Re: [edk2-devel] [staging/LoongArch RESEND PATCH v1 30/33] MdeModulePkg/DxeIplPeim : LoongArch DxeIPL implementation.

["Abner Chang" <abner.chang@hpe.com>]

DxeLoadFunc.c is almost the same as RISC-V instance. However, I don't have idea how to leverage it because DxeLoadFunc is currently in the architecture-based folder.

Acked-by: Abner Chang <abner.chang@hpe.com>

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Chao Li
> Sent: Wednesday, February 9, 2022 4:02 PM
> To: devel@edk2.groups.io
> Cc: Liming Gao <gaoliming@byosoft.com.cn>; Guomin Jiang
> <guomin.jiang@intel.com>; Baoqi Zhang <zhangbaoqi@loongson.cn>
> Subject: [edk2-devel] [staging/LoongArch RESEND PATCH v1 30/33]
> MdeModulePkg/DxeIplPeim : LoongArch DxeIPL implementation.
> 
> Implement LoongArch DxeIPL instance.
> 
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> Cc: Guomin Jiang <guomin.jiang@intel.com>
> 
> Signed-off-by: Chao Li <lichao@loongson.cn>
> Co-authored-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
> ---
>  MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf       |  6 +-
>  .../Core/DxeIplPeim/LoongArch64/DxeLoadFunc.c | 61
> +++++++++++++++++++
>  2 files changed, 66 insertions(+), 1 deletion(-)
>  create mode 100644
> MdeModulePkg/Core/DxeIplPeim/LoongArch64/DxeLoadFunc.c
> 
> diff --git a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
> b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
> index 19b8a4c8ae..052ea0ec1a 100644
> --- a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
> +++ b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
> @@ -8,6 +8,7 @@
>  #  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
>  #  Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
>  #  Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights
> reserved.<BR>
> +#  Copyright (c) 2022, Loongson Technology Corporation Limited. All rights
> reserved.<BR>
>  #
>  #  SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -26,7 +27,7 @@
>  #
>  # The following information is for reference only and not required by the
> build tools.
>  #
> -#  VALID_ARCHITECTURES           = IA32 X64 EBC (EBC is for build only)
> AARCH64 RISCV64
> +#  VALID_ARCHITECTURES           = IA32 X64 EBC (EBC is for build only)
> AARCH64 RISCV64 LOONGARCH64
>  #
> 
>  [Sources]
> @@ -53,6 +54,9 @@
>  [Sources.RISCV64]
>    RiscV64/DxeLoadFunc.c
> 
> +[Sources.LOONGARCH64]
> +  LoongArch64/DxeLoadFunc.c
> +
>  [Packages]
>    MdePkg/MdePkg.dec
>    MdeModulePkg/MdeModulePkg.dec
> diff --git a/MdeModulePkg/Core/DxeIplPeim/LoongArch64/DxeLoadFunc.c
> b/MdeModulePkg/Core/DxeIplPeim/LoongArch64/DxeLoadFunc.c
> new file mode 100644
> index 0000000000..27ffc072d0
> --- /dev/null
> +++ b/MdeModulePkg/Core/DxeIplPeim/LoongArch64/DxeLoadFunc.c
> @@ -0,0 +1,61 @@
> +/** @file
> +  LoongArch specifc functionality for DxeLoad.
> +
> +  Copyright (c) 2022, Loongson Technology Corporation Limited. All rights
> reserved.<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "DxeIpl.h"
> +
> +/**
> +   Transfers control to DxeCore.
> +
> +   This function performs a CPU architecture specific operations to execute
> +   the entry point of DxeCore with the parameters of HobList.
> +   It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.
> +
> +   @param DxeCoreEntryPoint         The entry point of DxeCore.
> +   @param HobList                   The start of HobList passed to DxeCore.
> +
> +**/
> +VOID
> +HandOffToDxeCore (
> +  IN EFI_PHYSICAL_ADDRESS   DxeCoreEntryPoint,
> +  IN EFI_PEI_HOB_POINTERS   HobList
> +  )
> +{
> +  VOID                *BaseOfStack;
> +  VOID                *TopOfStack;
> +  EFI_STATUS          Status;
> +
> +  //
> +  // Allocate 128KB for the Stack
> +  //
> +  BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));
> +  ASSERT (BaseOfStack != NULL);
> +  //
> +  // Compute the top of the stack we were allocated. Pre-allocate a UINTN
> +  // for safety.
> +  //
> +  TopOfStack = (VOID *) ((UINTN) BaseOfStack + EFI_SIZE_TO_PAGES
> (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);
> +  TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
> +  //
> +  // End of PEI phase singal
> +  //
> +  Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi);
> +  ASSERT_EFI_ERROR (Status);
> +
> +  //
> +  // Update the contents of BSP stack HOB to reflect the real stack info
> passed to DxeCore.
> +  //
> +  UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN) BaseOfStack,
> STACK_SIZE);
> +
> +  SwitchStack (
> +    (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,
> +    HobList.Raw,
> +    NULL,
> +    TopOfStack
> +    );
> +}
> --
> 2.27.0
> 
> 
> 
> 
>