code:
/*
 *  descriptor/descriptor.c
 *  This file is part of the ich9deblob utility from the libreboot project
 *
 *	 Copyright (C) 2014, 2015, 2019 Leah Rowe <info@minifree.org>
 *  Copyright (C) 2014 Steve Shenton <sgsit@libreboot.org>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Provide descriptor related functions.
 */

/* structs describing the data in descriptor region */
#include "descriptor.h"

/*
 * ---------------------------------------------------------------------
 * Descriptor related functions
 * ---------------------------------------------------------------------
 */

int validDescriptor(struct DESCRIPTORREGIONRECORD descriptorStruct) {
    if (descriptorStruct.flValSig.signature==0x0FF0A55A) return 1;
    return 0;
}

/* Set the Host CPU / BIOS region to have read-write access on all regions */
struct DESCRIPTORREGIONRECORD descriptorHostRegionsUnlocked(struct DESCRIPTORREGIONRECORD descriptorStruct)
{
   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 flash chip read-only when using flashrom -p internal */
struct DESCRIPTORREGIONRECORD descriptorHostRegionsReadOnly(struct DESCRIPTORREGIONRECORD descriptorStruct)
{
   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 = 0x0;
   descriptorStruct.masterAccessSection.flMstr1.biosRegionWriteAccess = 0x0;
   descriptorStruct.masterAccessSection.flMstr1.meRegionWriteAccess = 0x0;
   descriptorStruct.masterAccessSection.flMstr1.gbeRegionWriteAccess = 0x0;
   descriptorStruct.masterAccessSection.flMstr1.pdRegionWriteAccess = 0x0;

   return descriptorStruct;
}

/* Set the ME to have *no* read-write access on any region */
struct DESCRIPTORREGIONRECORD descriptorMeRegionsForbidden(struct DESCRIPTORREGIONRECORD descriptorStruct)
{
   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;
}

/* Disable (delete) the ME region */
struct DESCRIPTORREGIONRECORD descriptorMeRegionRemoved(struct DESCRIPTORREGIONRECORD descriptorStruct)
{
	descriptorStruct.regionSection.flReg2.BASE = 0x1FFF;
	descriptorStruct.regionSection.flReg2.LIMIT = 0;

	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;
}

/* 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.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)
{
	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)
{
	descriptorStruct.regionSection.flReg1.BASE = (DESCRIPTORREGIONSIZE + GBEREGIONSIZE_8K) >> FLREGIONBITSHIFT;
	descriptorStruct.regionSection.flReg1.LIMIT = (romSize >> FLREGIONBITSHIFT) - 1;

	return descriptorStruct;
}

/* 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)
{
	descriptorStruct.oemSection.magicString[0] = 0x4C;
	descriptorStruct.oemSection.magicString[1] = 0x49;
	descriptorStruct.oemSection.magicString[2] = 0x42;
	descriptorStruct.oemSection.magicString[3] = 0x45;
	descriptorStruct.oemSection.magicString[4] = 0x52;
	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;
}

/*
 * ---------------------------------------------------------------------
 * C code generator (self-writing code)
 * ---------------------------------------------------------------------
 */

/*
 * Generate a C (.h) header file for the C source file made by notCreatedCFileFromDescriptorStruct()
 *
 * Output it to a file.
 */
int notCreatedHFileForDescriptorCFile(char* outFileName, char* cFileName)
{
	remove(outFileName); /* Remove the old file before continuing */

	/* Open the file that will be written to */
	FILE* fp = fopen(outFileName, "w+");

	/* ------------------------------ */

	fprintf(fp, "/* %s: generated C code from ich9deblob */\n", outFileName);
	fprintf(fp, "/* .h header file for the descriptor-generating C code (%s) */\n\n", cFileName);

	fprintf(fp, "#ifndef ICH9GEN_MKDESCRIPTOR_H\n");
	fprintf(fp, "#define ICH9GEN_MKDESCRIPTOR_H\n\n");

	fprintf(fp, "#include <stdio.h>\n");
	fprintf(fp, "#include <string.h>\n");
	fprintf(fp, "#include \"../descriptor/descriptor.h\"\n\n");

	fprintf(fp, "struct DESCRIPTORREGIONRECORD generatedDescriptorStruct(unsigned int romSize, int hasGbe);\n");

	fprintf(fp, "#endif\n");

	/* ------------------------------ */

	fclose(fp); /* Always close the file when done. */

	return 0;
}

/*
 * Generate a C source file that initializes the same data from a given
 * 4KiB Descriptor data structure.
 *
 * Output it to a file.
 */
int notCreatedCFileFromDescriptorStruct(struct DESCRIPTORREGIONRECORD descriptorStruct, char* outFileName, char* headerFileName)
{
	int i, j;

	remove(outFileName); /* Remove the old file before continuing */

	/* Open the file that will be written to */
	FILE* fp = fopen(outFileName, "w+");

	/* ------------------------------ */

	fprintf(fp, "/* %s: generated C code from ich9deblob */\n", outFileName);
	fprintf(fp, "/* .c source file for the descriptor-generating C code */\n\n");

	fprintf(fp, "#include \"%s\"\n\n", headerFileName);

	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, int hasGbe)\n");
	fprintf(fp, "{\n");
	fprintf(fp, "    int i;\n");
	fprintf(fp, "    struct DESCRIPTORREGIONRECORD descriptorStruct;\n");
	fprintf(fp, "\n");
	/* Flash Valid Signature Register */
	fprintf(fp, "    /* Flash Valid Signature Register */\n");
	fprintf(fp, "    descriptorStruct.flValSig.signature = 0x%08x;\n", descriptorStruct.flValSig.signature);
	fprintf(fp, "\n");
	/* Flash Map Registers */
	fprintf(fp, "    /* Flash Map Registers */\n");
	fprintf(fp, "    /* FLMAP0 */\n");
	fprintf(fp, "    descriptorStruct.flMaps.flMap0.FCBA = 0x%02x;\n", descriptorStruct.flMaps.flMap0.FCBA);
	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 = 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);
	fprintf(fp, "    descriptorStruct.flMaps.flMap1.NM = 0x%01x;\n", descriptorStruct.flMaps.flMap1.NM);
	fprintf(fp, "    descriptorStruct.flMaps.flMap1.reserved = 0x%02x;\n", descriptorStruct.flMaps.flMap1.reserved);
	fprintf(fp, "    descriptorStruct.flMaps.flMap1.FISBA = 0x%02x;\n", descriptorStruct.flMaps.flMap1.FISBA);
	fprintf(fp, "    descriptorStruct.flMaps.flMap1.ISL = 0x%02x;\n", descriptorStruct.flMaps.flMap1.ISL);
	fprintf(fp, "    /* FLMAP2 */\n");
	fprintf(fp, "    descriptorStruct.flMaps.flMap2.FMSBA = 0x%02x;\n", descriptorStruct.flMaps.flMap2.FMSBA);
	fprintf(fp, "    descriptorStruct.flMaps.flMap2.MSL = 0x%02x;\n", descriptorStruct.flMaps.flMap2.MSL);
	fprintf(fp, "    descriptorStruct.flMaps.flMap2.reserved = 0x%04x;\n", descriptorStruct.flMaps.flMap2.reserved);
	fprintf(fp, "\n");
	/* 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 = 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);
	fprintf(fp, "    descriptorStruct.componentSection.flcomp.readClockFrequency = 0x%01x;\n", descriptorStruct.componentSection.flcomp.readClockFrequency);
	fprintf(fp, "    descriptorStruct.componentSection.flcomp.fastReadSupport = 0x%01x;\n", descriptorStruct.componentSection.flcomp.fastReadSupport);
	fprintf(fp, "    descriptorStruct.componentSection.flcomp.fastreadClockFrequency = 0x%01x;\n", descriptorStruct.componentSection.flcomp.fastreadClockFrequency);
	fprintf(fp, "    descriptorStruct.componentSection.flcomp.writeEraseClockFrequency = 0x%01x;\n", descriptorStruct.componentSection.flcomp.writeEraseClockFrequency);
	fprintf(fp, "    descriptorStruct.componentSection.flcomp.readStatusClockFrequency = 0x%01x;\n", descriptorStruct.componentSection.flcomp.readStatusClockFrequency);
	fprintf(fp, "    descriptorStruct.componentSection.flcomp.reserved4 = 0x%01x;\n", descriptorStruct.componentSection.flcomp.reserved4);
	fprintf(fp, "    /* FLILL */\n");
	fprintf(fp, "    descriptorStruct.componentSection.flill = 0x%08x;\n", descriptorStruct.componentSection.flill);
	fprintf(fp, "    /* FLPB */\n");
	fprintf(fp, "    descriptorStruct.componentSection.flpb = 0x%08x;\n", descriptorStruct.componentSection.flpb);
	fprintf(fp, "    /* Padding */\n");
	for (i = 0; i < 36; i++) {
		if (descriptorStruct.componentSection.padding[i] != 0xFF) {
			for (j = 0; j < 36; j++) {
				fprintf(fp, "    descriptorStruct.componentSection.padding[%d] = 0x%02x;\n", j, descriptorStruct.componentSection.padding[j]);
			}
			break;
		} else if (i == 35) {
			fprintf(fp, "    for (i = 0; i < 36; i++) {\n");
			fprintf(fp, "        descriptorStruct.componentSection.padding[i] = 0xFF;\n");
			fprintf(fp, "    }\n");
			break;
		}
	}
	fprintf(fp, "\n");
	/* Flash Descriptor Region Section */
	fprintf(fp, "    /* Flash Descriptor Region Section */\n");
	fprintf(fp, "    /* FLREG0 (Descriptor) */\n");
	fprintf(fp, "    descriptorStruct.regionSection.flReg0.BASE = 0x%04x;\n", descriptorStruct.regionSection.flReg0.BASE);
	fprintf(fp, "    descriptorStruct.regionSection.flReg0.reserved1 = 0x%01x;\n", descriptorStruct.regionSection.flReg0.reserved1);
	fprintf(fp, "    descriptorStruct.regionSection.flReg0.LIMIT = 0x%04x;\n", descriptorStruct.regionSection.flReg0.LIMIT);
	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 + (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");
	fprintf(fp, "    descriptorStruct.regionSection.flReg1.reserved2 = 0x%01x;\n", descriptorStruct.regionSection.flReg1.reserved2);
	fprintf(fp, "    /* FLREG2 (ME) */\n");
	fprintf(fp, "    descriptorStruct.regionSection.flReg2.BASE = 0x%04x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.regionSection.flReg2.BASE);
	fprintf(fp, "    descriptorStruct.regionSection.flReg2.reserved1 = 0x%01x;\n", descriptorStruct.regionSection.flReg2.reserved1);
	fprintf(fp, "    descriptorStruct.regionSection.flReg2.LIMIT = 0x%04x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.regionSection.flReg2.LIMIT);
	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 = 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 = 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);
	fprintf(fp, "    descriptorStruct.regionSection.flReg4.reserved1 = 0x%01x;\n", descriptorStruct.regionSection.flReg4.reserved1);
	fprintf(fp, "    descriptorStruct.regionSection.flReg4.LIMIT = 0x%04x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.regionSection.flReg4.LIMIT);
	fprintf(fp, "    descriptorStruct.regionSection.flReg4.reserved2 = 0x%01x;\n", descriptorStruct.regionSection.flReg4.reserved2);
	fprintf(fp, "    /* Padding */\n");
	for (i = 0; i < 12; i++) {
		if (descriptorStruct.regionSection.padding[i] != 0xFF) {
			for (j = 0; j < 12; j++) {
				fprintf(fp, "    descriptorStruct.regionSection.padding[%d] = 0x%02x;\n", j, descriptorStruct.regionSection.padding[j]);
			}
			break;
		} else if (i == 11) {
			fprintf(fp, "    for (i = 0; i < 12; i++) {\n");
			fprintf(fp, "        descriptorStruct.regionSection.padding[i] = 0xFF;\n");
			fprintf(fp, "    }\n");
			break;
		}
	}
	fprintf(fp, "\n");
	/* Master Access Section */
	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; /* 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; /* 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; /* 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; /* 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);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.fdRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.fdRegionReadAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.biosRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.biosRegionReadAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.meRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.meRegionReadAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.gbeRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.gbeRegionReadAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.pdRegionReadAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.pdRegionReadAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.reserved1 = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.reserved1);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.fdRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.fdRegionWriteAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.biosRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.biosRegionWriteAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.meRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.meRegionWriteAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.gbeRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.gbeRegionWriteAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.pdRegionWriteAccess = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.pdRegionWriteAccess);
	fprintf(fp, "    descriptorStruct.masterAccessSection.flMstr3.reserved2 = 0x%01x;\n", descriptorStruct.masterAccessSection.flMstr3.reserved2);
	fprintf(fp, "    /* Padding */\n");
	for (i = 0; i < 148; i++) {
		if (descriptorStruct.masterAccessSection.padding[i] != 0xFF) {
			for (j = 0; j < 148; j++) {
				fprintf(fp, "    descriptorStruct.masterAccessSection.padding[%d] = 0x%02x;\n", j, descriptorStruct.masterAccessSection.padding[j]);
			}
			break;
		} else if (i == 147) {
			fprintf(fp, "    for (i = 0; i < 148; i++) {\n");
			fprintf(fp, "        descriptorStruct.masterAccessSection.padding[i] = 0xFF;\n");
			fprintf(fp, "    }\n");
			break;
		}
	}
	fprintf(fp, "\n");
	/* ICH straps */
	fprintf(fp, "    /* ICH straps */\n");
	fprintf(fp, "    /* ICHSTRAP0 */\n");
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.meDisable = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.ichStraps.ichStrap0.meDisable);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.reserved1 = 0x%02x;\n", descriptorStruct.ichStraps.ichStrap0.reserved1);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.tcoMode = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap0.tcoMode);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap0.smBusAddress = 0x%02x;\n", descriptorStruct.ichStraps.ichStrap0.smBusAddress);
	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 = 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);
	fprintf(fp, "    /* ICHSTRAP1 */\n");
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap1.northMlink = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap1.northMlink);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap1.southMlink = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap1.southMlink);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap1.meSmbus = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap1.meSmbus);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap1.sstDynamic = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap1.sstDynamic);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap1.reserved1 = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap1.reserved1);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap1.northMlink2 = 0x%01x;\n", descriptorStruct.ichStraps.ichStrap1.northMlink2);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap1.reserved2 = 0x%02x;\n", descriptorStruct.ichStraps.ichStrap1.reserved2);
	fprintf(fp, "    descriptorStruct.ichStraps.ichStrap1.reserved3 = 0x%04x;\n", descriptorStruct.ichStraps.ichStrap1.reserved3);
	fprintf(fp, "    /* Padding */\n");
	for (i = 0; i < 248; i++) {
		if (descriptorStruct.ichStraps.padding[i] != 0xFF) {
			for (j = 0; j < 248; j++) {
				fprintf(fp, "    descriptorStruct.ichStraps.padding[%d] = 0x%02x;\n", j, descriptorStruct.ichStraps.padding[j]);
			}
			break;
		} else if (i == 247) {
			fprintf(fp, "    for (i = 0; i < 248; i++) {\n");
			fprintf(fp, "        descriptorStruct.ichStraps.padding[i] = 0xFF;\n");
			fprintf(fp, "    }\n");
			break;
		}
	}
	fprintf(fp, "\n");
	/* MCH straps */
	fprintf(fp, "    /* MCH straps */\n");
	fprintf(fp, "    /* MCHSTRAP0 */\n");
	fprintf(fp, "    descriptorStruct.mchStraps.mchStrap0.meDisable = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.mchStraps.mchStrap0.meDisable);
	fprintf(fp, "    descriptorStruct.mchStraps.mchStrap0.meBootFromFlash = 0x%01x;\n", descriptorStruct.mchStraps.mchStrap0.meBootFromFlash);
	fprintf(fp, "    descriptorStruct.mchStraps.mchStrap0.tpmDisable = 0x%01x; /* see ../descriptor/descriptor.c */\n", descriptorStruct.mchStraps.mchStrap0.tpmDisable);
	fprintf(fp, "    descriptorStruct.mchStraps.mchStrap0.reserved1 = 0x%01x;\n", descriptorStruct.mchStraps.mchStrap0.reserved1);
	fprintf(fp, "    descriptorStruct.mchStraps.mchStrap0.spiFingerprint = 0x%01x;\n", descriptorStruct.mchStraps.mchStrap0.spiFingerprint);
	fprintf(fp, "    descriptorStruct.mchStraps.mchStrap0.meAlternateDisable = 0x%01x;\n", descriptorStruct.mchStraps.mchStrap0.meAlternateDisable);
	fprintf(fp, "    descriptorStruct.mchStraps.mchStrap0.reserved2 = 0x%02x;\n", descriptorStruct.mchStraps.mchStrap0.reserved2);
	fprintf(fp, "    descriptorStruct.mchStraps.mchStrap0.reserved3 = 0x%04x;\n", descriptorStruct.mchStraps.mchStrap0.reserved3);
	fprintf(fp, "    /* Padding */\n");
	for (i = 0; i < 3292; i++) {
		if (descriptorStruct.mchStraps.padding[i] != 0xFF) {
			for (j = 0; j < 3292; j++) {
				fprintf(fp, "    descriptorStruct.mchStraps.padding[%d] = 0x%02x;\n", j, descriptorStruct.mchStraps.padding[j]);
			}
			break;
		} else if (i == 3291) {
			fprintf(fp, "    for (i = 0; i < 3292; i++) {\n");
			fprintf(fp, "        descriptorStruct.mchStraps.padding[i] = 0xFF;\n");
			fprintf(fp, "    }\n");
			break;
		}
	}
	fprintf(fp, "\n");
	/* ME VSCC Table */
	fprintf(fp, "    /* ME VSCC Table */\n");
	fprintf(fp, "    descriptorStruct.meVsccTable.jid0 = 0x%08x;\n", descriptorStruct.meVsccTable.jid0);
	fprintf(fp, "    descriptorStruct.meVsccTable.vscc0 = 0x%08x;\n", descriptorStruct.meVsccTable.vscc0);
	fprintf(fp, "    descriptorStruct.meVsccTable.jid1 = 0x%08x;\n", descriptorStruct.meVsccTable.jid1);
	fprintf(fp, "    descriptorStruct.meVsccTable.vscc1 = 0x%08x;\n", descriptorStruct.meVsccTable.vscc1);
	fprintf(fp, "    descriptorStruct.meVsccTable.jid2 = 0x%08x;\n", descriptorStruct.meVsccTable.jid2);
	fprintf(fp, "    descriptorStruct.meVsccTable.vscc2 = 0x%08x;\n", descriptorStruct.meVsccTable.vscc2);
	fprintf(fp, "    /* Padding */\n");
	for (i = 0; i < 4; i++) {
		if (descriptorStruct.meVsccTable.padding[i] != 0xFF) {
			for (j = 0; j < 4; j++) {
				fprintf(fp, "    descriptorStruct.meVsccTable.padding[%d] = 0x%02x;\n", j, descriptorStruct.meVsccTable.padding[j]);
			}
			break;
		} else if (i == 3) {
			fprintf(fp, "    for (i = 0; i < 4; i++) {\n");
			fprintf(fp, "        descriptorStruct.meVsccTable.padding[i] = 0xFF;\n");
			fprintf(fp, "    }\n");
			break;
		}
	}
	fprintf(fp, "\n");
	/* Descriptor Map 2 Record */
	fprintf(fp, "    /* Descriptor Map 2 Record */\n");
	fprintf(fp, "    descriptorStruct.descriptor2Map.meVsccTableBaseAddress = 0x%02x;\n", descriptorStruct.descriptor2Map.meVsccTableBaseAddress);
	fprintf(fp, "    descriptorStruct.descriptor2Map.meVsccTableLength = 0x%02x;\n", descriptorStruct.descriptor2Map.meVsccTableLength);
	fprintf(fp, "    descriptorStruct.descriptor2Map.reserved = 0x%04x;\n", descriptorStruct.descriptor2Map.reserved);
	fprintf(fp, "\n");
	/* OEM section */
	fprintf(fp, "    /* OEM section */\n");
	fprintf(fp, "    /* see ../descriptor/descriptor.c */\n");
	fprintf(fp, "    /* Magic String (ascii characters) */\n");
	for(i = 0; i < 8; i++) {
		fprintf(fp, "    descriptorStruct.oemSection.magicString[%d] = 0x%02x;\n", i, descriptorStruct.oemSection.magicString[i]);
	}
	fprintf(fp, "    /* Padding */\n");
	for (i = 0; i < 248; i++) {
		if (descriptorStruct.oemSection.padding[i] != 0xFF) {
			for (j = 0; j < 248; j++) {
				fprintf(fp, "    descriptorStruct.oemSection.padding[%d] = 0x%02x;\n", j, descriptorStruct.oemSection.padding[j]);
			}
			break;
		} else if (i == 247) {
			fprintf(fp, "    for (i = 0; i < 248; i++) {\n");
			fprintf(fp, "        descriptorStruct.oemSection.padding[i] = 0xFF;\n");
			fprintf(fp, "    }\n");
			break;
		}
	}
	fprintf(fp, "\n");
	fprintf(fp, "    return descriptorStruct;\n");
	fprintf(fp, "}\n\n");

	/* ------------------------------ */

	fclose(fp); /* Always close the file when done. */

	return 0;
}

/*
 * ---------------------------------------------------------------------
 * Debugging functions:
 * ---------------------------------------------------------------------
 */

/*
 * show debugging info: descriptor region boundaries, in a 4KB struct.
 */
void printDescriptorRegionLocations(struct DESCRIPTORREGIONRECORD descriptorStruct, char* romName)
{
	printf("\n");

	/* Descriptor region */
	printf(
		"%s: Descriptor start block: %08x ; Descriptor end block: %08x\n",
		romName,
		descriptorStruct.regionSection.flReg0.BASE << FLREGIONBITSHIFT,
		descriptorStruct.regionSection.flReg0.LIMIT << FLREGIONBITSHIFT
	);

	/* BIOS region */
	printf(
		"%s: BIOS start block: %08x ; BIOS end block: %08x\n",
		romName,
		descriptorStruct.regionSection.flReg1.BASE << FLREGIONBITSHIFT,
		descriptorStruct.regionSection.flReg1.LIMIT << FLREGIONBITSHIFT
	);

	/* ME region */
	printf(
		"%s: ME start block: %08x ; ME end block: %08x\n",
		romName,
		descriptorStruct.regionSection.flReg2.BASE << FLREGIONBITSHIFT,
		descriptorStruct.regionSection.flReg2.LIMIT << FLREGIONBITSHIFT
	);

	/* GBe region */
	printf(
		"%s: GBe start block: %08x ; GBe end block: %08x\n",
		romName,
		descriptorStruct.regionSection.flReg3.BASE << FLREGIONBITSHIFT,
		descriptorStruct.regionSection.flReg3.LIMIT << FLREGIONBITSHIFT
	);

	/* Platform region */
	printf(
		"%s: Platform start block: %08x ; Platform end block: %08x\n",
		romName,
		descriptorStruct.regionSection.flReg4.BASE << FLREGIONBITSHIFT,
		descriptorStruct.regionSection.flReg4.LIMIT << FLREGIONBITSHIFT
	);

	return;
}

/* This simply outputs (as strings) the contents of the descriptor */
/* This outputs in pandoc-flavoured Markdown */
int showDescriptorData(struct DESCRIPTORREGIONRECORD descriptorStruct)
{
	int i, j;

	printf("DESCRIPTOR REGION\n");
	printf("=================\n\n");

	printf("Flash Valid Signature Register\n");
	printf("------------------------------\n\n");

	printf("Signature = 0x%08x\n\n", descriptorStruct.flValSig.signature);

	printf("Flash Map Registers\n");
	printf("-------------------\n\n");

    printf("FLMAP0:\n\n");

    printf("- FCBA = 0x%02x\n", descriptorStruct.flMaps.flMap0.FCBA);
	printf("- NC = 0x%01x\n", descriptorStruct.flMaps.flMap0.NC);
	printf("- Reserved1 = 0x%02x\n", descriptorStruct.flMaps.flMap0.reserved1);
    printf("- FRBA = 0x%02x\n", descriptorStruct.flMaps.flMap0.FRBA);
	printf("- NR = 0x%01x\n", descriptorStruct.flMaps.flMap0.NR);
	printf("- Reserved2 = 0x%02x\n\n", descriptorStruct.flMaps.flMap0.reserved2);

	printf("FLMAP1:\n\n");

	printf("- FMBA = 0x%02x\n", descriptorStruct.flMaps.flMap1.FMBA);
	printf("- NM = 0x%01x\n", descriptorStruct.flMaps.flMap1.NM);
	printf("- Reserved = 0x%02x\n", descriptorStruct.flMaps.flMap1.reserved);
	printf("- FISBA = 0x%02x\n", descriptorStruct.flMaps.flMap1.FISBA);
	printf("- ISL = 0x%02x\n\n", descriptorStruct.flMaps.flMap1.ISL);

	printf("FLMAP2:\n\n");

	printf("- FMSBA = 0x%02x\n", descriptorStruct.flMaps.flMap2.FMSBA);
	printf("- MSL = 0x%02x\n", descriptorStruct.flMaps.flMap2.MSL);
	printf("- Reserved = 0x%04x\n\n", descriptorStruct.flMaps.flMap2.reserved);

    printf("Component Section Record\n");
    printf("------------------------\n\n");

	printf("FLCOMP:\n\n");

	printf("- *Component 1* Density = 0x%01x\n", descriptorStruct.componentSection.flcomp.component1Density);
	printf("- *Component 2* Density = 0x%01x\n", descriptorStruct.componentSection.flcomp.component2Density);
	printf("- Reserved1 = 0x%01x\n", descriptorStruct.componentSection.flcomp.reserved1);
	printf("- Reserved2 = 0x%02x\n", descriptorStruct.componentSection.flcomp.reserved2);
	printf("- Reserved3 = 0x%01x\n", descriptorStruct.componentSection.flcomp.reserved3);
	printf("- *Read* Clock Frequency = 0x%01x\n", descriptorStruct.componentSection.flcomp.readClockFrequency);
	printf("- *Fast Read* Support = 0x%01x\n", descriptorStruct.componentSection.flcomp.fastReadSupport);
	printf("- *Fast Read* Clock Frequency = 0x%01x\n", descriptorStruct.componentSection.flcomp.fastreadClockFrequency);
	printf("- *Write/Erase* Clock Frequency = 0x%01x\n", descriptorStruct.componentSection.flcomp.writeEraseClockFrequency);
	printf("- *Read Status* Clock Frequency = 0x%01x\n", descriptorStruct.componentSection.flcomp.readStatusClockFrequency);
	printf("- Reserved4 = 0x%01x\n\n", descriptorStruct.componentSection.flcomp.reserved4);

	printf("FLILL:\n\n");

    printf("- flill = 0x%08x\n\n", descriptorStruct.componentSection.flill);

	printf("FLPB:\n\n");

	printf("- flpb = 0x%08x\n\n", descriptorStruct.componentSection.flpb);

	printf("Padding:\n\n");

	for (i = 0; i < 36; i++) {
		if (descriptorStruct.componentSection.padding[i] != 0xFF) {
			for (j = 0; j < 36; j++) {
				printf("- Offset %d = 0x%02x\n", j, descriptorStruct.componentSection.padding[j]);
			}
			break;
		} else if (i == 35) {
            printf("- Every offset has a value of 0xFF\n");
			break;
		}
	}
	printf("\n");

	printf("Flash Descriptor Region Section\n");
    printf("-------------------------------\n\n");

    printf("This section defines the size and location of each region.\n\n");

	printf("FLREG0 (Descriptor):\n\n");

	printf("- flReg0BASE = 0x%04x\n", descriptorStruct.regionSection.flReg0.BASE);
	printf("- reserved1 = 0x%01x\n", descriptorStruct.regionSection.flReg0.reserved1);
	printf("- LIMIT = 0x%04x\n", descriptorStruct.regionSection.flReg0.LIMIT);
	printf("- reserved2 = 0x%01x\n\n", descriptorStruct.regionSection.flReg0.reserved2);

	printf("FLREG1 (BIOS):\n\n");

	printf("- BASE = 0x%04x\n", descriptorStruct.regionSection.flReg1.BASE);
	printf("- reserved1 = 0x%01x\n", descriptorStruct.regionSection.flReg1.reserved1);
	printf("- LIMIT = 0x%04x\n", descriptorStruct.regionSection.flReg1.LIMIT);
	printf("- reserved2 = 0x%01x\n\n", descriptorStruct.regionSection.flReg1.reserved2);

	printf("FLREG2 (ME):\n\n");

	printf("- BASE = 0x%04x\n", descriptorStruct.regionSection.flReg2.BASE);
	printf("- reserved1 = 0x%01x\n", descriptorStruct.regionSection.flReg2.reserved1);
	printf("- LIMIT = 0x%04x\n", descriptorStruct.regionSection.flReg2.LIMIT);
	printf("- reserved2 = 0x%01x\n\n", descriptorStruct.regionSection.flReg2.reserved2);

	printf("FLREG3 (Gbe):\n\n");

	printf("- BASE = 0x%04x\n", descriptorStruct.regionSection.flReg3.BASE);
	printf("- reserved1 = 0x%01x\n", descriptorStruct.regionSection.flReg3.reserved1);
	printf("- LIMIT = 0x%04x\n", descriptorStruct.regionSection.flReg3.LIMIT);
	printf("- reserved2 = 0x%01x\n\n", descriptorStruct.regionSection.flReg3.reserved2);

	printf("FLREG4 (Platform):\n\n");

	printf("- BASE = 0x%04x\n", descriptorStruct.regionSection.flReg4.BASE);
	printf("- reserved1 = 0x%01x\n", descriptorStruct.regionSection.flReg4.reserved1);
	printf("- LIMIT = 0x%04x\n", descriptorStruct.regionSection.flReg4.LIMIT);
	printf("- reserved2 = 0x%01x\n\n", descriptorStruct.regionSection.flReg4.reserved2);

	printf("Padding:\n\n");

	for (i = 0; i < 12; i++) {
		if (descriptorStruct.regionSection.padding[i] != 0xFF) {
			for (j = 0; j < 12; j++) {
				printf("- Offset %d = 0x%02x\n", j, descriptorStruct.regionSection.padding[j]);
			}
			break;
		} else if (i == 11) {
            printf("- Every offset has a value of 0xFF\n");
			break;
		}
	}
	printf("\n");

	/* Master Access Section */
	printf("Master Access Section\n");
    printf("---------------------\n\n");

	printf("FLMSTR1 (Host CPU / BIOS, e.g. flashrom running in GNU+Linux):\n\n");

    printf("*This is the part requiring modification for write protect!*\n\n");

	printf("- Requester ID = 0x%04x\n", descriptorStruct.masterAccessSection.flMstr1.requesterId);
	printf("- *Descriptor region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.fdRegionReadAccess);
	printf("- *BIOS region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.biosRegionReadAccess);
	printf("- *ME region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.meRegionReadAccess);
	printf("- *GbE region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.gbeRegionReadAccess);
	printf("- *Platform region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.pdRegionReadAccess);
	printf("- Reserved1 = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.reserved1);
	printf("- *Descriptor region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.fdRegionWriteAccess);
	printf("- *BIOS region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.biosRegionWriteAccess);
	printf("- *ME region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.meRegionWriteAccess);
	printf("- *GbE region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.gbeRegionWriteAccess);
	printf("- *Platform region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr1.pdRegionWriteAccess);
	printf("- reserved2 = 0x%01x\n\n", descriptorStruct.masterAccessSection.flMstr1.reserved2);

	printf("FLMSTR2 (ME):\n\n");

	printf("- Requester ID = 0x%04x\n", descriptorStruct.masterAccessSection.flMstr2.requesterId);
	printf("- *Descriptor region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.fdRegionReadAccess);
	printf("- *BIOS region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.biosRegionReadAccess);
	printf("- *ME region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.meRegionReadAccess);
	printf("- *GbE region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.gbeRegionReadAccess);
	printf("- *Platform region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.pdRegionReadAccess);
	printf("- reserved1 = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.reserved1);
	printf("- *Descriptor region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.fdRegionWriteAccess);
	printf("- *BIOS region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.biosRegionWriteAccess);
	printf("- *ME region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.meRegionWriteAccess);
	printf("- *GbE region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.gbeRegionWriteAccess);
	printf("- *Platform region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr2.pdRegionWriteAccess);
	printf("- reserved2 = 0x%01x\n\n", descriptorStruct.masterAccessSection.flMstr2.reserved2);

	printf("FLMSTR3 (GbE):\n\n");

	printf("- Requester ID = 0x%04x\n", descriptorStruct.masterAccessSection.flMstr3.requesterId);
	printf("- *Descriptor region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.fdRegionReadAccess);
	printf("- *BIOS region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.biosRegionReadAccess);
	printf("- *ME region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.meRegionReadAccess);
	printf("- *GbE Region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.gbeRegionReadAccess);
	printf("- *Platform region* Read Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.pdRegionReadAccess);
	printf("- reserved1 = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.reserved1);
	printf("- *Descriptor region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.fdRegionWriteAccess);
	printf("- *BIOS region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.biosRegionWriteAccess);
	printf("- *ME region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.meRegionWriteAccess);
	printf("- *GbE region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.gbeRegionWriteAccess);
	printf("- *Platform region* Write Access = 0x%01x\n", descriptorStruct.masterAccessSection.flMstr3.pdRegionWriteAccess);
	printf("- reserved2 = 0x%01x\n\n", descriptorStruct.masterAccessSection.flMstr3.reserved2);
	printf("Padding:\n\n");
	for (i = 0; i < 148; i++) {
		if (descriptorStruct.masterAccessSection.padding[i] != 0xFF) {
			for (j = 0; j < 148; j++) {
				printf("- Offset %d = 0x%02x\n", j, descriptorStruct.masterAccessSection.padding[j]);
			}
			break;
		} else if (i == 147) {
			printf("- Every offset has a value of 0xFF\n");
			break;
		}
	}
	printf("\n");

	/* ICH straps */
	printf("ICH straps\n");
    printf("----------\n\n");

	printf("ICHSTRAP0:\n\n");

	printf("- **ME Disable** = 0x%01x\n", descriptorStruct.ichStraps.ichStrap0.meDisable);
	printf("- reserved1 = 0x%02x\n", descriptorStruct.ichStraps.ichStrap0.reserved1);
	printf("- TCO Mode = 0x%01x\n", descriptorStruct.ichStraps.ichStrap0.tcoMode);
	printf("- SMBus Address = 0x%02x\n", descriptorStruct.ichStraps.ichStrap0.smBusAddress);
	printf("- BMC Mode = 0x%01x\n", descriptorStruct.ichStraps.ichStrap0.bmcMode);
	printf("- Trip Point Select = 0x%01x\n", descriptorStruct.ichStraps.ichStrap0.tripPointSelect);
	printf("- reserved2 = 0x%01x\n", descriptorStruct.ichStraps.ichStrap0.reserved2);
	printf("- Integrated GbE = 0x%01x\n", descriptorStruct.ichStraps.ichStrap0.integratedGbe);
	printf("- LAN Phy = 0x%01x\n", descriptorStruct.ichStraps.ichStrap0.lanPhy);
	printf("- reserved3 = 0x%01x\n", descriptorStruct.ichStraps.ichStrap0.reserved3);
	printf("- DMI Requester ID = 0x%01x\n", descriptorStruct.ichStraps.ichStrap0.dmiRequesterId);
	printf("- SMBus2 Address = 0x%02x\n\n", descriptorStruct.ichStraps.ichStrap0.smBus2Address);

	printf("ICHSTRAP1:\n\n");

	printf("- North M Link = 0x%01x\n", descriptorStruct.ichStraps.ichStrap1.northMlink);
	printf("- South M Link = 0x%01x\n", descriptorStruct.ichStraps.ichStrap1.southMlink);
	printf("- ME SMBus = 0x%01x\n", descriptorStruct.ichStraps.ichStrap1.meSmbus);
	printf("- SST Dynamic = 0x%01x\n", descriptorStruct.ichStraps.ichStrap1.sstDynamic);
	printf("- reserved1 = 0x%01x\n", descriptorStruct.ichStraps.ichStrap1.reserved1);
	printf("- North M Link 2 = 0x%01x\n", descriptorStruct.ichStraps.ichStrap1.northMlink2);
	printf("- reserved2 = 0x%02x\n", descriptorStruct.ichStraps.ichStrap1.reserved2);
	printf("- reserved3 = 0x%04x\n\n", descriptorStruct.ichStraps.ichStrap1.reserved3);

	printf("Padding:\n\n");

	for (i = 0; i < 248; i++) {
		if (descriptorStruct.ichStraps.padding[i] != 0xFF) {
			for (j = 0; j < 248; j++) {
				printf("- Offset %d = 0x%02x\n", j, descriptorStruct.ichStraps.padding[j]);
			}
			break;
		} else if (i == 247) {
			printf("- Every offset has a value of 0xFF\n");
			break;
		}
	}
	printf("\n");

	printf("MCH straps\n");
    printf("----------\n\n");

	printf("MCHSTRAP0:\n\n");

	printf("- **ME Disable** = 0x%01x\n", descriptorStruct.mchStraps.mchStrap0.meDisable);
	printf("- Boot ME from flash = 0x%01x\n", descriptorStruct.mchStraps.mchStrap0.meBootFromFlash);
	printf("- **TPM Disable** = 0x%01x\n", descriptorStruct.mchStraps.mchStrap0.tpmDisable);
	printf("- reserved1 = 0x%01x\n", descriptorStruct.mchStraps.mchStrap0.reserved1);
	printf("- SPI Fingerprint = 0x%01x\n", descriptorStruct.mchStraps.mchStrap0.spiFingerprint);
	printf("- ME Alternate Disable = 0x%01x\n", descriptorStruct.mchStraps.mchStrap0.meAlternateDisable);
	printf("- reserved2 = 0x%02x\n", descriptorStruct.mchStraps.mchStrap0.reserved2);
	printf("- reserved3 = 0x%04x\n\n", descriptorStruct.mchStraps.mchStrap0.reserved3);

	printf("Padding:\n\n");
	for (i = 0; i < 3292; i++) {
		if (descriptorStruct.mchStraps.padding[i] != 0xFF) {
			for (j = 0; j < 3292; j++) {
				printf("- Offset %d = 0x%02x\n", j, descriptorStruct.mchStraps.padding[j]);
			}
			break;
		} else if (i == 3291) {
			printf("- Every offset has a value of 0xFF\n");
			break;
		}
	}
	printf("\n");

	printf("ME VSCC Table\n");
    printf("-------------\n\n");

	printf("- JID0 = 0x%08x\n", descriptorStruct.meVsccTable.jid0);
	printf("- VSCC0 = 0x%08x\n", descriptorStruct.meVsccTable.vscc0);
	printf("- JID1 = 0x%08x\n", descriptorStruct.meVsccTable.jid1);
	printf("- VSCC1 = 0x%08x\n", descriptorStruct.meVsccTable.vscc1);
	printf("- JID2 = 0x%08x\n", descriptorStruct.meVsccTable.jid2);
	printf("- VSCC2 = 0x%08x\n\n", descriptorStruct.meVsccTable.vscc2);

	printf("Padding:\n\n");

	for (i = 0; i < 4; i++) {
		if (descriptorStruct.meVsccTable.padding[i] != 0xFF) {
			for (j = 0; j < 4; j++) {
				printf("- Offset %d = 0x%02x\n", j, descriptorStruct.meVsccTable.padding[j]);
			}
			break;
		} else if (i == 3) {
			printf("- Every offset has a value of 0xFF\n");
			break;
		}
	}
	printf("\n");

	printf("Descriptor Map 2 Record\n");
    printf("-----------------------\n\n");

	printf("- *ME VSCC Table* Base Address = 0x%02x\n", descriptorStruct.descriptor2Map.meVsccTableBaseAddress);
	printf("- *ME VSCC Table* Length = 0x%02x\n", descriptorStruct.descriptor2Map.meVsccTableLength);
	printf("- reserved = 0x%04x\n", descriptorStruct.descriptor2Map.reserved);
	printf("\n\n");

	printf("OEM section\n");
    printf("-----------\n\n");

    printf("Magic String:\n\n");

	for(i = 0; i < 8; i++) {
		printf("- Offset %d = 0x%02x\n", i, descriptorStruct.oemSection.magicString[i]);
	}
    printf("\n");

	printf("Padding:\n\n");

	for (i = 0; i < 248; i++) {
		if (descriptorStruct.oemSection.padding[i] != 0xFF) {
			for (j = 0; j < 248; j++) {
				printf("- Offset %d = 0x%02x\n", j, descriptorStruct.oemSection.padding[j]);
			}
			break;
		} else if (i == 247) {
			printf("- Every offset has a value of 0xFF\n");
			break;
		}
	}
	printf("\n");

	return 0;
}


code:
/*
 *  descriptor/descriptor.h
 *  This file is part of the ich9deblob utility from the libreboot project
 *
 *  Copyright (C) 2014, 2015, 2019 Leah Rowe <info@minifree.org>
 *  Copyright (C) 2014 Steve Shenton <sgsit@libreboot.org>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Purpose: provide struct representing descriptor region.
 * Map actual buffers of this regions, directly to instances of these
 * structs. This makes working with descriptor really easy.
 *
 * bit fields used, corresponding to datasheet. See links to datasheets
 * and documentation in ich9deblob.c
 */

/*
 * See docs/hardware/x200_remove_me.html for info plus links to datasheet (also linked below)
 *
 * Info about flash descriptor (read page 845 onwards):
 * http://www.intel.co.uk/content/dam/doc/datasheet/io-controller-hub-9-datasheet.pdf
 */

#ifndef DESCRIPTORSTRUCT_H
#define DESCRIPTORSTRUCT_H

#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include "../gbe/gbe.h" /* Needed for GBEREGIONSIZE_4K/8K define */

/* 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
 * To manipulate these easily in C, we shift them by FLREGIONBITSHIFT and then shift them back when done
 * (because this is how data is stored in the flash descriptor)
 */
#define FLREGIONBITSHIFT 0xC

/*
 * ---------------------------------------------------------------------
 * Descriptor struct representing the data
 * ---------------------------------------------------------------------
 */

/* Flash Valid Signature Register */
struct FLVALSIG
{
	/*
	 * 4 bytes.
	 * descriptor mode = 0FF0A55A (hex, big endian). Note: stored in ROM in little endian order.
	 * Anything else is considered invalid and will put the system in non-descriptor mode.
	 */
	uint32_t signature; /* Put 0x0FF0A55A here. confirmed in deblobbed_descriptor.bin */
};

/*  */
struct FLMAP0
{
	/* least signicant bits */
	uint8_t FCBA                      : 8;
	uint8_t NC                        : 2;
	uint8_t reserved1                 : 6;
	uint8_t FRBA                      : 8;
	uint8_t NR                        : 3;
	uint8_t reserved2                 : 5;
	/* most significant bits. */
};

struct FLMAP1
{
	/* least significant bits */
	uint8_t FMBA                      : 8;
	uint8_t NM                        : 3;
	uint8_t reserved                  : 5;
	uint8_t FISBA                     : 8;
	uint8_t ISL                       : 8;
	/* most significant bits */
};

struct FLMAP2
{
	/* least significant bits */
	uint8_t FMSBA                     : 8;
	uint8_t MSL                       : 8;
	uint16_t reserved                 : 16;
	/* most significant bits */
};

/* Flash Map Registers */
struct FLMAPS
{
	struct FLMAP0 flMap0;
	struct FLMAP1 flMap1;
	struct FLMAP2 flMap2;
};

/* Flash Components Register */
struct FLCOMP
{
	/* least significant bits */
	uint8_t component1Density         : 3;
	uint8_t component2Density         : 3;
	uint8_t reserved1                 : 2;
	uint8_t reserved2                 : 8;
	uint8_t reserved3                 : 1;
	uint8_t readClockFrequency        : 3;
	uint8_t fastReadSupport           : 1;
	uint8_t fastreadClockFrequency    : 3;
	uint8_t writeEraseClockFrequency  : 3;
	uint8_t readStatusClockFrequency  : 3;
	uint8_t reserved4                 : 2;
	/* most significant bits */
};

struct COMPONENTSECTIONRECORD
{
	struct FLCOMP flcomp;
	uint32_t flill;
	uint32_t flpb;
	uint8_t padding[36];
};

struct FLREG
{
	/* least significant bits */
	uint16_t BASE                     : 13;
	uint16_t reserved1                : 3;
	uint16_t LIMIT                    : 13;
	uint16_t reserved2                : 3;
	/* most significant bits */
};

/* Flash Descriptor Region Section */
/*
 * Defines where all the regions begin/end.
 * This is very important for disabling ME/AMT
 */
struct REGIONSECTIONRECORD
{
	struct FLREG flReg0;                         /*  Descriptor */
	struct FLREG flReg1;                         /*  BIOS       */
	struct FLREG flReg2;                         /*  ME         */
	struct FLREG flReg3;                         /*  Gbe        */
	struct FLREG flReg4;                         /*  Platform   */
	uint8_t padding[12];
};

struct FLMSTR
{
	/* least significant bits */
   uint16_t requesterId              : 16;
	uint8_t fdRegionReadAccess        : 1;
	uint8_t biosRegionReadAccess      : 1;
	uint8_t meRegionReadAccess        : 1;
	uint8_t gbeRegionReadAccess       : 1;
	uint8_t pdRegionReadAccess        : 1;
	uint8_t reserved1                 : 3; /* Must be zero, according to datasheet */
	uint8_t fdRegionWriteAccess       : 1;
	uint8_t biosRegionWriteAccess     : 1;
	uint8_t meRegionWriteAccess       : 1;
	uint8_t gbeRegionWriteAccess      : 1;
	uint8_t pdRegionWriteAccess       : 1;
	uint8_t reserved2                 : 3; /* Must be zero, according to datasheet */
	/* most significant bits */
};

/* Master Access Section */
struct MASTERACCESSSECTIONRECORD
{
	struct FLMSTR flMstr1;                       /* Flash Master 1 (Host CPU / BIOS) */
	struct FLMSTR flMstr2;                       /* Flash Master 2 (ME) */
	struct FLMSTR flMstr3;                       /* Flash Master 3 (Gbe) */
	uint8_t padding[148];
};

struct ICHSTRAP0
{
	/* least significant bits */
	                                             /* todo: add MeSmBus2Sel (boring setting) */
	uint8_t meDisable                 : 1; /* If true, ME is disabled. */
	uint8_t reserved1                 : 6;
	uint8_t tcoMode                   : 1; /* TCO Mode: (Legacy,TCO Mode) The TCO Mode, along with the BMCMODE strap, determines the behavior of the IAMT SmBus controller. */
	uint8_t smBusAddress              : 7; /* The ME SmBus 7-bit address. */
	uint8_t bmcMode                   : 1; /* BMC mode: If true, device is in BMC mode.  If Intel(R) AMT or ASF using Intel integrated LAN then this should be false. */
	uint8_t tripPointSelect           : 1; /* Trip Point Select: false the NJCLK input buffer is matched to 3.3v signal from the external PHY device, true is matched to 1.8v. */
	uint8_t reserved2                 : 2;
	uint8_t integratedGbe             : 1; /* Integrated GbE or PCI Express select: (PCI Express,,Integrated GbE) Defines what PCIe Port 6 is used for. */
	uint8_t lanPhy                    : 1; /* LANPHYPC_GP12_SEL: Set to 0 for GP12 to be used as GPIO (General Purpose Input/Output), or 1 for GP12 to be used for native mode as LAN_PHYPC for 82566 LCD device */
	uint8_t reserved3                 : 3;
	uint8_t dmiRequesterId            : 1; /* DMI requestor ID security check disable: The primary purpose of this strap is to support server environments with multiple CPUs that each have a different RequesterID that can access the Flash. */
	uint8_t smBus2Address             : 7; /* The ME SmBus 2 7-bit address. */
	/* most significant bits */
};

struct ICHSTRAP1
{
	/* least significant bits */
	uint8_t northMlink                : 1;  /* North MLink Dynamic Clock Gate Disable : Sets the default value for the South MLink Dynamic Clock Gate Enable registers. */
	uint8_t southMlink                : 1;  /* South MLink Dynamic Clock Gate Enable : Sets the default value for the South MLink Dynamic Clock Gate Enable registers. */
	uint8_t meSmbus                   : 1;  /* ME SmBus Dynamic Clock Gate Enable : Sets the default value for the ME SMBus Dynamic Clock Gate Enable for both the ME SmBus controllers. */
	uint8_t sstDynamic                : 1;  /* SST Dynamic Clock Gate Enable : Sets the default value for the SST Clock Gate Enable registers. */
	uint8_t reserved1                 : 4;
	uint8_t northMlink2               : 1;  /* North MLink 2 Non-Posted Enable : 'true':North MLink supports two downstream non-posted requests. 'false':North MLink supports one downstream non-posted requests. */
	uint8_t reserved2                 : 7;
	uint16_t reserved3                : 16;
	/* most significant bits */
};

/* ICH straps */
struct ICHSTRAPSRECORD
{
	struct ICHSTRAP0 ichStrap0;
	struct ICHSTRAP1 ichStrap1;
	uint8_t padding[248];
};

struct MCHSTRAP0
{
	/* least significant bits */
	uint8_t meDisable                 : 1;  /* If true, ME is disabled. */
	uint8_t meBootFromFlash           : 1;  /* ME boot from Flash - guessed location */
	uint8_t tpmDisable                : 1;  /* iTPM Disable : When set true, iTPM Host Interface is disabled. When set false (default), iTPM is enabled. */
	uint8_t reserved1                 : 3;
	uint8_t spiFingerprint            : 1;  /* SPI Fingerprint Sensor Present: Indicates if an SPI Fingerprint sensor is present at CS#1. */
	uint8_t meAlternateDisable        : 1;  /* ME Alternate Disable: Setting this bit allows ME to perform critical chipset functions but prevents loading of any ME FW applications. */
	uint8_t reserved2                 : 8;
	uint16_t reserved3                : 16;
	/* most significant bits */
};

/* MCH straps */
struct MCHSTRAPSRECORD
{
	struct MCHSTRAP0 mchStrap0;
	uint8_t padding[3292];
};

/* ME VSCC Table */
struct MEVSCCTABLERECORD
{
	uint32_t jid0;
	uint32_t vscc0;
	uint32_t jid1;
	uint32_t vscc1;
	uint32_t jid2;
	uint32_t vscc2;
	uint8_t padding[4];
};

/* Descriptor Map 2 Record */
struct DESCRIPTORMAP2RECORD
{
	/* least significant bits */
	uint8_t meVsccTableBaseAddress    : 8;
	uint8_t meVsccTableLength         : 8;
	uint16_t reserved                 : 16;
	/* most significant bits */
};

/* OEM section */
struct OEMSECTIONRECORD
{
	uint8_t magicString[8];
	uint8_t padding[248];
};

/* 4KiB descriptor region, goes at the beginning of the ROM image */
struct DESCRIPTORREGIONRECORD
{
	struct FLVALSIG flValSig;                                   /* Flash Valid Signature Register */
	struct FLMAPS flMaps;                                       /* Flash Map Registers */
	struct COMPONENTSECTIONRECORD componentSection;             /* Component Section Record */
	struct REGIONSECTIONRECORD regionSection;                   /* Flash Descriptor Region Section */
	struct MASTERACCESSSECTIONRECORD masterAccessSection;       /* Master Access Section */
	struct ICHSTRAPSRECORD ichStraps;                           /* ICH straps */
	struct MCHSTRAPSRECORD mchStraps;                           /* MCH straps */
	struct MEVSCCTABLERECORD meVsccTable;                       /* ME VSCC Table */
	struct DESCRIPTORMAP2RECORD descriptor2Map;                 /* Descriptor Map 2 Record */
	struct OEMSECTIONRECORD oemSection;                         /* OEM section */
};

/*
 * ---------------------------------------------------------------------
 * Function declarations (keep gcc/make happy. check them in descriptor.c)
 * ---------------------------------------------------------------------
 */

int validDescriptor(struct DESCRIPTORREGIONRECORD descriptorStruct);
struct DESCRIPTORREGIONRECORD descriptorHostRegionsUnlocked(struct DESCRIPTORREGIONRECORD descriptorStruct);
struct DESCRIPTORREGIONRECORD descriptorHostRegionsReadOnly(struct DESCRIPTORREGIONRECORD descriptorStruct);
struct DESCRIPTORREGIONRECORD descriptorMeRegionsForbidden(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 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);
int showDescriptorData(struct DESCRIPTORREGIONRECORD descriptorStruct);

#endif

license: mit