diff options
author | Jonathan Neuschäfer <j.neuschaefer@gmx.net> | 2018-04-15 20:33:50 +0200 |
---|---|---|
committer | Patrick Georgi <pgeorgi@google.com> | 2018-04-17 17:18:07 +0000 |
commit | 7719d50352272e27528f99e60df1c861300e14a9 (patch) | |
tree | 6208b67b05e3cdc3c9a7700f8810fbc52cd8c5a9 /Documentation | |
parent | a2e17586dcb69bb4c66f30025b3cea56554a9f28 (diff) | |
download | coreboot-7719d50352272e27528f99e60df1c861300e14a9.tar.xz |
Documentation/Intel: Adjust heading levels
Adjust the headings so that there is only one h1 tag per file.
Change-Id: I53f9ee47957fcde521b64c0123dac10f051c681c
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/25684
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/Intel/Board/board.html | 10 | ||||
-rw-r--r-- | Documentation/Intel/Board/galileo.html | 8 | ||||
-rw-r--r-- | Documentation/Intel/SoC/quark.html | 14 | ||||
-rw-r--r-- | Documentation/Intel/SoC/soc.html | 52 | ||||
-rw-r--r-- | Documentation/Intel/fsp1_1.html | 12 | ||||
-rw-r--r-- | Documentation/Intel/index.html | 20 | ||||
-rw-r--r-- | Documentation/Intel/vboot.html | 26 |
7 files changed, 72 insertions, 70 deletions
diff --git a/Documentation/Intel/Board/board.html b/Documentation/Intel/Board/board.html index d09805bddd..4ba51df401 100644 --- a/Documentation/Intel/Board/board.html +++ b/Documentation/Intel/Board/board.html @@ -22,7 +22,7 @@ <hr> -<h1><a name="RequiredFiles">Required Files</a></h1> +<h2><a name="RequiredFiles">Required Files</a></h2> <p> Create the board directory as src/mainboard/<Vendor>/<Board>. </p> @@ -80,7 +80,7 @@ <hr> -<h1><a name="SerialOutput">Enable Serial Output</a></h1> +<h2><a name="SerialOutput">Enable Serial Output</a></h2> <p> Use the following steps to enable serial output: </p> @@ -103,7 +103,7 @@ <hr> -<h1><a name="SpdData">Memory Timing Data</a></h1> +<h2><a name="SpdData">Memory Timing Data</a></h2> <p> Memory timing data is located in the flash. This data is in the format of <a target="_blank" href="https://en.wikipedia.org/wiki/Serial_presence_detect">serial presence detect</a> @@ -183,7 +183,7 @@ <hr> -<h1><a name="DisablePciDevices">Disable PCI Devices</a></h1> +<h2><a name="DisablePciDevices">Disable PCI Devices</a></h2> <p> Ramstage's BS_DEV_ENUMERATE state displays the PCI vendor and device IDs for all of the devices in the system. Edit the devicetree.cb file: @@ -209,7 +209,7 @@ <hr> -<h1><a name="AcpiTables">ACPI Tables</a></h1> +<h2><a name="AcpiTables">ACPI Tables</a></h2> <ol> <li>Edit Kconfig <ol type="A"> diff --git a/Documentation/Intel/Board/galileo.html b/Documentation/Intel/Board/galileo.html index cdc8fda85f..cd0a28ac35 100644 --- a/Documentation/Intel/Board/galileo.html +++ b/Documentation/Intel/Board/galileo.html @@ -26,7 +26,7 @@ <hr> -<h1>Galileo Board Documentation</h1> +<h2>Galileo Board Documentation</h2> <ul> <li>Common Components <ul> @@ -46,7 +46,7 @@ <li>Make a bootable <a target="_blank" href="https://software.intel.com/en-us/get-started-galileo-linux-step1">micro SD card</a></li> </ul> -<h2>Galileo Gen 2 Board Documentation</h2> +<h3>Galileo Gen 2 Board Documentation</h3> <ul> <li><a target="_blank" href="http://files.linuxgizmos.com/intel_galileo_gen2_blockdiagram.jpg">Block Diagram</a></li> <li><a target="_blank" href="https://software.intel.com/en-us/iot/library/galileo-getting-started">Getting Started</a></li> @@ -70,7 +70,7 @@ </li> </ul> -<h2>Galileo Gen 1 Board Documentation</h2> +<h3>Galileo Gen 1 Board Documentation</h3> <ul> <li><a target="_blank" href="http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/galileo-g1-datasheet.pdf">Datasheet</a></li> <li><a target="_blank" href="http://www.intel.com/content/dam/www/public/us/en/documents/guides/galileo-g1-schematic.pdf">Schematic</a></li> @@ -89,7 +89,7 @@ <hr> -<h1>Debug Tools</h1> +<h2>Debug Tools</h2> <ul> <li>Flash Programmer: <ul> diff --git a/Documentation/Intel/SoC/quark.html b/Documentation/Intel/SoC/quark.html index 9c180daf41..c3eead2e33 100644 --- a/Documentation/Intel/SoC/quark.html +++ b/Documentation/Intel/SoC/quark.html @@ -28,7 +28,7 @@ <hr> -<h1>Quark™ Documentation</h1> +<h2>Quark™ Documentation</h2> <ul> <li><a target="_blank" href="http://www.intel.com/content/dam/www/public/us/en/images/embedded/16x9/edc-quark-block-diagram-16x9.png">Block Diagram</a></li> <li><a target="_blank" href="http://www.intel.com/content/www/us/en/embedded/products/quark/specifications.html">Specifications</a>: @@ -49,7 +49,7 @@ <hr> -<h1><a name="CorebootPayloadPkg">Quark™ EDK2 CorebootPayloadPkg</a></h1> +<h2><a name="CorebootPayloadPkg">Quark™ EDK2 CorebootPayloadPkg</a></h2> <p> Build Instructions: </p> @@ -81,7 +81,7 @@ dir Build\CorebootPayloadPkgIA32\DEBUG_VS2015x86\FV\UEFIPAYLOAD.fd <hr> -<h1><a name="BuildEnvironment">Quark™ EDK2 Build Environment</a></h1> +<h2><a name="BuildEnvironment">Quark™ EDK2 Build Environment</a></h2> <p> Use the following steps to setup a build environment: </p> @@ -118,7 +118,7 @@ edksetup.bat <hr> -<h1><a name="QuarkFsp">Quark™ FSP</a></h1> +<h2><a name="QuarkFsp">Quark™ FSP</a></h2> <p> Getting the Quark FSP source: </p> @@ -130,7 +130,7 @@ Getting the Quark FSP source: <li>Use git to clone <a target="_blank" href="https://review.gerrithub.io/#/admin/projects/LeeLeahy/quarkfsp">QuarkFspPkg</a> into the QuarkFpsPkg directory (.)</li> </ol> -<h2>Building QuarkFspPkg</h2> +<h3>Building QuarkFspPkg</h3> <p> There are two versions of FSP: FSP 1.1 and FSP 2.0. There are also two different implementations of FSP, one using subroutines without SEC and @@ -157,7 +157,7 @@ Build commands shown building debug FSP: </li> </ul> -<h2>Copying FSP files into coreboot Source Tree</h2> +<h3>Copying FSP files into coreboot Source Tree</h3> <p> There are some helper scripts to copy the FSP output into the coreboot source tree. The parameters to these scripts are: @@ -182,7 +182,7 @@ Script files: <hr> -<h1>Quark™ EDK2 BIOS</h1> +<h2>Quark™ EDK2 BIOS</h2> <p> Build Instructions: </p> diff --git a/Documentation/Intel/SoC/soc.html b/Documentation/Intel/SoC/soc.html index 147b0a1a8e..d91166fd2c 100644 --- a/Documentation/Intel/SoC/soc.html +++ b/Documentation/Intel/SoC/soc.html @@ -39,7 +39,7 @@ <hr> -<h1><a name="RequiredFiles">Required Files</a></h1> +<h2><a name="RequiredFiles">Required Files</a></h2> <p> Create the directory as src/soc/<Vendor>/<Chip Family>. </p> @@ -69,13 +69,13 @@ <hr> -<h1><a name="Descriptor">Start Booting</a></h1> +<h2><a name="Descriptor">Start Booting</a></h2> <p> Some SoC parts require additional firmware components in the flash. This section describes how to add those pieces. </p> -<h2>Intel Firmware Descriptor</h2> +<h3>Intel Firmware Descriptor</h3> <p> The Intel Firmware Descriptor (IFD) is located at the base of the flash part. The following command overwrites the base of the flash image with the Intel @@ -84,7 +84,7 @@ <pre><code>dd if=descriptor.bin of=build/coreboot.rom conv=notrunc >/dev/null 2>&1</code></pre> -<h2><a name="MEB">Management Engine Binary</a></h2> +<h3><a name="MEB">Management Engine Binary</a></h3> <p> Some SoC parts contain and require that the Management Engine (ME) be running before it is possible to bring the x86 processor out of reset. A binary file @@ -96,14 +96,14 @@ mv build/coreboot.rom.new build/coreboot.rom </code></pre> -<h2><a name="EarlyDebug">Early Debug</a></h2> +<h3><a name="EarlyDebug">Early Debug</a></h3> <p> Early debugging between the reset vector and the time the serial port is enabled is most easily done by writing values to port 0x80. </p> -<h2>Success</h2> +<h3>Success</h3> <p> When the reset vector is successfully invoked, port 0x80 will output the following value: </p> @@ -118,7 +118,7 @@ mv build/coreboot.rom.new build/coreboot.rom <hr> -<h1><a name="Bootblock">Bootblock</a></h1> +<h2><a name="Bootblock">Bootblock</a></h2> <p> Implement the bootblock using the following steps: </p> @@ -213,7 +213,7 @@ mv build/coreboot.rom.new build/coreboot.rom <hr> -<h1><a name="TempRamInit">TempRamInit</a></h1> +<h2><a name="TempRamInit">TempRamInit</a></h2> <p> Enable the call to TempRamInit in two stages: </p> @@ -223,7 +223,7 @@ mv build/coreboot.rom.new build/coreboot.rom </ol> -<h2>Find FSP Binary</h2> +<h3>Find FSP Binary</h3> <p> Use the following steps to locate the FSP binary: </p> @@ -267,7 +267,7 @@ Use the following steps to locate the FSP binary: </ol> -<h2>Calling TempRamInit</h2> +<h3>Calling TempRamInit</h3> <p> Use the following steps to debug the call to TempRamInit: </p> @@ -301,9 +301,9 @@ Use the following steps to debug the call to TempRamInit: <hr> -<h1><a name="Romstage">Romstage</a></h1> +<h2><a name="Romstage">Romstage</a></h2> -<h2><a name="SerialOutput">Serial Output</a></h2> +<h3><a name="SerialOutput">Serial Output</a></h3> <p> The following steps add the serial output support for romstage: </p> @@ -339,7 +339,7 @@ Use the following steps to debug the call to TempRamInit: </ol> -<h2><a name="PreviousSleepState">Determine Previous Sleep State</a></h2> +<h3><a name="PreviousSleepState">Determine Previous Sleep State</a></h3> <p> The following steps implement the code to get the previous sleep state: </p> @@ -362,7 +362,7 @@ Use the following steps to debug the call to TempRamInit: </ol> -<h2><a name="MemoryInit">MemoryInit Support</a></h2> +<h3><a name="MemoryInit">MemoryInit Support</a></h3> <p> The following steps implement the code to support the FSP MemoryInit call: </p> @@ -390,7 +390,7 @@ Use the following steps to debug the call to TempRamInit: </ol> -<h2><a name="DisableShadowRom">Disable Shadow ROM</a></h2> +<h3><a name="DisableShadowRom">Disable Shadow ROM</a></h3> <p> A shadow of the SPI flash part is mapped from 0x000e0000 to 0x000fffff. This shadow needs to be disabled to allow RAM to properly respond to @@ -402,9 +402,9 @@ Use the following steps to debug the call to TempRamInit: <hr> -<h1><a name="Ramstage">Ramstage</a></h1> +<h2><a name="Ramstage">Ramstage</a></h2> -<h2><a name="DeviceTree">Start Device Tree Processing</a></h2> +<h3><a name="DeviceTree">Start Device Tree Processing</a></h3> <p> The src/mainboard/<Vendor>/<Board>/devicetree.cb file drives the execution during ramstage. This file is processed by the util/sconfig utility @@ -417,7 +417,7 @@ Use the following steps to debug the call to TempRamInit: state of the state machine. </p> -<h3><a name="ChipOperations">Chip Operations</a></h3> +<h4><a name="ChipOperations">Chip Operations</a></h4> <p> Kick-starting the ramstage state machine requires creating the operation table for the chip listed in devicetree.cb: @@ -437,7 +437,7 @@ Use the following steps to debug the call to TempRamInit: <li>Edit src/soc/<SoC Vendor>/<SoC Family>/Makefile.inc and add chip.c to ramstage</li> </ol> -<h3>Domain Operations</h3> +<h4>Domain Operations</h4> <p> coreboot uses the domain operation table to initiate operations on all of the devices in the domain. By default coreboot enables all PCI devices which it @@ -482,7 +482,7 @@ Use the following steps to debug the call to TempRamInit: </ol> -<h2><a name="DeviceDrivers">PCI Device Drivers</a></h2> +<h3><a name="DeviceDrivers">PCI Device Drivers</a></h3> <p> PCI device drivers consist of a ".c" file which contains a "pci_driver" data structure at the end of the file with the attribute tag "__pci_driver". This @@ -509,7 +509,7 @@ Use the following steps to debug the call to TempRamInit: </li> </ol> -<h3><a name="SubsystemIds">Subsystem IDs</a></h3> +<h4><a name="SubsystemIds">Subsystem IDs</a></h4> <p> PCI subsystem IDs are assigned during the BS_DEV_ENABLE state. The device driver may use the common mechanism to assign subsystem IDs by adding @@ -534,7 +534,7 @@ Use the following steps to debug the call to TempRamInit: -<h2>Set up the <a name="MemoryMap">Memory Map</a></h2> +<h3>Set up the <a name="MemoryMap">Memory Map</a></h3> <p> The memory map is built by the various PCI device drivers during the BS_DEV_RESOURCES state of ramstage. The northcluster driver will typically @@ -571,12 +571,12 @@ Use the following steps to debug the call to TempRamInit: <hr> -<h1><a name="AcpiTables">ACPI Tables</a></h1> +<h2><a name="AcpiTables">ACPI Tables</a></h2> <p> One of the payloads that needs ACPI tables is the EDK2 <a target="_blank" href="quark.html#CorebootPayloadPkg">CorebootPayloadPkg</a>. </p> -<h2>FADT</h2> +<h3>FADT</h3> <p> The EDK2 module CorebootModulePkg/Library/CbParseLib/<a target="_blank" href="https://github.com/tianocore/edk2/blob/master/CorebootModulePkg/Library/CbParseLib/CbParseLib.c#l450">CbParseLib.c</a> @@ -679,7 +679,7 @@ Use the following steps to debug the call to TempRamInit: <hr> -<h1><a name="LegacyHardware">Legacy Hardware</a></h1> +<h2><a name="LegacyHardware">Legacy Hardware</a></h2> <p> One of the payloads that needs legacy hardare is the EDK2 <a target="_blank" href="quark.html#CorebootPayloadPkg">CorebootPayloadPkg</a>. </p> @@ -731,4 +731,4 @@ Use the following steps to debug the call to TempRamInit: <hr> <p>Modified: 4 March 2016</p> </body> -</html>
\ No newline at end of file +</html> diff --git a/Documentation/Intel/fsp1_1.html b/Documentation/Intel/fsp1_1.html index 1e1e88fcb3..94cb6bf8be 100644 --- a/Documentation/Intel/fsp1_1.html +++ b/Documentation/Intel/fsp1_1.html @@ -5,7 +5,9 @@ </head> <body> -<h1>x86 FSP 1.1 Integration</h1> +<h1>FSP 1.1</h1> + +<h2>x86 FSP 1.1 Integration</h2> <p> Firmware Support Package (FSP) integration requires System-on-a-Chip (SoC) and board support. The combined steps are listed @@ -26,8 +28,8 @@ </ul> <hr> -<h1><a name="RequiredFiles">Required Files</a></h1> -<h2><a name="corebootRequiredFiles">coreboot Required Files</a></h2> +<h2><a name="RequiredFiles">Required Files</a></h2> +<h3><a name="corebootRequiredFiles">coreboot Required Files</a></h3> <ol> <li>Create the following directories if they do not already exist: <ul> @@ -47,7 +49,7 @@ <hr> -<h1><a name="FspBinary">Add the FSP Binary File to coreboot File System</a></h1> +<h2><a name="FspBinary">Add the FSP Binary File to coreboot File System</a></h2> <p> Add the FSP binary to the coreboot flash image using the following command: </p> @@ -59,7 +61,7 @@ <hr> -<h1><a name="corebootFspDebugging">Enable coreboot/FSP Debugging</a></h1> +<h2><a name="corebootFspDebugging">Enable coreboot/FSP Debugging</a></h2> <p> Set the following Kconfig values: </p> diff --git a/Documentation/Intel/index.html b/Documentation/Intel/index.html index b2e826d590..b4daa960a9 100644 --- a/Documentation/Intel/index.html +++ b/Documentation/Intel/index.html @@ -5,15 +5,15 @@ </head> <body> -<h1>Intel® x86 Boards</h1> +<h1>Intel® x86</h1> + +<h2>Intel® x86 Boards</h2> <ul> <li><a target="_blank" href="Board/galileo.html">Galileo</a></li> <li><a target="_blank" href="http://wiki.minnowboard.org/Coreboot">MinnowBoard MAX</a></li> </ul> - - -<h1>Intel® x86 SoCs</h1> +<h2>Intel® x86 SoCs</h2> <ul> <li><a target="_blank" href="SoC/quark.html">Quark™</a></li> </ul> @@ -21,7 +21,7 @@ <hr> -<h1>x86 coreboot Development</h1> +<h2>x86 coreboot Development</h2> <ul> <li>Get the <a target="_blank" href="https://www.coreboot.org/Git">coreboot source</li> <li><a target="_blank" href="development.html">Overall</a> development</li> @@ -35,7 +35,7 @@ <hr> -<h1>Payload Development</h1> +<h2>Payload Development</h2> <ul> <li><a target="_blank" href="SoC/quark.html#CorebootPayloadPkg">CorebootPayloadPkg</a> <ul> @@ -50,13 +50,13 @@ <hr> -<h1><a name="Documentation">Documentation</a></h1> +<h2><a name="Documentation">Documentation</a></h2> <ul> <li>Intel® 64 and IA-32 Architectures <a target="_blank" href="http://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-manual-325462.pdf">Software Developer Manual</a></li> <li><a target="_blank" href="http://www.uefi.org/specifications">UEFI Specifications</a></li> </ul> -<h2><a name="Edk2Documentation">EDK-II Documentation</a></h2> +<h3><a name="Edk2Documentation">EDK-II Documentation</a></h3> <ul> <li>Build <a target="_blank" href="https://github.com/tianocore-docs/Docs/raw/master/Specifications/Build_Spec_1_26.pdf">V1.26</a></li> <li>Coding Standards <a target="_blank" href="https://github.com/tianocore-docs/Docs/raw/master/Specifications/CCS_2_1_Draft.pdf">V2.1</a></li> @@ -71,14 +71,14 @@ <li>VRF <a target="_blank" href="https://github.com/tianocore-docs/Docs/raw/master/Specifications/VFR_1_9.pdf">V1.9</a></li> </ul> -<h2><a name="FspDocumentation">FSP Documentation</a></h2> +<h3><a name="FspDocumentation">FSP Documentation</a></h3> <ul> <li>Intel® Firmware Support Package External Architecture Specification <a target="_blank" href="http://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/fsp-architecture-spec-v2.pdf">V2.0</a></li> <li>Intel® Firmware Support Package External Architecture Specification <a target="_blank" href="http://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/fsp-architecture-spec-v1-1.pdf">V1.1</a></li> <li>Intel® Firmware Support Package External Architecture Specification <a target="_blank" href="http://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/fsp-architecture-spec.pdf">V1.0</a></li> </ul> -<h2><a name="FeatureDocumentation">Feature Documentation</a></h2> +<h3><a name="FeatureDocumentation">Feature Documentation</a></h3> <table border="1"> <tr bgcolor="#c0ffc0"><th>Feature/Specification</th><th>Linux View/Test</th><th>EDK-II View/Test</th></tr> <tr> diff --git a/Documentation/Intel/vboot.html b/Documentation/Intel/vboot.html index 3a92989317..ca49ac2e2d 100644 --- a/Documentation/Intel/vboot.html +++ b/Documentation/Intel/vboot.html @@ -24,7 +24,7 @@ Google's vboot verifies the firmware and places measurements within the TPM. <hr> -<h1>Root of Trust</h1> +<h2>Root of Trust</h2> <p> When using vboot, the root-of-trust is basically the read-only portion of the SPI flash. The following items factor into the trust equation: @@ -57,7 +57,7 @@ flash maintains the manufactured state during the system's lifetime. </p> <hr> -<h1>Firmware Layout</h1> +<h2>Firmware Layout</h2> <p> Several sections are added to the firmware layout to support vboot: </p> @@ -71,7 +71,7 @@ Several sections are added to the firmware layout to support vboot: The following sections describe the various portions of the flash layout. </p> -<h2>Read-Only Section</h2> +<h3>Read-Only Section</h3> <p> The read-only section contains a coreboot file system (CBFS) that contains all of the boot firmware necessary to perform recovery for the system. This @@ -87,14 +87,14 @@ size and must cover the entire read-only section which consists of: <li>coreboot file system containing read-only recovery firmware</li> </ul> -<h2>Google Binary Blob (GBB) Area</h2> +<h3>Google Binary Blob (GBB) Area</h3> <p> The GBB area is part of the read-only section. This area contains a 4096 or 8192 bit public root RSA key that is used to verify the VBLOCK area to obtain the firmware signing key. </p> -<h2>Recovery Firmware</h2> +<h3>Recovery Firmware</h3> <p> The recovery firmware is contained within a coreboot file system and consists of: @@ -129,7 +129,7 @@ SPI flash device to boot the system. </p> -<h2>Read/Write Section</h2> +<h3>Read/Write Section</h3> <p> The read/write sections contain an area which contains the firmware signing @@ -158,7 +158,7 @@ These files also produce the tables which get passed to the operating system. </p> <hr> -<h1>Firmware Updates</h1> +<h2>Firmware Updates</h2> <p> The read/write sections exist in one of three states: </p> @@ -208,7 +208,7 @@ gets corrupted. </p> <hr> -<h1>Build Flags</h1> +<h2>Build Flags</h2> <p> The following Kconfig values need to be selected to enable vboot: </p> @@ -255,7 +255,7 @@ systems in FW_MAIN_A and FW_MAIN_B. </p> <hr> -<h1>Signing the coreboot Image</h1> +<h2>Signing the coreboot Image</h2> <p> The following command script is an example of how to sign the coreboot image file. This script is used on the Intel Galileo board and creates the GBB area and @@ -341,7 +341,7 @@ gbb_utility \ </code></pre> <hr> -<h1>Boot Flow</h1> +<h2>Boot Flow</h2> <p> The reset vector exist in the read-only area and points to the bootblock entry point. The only copy of the bootblock exists in the read-only area of the SPI @@ -367,7 +367,7 @@ not valid vboot falls back to the read-only area to boot into system recovery. </p> <hr> -<h1>Chromebook Special Features</h1> +<h2>Chromebook Special Features</h2> <p> Google's Chromebooks have some special features: </p> @@ -376,7 +376,7 @@ Google's Chromebooks have some special features: <li>Write-protect screw</li> </ul> -<h2>Developer Mode</h2> +<h3>Developer Mode</h3> <p> Developer mode allows the user to use coreboot to boot another operating system. This may be a another (beta) version of Chrome OS, or another flavor of @@ -386,7 +386,7 @@ This prevents someone from entering developer mode to subvert the system security to access files on the local system or cloud. </p> -<h2>Write Protect Screw</h2> +<h3>Write Protect Screw</h3> <p> Chromebooks have a write-protect screw which provides the ground to the write-protect pin of the SPI flash. Google specifically did this to allow |