summaryrefslogtreecommitdiffstats
path: root/resources/utilities/ich9deblob/descriptor/descriptor.c
diff options
context:
space:
mode:
Diffstat (limited to 'resources/utilities/ich9deblob/descriptor/descriptor.c')
-rw-r--r--resources/utilities/ich9deblob/descriptor/descriptor.c170
1 files changed, 0 insertions, 170 deletions
diff --git a/resources/utilities/ich9deblob/descriptor/descriptor.c b/resources/utilities/ich9deblob/descriptor/descriptor.c
deleted file mode 100644
index aa3d84e..0000000
--- a/resources/utilities/ich9deblob/descriptor/descriptor.c
+++ /dev/null
@@ -1,170 +0,0 @@
-/*
- * descriptor/descriptor.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/>.
- */
-
-/*
- * Provide descriptor related functions.
- */
-
-/* structs describing the data in descriptor region */
-#include "descriptor.h"
-
-/*
- * ---------------------------------------------------------------------
- * Descriptor functions
- * ---------------------------------------------------------------------
- */
-
-/*
- * Modify the flash descriptor, to remove the ME/AMT, and disable all other regions
- * Only Flash Descriptor, Gbe and BIOS regions (BIOS region fills factoryRomSize-12k) are left.
- * Tested on ThinkPad X200 and X200S. X200T and other GM45 targets may also work.
- * Also described in docs/hcl/x200_remove_me.html
- */
-struct DESCRIPTORREGIONRECORD deblobbedDescriptorStructFromFactory(struct DESCRIPTORREGIONRECORD factoryDescriptorStruct, unsigned int factoryRomSize)
-{
- struct DESCRIPTORREGIONRECORD deblobbedDescriptorStruct;
- memcpy(&deblobbedDescriptorStruct, &factoryDescriptorStruct, DESCRIPTORREGIONSIZE);
-
- /*
- * 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)
- */
- deblobbedDescriptorStruct.flMaps.flMap0.NR = 2;
-
- /*
- * make descriptor writable from OS. This is that the user can run:
- * sudo ./flashrom -p internal:laptop=force_I_want_a_brick
- * from the OS, without relying an an external SPI flasher, while
- * being able to write to the descriptor region (locked by default,
- * until making the change below):
- */
- deblobbedDescriptorStruct.masterAccessSection.flMstr1.fdRegionWriteAccess = 1;
-
- /* relocate BIOS region and increase size to fill image */
- deblobbedDescriptorStruct.regionSection.flReg1.BASE = 3; // 3<<FLREGIONBITSHIFT is 12KiB, which is where BIOS region is to begin (after descriptor and gbe)
- deblobbedDescriptorStruct.regionSection.flReg1.LIMIT = ((factoryRomSize >> FLREGIONBITSHIFT) - 1);
- /*
- * ^ for example, 8MB ROM, that's 8388608 bytes.
- * ^ 8388608>>FLREGIONBITSHIFT (or 8388608/4096) = 2048 bytes
- * 2048 - 1 = 2047 bytes.
- * This defines where the final 0x1000 (4KiB) page starts in the flash chip, because the hardware does:
- * 2047<<FLREGIONBITSHIFT (or 2047*4096) = 8384512 bytes, or 7FF000 bytes
- * (it can't be 0x7FFFFF because of limited number of bits)
- */
-
- /* set ME region size to 0 - the ME is a blob, we don't want it in libreboot */
- deblobbedDescriptorStruct.regionSection.flReg2.BASE = 0x1FFF; // setting 1FFF means setting size to 0. 1FFF<<FLREGIONBITSHIFT is outside of the ROM image (8MB) size?
- /* ^ datasheet says to set this to 1FFF, but FFF was previously used and also worked. */
- deblobbedDescriptorStruct.regionSection.flReg2.LIMIT = 0;
- /*
- * ^ 0<<FLREGIONBITSHIFT=0, so basically, the size is 0,
- * ^ and the base (1FFF>>FLREGIONBITSHIFT) is well outside the higher 8MB range.
- */
-
- /* relocate Gbe region to begin at 4KiB (immediately after the flash descriptor) */
- deblobbedDescriptorStruct.regionSection.flReg3.BASE = 1; // 1<<FLREGIONBITSHIFT is 4096, which is where the Gbe region is to begin (after the descriptor)
- deblobbedDescriptorStruct.regionSection.flReg3.LIMIT = 2;
- /*
- * ^ 2<<FLREGIONBITSHIFT=8192 bytes. So we are set it to size 8KiB after the first 4KiB in the flash chip.
- */
-
- /* set Platform region size to 0 - another blob that we don't want */
- deblobbedDescriptorStruct.regionSection.flReg4.BASE = 0x1FFF; // setting 1FFF means setting size to 0. 1FFF<<FLREGIONBITSHIFT is outside of the ROM image (8MB) size?
- /* ^ datasheet says to set this to 1FFF, but FFF was previously used and also worked. */
- deblobbedDescriptorStruct.regionSection.flReg4.LIMIT = 0;
- /*
- * ^ 0<<FLREGIONBITSHIFT=0, so basically, the size is 0,
- * and the base (1FFF>>FLREGIONBITSHIFT) is well outside the higher 8MB range.
- */
-
- /* disable ME in ICHSTRAP0 - the ME is a blob, we don't want it in libreboot */
- deblobbedDescriptorStruct.ichStraps.ichStrap0.meDisable = 1;
-
- /* disable ME and TPM in MCHSTRAP0 */
- deblobbedDescriptorStruct.mchStraps.mchStrap0.meDisable = 1; // ME is a blob. not wanted in libreboot.
- deblobbedDescriptorStruct.mchStraps.mchStrap0.tpmDisable = 1; // not wanted in libreboot
-
- /*
- * disable ME, apart from chipset bugfixes (ME region should first be re-enabled above)
- * This is sort of like the CPU microcode updates, but for the chipset
- * (commented out below here, since blobs go against libreboot's purpose,
- * but may be interesting for others)
- * deblobbedDescriptorStruct.mchStraps.mchStrap0.meAlternateDisable = 1;
- */
-
- return deblobbedDescriptorStruct;
-}
-
-/*
- * ---------------------------------------------------------------------
- * 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 ; GBe end block: %08x\n",
- romName,
- descriptorStruct.regionSection.flReg4.BASE << FLREGIONBITSHIFT,
- descriptorStruct.regionSection.flReg4.LIMIT << FLREGIONBITSHIFT
- );
-
- return;
-}