblob/src/gbe/gbe.h | 4 |
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 */ |