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/*
* ich9desc.c
* 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 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
struct FLVALSIG{
unsigned int signature;
};
struct FLMAP0 {
// least signicant bits
unsigned char FCBA : 8;
unsigned char NC : 2;
unsigned char : 6;
// ^^^^ unnamed members like these represent unused bits (per datasheet).
// the same applies for all structs in this file.
unsigned char FRBA : 8;
unsigned char NR : 3;
unsigned char : 5;
// most significant bits.
// the datasheet lists msb's first and lsb's last, in each table.
// meanwhile, x86 gcc treats the members at the top of the struct as lsb's
// and at the bottom of the struct, the members there are msb's. The same
// fact applies to all the other structs below.
// non-x86 (and/or non-gcc) is untested
// little endian assumed
};
struct FLMAP1 {
unsigned char FMBA : 8;
unsigned char NM : 3;
unsigned char : 5;
unsigned char FISBA : 8;
unsigned char ISL : 8;
};
struct FLMAP2 {
unsigned char FMSBA : 8;
unsigned char MSL : 8;
unsigned short : 16;
};
struct FLMAPS {
struct FLMAP0 flMap0;
struct FLMAP1 flMap1;
struct FLMAP2 flMap2;
};
struct FLCOMP {
unsigned char component1Density : 3;
unsigned char component2Density : 3;
unsigned char : 2;
unsigned char : 8;
unsigned char : 1;
unsigned char readClockFrequency : 3;
unsigned char fastReadSupport : 1;
unsigned char fastreadClockFrequency : 3;
unsigned char writeEraseClockFrequency : 3;
unsigned char readStatusClockFrequency : 3;
unsigned char : 2;
};
struct COMPONENTSECTIONRECORD {
struct FLCOMP flcomp;
unsigned int flill;
unsigned int flpb;
unsigned char padding[36];
};
struct FLREG {
unsigned short BASE : 13;
unsigned short : 3;
unsigned short LIMIT : 13;
unsigned short : 3;
};
struct REGIONSECTIONRECORD {
struct FLREG flReg0; // Descriptor
struct FLREG flReg1; // BIOS
struct FLREG flReg2; // ME
struct FLREG flReg3; // Gbe
struct FLREG flReg4; // Platform
unsigned char padding[12];
};
struct FLMSTR {
unsigned short requesterId : 16;
unsigned char fdRegionReadAccess : 1;
unsigned char biosRegionReadAccess : 1;
unsigned char meRegionReadAccess : 1;
unsigned char gbeRegionReadAccess : 1;
unsigned char pdRegionReadAccess : 1;
unsigned char reserved1 : 3;
unsigned char fdRegionWriteAccess : 1;
unsigned char biosRegionWriteAccess : 1;
unsigned char meRegionWriteAccess : 1;
unsigned char gbeRegionWriteAccess : 1;
unsigned char pdRegionWriteAccess : 1;
unsigned char reserved2 : 3;
};
struct MASTERACCESSSECTIONRECORD {
struct FLMSTR flMstr1;
struct FLMSTR flMstr2;
struct FLMSTR flMstr3;
unsigned char padding[148];
};
struct ICHSTRAP0 {
// todo: add MeSmBus2Sel (boring setting)
unsigned char meDisable : 1; // If true, ME is disabled.
unsigned char : 6;
unsigned char tcoMode : 1; // TCO Mode: (Legacy,TCO Mode) The TCO Mode, along with the BMCMODE strap, determines the behavior of the IAMT SmBus controller.
unsigned char smBusAddress : 7; // The ME SmBus 7-bit address.
unsigned char 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.
unsigned char 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.
unsigned char : 2;
unsigned char integratedGbe : 1; // Integrated GbE or PCI Express select: (PCI Express,,Integrated GbE) Defines what PCIe Port 6 is used for.
unsigned char 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
unsigned char : 3;
unsigned char 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.
unsigned char smBus2Address : 7; // The ME SmBus 2 7-bit address.
};
struct ICHSTRAP1 {
unsigned char northMlink : 1; // North MLink Dynamic Clock Gate Disable : Sets the default value for the South MLink Dynamic Clock Gate Enable registers.
unsigned char southMlink : 1; // South MLink Dynamic Clock Gate Enable : Sets the default value for the South MLink Dynamic Clock Gate Enable registers.
unsigned char 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.
unsigned char sstDynamic : 1; // SST Dynamic Clock Gate Enable : Sets the default value for the SST Clock Gate Enable registers.
unsigned char : 4;
unsigned char 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.
unsigned char : 7;
unsigned short : 16;
};
struct ICHSTRAPSRECORD {
struct ICHSTRAP0 ichStrap0;
struct ICHSTRAP1 ichStrap1;
unsigned char padding[248];
};
struct MCHSTRAP0 {
unsigned char meDisable : 1; // If true, ME is disabled.
unsigned char meBootFromFlash : 1; // ME boot from Flash - guessed location
unsigned char tpmDisable : 1; // iTPM Disable : When set true, iTPM Host Interface is disabled. When set false (default), iTPM is enabled.
unsigned char : 3;
unsigned char spiFingerprint : 1; // SPI Fingerprint Sensor Present: Indicates if an SPI Fingerprint sensor is present at CS#1.
unsigned char meAlternateDisable : 1; // ME Alternate Disable: Setting this bit allows ME to perform critical chipset functions but prevents loading of any ME FW applications.
unsigned char : 8;
unsigned short : 16;
};
struct MCHSTRAPSRECORD {
struct MCHSTRAP0 mchStrap0;
unsigned char padding[3292];
};
struct MEVSCCTABLERECORD {
unsigned int jid0;
unsigned int vscc0;
unsigned int jid1;
unsigned int vscc1;
unsigned int jid2;
unsigned int vscc2;
unsigned char padding[4];
};
struct DESCRIPTORMAP2RECORD {
unsigned char meVsccTableBaseAddress : 8;
unsigned char meVsccTableLength : 8;
unsigned short : 16;
};
struct OEMSECTIONRECORD {
unsigned char magicString[8];
unsigned char padding[248];
};
struct DESCRIPTORREGIONRECORD {
struct FLVALSIG flValSig;
struct FLMAPS flMaps;
struct COMPONENTSECTIONRECORD componentSection;
struct REGIONSECTIONRECORD regionSection;
struct MASTERACCESSSECTIONRECORD masterAccessSection;
struct ICHSTRAPSRECORD ichStraps;
struct MCHSTRAPSRECORD mchStraps;
struct MEVSCCTABLERECORD meVsccTable;
struct DESCRIPTORMAP2RECORD descriptor2Map;
struct OEMSECTIONRECORD oemSection;
};
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