On Fri, Mar 22, 2024 at 17:08:49 +0100, Marcin Juszkiewicz wrote:
> There is no need for EDK2 to know that there is DeviceTree around.
> All hardware information is read using functions from
> SbsaQemuHardwareInfoLib library.
>
> Signed-off-by: Marcin Juszkiewicz <marcin.juszkiew...@linaro.org>
Reviewed-by: Leif Lindholm <quic_llind...@quicinc.com>
/
Leif
> ---
> Silicon/Qemu/SbsaQemu/SbsaQemu.dec | 1 -
> Platform/Qemu/SbsaQemu/SbsaQemu.dsc | 6 --
> .../SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf | 33 -------
> Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h | 36 -------
> .../SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c | 2 -
> .../SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c | 98
> --------------------
> 6 files changed, 176 deletions(-)
>
> diff --git a/Silicon/Qemu/SbsaQemu/SbsaQemu.dec
> b/Silicon/Qemu/SbsaQemu/SbsaQemu.dec
> index 427ff8b31aac..8f3533800767 100644
> --- a/Silicon/Qemu/SbsaQemu/SbsaQemu.dec
> +++ b/Silicon/Qemu/SbsaQemu/SbsaQemu.dec
> @@ -36,7 +36,6 @@ [PcdsFixedAtBuild.common]
>
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformAhciSize|0x10000|UINT32|0x00000002
>
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformXhciBase|0|UINT64|0x00000003
>
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformXhciSize|0x10000|UINT32|0x00000004
> -
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdDeviceTreeBaseAddress|0x10000000000|UINT64|0x00000005
>
> # PCDs complementing PCIe layout pulled into ACPI tables
> # Limit = Base + Size - 1
> diff --git a/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
> b/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
> index 3c3d2449bff4..3d748e289b51 100644
> --- a/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
> +++ b/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
> @@ -80,7 +80,6 @@ [LibraryClasses.common]
> FileHandleLib|MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.inf
>
> ImagePropertiesRecordLib|MdeModulePkg/Library/ImagePropertiesRecordLib/ImagePropertiesRecordLib.inf
>
> - FdtLib|EmbeddedPkg/Library/FdtLib/FdtLib.inf
> UefiRuntimeLib|MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf
>
> OrderedCollectionLib|MdePkg/Library/BaseOrderedCollectionRedBlackTreeLib/BaseOrderedCollectionRedBlackTreeLib.inf
>
> @@ -126,7 +125,6 @@ [LibraryClasses.common]
> # ARM PL011 UART Driver
> PL011UartLib|ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf
>
> - FdtHelperLib|Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
> OemMiscLib|Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf
>
> HardwareInfoLib|Silicon/Qemu/SbsaQemu/Library/SbsaQemuHardwareInfoLib/SbsaQemuHardwareInfoLib.inf
>
> @@ -430,9 +428,6 @@ [PcdsFixedAtBuild.common]
> #
> gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize|16
>
> - # Initial Device Tree Location
> -
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdDeviceTreeBaseAddress|0x10000000000
> -
> # Non discoverable devices (AHCI,XHCI)
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformAhciBase|0x60100000
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformAhciSize|0x00010000
> @@ -731,7 +726,6 @@ [Components.common]
> #
> ArmPkg/Universal/Smbios/ProcessorSubClassDxe/ProcessorSubClassDxe.inf
> ArmPkg/Universal/Smbios/SmbiosMiscDxe/SmbiosMiscDxe.inf
> - EmbeddedPkg/Library/FdtLib/FdtLib.inf
> MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
> Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuSmbiosDxe/SbsaQemuSmbiosDxe.inf
>
> diff --git a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
> b/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
> deleted file mode 100644
> index 9c059f3e5851..000000000000
> --- a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
> +++ /dev/null
> @@ -1,33 +0,0 @@
> -#/** @file
> -#
> -# Component description file for FdtHelperLib module
> -#
> -# Copyright (c) 2021, NUVIA Inc. All rights reserved.
> -#
> -# SPDX-License-Identifier: BSD-2-Clause-Patent
> -#
> -#**/
> -
> -[Defines]
> - INF_VERSION = 1.29
> - BASE_NAME = FdtHelperLib
> - FILE_GUID = 34e4396f-c2fc-4f9e-ad58-0f98e99e3875
> - MODULE_TYPE = BASE
> - VERSION_STRING = 1.0
> - LIBRARY_CLASS = FdtHelperLib
> -
> -[Sources.common]
> - FdtHelperLib.c
> -
> -[Packages]
> - EmbeddedPkg/EmbeddedPkg.dec
> - MdePkg/MdePkg.dec
> - Silicon/Qemu/SbsaQemu/SbsaQemu.dec
> -
> -[LibraryClasses]
> - DebugLib
> - FdtLib
> - PcdLib
> -
> -[FixedPcd]
> - gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdDeviceTreeBaseAddress
> diff --git a/Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
> b/Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
> deleted file mode 100644
> index ea9159857215..000000000000
> --- a/Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
> +++ /dev/null
> @@ -1,36 +0,0 @@
> -/** @file
> -* FdtHelperLib.h
> -*
> -* Copyright (c) 2021, NUVIA Inc. All rights reserved.
> -*
> -* SPDX-License-Identifier: BSD-2-Clause-Patent
> -*
> -**/
> -
> -#ifndef FDT_HELPER_LIB_
> -#define FDT_HELPER_LIB_
> -
> -/**
> - Get MPIDR for a given cpu from device tree passed by Qemu.
> -
> - @param [in] CpuId Index of cpu to retrieve MPIDR value for.
> -
> - @retval MPIDR value of CPU at index <CpuId>
> -**/
> -UINT64
> -FdtHelperGetMpidr (
> - IN UINTN CpuId
> - );
> -
> -/** Walks through the Device Tree created by Qemu and counts the number
> - of CPUs present in it.
> -
> - @return The number of CPUs present.
> -**/
> -EFIAPI
> -UINT32
> -FdtHelperCountCpus (
> - VOID
> - );
> -
> -#endif /* FDT_HELPER_LIB_ */
> diff --git
> a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
> b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
> index 4ebbe7c93a19..56be2455970d 100644
> --- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
> +++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
> @@ -17,8 +17,6 @@
> #include <IndustryStandard/SbsaQemuSmc.h>
> #include <IndustryStandard/SbsaQemuPlatformVersion.h>
>
> -#include <Protocol/FdtClient.h>
> -
> EFI_STATUS
> EFIAPI
> InitializeSbsaQemuPlatformDxe (
> diff --git a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
> b/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
> deleted file mode 100644
> index 7fdfb055db76..000000000000
> --- a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
> +++ /dev/null
> @@ -1,98 +0,0 @@
> -/** @file
> -* FdtHelperLib.c
> -*
> -* Copyright (c) 2021, NUVIA Inc. All rights reserved.
> -* Copyright (c) 2020, Linaro Ltd. All rights reserved.
> -*
> -* SPDX-License-Identifier: BSD-2-Clause-Patent
> -*
> -**/
> -
> -#include <Uefi.h>
> -#include <Library/DebugLib.h>
> -#include <Library/FdtHelperLib.h>
> -#include <Library/PcdLib.h>
> -#include <libfdt.h>
> -
> -STATIC INT32 mFdtFirstCpuOffset;
> -STATIC INT32 mFdtCpuNodeSize;
> -
> -/**
> - Get MPIDR for a given cpu from device tree passed by Qemu.
> -
> - @param [in] CpuId Index of cpu to retrieve MPIDR value for.
> -
> - @retval MPIDR value of CPU at index <CpuId>
> -**/
> -UINT64
> -FdtHelperGetMpidr (
> - IN UINTN CpuId
> - )
> -{
> - VOID *DeviceTreeBase;
> - CONST UINT64 *RegVal;
> - INT32 Len;
> -
> - DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
> - ASSERT (DeviceTreeBase != NULL);
> -
> - RegVal = fdt_getprop (DeviceTreeBase,
> - mFdtFirstCpuOffset + (CpuId * mFdtCpuNodeSize),
> - "reg",
> - &Len);
> - if (!RegVal) {
> - DEBUG ((DEBUG_ERROR, "Couldn't find reg property for CPU:%d\n", CpuId));
> - return 0;
> - }
> -
> - return (fdt64_to_cpu (ReadUnaligned64 (RegVal)));
> -}
> -
> -/** Walks through the Device Tree created by Qemu and counts the number
> - of CPUs present in it.
> -
> - @return The number of CPUs present.
> -**/
> -EFIAPI
> -UINT32
> -FdtHelperCountCpus (
> - VOID
> - )
> -{
> - VOID *DeviceTreeBase;
> - INT32 Node;
> - INT32 Prev;
> - INT32 CpuNode;
> - UINT32 CpuCount;
> -
> - DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
> - ASSERT (DeviceTreeBase != NULL);
> -
> - // Make sure we have a valid device tree blob
> - ASSERT (fdt_check_header (DeviceTreeBase) == 0);
> -
> - CpuNode = fdt_path_offset (DeviceTreeBase, "/cpus");
> - if (CpuNode <= 0) {
> - DEBUG ((DEBUG_ERROR, "Unable to locate /cpus in device tree\n"));
> - return 0;
> - }
> -
> - CpuCount = 0;
> -
> - // Walk through /cpus node and count the number of subnodes.
> - // The count of these subnodes corresponds to the number of
> - // CPUs created by Qemu.
> - Prev = fdt_first_subnode (DeviceTreeBase, CpuNode);
> - mFdtFirstCpuOffset = Prev;
> - while (1) {
> - CpuCount++;
> - Node = fdt_next_subnode (DeviceTreeBase, Prev);
> - if (Node < 0) {
> - break;
> - }
> - mFdtCpuNodeSize = Node - Prev;
> - Prev = Node;
> - }
> -
> - return CpuCount;
> -}
>
> --
> 2.44.0
>
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