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/*
* gbe/gbe.h
* This file is part of the ich9deblob utility from the libreboot project
*
* Copyright (C) 2014 Steve Shenton <sgsit@libreboot.org>
* Francis Rowe <info@gluglug.org.uk>
*
* 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 gbe region.
* Map actual buffers of this regions, directly to instances of these
* structs. This makes working with gbe really easy.
*/
/*
* bit fields used, corresponding to datasheet. See links to datasheets
* and documentation in ich9deblob.c
*/
#ifndef GBESTRUCT_H
#define GBESTRUCT_H
#include <stdio.h>
#include <string.h>
/* Size of the full gbe region in bytes */
#define GBEREGIONSIZE_8K 0x2000
/*
* Size of each sub-region in gbe.
* gbe contains two regions which
* can be identical: main and backup.
* These are each half the size of the full region
*/
#define GBEREGIONSIZE_4K 0x1000
/*
* When adding up the first 0x3F 16-bit words
* in a 4KiB GBE region, it should be equal
* to 0xBABA
*/
#define GBECHECKSUMTOTAL 0xBABA
/*
* These will have a modified descriptor+gbe based on what's in the factory.rom
* These will be joined into a single 12KiB buffer (descriptor, then gbe) and saved to a file
* NOTE: The GBE region of 8K is actually 2x 4K regions in a single region; both 4K blocks can be identical (and by default, are)
* The 2nd one is a "backup", but we don't know when it's used. perhaps it's used when the checksum on the first one does not match?
*/
/*
* ---------------------------------------------------------------------
* Gbe struct representing the data:
* ---------------------------------------------------------------------
*/
struct GBE_RESERVED_WORD_03H {
/* least significant bits */
unsigned short reserved1 : 11; /* bits should all be set to zero */
unsigned char ibaLom : 1; /* set to 1 for intel boot agent to work (i.e. set it to 0) */
unsigned char reserved2 : 4; /* bits should all be set to zero */
/* most significant bits */
};
/* Word 0A */
struct GBE_PCI_INITIALIZATION_CONTROL_WORD {
/* least significant bits */
unsigned char loadVendorDeviceId : 1; /* 1 = load from NVM. 0 = load from MAC fuses. It's 1 in my deblobbed_descriptor.bin */
unsigned char loadSubsystemId : 1; /* 1 = load from NVM. 0 = load from MAC fuses. It's 1 in my deblobbed_descriptor.bin */
unsigned char reserved1 : 1; /* Reserved. Set to 0 (according to datasheet). 0 in my deblobbed_descriptor.bin */
unsigned char reserved2 : 3; /* Reserved. Set them to 0 (according to datasheet). 0 in my deblobbed_descriptor.bin */
unsigned char pmEnable : 1; /* Power Management Enable. 1=Enable. It's 1 in my deblobbed_descriptor.bin */
unsigned char auxPwr : 1; /* Auxiliary Power Indication. See datasheet. it's 1 in my deblobbed_descriptor.bin */
unsigned char reserved3 : 4; /* Reserved. Set to 0000 (according to datasheet). */
unsigned char reserved4 : 4; /* Reserved. Set to 0001 (according to datasheet). */
/* most significant bits */
};
struct GBEREGIONRECORD_4K {
unsigned char macAddress[6]; /* Word 00 to 02 */
struct GBE_RESERVED_WORD_03H reservedWord03h; /* Reserved word 03. */
unsigned short reservedWord04h; /* Reserved word 04: set it to 0xFFFF (according to datasheet) */
unsigned short reservedWord05h; /* Reserved word 05: 83 10 (little endian) in my deblobbed_descriptor.bin. Set this to 0x1083 (in C, assuming little endian byte order). "cannot be changed" according to datasheet */
unsigned short reservedWords06h07h[2]; /* Reserved words 06-07: set both to 0xFFFF (according to datasheet) */
/*
* Word 08 and 09 (pba low and pba high):
*
* Both of these should be set to 0xFFFF by default, according to the datasheet.
* "nine digit printed board assembly (PBA) number" for intel cards to be stored
* in a 4 byte (read: 2 word) field.
*
* Example: if pba number is 123456-003, then word 08 should be 1234h and word 09 becomes 5603.
* Note: 1234 and 5603 above are big endian. In the image it would actually be 34 12 and 0356
*
* Example: in mine it was (in the image): 08 10 FF FF. That becomes 1008h and FFFFh, or
* basically: 1008FF-0FF. The same was observed in another.
*
* Setting it to FF FF FF FF should be fine, according to the datasheet.
*/
unsigned short pbaLow; /* Word 08. Set it to 0x1008. */
unsigned short pbaHigh; /* Word 09. Set it to 0xFFFF. */
/* Word 0A */
struct GBE_PCI_INITIALIZATION_CONTROL_WORD pciInitializationControlWord;
/*
* Word 0B; subsystem ID
*
* If load subsystem ID bit of word 0A (pci init control word) is
* set to 1 (read: it is. in my deblobbed_descriptor.bin), store
* the subsystem id here. Datasheet says that the default value is
* 0000h, but you should set this to 20EEh (little endian: EE 20)
*/
unsigned short subsystemId; /* Set this to 0x20EE */
/*
* Word 0C; subsystem vendor ID
*
* If load subsystem vendor ID bit of word 0A (pci init control word)
* is set to 1 (read: it is. in my deblobbed_descriptor.bin), store
* the subsystem vendor id here. Datasheet says that the default
* value is 8086h, but you should set this to 17AAh (lendian: AA 17).
*/
unsigned short subsystemVendorId; /* Set this to 0x17AA */
/*
* Word 0D: device ID
*
* If load vendor/device ID in word 0A (pci init control word) is 1
* (it is) then this word is used to init device id using word 21h,
* 1Eh or 1Fh. In my case, deviceId is 0x10F5. Word 21h is set to
* 0x10CB, word 1Eh is 0x10F5 and 1Fh is 0x10BF
*
* The datasheet says that 10F5 is for Intel 82567LM gigabit ethernet
* controller; 10BF is for Intel 82567LF and 10CB is for Intel 82567V.
*
* Based on this, the X200 is shown to have the Intel 82567LM ethernet
* controller.
*/
unsigned short deviceId; /* Set this to 0x10F5. */
/* It is important that this is correct, for the linux kernel driver */
/*
* Word 0E: vendor ID
*
* If load vendor/device ID in word 0A (pci init control) is 1 (it is),
* then this word used read to initialize the PCI vendor ID. Default
* value is 8086 according to datasheets, and deblobbed_descriptor.bin.
*
* Intel is often 8086 as a PCI vendor ID. Because 8086. As in the CPU architecture.
*/
unsigned short vendorId;
unsigned short deviceRevId; /* Word 0F: reserved bits. Set all bits to 0. */
unsigned short lanPowerConsumption;
unsigned short reserved6;
unsigned short reserved7;
unsigned short sharedInitializationControlWord;
unsigned short extendedConfigurationControlWord1;
unsigned short extendedConfigurationControlWord2;
unsigned short extendedConfigurationControlWord3;
unsigned short ledCtl1;
unsigned short ledCtl02;
unsigned short reserved8;
unsigned short reserved9;
unsigned short reserved10;
unsigned short reserved11;
unsigned short reserved12;
unsigned short _82567lmDeviceId;
unsigned short _82567lfDeviceId;
unsigned short reserved13;
unsigned short _82567vDeviceId;
unsigned short reserved14;
unsigned short reserved15;
unsigned short reserved16[12];
unsigned short pxeSoftwareRegion[15];
unsigned short checkSum; /* when added to the sum of all words above, this should match GBECHECKSUMTOTAL */
unsigned char padding1[3968];
};
/* main and backup region in gbe */
struct GBEREGIONRECORD_8K {
struct GBEREGIONRECORD_4K main;
struct GBEREGIONRECORD_4K backup;
/*
* Backup region:
* This is actually "main" on X200, since the real main has a bad checksum
* and other errors. You should do what you need on this one (if modifying
* lenovobios's gbe region) and then copy to main
*/
};
/*
* ---------------------------------------------------------------------
* Function declarations (keep gcc/make happy. check them in gbe.c)
* ---------------------------------------------------------------------
*/
unsigned short gbeGetRegionWordFrom8kBuffer(int index, char* regionData);
unsigned short gbeGetChecksumFrom8kBuffer(char* regionData, unsigned short desiredValue, int byteOffset);
unsigned short gbeGetChecksumFrom4kStruct(struct GBEREGIONRECORD_4K gbeStruct4k, unsigned short desiredValue);
struct GBEREGIONRECORD_8K deblobbedGbeStructFromFactory(struct GBEREGIONRECORD_8K factoryGbeStruct8k);
void printGbeChecksumDataFromStruct4k(struct GBEREGIONRECORD_4K gbeStruct4k, char* romName, char* regionName);
void printGbeChecksumDataFromStruct8k(struct GBEREGIONRECORD_8K gbeStruct8k, char* romName);
#endif
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