From 1b5c10a8c08a5c5d5c43c02dddbedd6961fbf2e4 Mon Sep 17 00:00:00 2001
From: Francis Rowe <info@gluglug.org.uk>
Date: Tue, 23 Dec 2014 17:03:26 -0500
Subject: ich9deblob: unify comment styling

---
(limited to 'resources/utilities/ich9deblob/ich9deblob.c')

diff --git a/resources/utilities/ich9deblob/ich9deblob.c b/resources/utilities/ich9deblob/ich9deblob.c
index 49d5a9b..94bc2c2 100644
--- a/resources/utilities/ich9deblob/ich9deblob.c
+++ b/resources/utilities/ich9deblob/ich9deblob.c
@@ -21,6 +21,8 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  
+/* Initially based on proof of concept by Steve Shenton. */
+ 
 /*
  * Read a factory.rom dump (ich9m/gm45 machines) and 
  * modify the flash descriptor to remove all regions except descriptor,
@@ -31,72 +33,86 @@
  * for use in libreboot. Currently tested: ThinkPad X200 (coreboot/libreboot)
  */
  
-// See docs/hcl/x200_remove_me.html for info plus links to datasheet (also linked below)
-
-// Info about flash descriptor (read page 850 onwards):
-// * http://www.intel.co.uk/content/dam/doc/datasheet/io-controller-hub-9-datasheet.pdf
-
-// Info about Gbe region (read whole datasheet):
-// * http://www.intel.co.uk/content/dam/doc/application-note/i-o-controller-hub-9m-82567lf-lm-v-nvm-map-appl-note.pdf
-// * https://communities.intel.com/community/wired/blog/2010/10/14/how-to-basic-eeprom-checksums
+/*
+ * See docs/hcl/x200_remove_me.html for info plus links to datasheet (also linked below)
+ * 
+ * Info about flash descriptor (read page 850 onwards):
+ * http://www.intel.co.uk/content/dam/doc/datasheet/io-controller-hub-9-datasheet.pdf
+ * 
+ * Info about Gbe region (read whole datasheet):
+ * http://www.intel.co.uk/content/dam/doc/application-note/i-o-controller-hub-9m-82567lf-lm-v-nvm-map-appl-note.pdf
+ * https://communities.intel.com/community/wired/blog/2010/10/14/how-to-basic-eeprom-checksums
+ */
 
 #include <stdio.h>
 #include <string.h>
-#include "descriptor/descriptor.h" // structs describing what's in the descriptor region
-#include "gbe/gbe.h" // structs describing what's in the gbe region, plus functions that use them
-#include "x86compatibility.c" // compatibility checks. this utility is not portable yet.
+#include "descriptor/descriptor.h" /* structs describing what's in the descriptor region */
+#include "gbe/gbe.h"               /* structs describing what's in the gbe region, plus functions that use them */
+#include "x86compatibility.c"      /* compatibility checks. this utility is not portable yet. */
 
 int main(int argc, char *argv[])
 {
-	// descriptor region. Will have an actual descriptor struct mapped to it (from the factory.rom dump)
-	// and then it will be modified (deblobbed) to remove the ME/AMT
+	/*
+	 * descriptor region. Will have an actual descriptor struct mapped to it (from the factory.rom dump)
+	 * and then it will be modified (deblobbed) to remove the ME/AMT
+	 */
 	char factoryDescriptorBuffer[DESCRIPTORREGIONSIZE];
 	struct DESCRIPTORREGIONRECORD factoryDescriptorStruct;
 	char deblobbedDescriptorBuffer[DESCRIPTORREGIONSIZE];
 	struct DESCRIPTORREGIONRECORD deblobbedDescriptorStruct;
 	
-	// gbe region. Well have actual gbe buffer mapped to it (from the factory.rom dump)
-	// and then it will be modified to correct the main region
+	/* 
+	 * gbe region. Well have actual gbe buffer mapped to it (from the factory.rom dump)
+	 * and then it will be modified to correct the main region
+	 */
 	char factoryGbeBuffer8k[GBEREGIONSIZE];
 	struct GBEREGIONRECORD_8K factoryGbeStruct8k;
 	char deblobbedGbeBuffer8k[GBEREGIONSIZE];
 	struct GBEREGIONRECORD_8K deblobbedGbeStruct8k;
 	
-	// Used to store the location of the Gbe
-	// region inside the factory.rom image.
+	/*
+	 * Used to store the location of the Gbe
+	 * region inside the factory.rom image.
+	 */
 	unsigned int factoryGbeRegionStart;
 	
-	// names of the files that this utility will handle
-	char* factoryRomFilename = "factory.rom"; // user-supplied factory.bin dump (original firmware)
-	char* deblobbedDescriptorFilename = "deblobbed_descriptor.bin"; // descriptor+gbe: to be dd'd to beginning of a libreboot image
+	/* names of the files that this utility will handle */
+	char* factoryRomFilename = "factory.rom";                       /* user-supplied factory.bin dump (original firmware) */
+	char* deblobbedDescriptorFilename = "deblobbed_descriptor.bin"; /* descriptor+gbe: to be dd'd to beginning of a libreboot image */
 	
-	// Used when reading the factory.rom to extract descriptor/gbe regions
+	/* Used when reading the factory.rom to extract descriptor/gbe regions */
 	unsigned int bufferLength;
 	
-	// For storing the size of the factory.rom dump in bytes
+	/* For storing the size of the factory.rom dump in bytes */
 	unsigned int factoryRomSize;
 	
-	// -----------------------------------------------------------------------------------------------
-	
-	// Compatibility checks. This version of ich9deblob is not yet porable.
+	/*
+	 * ------------------------------------------------------------------
+	 * Compatibility checks. This version of ich9deblob is not yet portable.
+	 * ------------------------------------------------------------------
+	 */
+
 	if (systemOrCompilerIncompatible(factoryDescriptorStruct, factoryGbeStruct8k)) return 1;
+	/* If true, fail with error message */
 	
-	// -----------------------------------------------------------------------------------------------
-
-	// Open factory.rom, needed for extracting descriptor and gbe
-	// -----------------------------------------------
+	/*
+	 * ------------------------------------------------------------------
+	 * Extract the descriptor and gbe regions from the factory.rom dump
+	 * ------------------------------------------------------------------
+	 */
 	FILE* fileStream = NULL;
-	fileStream = fopen(factoryRomFilename, "rb"); // open factory.rom
+	fileStream = fopen(factoryRomFilename, "rb"); /* open factory.rom */
 	if (NULL == fileStream)
 	{
 		printf("\nerror: could not open factory.rom\n");
 		return 1;
 	}
 	printf("\nfactory.rom opened successfully\n");
-	// -----------------------------------------------
 	
-	// Get the descriptor region dump from the factory.rom
-	// (goes in factoryDescriptorBuffer variable)
+	/* 
+	 * Get the descriptor region dump from the factory.rom
+	 * (goes in factoryDescriptorBuffer variable)
+	 */
 	bufferLength = fread(factoryDescriptorBuffer, sizeof(char), DESCRIPTORREGIONSIZE, fileStream);
 	if (DESCRIPTORREGIONSIZE != bufferLength) // 
 	{
@@ -104,30 +120,38 @@ int main(int argc, char *argv[])
 		return 1;
 	}
 	printf("\ndescriptor region read successfully\n");
-	// copy descriptor buffer into descriptor struct memory
-	// factoryDescriptorStruct is an instance of a struct that actually
-	// defines the locations of all these variables in the descriptor,
-	// as defined in the datasheets. This allows us to map the extracted
-	// descriptor over the struct so that it can then be modified
-	// for libreboot's purpose
+	/*
+	 * copy descriptor buffer into descriptor struct memory
+	 * factoryDescriptorStruct is an instance of a struct that actually
+	 * defines the locations of all these variables in the descriptor,
+	 * as defined in the datasheets. This allows us to map the extracted
+	 * descriptor over the struct so that it can then be modified
+	 * for libreboot's purpose
+	 */
 	memcpy(&factoryDescriptorStruct, &factoryDescriptorBuffer, DESCRIPTORREGIONSIZE);
-	// ^ the above is just for reference if needed. The modifications will be made here:
+	/*
+	 * ^ the above is just for reference if needed. The modifications will be made here:
+	 */
 	memcpy(&deblobbedDescriptorStruct, &factoryDescriptorBuffer, DESCRIPTORREGIONSIZE);
 	
-	// -----------------------------------------------------------------------------------------------
-	
-	// Get the gbe region dump from the factory.rom
-
-	// get original GBe region location
-	// (it will be moved to the beginning of the flash, after the descriptor region)
-	// note for example, factoryGbeRegionStart is set to <<FLREGIONBITSHIFT of actual address (in C). this is how the addresses
-	// are stored in the descriptor.
+	/*
+	 * Get the gbe region dump from the factory.rom
+	 */
+
+	/*
+	 * get original GBe region location
+	 * (it will be moved to the beginning of the flash, after the descriptor region)
+	 * note for example, factoryGbeRegionStart is set to <<FLREGIONBITSHIFT of actual address (in C). this is how the addresses
+	 * are stored in the descriptor.
+	 */
 	factoryGbeRegionStart = factoryDescriptorStruct.regionSection.flReg3.BASE << FLREGIONBITSHIFT;
 
-	// Set offset so that we can read the data from
-	// the gbe region
+	/*
+	 * Set offset so that we can read the data from
+	 * the gbe region
+	 */
 	fseek(fileStream, factoryGbeRegionStart, SEEK_SET);
-	// Read the gbe data from the factory.rom and put it in factoryGbeBuffer8k
+	/* Read the gbe data from the factory.rom and put it in factoryGbeBuffer8k */
 	bufferLength = fread(factoryGbeBuffer8k, sizeof(char), GBEREGIONSIZE, fileStream);
 	if (GBEREGIONSIZE != bufferLength)
 	{
@@ -135,20 +159,24 @@ int main(int argc, char *argv[])
 		return 1;
 	}
 	printf("\ngbe (8KiB) region read successfully\n");
-	// copy gbe buffer into gbe struct memory
-	// factoryGbeStruct8k is an instance of a struct that actually
-	// defines the locations of all these variables in the gbe,
-	// as defined in the datasheets. This allows us to map the extracted
-	// gbe over the struct so that it can then be modified
-	// for libreboot's purpose
+	/*
+	 * copy gbe buffer into gbe struct memory
+	 * factoryGbeStruct8k is an instance of a struct that actually
+	 * defines the locations of all these variables in the gbe,
+	 * as defined in the datasheets. This allows us to map the extracted
+	 * gbe over the struct so that it can then be modified
+	 * for libreboot's purpose
+	 */
 	memcpy(&factoryGbeStruct8k, &factoryGbeBuffer8k, GBEREGIONSIZE);
-	// the original factoryGbeStruct8k is only reference. Changes go here:
+	/*
+	 * the original factoryGbeStruct8k is only reference. Changes go here:
+	 */
 	memcpy(&deblobbedGbeStruct8k, &factoryGbeBuffer8k, GBEREGIONSIZE);
 
-	// -----------------------------------------------------------------------------------------------
-
-	// Get size of ROM image
-	// This is needed for relocating the BIOS region (per descriptor)
+	/* 
+	 * Get size of ROM image
+	 * This is needed for relocating the BIOS region (per descriptor)
+	 */
 	fseek(fileStream, 0L, SEEK_END);
 	factoryRomSize = ftell(fileStream);
 
@@ -156,38 +184,51 @@ int main(int argc, char *argv[])
 
 	fclose(fileStream);
 	
-	// -----------------------------------------------------------------------------------------------
-
-	// Disable the ME and Platform regions. Put Gbe at the beginning (after descriptor). 
-	// Also, extend the BIOS region to fill the ROM image (after descriptor+gbe).
+	/*
+	 * ------------------------------------------------------------------
+	 * Modify the descriptor and gbe regions, ready to go in libreboot.rom
+	 * ------------------------------------------------------------------
+	 */
+
+	/*
+	 * Disable the ME and Platform regions. Put Gbe at the beginning (after descriptor). 
+	 * Also, extend the BIOS region to fill the ROM image (after descriptor+gbe).
+	 */
 	deblobbedDescriptorStruct = deblobbedDescriptorStructFromFactory(factoryDescriptorStruct, factoryRomSize);
 
-	// ----------------------------------------------------------------------------------------------------------------
-
-	// Modify the Gbe descriptor (see function for details)
+	/*
+	 * Modify the Gbe region (see function for details)
+	 */
 	deblobbedGbeStruct8k = deblobbedGbeStructFromFactory(factoryGbeStruct8k);
 
-	// ----------------------------------------------------------------------------------------------------------------
-
-	// Convert the deblobbed descriptor and gbe back to byte arrays, so that they
-	// can more easily be written to files:
-	// deblobbed descriptor region
-	memcpy(&deblobbedDescriptorBuffer, &deblobbedDescriptorStruct, DESCRIPTORREGIONSIZE); // descriptor
-	memcpy(&deblobbedGbeBuffer8k, &deblobbedGbeStruct8k, GBEREGIONSIZE); // gbe
-
-	// delete old file before continuing
+	/*
+	 * ------------------------------------------------------------------
+	 * Create the file with the modified descriptor and gbe inside
+	 * ------------------------------------------------------------------
+	 */
+
+	/*
+	 * Convert the deblobbed descriptor and gbe back to byte arrays, so that they
+	 * can more easily be written to files:
+	 * deblobbed descriptor region
+	 */
+	memcpy(&deblobbedDescriptorBuffer, &deblobbedDescriptorStruct, DESCRIPTORREGIONSIZE); /* descriptor */
+	memcpy(&deblobbedGbeBuffer8k, &deblobbedGbeStruct8k, GBEREGIONSIZE);                  /* gbe */
+
+	/* delete old file before continuing */
 	remove(deblobbedDescriptorFilename);
-	// open new file for writing the deblobbed descriptor+gbe
+	
+	/* open new file for writing the deblobbed descriptor+gbe */
 	fileStream = fopen(deblobbedDescriptorFilename, "ab");
 
-	// write the descriptor region into the first part
+	/* write the descriptor region into the first part */
 	if (DESCRIPTORREGIONSIZE != fwrite(deblobbedDescriptorBuffer, sizeof(char), DESCRIPTORREGIONSIZE, fileStream))
 	{
 		printf("\nerror: writing descriptor region failed\n");
 		return 1;
 	}
 
-	// add gbe to the end of the file
+	/* add gbe to the end of the file */
 	if (GBEREGIONSIZE != fwrite(deblobbedGbeBuffer8k, sizeof(char), GBEREGIONSIZE, fileStream))
 	{
 		printf("\nerror: writing GBe region failed\n");
--
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