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authorFrancis Rowe <info@gluglug.org.uk>2014-12-23 17:15:35 (EST)
committer Francis Rowe <info@gluglug.org.uk>2014-12-23 17:15:35 (EST)
commit1082934d042a5f8b397afc48a0b92edd8d779610 (patch)
treec5172f50bb812a94a72f383d3052fe981934bde4 /resources/utilities
parenta8605043c58cb0afd157d11431125b988f7af455 (diff)
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ich9deblob: define GBEREGIONSIZE_4K and use it
Diffstat (limited to 'resources/utilities')
-rw-r--r--resources/utilities/ich9deblob/gbe/gbe.h17
1 files changed, 12 insertions, 5 deletions
diff --git a/resources/utilities/ich9deblob/gbe/gbe.h b/resources/utilities/ich9deblob/gbe/gbe.h
index 3b25ddf..0e3f059 100644
--- a/resources/utilities/ich9deblob/gbe/gbe.h
+++ b/resources/utilities/ich9deblob/gbe/gbe.h
@@ -36,8 +36,15 @@
#include <stdio.h>
#include <string.h>
-/* Size of gbe region in bytes */
+/* Size of the full gbe region in bytes */
#define GBEREGIONSIZE_8K 0x2000
+/*
+ * Size of each sub-region in gbe.
+ * gbe contains two regions which
+ * can be identical: main and backup.
+ * These are each half the size of the full region
+ */
+#define GBEREGIONSIZE_4K 0x1000
/*
* These will have a modified descriptor+gbe based on what's in the factory.rom
@@ -99,7 +106,7 @@ unsigned short gbeGetChecksumFrom8kBuffer(char* regionData, unsigned short desir
* if isBackup is true, use 2nd gbe region ("backup" region)
* this function uses *word* not *byte* indexes, hence the bit shift.
*/
- if (isBackup) offset = 0x1000>>1;
+ if (isBackup) offset = GBEREGIONSIZE_4K>>1;
for (i = 0; i < 0x3F; i++) {
regionWord = gbeGetRegionWordFrom8kBuffer(i+offset, regionData);
@@ -112,8 +119,8 @@ unsigned short gbeGetChecksumFrom8kBuffer(char* regionData, unsigned short desir
/* checksum calculation for 4k gbe struct (algorithm based on datasheet) */
unsigned short gbeGetChecksumFrom4kStruct(struct GBEREGIONRECORD_4K gbeStruct4k, unsigned short desiredValue)
{
- char gbeBuffer4k[GBEREGIONSIZE_8K>>1];
- memcpy(&gbeBuffer4k, &gbeStruct4k, GBEREGIONSIZE_8K>>1);
+ char gbeBuffer4k[GBEREGIONSIZE_4K];
+ memcpy(&gbeBuffer4k, &gbeStruct4k, GBEREGIONSIZE_4K);
return gbeGetChecksumFrom8kBuffer(gbeBuffer4k, desiredValue, 0);
}
@@ -130,7 +137,7 @@ struct GBEREGIONRECORD_8K deblobbedGbeStructFromFactory(struct GBEREGIONRECORD_8
memcpy(&deblobbedGbeStruct8k, &factoryGbeStruct8k, GBEREGIONSIZE_8K);
deblobbedGbeStruct8k.backup.checkSum = gbeGetChecksumFrom4kStruct(deblobbedGbeStruct8k.backup, 0xBABA);
- memcpy(&deblobbedGbeStruct8k.main, &deblobbedGbeStruct8k.backup, GBEREGIONSIZE_8K>>1);
+ memcpy(&deblobbedGbeStruct8k.main, &deblobbedGbeStruct8k.backup, GBEREGIONSIZE_4K);
/*
* Debugging: