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authorFrancis Rowe <info@gluglug.org.uk>2014-12-29 17:58:28 (EST)
committer Francis Rowe <info@gluglug.org.uk>2014-12-29 17:58:28 (EST)
commit4806ec8129986d6a608c1deb10413b4ff17315d0 (patch)
treed7d2fc6c1db42e3911da5dd65404aa9e9e9e35cd /resources/utilities/ich9deblob
parent3a667ea44008dcb1958456d6c23ee978f0536eae (diff)
downloadlibreboot-4806ec8129986d6a608c1deb10413b4ff17315d0.zip
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ich9deblob/ich9gen: Host/CPU read/write access to all regions.
The ME is also disabled from reading/writing any regions (though the ME is already removed in libreboot).
Diffstat (limited to 'resources/utilities/ich9deblob')
-rw-r--r--resources/utilities/ich9deblob/src/descriptor/descriptor.c88
-rw-r--r--resources/utilities/ich9deblob/src/descriptor/descriptor.h2
-rw-r--r--resources/utilities/ich9deblob/src/ich9gen/mkdescriptor.c38
3 files changed, 81 insertions, 47 deletions
diff --git a/resources/utilities/ich9deblob/src/descriptor/descriptor.c b/resources/utilities/ich9deblob/src/descriptor/descriptor.c
index 899fba1..6b7a75b 100644
--- a/resources/utilities/ich9deblob/src/descriptor/descriptor.c
+++ b/resources/utilities/ich9deblob/src/descriptor/descriptor.c
@@ -32,12 +32,41 @@
* ---------------------------------------------------------------------
*/
-/*
- * Modify the flash descriptor, to remove the ME/AMT, and disable all other regions
- * Only Flash Descriptor, Gbe and BIOS regions (BIOS region fills factoryRomSize-12k) are left.
- * Tested on ThinkPad X200 and X200S. X200T and other GM45/GS45 targets may also work.
- * Also described in docs/hcl/x200_remove_me.html
- */
+/* Set the Host CPU / BIOS region to have read-write access on all regions */
+struct DESCRIPTORREGIONRECORD descriptorHostRegionsUnlocked(struct DESCRIPTORREGIONRECORD descriptorStruct)
+{
+ /* FLMSTR1 (Host CPU / BIOS) */
+ descriptorStruct.masterAccessSection.flMstr1.fdRegionReadAccess = 0x1;
+ descriptorStruct.masterAccessSection.flMstr1.biosRegionReadAccess = 0x1;
+ descriptorStruct.masterAccessSection.flMstr1.meRegionReadAccess = 0x1;
+ descriptorStruct.masterAccessSection.flMstr1.gbeRegionReadAccess = 0x1;
+ descriptorStruct.masterAccessSection.flMstr1.pdRegionReadAccess = 0x1;
+ 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;
+
+ return descriptorStruct;
+}
+
+/* Set the ME to have *no* read-write access on any region */
+struct DESCRIPTORREGIONRECORD descriptorMeRegionsForbidden(struct DESCRIPTORREGIONRECORD descriptorStruct)
+{
+ /* FLMSTR2 (ME) */
+ descriptorStruct.masterAccessSection.flMstr2.fdRegionReadAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.biosRegionReadAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.meRegionReadAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.gbeRegionReadAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.pdRegionReadAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.fdRegionWriteAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.biosRegionWriteAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.meRegionWriteAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.gbeRegionWriteAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.pdRegionWriteAccess = 0x0;
+
+ return descriptorStruct;
+}
/*
* Remove the ME/AMT blobs. This is needed for the ICH9 machines (eg X200)
@@ -97,12 +126,15 @@ struct DESCRIPTORREGIONRECORD deblobbedDescriptorStructFromFactory(struct DESCRI
deblobbedDescriptorStruct.regionSection.flReg1.LIMIT = (factoryRomSize >> FLREGIONBITSHIFT) - 1;
/*
- * Other things:
+ * Set region read/write access
* -------------
*/
- /* Make the flash descriptor region writeable from Host CPU / BIOS: */
- deblobbedDescriptorStruct.masterAccessSection.flMstr1.fdRegionWriteAccess = 1;
+ /* Host/CPU is allowed to read/write all regions. */
+ deblobbedDescriptorStruct = descriptorHostRegionsUnlocked(deblobbedDescriptorStruct);
+ /* The ME is disallowed read-write access to all regions
+ * (this is probably redundant, since the ME is already removed from libreboot) */
+ deblobbedDescriptorStruct = descriptorMeRegionsForbidden(deblobbedDescriptorStruct);
return deblobbedDescriptorStruct;
}
@@ -291,31 +323,31 @@ int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptor
fprintf(fp, " /* Master Access Section */\n");
fprintf(fp, " /* FLMSTR1 (Host CPU / BIOS) */\n");
fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.requesterId = 0x%04x;\n", descriptorStruct.masterAccessSection.flMstr1.requesterId);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.fdRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.fdRegionReadAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.biosRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.biosRegionReadAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.meRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.meRegionReadAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.gbeRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.gbeRegionReadAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.pdRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.pdRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.fdRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.fdRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.biosRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.biosRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.meRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.meRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.gbeRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.gbeRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.pdRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.pdRegionReadAccess);
fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.reserved1 = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.reserved1);
fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.fdRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.fdRegionWriteAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.biosRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.biosRegionWriteAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.meRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.meRegionWriteAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.gbeRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.gbeRegionWriteAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.pdRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.pdRegionWriteAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.biosRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.biosRegionWriteAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.meRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.meRegionWriteAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.gbeRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.gbeRegionWriteAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.pdRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr1.pdRegionWriteAccess);
fprintf(fp, " descriptorStruct.masterAccessSection.flMstr1.reserved2 = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr1.reserved2);
fprintf(fp, " /* FLMSTR2 (ME) */\n");
fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.requesterId = 0x%04x;\n", descriptorStruct.masterAccessSection.flMstr2.requesterId);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.fdRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.fdRegionReadAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.biosRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.biosRegionReadAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.meRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.meRegionReadAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.gbeRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.gbeRegionReadAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.pdRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.pdRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.fdRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.fdRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.biosRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.biosRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.meRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.meRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.gbeRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.gbeRegionReadAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.pdRegionReadAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.pdRegionReadAccess);
fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.reserved1 = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.reserved1);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.fdRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.fdRegionWriteAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.biosRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.biosRegionWriteAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.meRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.meRegionWriteAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.gbeRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.gbeRegionWriteAccess);
- fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.pdRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.pdRegionWriteAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.fdRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.fdRegionWriteAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.biosRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.biosRegionWriteAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.meRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.meRegionWriteAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.gbeRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.gbeRegionWriteAccess);
+ fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.pdRegionWriteAccess = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.masterAccessSection.flMstr2.pdRegionWriteAccess);
fprintf(fp, " descriptorStruct.masterAccessSection.flMstr2.reserved2 = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr2.reserved2);
fprintf(fp, " /* FLMSTR3 (Gbe) */\n");
fprintf(fp, " descriptorStruct.masterAccessSection.flMstr3.requesterId = 0x%04x;\n", descriptorStruct.masterAccessSection.flMstr3.requesterId);
diff --git a/resources/utilities/ich9deblob/src/descriptor/descriptor.h b/resources/utilities/ich9deblob/src/descriptor/descriptor.h
index 69d3358..04a5c93 100644
--- a/resources/utilities/ich9deblob/src/descriptor/descriptor.h
+++ b/resources/utilities/ich9deblob/src/descriptor/descriptor.h
@@ -302,6 +302,8 @@ struct DESCRIPTORREGIONRECORD
* ---------------------------------------------------------------------
*/
+struct DESCRIPTORREGIONRECORD descriptorHostRegionsUnlocked(struct DESCRIPTORREGIONRECORD descriptorStruct);
+struct DESCRIPTORREGIONRECORD descriptorMeRegionsForbidden(struct DESCRIPTORREGIONRECORD descriptorStruct);
struct DESCRIPTORREGIONRECORD deblobbedDescriptorStructFromFactory(struct DESCRIPTORREGIONRECORD factoryDescriptorStruct, unsigned int factoryRomSize);
int notCreatedHFileForDescriptorCFile(char* outFileName, char* cFileName);
int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptorStruct, char* outFileName, char* headerFileName);
diff --git a/resources/utilities/ich9deblob/src/ich9gen/mkdescriptor.c b/resources/utilities/ich9deblob/src/ich9gen/mkdescriptor.c
index c566afb..e166c55 100644
--- a/resources/utilities/ich9deblob/src/ich9gen/mkdescriptor.c
+++ b/resources/utilities/ich9deblob/src/ich9gen/mkdescriptor.c
@@ -107,31 +107,31 @@ struct DESCRIPTORREGIONRECORD generatedDescriptorStruct(unsigned int romSize)
/* Master Access Section */
/* FLMSTR1 (Host CPU / BIOS) */
descriptorStruct.masterAccessSection.flMstr1.requesterId = 0x0000;
- descriptorStruct.masterAccessSection.flMstr1.fdRegionReadAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr1.biosRegionReadAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr1.meRegionReadAccess = 0x0;
- descriptorStruct.masterAccessSection.flMstr1.gbeRegionReadAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr1.pdRegionReadAccess = 0x1;
+ descriptorStruct.masterAccessSection.flMstr1.fdRegionReadAccess = 0x1; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr1.biosRegionReadAccess = 0x1; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr1.meRegionReadAccess = 0x1; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr1.gbeRegionReadAccess = 0x1; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr1.pdRegionReadAccess = 0x1; /* see ../descriptor/descriptor.c */
descriptorStruct.masterAccessSection.flMstr1.reserved1 = 0x0;
descriptorStruct.masterAccessSection.flMstr1.fdRegionWriteAccess = 0x1; /* see ../descriptor/descriptor.c */
- descriptorStruct.masterAccessSection.flMstr1.biosRegionWriteAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr1.meRegionWriteAccess = 0x0;
- descriptorStruct.masterAccessSection.flMstr1.gbeRegionWriteAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr1.pdRegionWriteAccess = 0x1;
+ descriptorStruct.masterAccessSection.flMstr1.biosRegionWriteAccess = 0x1; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr1.meRegionWriteAccess = 0x1; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr1.gbeRegionWriteAccess = 0x1; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr1.pdRegionWriteAccess = 0x1; /* see ../descriptor/descriptor.c */
descriptorStruct.masterAccessSection.flMstr1.reserved2 = 0x0;
/* FLMSTR2 (ME) */
descriptorStruct.masterAccessSection.flMstr2.requesterId = 0x0000;
- descriptorStruct.masterAccessSection.flMstr2.fdRegionReadAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr2.biosRegionReadAccess = 0x0;
- descriptorStruct.masterAccessSection.flMstr2.meRegionReadAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr2.gbeRegionReadAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr2.pdRegionReadAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.fdRegionReadAccess = 0x0; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr2.biosRegionReadAccess = 0x0; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr2.meRegionReadAccess = 0x0; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr2.gbeRegionReadAccess = 0x0; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr2.pdRegionReadAccess = 0x0; /* see ../descriptor/descriptor.c */
descriptorStruct.masterAccessSection.flMstr2.reserved1 = 0x0;
- descriptorStruct.masterAccessSection.flMstr2.fdRegionWriteAccess = 0x0;
- descriptorStruct.masterAccessSection.flMstr2.biosRegionWriteAccess = 0x0;
- descriptorStruct.masterAccessSection.flMstr2.meRegionWriteAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr2.gbeRegionWriteAccess = 0x1;
- descriptorStruct.masterAccessSection.flMstr2.pdRegionWriteAccess = 0x0;
+ descriptorStruct.masterAccessSection.flMstr2.fdRegionWriteAccess = 0x0; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr2.biosRegionWriteAccess = 0x0; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr2.meRegionWriteAccess = 0x0; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr2.gbeRegionWriteAccess = 0x0; /* see ../descriptor/descriptor.c */
+ descriptorStruct.masterAccessSection.flMstr2.pdRegionWriteAccess = 0x0; /* see ../descriptor/descriptor.c */
descriptorStruct.masterAccessSection.flMstr2.reserved2 = 0x0;
/* FLMSTR3 (Gbe) */
descriptorStruct.masterAccessSection.flMstr3.requesterId = 0x0218;