From 4ec0cad51ffb0f8eb4de1af5659ccc0878dcbd94 Mon Sep 17 00:00:00 2001 From: Francis Rowe Date: Thu, 19 Mar 2015 00:59:15 -0400 Subject: docs/hcl/gm45_remove_me.html: add notes about flash write protect --- (limited to 'docs') diff --git a/docs/hcl/gm45_remove_me.html b/docs/hcl/gm45_remove_me.html index 0d12d63..618da51 100644 --- a/docs/hcl/gm45_remove_me.html +++ b/docs/hcl/gm45_remove_me.html @@ -117,6 +117,34 @@ for how to flash it.

+

+ Write-protecting the flash chip +

+

+ Look in resources/utilities/ich9deblob/src/descriptor/descript.c + for the following lines in the descriptorHostRegionsUnlocked function: +

+
+   descriptorStruct.masterAccessSection.flMstr1.fdRegionWriteAccess = 0x1;
+   descriptorStruct.masterAccessSection.flMstr1.biosRegionWriteAccess = 0x1;
+   descriptorStruct.masterAccessSection.flMstr1.meRegionWriteAccess = 0x1;
+   descriptorStruct.masterAccessSection.flMstr1.gbeRegionWriteAccess = 0x1;
+   descriptorStruct.masterAccessSection.flMstr1.pdRegionWriteAccess = 0x1;
+
+ +

+ Change them all the 0x0, then re-compile ich9gen. After you have done that, + follow the notes in #ich9gen to generate a new + descriptor+gbe image and insert that into your ROM image, then flash it. + The next time you boot, the flash chip will be ready-only in software + (hardware re-flashing will still work, which you will need for re-flashing + the chip after write-protecting it, to clear the write protection or + to flash yet another ROM image with write protection set in the descriptor). +

+

+ For external flashing guides, refer to ../install/index.html. +

+
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