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authorFrancis Rowe <info@gluglug.org.uk>2014-12-23 11:37:17 (EST)
committer Francis Rowe <info@gluglug.org.uk>2014-12-23 11:37:17 (EST)
commit7ffd20ca3fc1e9d436683b2e34c4e2e47fac2c7f (patch)
tree3ef3b66bab16d8677a66c387d6a0c48c49216949 /resources/utilities/ich9deblob/ich9deblob.c
parent61dd44646d515a42fe1145f9e7707b39e387a1b4 (diff)
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ich9deblob: move gbe functions to gbe/struct.h
Diffstat (limited to 'resources/utilities/ich9deblob/ich9deblob.c')
-rw-r--r--resources/utilities/ich9deblob/ich9deblob.c68
1 files changed, 0 insertions, 68 deletions
diff --git a/resources/utilities/ich9deblob/ich9deblob.c b/resources/utilities/ich9deblob/ich9deblob.c
index 2081bc4..e308312 100644
--- a/resources/utilities/ich9deblob/ich9deblob.c
+++ b/resources/utilities/ich9deblob/ich9deblob.c
@@ -46,11 +46,7 @@
#include "gbe/struct.h" // structs describing what's in the gbe region
#include "x86compatibility.c" // compatibility checks. this utility is not portable yet.
-unsigned short gbeGetChecksumFrom4kStruct(struct GBEREGIONRECORD_4K gbeStruct4k, unsigned short desiredValue);
-unsigned short gbeGetChecksumFrom8kBuffer(char* buffer, unsigned short desiredValue, char isBackup); // for GBe region (checksum calculation)
-unsigned short gbeGetRegionWordFrom8kBuffer(int i, char* buffer); // used for getting each word needed to calculate said checksum
struct DESCRIPTORREGIONRECORD deblobbedDescriptorStructFromFactory(struct DESCRIPTORREGIONRECORD factoryDescriptorStruct, unsigned int factoryRomSize);
-struct GBEREGIONRECORD_8K deblobbedGbeStructFromFactory(struct GBEREGIONRECORD_8K factoryGbeStruct8k);
int main(int argc, char *argv[])
{
@@ -292,67 +288,3 @@ struct DESCRIPTORREGIONRECORD deblobbedDescriptorStructFromFactory(struct DESCRI
return deblobbedDescriptorStruct;
}
-
-// ---------------------------------------------------------------------
-// Gbe functions
-// ---------------------------------------------------------------------
-
-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
- // the descriptor so that the main region is usable.
-
- struct GBEREGIONRECORD_8K deblobbedGbeStruct8k;
- memcpy(&deblobbedGbeStruct8k, &factoryGbeStruct8k, GBEREGIONSIZE);
-
- deblobbedGbeStruct8k.backup.checkSum = gbeGetChecksumFrom4kStruct(deblobbedGbeStruct8k.backup, 0xBABA);
- memcpy(&deblobbedGbeStruct8k.main, &deblobbedGbeStruct8k.backup, GBEREGIONSIZE>>1);
-
- // Debugging:
- // calculate the 0x3F'th 16-bit uint to make the desired final checksum for GBe
- // observed checksum matches (from X200 factory.rom dumps) on main: 0x3ABA 0x34BA 0x40BA. spec defined as 0xBABA.
- // X200 ships with a broken main gbe region by default (invalid checksum, and more)
- // The "backup" gbe regions on these machines are correct, though, and is what the machines default to
- // For libreboot's purpose, we can do much better than that by fixing the main one... below is only debugging
- printf("\nfactory Gbe (main): calculated Gbe checksum: 0x%hx and actual GBe checksum: 0x%hx\n", gbeGetChecksumFrom4kStruct(factoryGbeStruct8k.main, 0xBABA), factoryGbeStruct8k.main.checkSum);
- printf("factory Gbe (backup) calculated Gbe checksum: 0x%hx and actual GBe checksum: 0x%hx\n", gbeGetChecksumFrom4kStruct(factoryGbeStruct8k.backup, 0xBABA), factoryGbeStruct8k.backup.checkSum);
- printf("\ndeblobbed Gbe (main): calculated Gbe checksum: 0x%hx and actual GBe checksum: 0x%hx\n", gbeGetChecksumFrom4kStruct(deblobbedGbeStruct8k.main, 0xBABA), deblobbedGbeStruct8k.main.checkSum);
- printf("deblobbed Gbe (backup) calculated Gbe checksum: 0x%hx and actual GBe checksum: 0x%hx\n", gbeGetChecksumFrom4kStruct(deblobbedGbeStruct8k.backup, 0xBABA), deblobbedGbeStruct8k.backup.checkSum);
-
- return deblobbedGbeStruct8k;
-}
-
-// checksum calculation for 4k gbe struct (algorithm based on datasheet)
-unsigned short gbeGetChecksumFrom4kStruct(struct GBEREGIONRECORD_4K gbeStruct4k, unsigned short desiredValue)
-{
- char gbeBuffer4k[GBEREGIONSIZE>>1];
- memcpy(&gbeBuffer4k, &gbeStruct4k, GBEREGIONSIZE>>1);
- return gbeGetChecksumFrom8kBuffer(gbeBuffer4k, desiredValue, 0);
-}
-// checksum calculation for 8k gbe region (algorithm based on datasheet)
-// also works for 4k buffers, so long as isBackup remains false
-unsigned short gbeGetChecksumFrom8kBuffer(char* regionData, unsigned short desiredValue, char isBackup)
-{
- int i;
-
- unsigned short regionWord; // store words here for adding to checksum
- unsigned short checksum = 0; // this gbe's checksum
- unsigned short offset = 0; // in bytes, from the start of the gbe region.
-
- // if isBackup is true, use 2nd gbe region ("backup" region)
- if (isBackup) offset = 0x1000>>1; // this function uses *word* not *byte* indexes.
-
- for (i = 0; i < 0x3F; i++) {
- regionWord = gbeGetRegionWordFrom8kBuffer(i+offset, regionData);
- checksum += regionWord;
- }
- checksum = desiredValue - checksum;
- return checksum;
-}
-// Read a 16-bit unsigned int from a supplied region buffer
-unsigned short gbeGetRegionWordFrom8kBuffer(int index, char* regionData)
-{
- return *((unsigned short*)(regionData + (index * 2)));
-}
-