On 6/24/20 3:34 PM, Sami Mujawar wrote:
> The PlatformPeim() in the PlatformPeiLib is invoked
> by the PrePiMain() and provides the platform an
> opportunity to setup the plaform specific HOBs.
>
> This PlatfromPeiLib initialises the Kvmtool platform
> HOBs like the Fdt, 16550BaseAddress, etc.
>
> Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
> ---
> ArmVirtPkg/Library/KvmtoolPlatformPeiLib/KvmtoolPlatformPeiLib.c | 78 ++++++++++++++++++++
> ArmVirtPkg/Library/KvmtoolPlatformPeiLib/KvmtoolPlatformPeiLib.inf | 48 ++++++++++++
> 2 files changed, 126 insertions(+)
>
> diff --git a/ArmVirtPkg/Library/KvmtoolPlatformPeiLib/KvmtoolPlatformPeiLib.c b/ArmVirtPkg/Library/KvmtoolPlatformPeiLib/KvmtoolPlatformPeiLib.c
> new file mode 100644
> index 0000000000000000000000000000000000000000..a97b31537fbc8071eed030f912ade60de3945356
> --- /dev/null
> +++ b/ArmVirtPkg/Library/KvmtoolPlatformPeiLib/KvmtoolPlatformPeiLib.c
> @@ -0,0 +1,78 @@
> +/** @file
> +*
> +* Copyright (c) 2020, ARM Limited. All rights reserved.
> +*
> +* SPDX-License-Identifier: BSD-2-Clause-Patent
> +*
> +**/
> +
> +#include <PiPei.h>
> +
> +#include <Guid/Early16550UartBaseAddress.h>
> +#include <Guid/FdtHob.h>
> +
> +#include <Library/MemoryAllocationLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/HobLib.h>
> +#include <Library/PcdLib.h>
> +#include <Library/PeiServicesLib.h>
> +#include <libfdt.h>
> +
> +/** Initialise Platform HOBs
> +
> + @retval EFI_SUCCESS Success.
> + @retval EFI_INVALID_PARAMETER A parameter is invalid.
> + @retval EFI_OUT_OF_RESOURCES Out of resources.
> +**/
> +EFI_STATUS
> +EFIAPI
> +PlatformPeim (
> + VOID
> + )
> +{
> + VOID *Base;
> + VOID *NewBase;
> + UINTN FdtSize;
> + UINTN FdtPages;
> + UINT64 *FdtHobData;
> + UINT64 *UartHobData;
> +
> + Base = (VOID*)(UINTN)PcdGet64 (PcdDeviceTreeInitialBaseAddress);
> + if ((Base == NULL) || (fdt_check_header (Base) != 0)) {
> + ASSERT (0);
> + return EFI_INVALID_PARAMETER;
> + }
> +
> + FdtSize = fdt_totalsize (Base) + PcdGet32 (PcdDeviceTreeAllocationPadding);
> + FdtPages = EFI_SIZE_TO_PAGES (FdtSize);
> + NewBase = AllocatePages (FdtPages);
> + if (NewBase == NULL) {
> + ASSERT (0);
> + return EFI_OUT_OF_RESOURCES;
> + }
> +
> + fdt_open_into (Base, NewBase, EFI_PAGES_TO_SIZE (FdtPages));
> +
> + FdtHobData = BuildGuidHob (&gFdtHobGuid, sizeof (*FdtHobData));
> + if (FdtHobData == NULL) {
> + ASSERT (0);
> + return EFI_OUT_OF_RESOURCES;
> + }
> +
> + *FdtHobData = (UINTN)NewBase;
> +
> + UartHobData = BuildGuidHob (
> + &gEarly16550UartBaseAddressGuid,
> + sizeof (*UartHobData)
> + );
> + if (UartHobData == NULL) {
> + ASSERT (0);
> + return EFI_OUT_OF_RESOURCES;
> + }
> +
> + *UartHobData = PcdGet64 (PcdSerialRegisterBase);
> +
> + BuildFvHob (PcdGet64 (PcdFvBaseAddress), PcdGet32 (PcdFvSize));
> +
> + return EFI_SUCCESS;
> +}
> diff --git a/ArmVirtPkg/Library/KvmtoolPlatformPeiLib/KvmtoolPlatformPeiLib.inf b/ArmVirtPkg/Library/KvmtoolPlatformPeiLib/KvmtoolPlatformPeiLib.inf
> new file mode 100644
> index 0000000000000000000000000000000000000000..9f44b8885d3c131de1d41ac6947bd9218cfdf3e7
> --- /dev/null
> +++ b/ArmVirtPkg/Library/KvmtoolPlatformPeiLib/KvmtoolPlatformPeiLib.inf
> @@ -0,0 +1,48 @@
> +#/** @file
> +#
> +# Copyright (c) 2020, ARM Limited. All rights reserved.
> +#
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#**/
> +
> +[Defines]
> + INF_VERSION = 0x0001001B
> + BASE_NAME = PlatformPeiLib
> + FILE_GUID = 21073FB3-BA6F-43EB-83F0-4A840C648165
> + MODULE_TYPE = BASE
> + VERSION_STRING = 1.0
> + LIBRARY_CLASS = KvmtoolPlatformPeiLib
> +
> +[Sources]
> + KvmtoolPlatformPeiLib.c
> +
> +[Packages]
> + ArmPkg/ArmPkg.dec
> + ArmVirtPkg/ArmVirtPkg.dec
> + EmbeddedPkg/EmbeddedPkg.dec
> + MdeModulePkg/MdeModulePkg.dec
> + MdePkg/MdePkg.dec
> +
> +[LibraryClasses]
> + DebugLib
> + HobLib
> + FdtLib
> + PcdLib
> + PeiServicesLib
> +
> +[FixedPcd]
> + gArmTokenSpaceGuid.PcdFvSize
> + gArmVirtTokenSpaceGuid.PcdDeviceTreeAllocationPadding
> +
> +[Pcd]
> + gArmTokenSpaceGuid.PcdFvBaseAddress
> + gArmVirtTokenSpaceGuid.PcdDeviceTreeInitialBaseAddress
> + gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterBase
> +
> +[Guids]
> + gFdtHobGuid
> + gEarly16550UartBaseAddressGuid
> +
> +[Depex]
> + gEfiPeiMemoryDiscoveredPpiGuid
>
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