New board: ThinkPad R500 (experimental)

The ich9deblob and ich9gen utilities were modified, so that they
support reading and/or writing descriptor images where the GbE
region is not defined. These utilities were also re-factored
and tidied up a bit.

A quick was noticed during the course of this work, in that
Compenent 1 Density was being set to 8MiB constantly, even
on systems with 4MiB flash chips. Component 2 Density was
set statically to 2MiB. ich9gen now sets both to 4MiB or 8MiB,
depending on whether building the descriptor for a 4MiB or
8MiB ROM image.

There are still some ACPI bugs (see docs/hcl/r500.html), which
will have to be fixed upstream. TODO: get hw reg dumps from
a factory R500, and compare with the X200 or T400 dumps.

2 files changed, 176 insertions, 89 deletions

diff --git a/resources/utilities/ich9deblob/src/descriptor/descriptor.c b/resources/utilities/ich9deblob/src/descriptor/descriptor.c
index c627afa..5a89813 100644
--- a/resources/utilities/ich9deblob/src/descriptor/descriptor.c
+++ b/resources/utilities/ich9deblob/src/descriptor/descriptor.c
@@ -28,14 +28,13 @@
 
 /*
  * ---------------------------------------------------------------------
- * Descriptor functions
+ * Descriptor related functions
  * ---------------------------------------------------------------------
  */
 
 /* 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;
@@ -46,14 +45,13 @@ struct DESCRIPTORREGIONRECORD descriptorHostRegionsUnlocked(struct DESCRIPTORREG
    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;
@@ -64,92 +62,84 @@ struct DESCRIPTORREGIONRECORD descriptorMeRegionsForbidden(struct DESCRIPTORREGI
    descriptorStruct.masterAccessSection.flMstr2.meRegionWriteAccess = 0x0;
    descriptorStruct.masterAccessSection.flMstr2.gbeRegionWriteAccess = 0x0;
    descriptorStruct.masterAccessSection.flMstr2.pdRegionWriteAccess = 0x0;
-   
+
    return descriptorStruct;
 }
- 
-struct DESCRIPTORREGIONRECORD descriptorMePlatformRegionsRemoved(struct DESCRIPTORREGIONRECORD descriptorStruct)
+
+/* Disable (delete) the ME region */
+struct DESCRIPTORREGIONRECORD descriptorMeRegionRemoved(struct DESCRIPTORREGIONRECORD descriptorStruct)
 {
-	/* 
-	 * set number of regions from 4 -> 2 (0 based, so 4 means 5 and 2
-	 * means 3. We want 3 regions: descriptor, gbe and bios, in that order)
-	 */
-	descriptorStruct.flMaps.flMap0.NR = 2;
-	
-	/*
-	 * There are 5 regions. Since we set the number now to 3, that means
-	 * we need to disable 2 regions. ME and Platform will be disabled!
-	 * 
-	 * To disable a region, set the BASE to 1FFF. Shifted by FLREGIONBITSHIFT,
-	 * this puts the beginning of that region well outside the ROM image. 
-	 * Also set the LIMIT to 0.
-	 */
-	/* Disable (delete) the ME region */
 	descriptorStruct.regionSection.flReg2.BASE = 0x1FFF;
 	descriptorStruct.regionSection.flReg2.LIMIT = 0;
-	/* Disable (delete) the Platform region */
+
+	return descriptorStruct;
+}
+
+/* Disable (delete) the Platform region */
+struct DESCRIPTORREGIONRECORD descriptorPlatformRegionRemoved(struct DESCRIPTORREGIONRECORD descriptorStruct)
+{
 	descriptorStruct.regionSection.flReg4.BASE = 0x1FFF;
 	descriptorStruct.regionSection.flReg4.LIMIT = 0;
 	
 	return descriptorStruct;
 }
 
-struct DESCRIPTORREGIONRECORD descriptorDisableMeTpm(struct DESCRIPTORREGIONRECORD descriptorStruct)
+/* Disable the ME in ICHSTRAP0 and MCHSTRAP0 */
+struct DESCRIPTORREGIONRECORD descriptorDisableMe(struct DESCRIPTORREGIONRECORD descriptorStruct)
+{
+	descriptorStruct.ichStraps.ichStrap0.meDisable = 1;
+	descriptorStruct.mchStraps.mchStrap0.meDisable = 1;
+	
+	return descriptorStruct;
+}
+
+/* Disable the TPM in MCHSTRAP0 */
+struct DESCRIPTORREGIONRECORD descriptorDisableTpm(struct DESCRIPTORREGIONRECORD descriptorStruct)
 {
-	descriptorStruct.ichStraps.ichStrap0.meDisable = 1; /* Disable the ME in ICHSTRAP0 */
-	descriptorStruct.mchStraps.mchStrap0.meDisable = 1; /* Disable the ME in MCHSTRAP0 */
-	descriptorStruct.mchStraps.mchStrap0.tpmDisable = 1; /* Disable the TPM in MCHSTRAP0 */
+	descriptorStruct.mchStraps.mchStrap0.tpmDisable = 1;
 	
 	return descriptorStruct;
 }
 
+/* Relocate the Gbe region to begin at 4KiB (immediately after the flash descriptor) */
 struct DESCRIPTORREGIONRECORD descriptorMoveGbeToStart(struct DESCRIPTORREGIONRECORD descriptorStruct)
 {
-	/* Relocate the Gbe region to begin at 4KiB (immediately after the flash descriptor) */
 	descriptorStruct.regionSection.flReg3.BASE = DESCRIPTORREGIONSIZE >> FLREGIONBITSHIFT;
 	descriptorStruct.regionSection.flReg3.LIMIT = GBEREGIONSIZE_8K >> FLREGIONBITSHIFT;
 	
 	return descriptorStruct;
 }
 
+/* Disable (delete) the GbE region */
+struct DESCRIPTORREGIONRECORD descriptorGbeRegionRemoved(struct DESCRIPTORREGIONRECORD descriptorStruct)
+{
+	descriptorStruct.regionSection.flReg3.BASE = 0x1FFF;
+	descriptorStruct.regionSection.flReg3.LIMIT = 0;
+	
+	return descriptorStruct;
+}
+
+/* BIOS Region begin after descriptor+gbe at first 12KiB, fills the rest of the image */
 struct DESCRIPTORREGIONRECORD descriptorBiosRegionFillImageAfterGbe(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize)
 {
-	/* BIOS Region begin after descriptor+gbe at first 12KiB, fills the rest of the image */
 	descriptorStruct.regionSection.flReg1.BASE = (DESCRIPTORREGIONSIZE + GBEREGIONSIZE_8K) >> FLREGIONBITSHIFT;
 	descriptorStruct.regionSection.flReg1.LIMIT = (romSize >> FLREGIONBITSHIFT) - 1;
 	
 	return descriptorStruct;
 }
- 
-struct DESCRIPTORREGIONRECORD deblobbedDescriptorStructFromFactory(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize)
+
+/* BIOS Region begin after descriptor at first 4KiB, fills the rest of the image */
+struct DESCRIPTORREGIONRECORD descriptorBiosRegionFillImageAfterDescriptor(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize)
+{
+	descriptorStruct.regionSection.flReg1.BASE = DESCRIPTORREGIONSIZE >> FLREGIONBITSHIFT;
+	descriptorStruct.regionSection.flReg1.LIMIT = (romSize >> FLREGIONBITSHIFT) - 1;
+	
+	return descriptorStruct;
+}
+
+/* Set OEM string to "LIBERATE" */
+struct DESCRIPTORREGIONRECORD descriptorOemString(struct DESCRIPTORREGIONRECORD descriptorStruct)
 {
-	// Disable the ME/TPM and remove the ME/Platform regions:
-	descriptorStruct = descriptorMePlatformRegionsRemoved(descriptorStruct);
-	descriptorStruct = descriptorDisableMeTpm(descriptorStruct);
-
-	// Move GbE region to the start of the image (after the descriptor)
-	descriptorStruct = descriptorMoveGbeToStart(descriptorStruct);
-
-	/* BIOS region fills the remaining space */
-	descriptorStruct = descriptorBiosRegionFillImageAfterGbe(descriptorStruct, romSize);
-	 
-	/*
-	 * Set region read/write access
-	 * -------------
-	 */
-	 
-	/* Host/CPU is allowed to read/write all regions. */
-	descriptorStruct = descriptorHostRegionsUnlocked(descriptorStruct);
-	/* The ME is disallowed read-write access to all regions
-	 * (this is probably redundant, since the ME is already removed from libreboot) */
-	descriptorStruct = descriptorMeRegionsForbidden(descriptorStruct);
-	
-	/*
-	 * Miscellaneous
-	 * -------------
-	 */
-	
-	/* Set OEM string to "LIBERATE" */
 	descriptorStruct.oemSection.magicString[0] = 0x4C;
 	descriptorStruct.oemSection.magicString[1] = 0x49;
 	descriptorStruct.oemSection.magicString[2] = 0x42;
@@ -158,6 +148,100 @@ struct DESCRIPTORREGIONRECORD deblobbedDescriptorStructFromFactory(struct DESCRI
 	descriptorStruct.oemSection.magicString[5] = 0x41;
 	descriptorStruct.oemSection.magicString[6] = 0x54;
 	descriptorStruct.oemSection.magicString[7] = 0x45;
+
+	return descriptorStruct;
+} 
+
+/* Check whether a GbE region is defined by this descriptor.
+ * Not thorough, but should work in most cases */
+int descriptorDefinesGbeRegion(struct DESCRIPTORREGIONRECORD descriptorStruct)
+{
+	if (
+		(descriptorStruct.regionSection.flReg3.BASE == 0x1FFF || descriptorStruct.regionSection.flReg3.BASE == 0xFFF)
+		&&
+		(descriptorStruct.regionSection.flReg3.LIMIT == 0)
+	)
+		return 0; /* has no GbE region */
+	else if (
+		descriptorStruct.ichStraps.ichStrap0.integratedGbe == 0
+		||
+		descriptorStruct.ichStraps.ichStrap0.lanPhy == 0
+	)
+		return 0; /* has no GbE region */
+	else
+		return 1; /* has a GbE region */
+}
+
+/* Configure the BIOS and GbE regions, as required by libreboot.
+ * Enable or disable the GbE region, based on what's in the descriptor */
+struct DESCRIPTORREGIONRECORD librebootSetGbeBiosDescriptorRegions(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize)
+{
+	if (descriptorDefinesGbeRegion(descriptorStruct))
+	{
+		/* 
+		 * set number of regions from 4 -> 2 (0 based, so 4 means 5 and 2
+		 * means 3. We want 3 regions: descriptor, gbe and bios, in that order)
+		 */
+		descriptorStruct.flMaps.flMap0.NR = 2;
+		/* Move GbE region to the start of the image (after the descriptor) */
+		descriptorStruct = descriptorMoveGbeToStart(descriptorStruct);
+		/* BIOS region fills the remaining space */
+		descriptorStruct = descriptorBiosRegionFillImageAfterGbe(descriptorStruct, romSize);
+
+		/* GbE region means that an Intel NIC is to be present */
+		descriptorStruct.ichStraps.ichStrap0.integratedGbe = 0x1;
+		descriptorStruct.ichStraps.ichStrap0.lanPhy = 0x1;
+	}
+	else {
+		/* 
+		 * set number of regions from 4 -> 2 (0 based, so 4 means 5 and 1
+		 * means 2. We want 2 regions: descriptor and bios, in that order)
+		 */
+		descriptorStruct.flMaps.flMap0.NR = 1;
+		/* Disable the GbE region */
+		descriptorStruct = descriptorGbeRegionRemoved(descriptorStruct);
+		/* BIOS region fills the remaining space, after the descriptor */
+		descriptorStruct = descriptorBiosRegionFillImageAfterDescriptor(descriptorStruct, romSize);
+
+		/* No GbE region means that an onboard NIC is still used, but it's discrete (eg Broadcom) */
+		descriptorStruct.ichStraps.ichStrap0.integratedGbe = 0x0;
+		descriptorStruct.ichStraps.ichStrap0.lanPhy = 0x0;
+	}
+
+	return descriptorStruct;
+}
+
+uint8_t componentDensity(unsigned int romSizeInBytes)
+{
+	/* component density, see Component Section Record. page 848 in the datasheet */
+	switch (romSizeInBytes)
+	{
+		case ROMSIZE_512KB: return 0;
+		case ROMSIZE_1MB: return 1;
+		case ROMSIZE_2MB: return 2;
+		case ROMSIZE_4MB: return 3;
+		case ROMSIZE_8MB: return 4;
+		case ROMSIZE_16MB: return 5;
+		default: return 0x7; /* reserved value */
+	}
+}
+
+/* From a factory.rom image, create a modified descriptor region, suitable
+ * for use by the libreboot project */
+struct DESCRIPTORREGIONRECORD librebootDescriptorStructFromFactory(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize)
+{
+	/* Enable or disable the GbE region, from what's in the descriptor */
+	descriptorStruct = librebootSetGbeBiosDescriptorRegions(descriptorStruct, romSize);
+
+	/* Disable the ME/TPM and remove the ME/Platform regions: */
+	descriptorStruct = descriptorMeRegionRemoved(descriptorStruct);
+	/* Disable the ME/TPM and remove the ME/Platform regions: */
+	descriptorStruct = descriptorPlatformRegionRemoved(descriptorStruct);
+	
+	/* Disable the ME itself, so that it doesn't try to start when this descriptor is in use */
+	descriptorStruct = descriptorDisableMe(descriptorStruct);
+	/* Also disable the TPM, by default */
+	descriptorStruct = descriptorDisableTpm(descriptorStruct);
 	
 	return descriptorStruct;
 }
@@ -192,13 +276,7 @@ int notCreatedHFileForDescriptorCFile(char* outFileName, char* cFileName)
 	fprintf(fp, "#include <string.h>\n");
 	fprintf(fp, "#include \"../descriptor/descriptor.h\"\n\n");
 	
-	fprintf(fp, "/* ROM image sizes in bytes */\n");
-	fprintf(fp, "#define ROMSIZE_4MB 0x400000\n");
-	fprintf(fp, "#define ROMSIZE_8MB 0x800000\n\n");
-	
-	fprintf(fp, "struct DESCRIPTORREGIONRECORD generatedDescriptorStruct(unsigned int romSize);\n");
-	fprintf(fp, "struct DESCRIPTORREGIONRECORD generatedDescriptorStructRom4M();\n");
-	fprintf(fp, "struct DESCRIPTORREGIONRECORD generatedDescriptorStructRom8M();\n");
+	fprintf(fp, "struct DESCRIPTORREGIONRECORD generatedDescriptorStruct(unsigned int romSize, int hasGbe);\n");
 	
 	fprintf(fp, "#endif\n");
 	
@@ -234,7 +312,7 @@ int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptor
 	fprintf(fp, "/* Generate a 4KiB Descriptor struct, with default values. */\n");
 	fprintf(fp, "/* Read ../descriptor/descriptor.h for an explanation of the default values used here */\n\n");
 	
-	fprintf(fp, "struct DESCRIPTORREGIONRECORD generatedDescriptorStruct(unsigned int romSize)\n");
+	fprintf(fp, "struct DESCRIPTORREGIONRECORD generatedDescriptorStruct(unsigned int romSize, int hasGbe)\n");
 	fprintf(fp, "{\n");
 	fprintf(fp, "    int i;\n");
 	fprintf(fp, "    struct DESCRIPTORREGIONRECORD descriptorStruct;\n");
@@ -250,7 +328,8 @@ int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptor
 	fprintf(fp, "    descriptorStruct.flMaps.flMap0.NC = 0x%01x;\n", descriptorStruct.flMaps.flMap0.NC);
 	fprintf(fp, "    descriptorStruct.flMaps.flMap0.reserved1 = 0x%02x;\n", descriptorStruct.flMaps.flMap0.reserved1);
 	fprintf(fp, "    descriptorStruct.flMaps.flMap0.FRBA = 0x%02x;\n", descriptorStruct.flMaps.flMap0.FRBA);
-	fprintf(fp, "    descriptorStruct.flMaps.flMap0.NR = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.flMaps.flMap0.NR);
+	fprintf(fp, "    /* descriptorStruct.flMaps.flMap0.NR = 0x%01x; */ /* see ../descriptor/descriptor.c */\n", descriptorStruct.flMaps.flMap0.NR);
+	fprintf(fp, "    descriptorStruct.flMaps.flMap0.NR = hasGbe ? 0x2 : 0x1; /* see ../descriptor/descriptor.c */\n");
 	fprintf(fp, "    descriptorStruct.flMaps.flMap0.reserved2 = 0x%02x;\n", descriptorStruct.flMaps.flMap0.reserved2);
 	fprintf(fp, "    /* FLMAP1 */\n");
 	fprintf(fp, "    descriptorStruct.flMaps.flMap1.FMBA = 0x%02x;\n", descriptorStruct.flMaps.flMap1.FMBA);
@@ -266,8 +345,10 @@ int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptor
 	/* Component Section Record */
 	fprintf(fp, "    /* Component Section Record */\n");
 	fprintf(fp, "    /* FLCOMP */\n");
-	fprintf(fp, "    descriptorStruct.componentSection.flcomp.component1Density = 0x%01x;\n", descriptorStruct.componentSection.flcomp.component1Density);
-	fprintf(fp, "    descriptorStruct.componentSection.flcomp.component2Density = 0x%01x;\n", descriptorStruct.componentSection.flcomp.component2Density);
+	fprintf(fp, "    /* descriptorStruct.componentSection.flcomp.component1Density = 0x%01x; */\n", descriptorStruct.componentSection.flcomp.component1Density);
+	fprintf(fp, "    /* descriptorStruct.componentSection.flcomp.component2Density = 0x%01x; */\n", descriptorStruct.componentSection.flcomp.component2Density);
+	fprintf(fp, "    descriptorStruct.componentSection.flcomp.component1Density = componentDensity(romSize);\n");
+	fprintf(fp, "    descriptorStruct.componentSection.flcomp.component2Density = componentDensity(romSize);\n");
 	fprintf(fp, "    descriptorStruct.componentSection.flcomp.reserved1 = 0x%01x;\n", descriptorStruct.componentSection.flcomp.reserved1);
 	fprintf(fp, "    descriptorStruct.componentSection.flcomp.reserved2 = 0x%02x;\n", descriptorStruct.componentSection.flcomp.reserved2);
 	fprintf(fp, "    descriptorStruct.componentSection.flcomp.reserved3 = 0x%01x;\n", descriptorStruct.componentSection.flcomp.reserved3);
@@ -305,7 +386,7 @@ int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptor
 	fprintf(fp, "    descriptorStruct.regionSection.flReg0.reserved2 = 0x%01x;\n", descriptorStruct.regionSection.flReg0.reserved2);
 	fprintf(fp, "    /* FLREG1 (BIOS) */\n");
 	fprintf(fp, "    /* descriptorStruct.regionSection.flReg1.BASE = 0x%04x; */\n", descriptorStruct.regionSection.flReg1.BASE);
-	fprintf(fp, "    descriptorStruct.regionSection.flReg1.BASE = (DESCRIPTORREGIONSIZE + GBEREGIONSIZE_8K) >> FLREGIONBITSHIFT; /* see ../descriptor/descriptor.c */\n");
+	fprintf(fp, "    descriptorStruct.regionSection.flReg1.BASE = (DESCRIPTORREGIONSIZE + (hasGbe ? GBEREGIONSIZE_8K : 0)) >> FLREGIONBITSHIFT; /* see ../descriptor/descriptor.c */\n");
 	fprintf(fp, "    descriptorStruct.regionSection.flReg1.reserved1 = 0x%01x;\n", descriptorStruct.regionSection.flReg1.reserved1);
 	fprintf(fp, "    /* descriptorStruct.regionSection.flReg1.LIMIT = 0x%04x; */\n", descriptorStruct.regionSection.flReg1.LIMIT);
 	fprintf(fp, "    descriptorStruct.regionSection.flReg1.LIMIT = ((romSize >> FLREGIONBITSHIFT) - 1); /* see ../descriptor/descriptor.c */\n");
@@ -317,10 +398,10 @@ int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptor
 	fprintf(fp, "    descriptorStruct.regionSection.flReg2.reserved2 = 0x%01x;\n", descriptorStruct.regionSection.flReg2.reserved2);
 	fprintf(fp, "    /* FLREG3 (Gbe) */\n");
 	fprintf(fp, "    /* descriptorStruct.regionSection.flReg3.BASE = 0x%04x; */\n", descriptorStruct.regionSection.flReg3.BASE);
-	fprintf(fp, "    descriptorStruct.regionSection.flReg3.BASE = DESCRIPTORREGIONSIZE >> FLREGIONBITSHIFT; /* see ../descriptor/descriptor.c */\n");
+	fprintf(fp, "    descriptorStruct.regionSection.flReg3.BASE = hasGbe ? (DESCRIPTORREGIONSIZE >> FLREGIONBITSHIFT) : 0x1fff; /* see ../descriptor/descriptor.c */\n");
 	fprintf(fp, "    descriptorStruct.regionSection.flReg3.reserved1 = 0x%01x;\n", descriptorStruct.regionSection.flReg3.reserved1);
 	fprintf(fp, "    /* descriptorStruct.regionSection.flReg3.LIMIT = 0x%04x; */\n", descriptorStruct.regionSection.flReg3.LIMIT);
-	fprintf(fp, "    descriptorStruct.regionSection.flReg3.LIMIT = GBEREGIONSIZE_8K >> FLREGIONBITSHIFT; /* see ../descriptor/descriptor.c */\n");
+	fprintf(fp, "    descriptorStruct.regionSection.flReg3.LIMIT = hasGbe ? (GBEREGIONSIZE_8K >> FLREGIONBITSHIFT) : 0x0000; /* see ../descriptor/descriptor.c */\n");
 	fprintf(fp, "    descriptorStruct.regionSection.flReg3.reserved2 = 0x%01x;\n", descriptorStruct.regionSection.flReg3.reserved2);
 	fprintf(fp, "    /* FLREG4 (Platform) */\n");
 	fprintf(fp, "    descriptorStruct.regionSection.flReg4.BASE = 0x%04x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.regionSection.flReg4.BASE);
@@ -411,8 +492,8 @@ int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptor
 	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.bmcMode = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap0.bmcMode);
 	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.tripPointSelect = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap0.tripPointSelect);
 	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.reserved2 = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap0.reserved2);
-	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.integratedGbe = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap0.integratedGbe);
-	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.lanPhy = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap0.lanPhy);
+	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.integratedGbe = hasGbe ? 0x1 : 0x0;\n");
+	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.lanPhy = hasGbe ? 0x1 : 0x0;\n");
 	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.reserved3 = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap0.reserved3);
 	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.dmiRequesterId = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap0.dmiRequesterId);
 	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.smBus2Address = 0x%02x;\n", descriptorStruct.ichStraps.ichStrap0.smBus2Address);
@@ -520,16 +601,6 @@ int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptor
 	fprintf(fp, "    return descriptorStruct;\n");
 	fprintf(fp, "}\n\n");
 	
-	fprintf(fp, "struct DESCRIPTORREGIONRECORD generatedDescriptorStructRom4M()\n");
-	fprintf(fp, "{\n");
-	fprintf(fp, "    return generatedDescriptorStruct(ROMSIZE_4MB);\n");
-	fprintf(fp, "}\n\n");
-	
-	fprintf(fp, "struct DESCRIPTORREGIONRECORD generatedDescriptorStructRom8M()\n");
-	fprintf(fp, "{\n");
-	fprintf(fp, "    return generatedDescriptorStruct(ROMSIZE_8MB);\n");
-	fprintf(fp, "}\n\n");
-	
 	/* ------------------------------ */
 	
 	fclose(fp); /* Always close the file when done. */
diff --git a/resources/utilities/ich9deblob/src/descriptor/descriptor.h b/resources/utilities/ich9deblob/src/descriptor/descriptor.h
index 47a619c..64e381c 100644
--- a/resources/utilities/ich9deblob/src/descriptor/descriptor.h
+++ b/resources/utilities/ich9deblob/src/descriptor/descriptor.h
@@ -46,6 +46,14 @@
 /* size of the descriptor in bytes */
 #define DESCRIPTORREGIONSIZE 0x1000
 
+/* ROM image sizes in bytes */
+#define ROMSIZE_512KB 0x80000
+#define ROMSIZE_1MB 0x100000
+#define ROMSIZE_2MB 0x200000
+#define ROMSIZE_4MB 0x400000
+#define ROMSIZE_8MB 0x800000
+#define ROMSIZE_16MB 0x1000000
+
 /* 
  * Related to the flash descriptor
  * bits 12(0xC)-24(0x18) are represented for words found in the flash descriptor
@@ -305,11 +313,19 @@ struct DESCRIPTORREGIONRECORD
  
 struct DESCRIPTORREGIONRECORD descriptorHostRegionsUnlocked(struct DESCRIPTORREGIONRECORD descriptorStruct);
 struct DESCRIPTORREGIONRECORD descriptorMeRegionsForbidden(struct DESCRIPTORREGIONRECORD descriptorStruct);
-struct DESCRIPTORREGIONRECORD descriptorMePlatformRegionsRemoved(struct DESCRIPTORREGIONRECORD descriptorStruct);
-struct DESCRIPTORREGIONRECORD descriptorDisableMeTpm(struct DESCRIPTORREGIONRECORD descriptorStruct);
+struct DESCRIPTORREGIONRECORD descriptorMeRegionRemoved(struct DESCRIPTORREGIONRECORD descriptorStruct);
+struct DESCRIPTORREGIONRECORD descriptorPlatformRegionRemoved(struct DESCRIPTORREGIONRECORD descriptorStruct);
+struct DESCRIPTORREGIONRECORD descriptorDisableMe(struct DESCRIPTORREGIONRECORD descriptorStruct);
+struct DESCRIPTORREGIONRECORD descriptorDisableTpm(struct DESCRIPTORREGIONRECORD descriptorStruct);
 struct DESCRIPTORREGIONRECORD descriptorMoveGbeToStart(struct DESCRIPTORREGIONRECORD descriptorStruct);
+struct DESCRIPTORREGIONRECORD descriptorGbeRegionRemoved(struct DESCRIPTORREGIONRECORD descriptorStruct);
 struct DESCRIPTORREGIONRECORD descriptorBiosRegionFillImageAfterGbe(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize);
-struct DESCRIPTORREGIONRECORD deblobbedDescriptorStructFromFactory(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize);
+struct DESCRIPTORREGIONRECORD descriptorBiosRegionFillImageAfterDescriptor(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize);
+struct DESCRIPTORREGIONRECORD descriptorOemString(struct DESCRIPTORREGIONRECORD descriptorStruct);
+int descriptorDefinesGbeRegion(struct DESCRIPTORREGIONRECORD descriptorStruct);
+struct DESCRIPTORREGIONRECORD librebootSetGbeBiosDescriptorRegions(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize);
+uint8_t componentDensity(unsigned int romSizeInBytes);
+struct DESCRIPTORREGIONRECORD librebootDescriptorStructFromFactory(struct DESCRIPTORREGIONRECORD descriptorStruct, unsigned int romSize);
 int notCreatedHFileForDescriptorCFile(char* outFileName, char* cFileName);
 int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptorStruct, char* outFileName, char* headerFileName);
 void printDescriptorRegionLocations(struct DESCRIPTORREGIONRECORD descriptorStruct, char* romName);