[edk2-devel] [PATCH 1/1] Platform/RaspberryPi: Setup option for disabling Fast Boot

Sunny Wang Sunny.Wang at arm.com
Tue Apr 13 07:22:23 UTC 2021


It looks like "base64" would cause a display issue with https://edk2.groups.io/g/devel/message/74011, so I re-sent v2 with the default "8bit" setting. So far, "8bit" seems working fine.

Best Regards,
Sunny Wang

-----Original Message-----
From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of Sunny Wang via groups.io
Sent: Tuesday, April 13, 2021 2:02 PM
To: Ard Biesheuvel <ardb at kernel.org>; Pete Batard <pete at akeo.ie>
Cc: edk2-devel-groups-io <devel at edk2.groups.io>; Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud at arm.com>; Jeremy Linton <Jeremy.Linton at arm.com>; Ard Biesheuvel <ardb+tianocore at kernel.org>; Sunny Wang <Sunny.Wang at arm.com>
Subject: Re: [edk2-devel] [PATCH 1/1] Platform/RaspberryPi: Setup option for disabling Fast Boot

Thanks, Ard.
I checked and fixed Windows whitespace damage in v2. If you still see the issue, feel free to let me know.
The issue was caused by my git transfer encoding setting. It was somehow using "quoted-printable". Then, I used "--transfer-encoding=" to override the setting to "base64". Now the issue seems to be resolved.

Best Regards,
Sunny Wang

-----Original Message-----
From: Ard Biesheuvel <ardb at kernel.org>
Sent: Tuesday, April 13, 2021 1:27 AM
To: Pete Batard <pete at akeo.ie>
Cc: Sunny Wang <Sunny.Wang at arm.com>; edk2-devel-groups-io <devel at edk2.groups.io>; Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud at arm.com>; Jeremy Linton <Jeremy.Linton at arm.com>; Ard Biesheuvel <ardb+tianocore at kernel.org>
Subject: Re: [PATCH 1/1] Platform/RaspberryPi: Setup option for disabling Fast Boot

On Mon, 12 Apr 2021 at 15:03, Pete Batard <pete at akeo.ie> wrote:
>
> Hi Sunny,
>
> Functionaly, I see no issues with this patch, and it's indeed a good
> solution to the problem of trying to satisfy everyone while fixing the
> issues we are seeing.
>
> There are however a few minor typos and whitespace issues, that I'm
> detailing below. So could you please send a v2 to address these?
>

Agree with Pete. Thanks for providing a fix for this, and please incorporate the changes suggested by Pete.

Then, could we *please* figure out a way to get this patch on the mailing list without Windows whitespace damage? Not sure if anything changed recently, but not a single EDK2 patch has arrived in my mailbox recently in a form that I could apply with 'git am'.

Thanks,
Ard.


> On 2021.04.12 10:05, Sunny Wang wrote:
> > This is a fix for https://github.com/pftf/RPi4/issues/114.
> >
> > Changes:
> >    1. Add a setup option called Boot Policy and consume the setting
> >       during boot to whether perform or skip ConnectAll.
> >    2. The Default setting is set to Full discovery because it is not
> >       worth enabling Fast boot by default on RaspberryPi systems.
> >       Enabling it just saves boot time about 1 second, but caused a
> >       lot of issues.
> >
> > Testing Done:
> >    - Booted to Standalone UEFI shell on SD card and use drivers
> >      command to check the result with Fast Boot and Full discovery
> >      settings. Then, child/device handles are created as expected.
> >
> > Note and to-do items:
> >    - The root cause looks like that boot loaders and some tools like
> >      grub and iPXE haven't supported selective connect/Fast boot.
> >      However, system firmware should still provide a setup option for
> >      user to enable Fast boot with old version boot loaders and tools
> >      , which is why we proposed this change. We will also report this
> >      issue to boot loader and tool vendors/open source GitHubs.
> >    - We Will add more options for connecting specific type devices so
> >      that we can still have the shortest boot time for all use cases.
> >
> > Cc: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud at arm.com>
> > Cc: Jeremy Linton <jeremy.linton at arm.com>
> > Cc: Pete Batard <pete at akeo.ie>
> > Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
> > Signed-off-by: Sunny Wang <sunny.wang at arm.com>
> > ---
> >   .../RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c    | 11 ++++++++++-
> >   .../RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf  |  3 ++-
> >   .../Drivers/ConfigDxe/ConfigDxeHii.uni           | 10 +++++++++-
> >   .../Drivers/ConfigDxe/ConfigDxeHii.vfr           | 15 ++++++++++++++-
> >   Platform/RaspberryPi/Include/ConfigVars.h        | 12 +++++++++++-
> >   .../Library/PlatformBootManagerLib/PlatformBm.c  | 16 ++++++++++++++--
> >   .../PlatformBootManagerLib.inf                   |  1 +
> >   Platform/RaspberryPi/RPi3/RPi3.dsc               | 10 +++++++++-
> >   Platform/RaspberryPi/RPi4/RPi4.dsc               |  9 ++++++++-
> >   Platform/RaspberryPi/RaspberryPi.dec             |  2 ++
> >   10 files changed, 80 insertions(+), 9 deletions(-)
> >
> > diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
> > b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
> > index 22f86d4d44..d3c5869949 100644
> > --- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
> > +++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
> > @@ -1,6 +1,6 @@
> >   /** @file
> >
> >    *
> >
> > - *  Copyright (c) 2019 - 2020, ARM Limited. All rights reserved.
> >
> > + *  Copyright (c) 2019 - 2021, ARM Limited. All rights reserved.
> >
> >    *  Copyright (c) 2018 - 2020, Andrei Warkentin
> > <andrey.warkentin at gmail.com>
> >
> >    *
> >
> >    *  SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> > @@ -281,6 +281,15 @@ SetupVariables (
> >                       );
> >
> >     }
> >
> >
> >
> > +  Size = sizeof (UINT32);
> >
> > +  Status = gRT->GetVariable (L"BootPolicy",
> >
> > +                  &gConfigDxeFormSetGuid,
> >
> > +                  NULL, &Size, &Var32);
> >
> > +  if (EFI_ERROR (Status)) {
> >
> > +    Status = PcdSet32S (PcdBootPolicy, PcdGet32 (PcdBootPolicy));
> >
> > +    ASSERT_EFI_ERROR (Status);
> >
> > +  }
> >
> > +
> >
> >     Size = sizeof (UINT32);
> >
> >     Status = gRT->GetVariable (L"SdIsArasan",
> >
> >                     &gConfigDxeFormSetGuid,
> >
> > diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
> > b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
> > index d51e54e010..032e40b0c3 100644
> > --- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
> > +++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
> > @@ -2,7 +2,7 @@
> >   #
> >
> >   #  Component description file for the RasbperryPi DXE platform config driver.
> >
> >   #
> >
> > -#  Copyright (c) 2019 - 2020, ARM Limited. All rights reserved.
> >
> > +#  Copyright (c) 2019 - 2021, ARM Limited. All rights reserved.
> >
> >   #  Copyright (c) 2018 - 2020, Andrei Warkentin
> > <andrey.warkentin at gmail.com>
> >
> >   #
> >
> >   #  SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> > @@ -93,6 +93,7 @@
> >     gRaspberryPiTokenSpaceGuid.PcdRamLimitTo3GB
> >
> >     gRaspberryPiTokenSpaceGuid.PcdFanOnGpio
> >
> >     gRaspberryPiTokenSpaceGuid.PcdFanTemp
> >
> > +  gRaspberryPiTokenSpaceGuid.PcdBootPolicy
> >
> >
> >
> >   [Depex]
> >
> >     gPcdProtocolGuid AND gRaspberryPiFirmwareProtocolGuid
> >
> > diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
> > b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
> > index 466fa852cb..7b14fdf39f 100644
> > --- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
> > +++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
> > @@ -1,7 +1,7 @@
> >   /** @file
> >
> >    *
> >
> >    *  Copyright (c) 2018, Andrei Warkentin
> > <andrey.warkentin at gmail.com>
> >
> > - *  Copyright (c) 2020, ARM Limited. All rights reserved.
> >
> > + *  Copyright (c) 2020 - 2021, ARM Limited. All rights reserved.
> >
> >    *
> >
> >    *  SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> >    *
> >
> > @@ -60,6 +60,14 @@
> >   #string STR_ADVANCED_ASSET_TAG_PROMPT #language en-US "Asset Tag"
> >
> >   #string STR_ADVANCED_ASSET_TAG_HELP   #language en-US "Set the system Asset Tag"
> >
> >
>
> Personally, I would move the Boot Policy section between "System Table
> Selection" and "ACPI Fan Control" if we try to keep the advanced
> settings in the order we think they will be most used.
>
> >
> > +#string STR_BOOT_POLICY_PROMPT        #language en-US "Boot Policy"
> >
> > +#string STR_BOOT_POLICY_HELP          #language en-US "When Fast Boot is selected, only required devices will be discoverd for reducing "
>
> "discoverd" -> "discovered"
>
> >
> > +                                                      "the boot time."
>
> Missing a space after "the boot time.". It should be "the boot time.
> ", else the help text will display as "(...) the boot time.When Full
> Discovery (...)"
>
> >
> > +                                                      "When Full Discovery is selected, all the devices will be discoverd for some "
>
> "discoverd" -> "discovered"
>
> >
> > +                                                      "scenarios such as system deployement and diagnostic tests"
>
> "deployement" -> "deployment"
>
> >
> > +#string STR_FAST_BOOT                 #language en-US "Fast Boot"
> >
> > +#string STR_FULL_DISCOVERY            #language en-US "Full Discovery"
> >
> > +
> >
> >   /*
> >
> >    * MMC/SD configuration.
> >
> >    */
> >
> > diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
> > b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
> > index cc7a09cfb7..5dc558ec08 100644
> > --- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
> > +++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
> > @@ -1,7 +1,7 @@
> >   /** @file
> >
> >    *
> >
> >    *  Copyright (c) 2018 Andrei Warkentin
> > <andrey.warkentin at gmail.com>
> >
> > - *  Copyright (c) 2020, ARM Limited. All rights reserved.
> >
> > + *  Copyright (c) 2020 - 2021, ARM Limited. All rights reserved.
> >
> >    *
> >
> >    *  SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> >    *
> >
> > @@ -116,6 +116,11 @@ formset
> >         name  = DisplayEnableSShot,
> >
> >         guid  = CONFIGDXE_FORM_SET_GUID;
> >
> >
> >
> > +    efivarstore BOOT_POLICY_VARSTORE_DATA,
> >
> > +      attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS |
> > + EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
> >
> > +      name  = BootPolicy,
> >
> > +      guid  = CONFIGDXE_FORM_SET_GUID;
> >
> > +
> >
> >       form formid = 1,
> >
> >           title  = STRING_TOKEN(STR_FORM_SET_TITLE);
> >
> >           subtitle text = STRING_TOKEN(STR_NULL_STRING);
> >
> > @@ -220,6 +225,14 @@ formset
> >               minsize = 0,
> >
> >               maxsize = ASSET_TAG_STR_MAX_LEN,
> >
> >           endstring;
> >
> > +
> >
> > +        oneof varid = BootPolicy.BootPolicy,
> >
> > +            prompt      = STRING_TOKEN(STR_BOOT_POLICY_PROMPT),
> >
> > +            help        = STRING_TOKEN(STR_BOOT_POLICY_HELP),
> >
> > +            flags       = NUMERIC_SIZE_4 | INTERACTIVE | RESET_REQUIRED,
> >
> > +            option text = STRING_TOKEN(STR_FAST_BOOT ), value =
> > + FAST_BOOT , flags = 0;
>
> "STRING_TOKEN(STR_FAST_BOOT )" -> "STRING_TOKEN(STR_FAST_BOOT)"
>
> >
> > +            option text = STRING_TOKEN(STR_FULL_DISCOVERY), value =
> > + FULL_DISCOVERY, flags = DEFAULT;
> >
> > +        endoneof;
> >
> >       endform;
> >
> >
> >
> >       form formid = 0x1003,
> >
> > diff --git a/Platform/RaspberryPi/Include/ConfigVars.h
> > b/Platform/RaspberryPi/Include/ConfigVars.h
> > index 142317985a..3347f899df 100644
> > --- a/Platform/RaspberryPi/Include/ConfigVars.h
> > +++ b/Platform/RaspberryPi/Include/ConfigVars.h
> > @@ -1,7 +1,7 @@
> >   /** @file
> >
> >    *
> >
> >    *  Copyright (c) 2020, Andrei Warkentin
> > <andrey.warkentin at gmail.com>
> >
> > - *  Copyright (c) 2020, ARM Limited. All rights reserved.
> >
> > + *  Copyright (c) 2020 - 2021, ARM Limited. All rights reserved.
> >
> >    *
> >
> >    *  SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> >    *
> >
> > @@ -143,4 +143,14 @@ typedef struct {
> >     UINT32 EnableDma;
> >
> >   } MMC_EMMC_DMA_VARSTORE_DATA;
> >
> >
> >
> > +#define FAST_BOOT      0
> >
> > +#define FULL_DISCOVERY 1
> >
> > +typedef struct {
> >
> > +  /*
> >
> > +   * 0 - Fast Boot
> >
> > +   * 1 - Full Discovrey (Connect All)
>
> "Discovrey" -> "Discovery"
>
> >
> > +   */
> >
> > +  UINT32 BootPolicy;
> >
> > +} BOOT_POLICY_VARSTORE_DATA;
> >
> > +
> >
> >   #endif /* CONFIG_VARS_H */
> >
> > diff --git
> > a/Platform/RaspberryPi/Library/PlatformBootManagerLib/PlatformBm.c
> > b/Platform/RaspberryPi/Library/PlatformBootManagerLib/PlatformBm.c
> > index c2fc40b8ea..abbe4fb3d0 100644
> > ---
> > a/Platform/RaspberryPi/Library/PlatformBootManagerLib/PlatformBm.c
> > +++ b/Platform/RaspberryPi/Library/PlatformBootManagerLib/PlatformBm
> > +++ .c
> > @@ -4,7 +4,7 @@
> >    *  Copyright (c) 2017-2018, Andrei Warkentin
> > <andrey.warkentin at gmail.com>
> >
> >    *  Copyright (c) 2016, Linaro Ltd. All rights reserved.
> >
> >    *  Copyright (c) 2015-2016, Red Hat, Inc.
> >
> > - *  Copyright (c) 2014-2020, ARM Ltd. All rights reserved.
> >
> > + *  Copyright (c) 2014-2021, ARM Ltd. All rights reserved.
> >
> >    *  Copyright (c) 2004-2016, Intel Corporation. All rights reserved.
> >
> >    *
> >
> >    *  SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> > @@ -26,9 +26,11 @@
> >   #include <Guid/EventGroup.h>
> >
> >   #include <Guid/TtyTerm.h>
> >
> >
> >
> > +#include <ConfigVars.h>
>
> I'd remove the extra line between <Guid/TtyTerm.h> and <ConfigVars.h>
>
> >
> > +
> >
> >   #include "PlatformBm.h"
> >
> >
> >
> > -#define BOOT_PROMPT L"ESC (setup), F1 (shell), ENTER (boot)"
> >
> > +#define BOOT_PROMPT L"ESC (setup), F1 (shell), ENTER (boot)\n"
>
> Why are you adding the carriage return? Was there an issue with the
> display of this prompt?
>
> >
> >
> >
> >   #define DP_NODE_LEN(Type) { (UINT8)sizeof (Type), (UINT8)(sizeof
> > (Type) >> 8) }
> >
> >
> >
> > @@ -633,6 +635,16 @@ PlatformBootManagerAfterConsole (
> >       Print (BOOT_PROMPT);
> >
> >     }
> >
> >
> >
> > +  //
> >
> > +  // Connect the rest of the devices if the boot polcy is set to
> > + Full discovery
> >
> > +  //
> >
> > +  if (PcdGet32 (PcdBootPolicy) == FULL_DISCOVERY) {
> >
> > +    DEBUG ((DEBUG_INFO, "Boot Policy is Full Discovery. Connect All
> > + devices\n"));
>
> "All" -> "all"
>
> >
> > +    EfiBootManagerConnectAll ();
> >
> > +  } else if (PcdGet32 (PcdBootPolicy) == FAST_BOOT) {
> >
> > +    DEBUG ((DEBUG_INFO, "Boot Policy is Fast Boot. Skip connecting
> > + all devices\n"));
> >
> > +  }
> >
> > +
> >
> >     Status = gBS->LocateProtocol (&gEsrtManagementProtocolGuid,
> > NULL, (VOID**)&EsrtManagement);
> >
> >     if (!EFI_ERROR (Status)) {
> >
> >       EsrtManagement->SyncEsrtFmp ();
> >
> > diff --git
> > a/Platform/RaspberryPi/Library/PlatformBootManagerLib/PlatformBootMa
> > nagerLib.inf
> > b/Platform/RaspberryPi/Library/PlatformBootManagerLib/PlatformBootMa
> > nagerLib.inf
> > index 88f6f8fe09..fbf510ab96 100644
> > ---
> > a/Platform/RaspberryPi/Library/PlatformBootManagerLib/PlatformBootMa
> > nagerLib.inf
> > +++ b/Platform/RaspberryPi/Library/PlatformBootManagerLib/PlatformBo
> > +++ otManagerLib.inf
> > @@ -63,6 +63,7 @@
> >   [Pcd]
> >
> >     gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut
> >
> >     gRaspberryPiTokenSpaceGuid.PcdSdIsArasan
> >
> > +  gRaspberryPiTokenSpaceGuid.PcdBootPolicy
> >
> >
> >
> >   [Guids]
> >
> >     gEfiFileInfoGuid
> >
> > diff --git a/Platform/RaspberryPi/RPi3/RPi3.dsc
> > b/Platform/RaspberryPi/RPi3/RPi3.dsc
> > index 0961133ae9..ddb03e405f 100644
> > --- a/Platform/RaspberryPi/RPi3/RPi3.dsc
> > +++ b/Platform/RaspberryPi/RPi3/RPi3.dsc
> > @@ -1,6 +1,6 @@
> >   # @file
> >
> >   #
> >
> > -#  Copyright (c) 2011 - 2020, ARM Limited. All rights reserved.
> >
> > +#  Copyright (c) 2011 - 2021, ARM Limited. All rights reserved.
> >
> >   #  Copyright (c) 2014, Linaro Limited. All rights reserved.
> >
> >   #  Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.
> >
> >   #  Copyright (c) 2017 - 2018, Andrei Warkentin
> > <andrey.warkentin at gmail.com>
> >
> > @@ -512,6 +512,14 @@
> >
> > gRaspberryPiTokenSpaceGuid.PcdFanOnGpio|L"FanOnGpio"|gConfigDxeFormS
> > etGuid|0x0|0
> >
> >
> > gRaspberryPiTokenSpaceGuid.PcdFanTemp|L"FanTemp"|gConfigDxeFormSetGu
> > id|0x0|0
> >
> >
> >
> > +  #
> >
> > +  # Boot Policy
> >
> > +  # 0  - Fast Boot
> >
> > +  # 1  - Full Discovrey (Connect All)
>
> "Discovrey" -> "Discovery"
>
> >
> > +  #
> >
> > +
> > + gRaspberryPiTokenSpaceGuid.PcdBootPolicy|L"BootPolicy"|gConfigDxeF
> > + ormSetGuid|0x0|1
> >
> > +
> >
> > +
>
> Please remove the extra line. There should be just one blank like
> between the sections.
>
> >
> >     #
> >
> >     # Reset-related.
> >
> >     #
> >
> > diff --git a/Platform/RaspberryPi/RPi4/RPi4.dsc
> > b/Platform/RaspberryPi/RPi4/RPi4.dsc
> > index ff802d8347..8ee1922a44 100644
> > --- a/Platform/RaspberryPi/RPi4/RPi4.dsc
> > +++ b/Platform/RaspberryPi/RPi4/RPi4.dsc
> > @@ -1,6 +1,6 @@
> >   # @file
> >
> >   #
> >
> > -#  Copyright (c) 2011 - 2020, ARM Limited. All rights reserved.
> >
> > +#  Copyright (c) 2011 - 2021, ARM Limited. All rights reserved.
> >
> >   #  Copyright (c) 2017 - 2018, Andrei Warkentin
> > <andrey.warkentin at gmail.com>
> >
> >   #  Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.
> >
> >   #  Copyright (c) 2014, Linaro Limited. All rights reserved.
> >
> > @@ -528,6 +528,13 @@
> >
> > gRaspberryPiTokenSpaceGuid.PcdFanOnGpio|L"FanOnGpio"|gConfigDxeFormS
> > etGuid|0x0|0
> >
> >
> > gRaspberryPiTokenSpaceGuid.PcdFanTemp|L"FanTemp"|gConfigDxeFormSetGu
> > id|0x0|60
> >
> >
> >
> > +  #
> >
> > +  # Boot Policy
> >
> > +  # 0  - Fast Boot
> >
> > +  # 1  - Full Discovrey (Connect All)
>
> "Discovrey" -> "Discovery"
>
> Regards,
>
> /Pete
>
> >
> > +  #
> >
> > +
> > + gRaspberryPiTokenSpaceGuid.PcdBootPolicy|L"BootPolicy"|gConfigDxeF
> > + ormSetGuid|0x0|1
> >
> > +
> >
> >     #
> >
> >     # Reset-related.
> >
> >     #
> >
> > diff --git a/Platform/RaspberryPi/RaspberryPi.dec
> > b/Platform/RaspberryPi/RaspberryPi.dec
> > index 08135717ed..8eb1c2bac7 100644
> > --- a/Platform/RaspberryPi/RaspberryPi.dec
> > +++ b/Platform/RaspberryPi/RaspberryPi.dec
> > @@ -2,6 +2,7 @@
> >   #
> >
> >   #  Copyright (c) 2016, Linaro, Ltd. All rights reserved.
> >
> >   #  Copyright (c) 2017-2018, Andrei Warkentin
> > <andrey.warkentin at gmail.com>
> >
> > +#  Copyright (c) 2021, ARM Limited. All rights reserved.
> >
> >   #
> >
> >   #  SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> >   #
> >
> > @@ -70,3 +71,4 @@
> >     gRaspberryPiTokenSpaceGuid.PcdFanTemp|0|UINT32|0x0000001D
> >
> >
> > gRaspberryPiTokenSpaceGuid.PcdPlatformResetDelay|0|UINT32|0x0000001E
> >
> >     gRaspberryPiTokenSpaceGuid.PcdMmcEnableDma|0|UINT32|0x0000001F
> >
> > +  gRaspberryPiTokenSpaceGuid.PcdBootPolicy|0|UINT32|0x00000020
> >
>
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