Re: [PATCH v2 27/34] MdePkg/BaseCpuLib: LoongArch Base CPU library implementation.

["Michael D Kinney" <michael.d.kinney@intel.com>]

Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>

> -----Original Message-----
> From: Chao Li <lichao@loongson.cn>
> Sent: Wednesday, September 14, 2022 2:42 AM
> To: devel@edk2.groups.io
> Cc: Kinney, Michael D <michael.d.kinney@intel.com>; Gao, Liming <gaoliming@byosoft.com.cn>; Liu, Zhiguang <zhiguang.liu@intel.com>
> Subject: [PATCH v2 27/34] MdePkg/BaseCpuLib: LoongArch Base CPU library implementation.
> 
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4053
> 
> Implement LoongArch CPU related functions in BaseCpuLib.
> 
> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> Cc: Zhiguang Liu <zhiguang.liu@intel.com>
> 
> Signed-off-by: Chao Li <lichao@loongson.cn>
> ---
>  MdePkg/Library/BaseCpuLib/BaseCpuLib.inf          |  7 ++++++-
>  MdePkg/Library/BaseCpuLib/BaseCpuLib.uni          |  5 +++--
>  MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S | 15 +++++++++++++++
>  MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S    | 15 +++++++++++++++
>  4 files changed, 39 insertions(+), 3 deletions(-)
>  create mode 100644 MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S
>  create mode 100644 MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S
> 
> diff --git a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
> index c4cd29a783..6b230f6e6d 100644
> --- a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
> +++ b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
> @@ -8,6 +8,7 @@
>  #  Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
> 
>  #  Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
> 
>  #  Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
> 
> +#  Portions Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
> 
>  #
> 
>  #  SPDX-License-Identifier: BSD-2-Clause-Patent
> 
>  #
> 
> @@ -25,7 +26,7 @@
> 
> 
> 
> 
>  #
> 
> -#  VALID_ARCHITECTURES           = IA32 X64 EBC ARM AARCH64 RISCV64
> 
> +#  VALID_ARCHITECTURES           = IA32 X64 EBC ARM AARCH64 RISCV64 LOONGARCH64
> 
>  #
> 
> 
> 
>  [Sources.IA32]
> 
> @@ -61,6 +62,10 @@
>  [Sources.RISCV64]
> 
>    RiscV/Cpu.S
> 
> 
> 
> +[Sources.LOONGARCH64]
> 
> +  LoongArch/CpuFlushTlb.S | GCC
> 
> +  LoongArch/CpuSleep.S    | GCC
> 
> +
> 
>  [Packages]
> 
>    MdePkg/MdePkg.dec
> 
> 
> 
> diff --git a/MdePkg/Library/BaseCpuLib/BaseCpuLib.uni b/MdePkg/Library/BaseCpuLib/BaseCpuLib.uni
> index 80dc495786..7c5c8dfb37 100644
> --- a/MdePkg/Library/BaseCpuLib/BaseCpuLib.uni
> +++ b/MdePkg/Library/BaseCpuLib/BaseCpuLib.uni
> @@ -1,13 +1,14 @@
>  // /** @file
> 
>  // Instance of CPU Library for various architecture.
> 
>  //
> 
> -// CPU Library implemented using ASM functions for IA-32, X64 and RISCV64,
> 
> +// CPU Library implemented using ASM functions for IA-32, X64, RISCV64 and LoongArch64,
> 
>  // PAL CALLs for IPF, and empty functions for EBC.
> 
>  //
> 
>  // Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
> 
>  // Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
> 
>  // Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
> 
>  // Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
> 
> +// Portions Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
> 
>  //
> 
>  // SPDX-License-Identifier: BSD-2-Clause-Patent
> 
>  //
> 
> @@ -16,5 +17,5 @@
> 
> 
>  #string STR_MODULE_ABSTRACT             #language en-US "Instance of CPU Library for various architectures"
> 
> 
> 
> -#string STR_MODULE_DESCRIPTION          #language en-US "CPU Library implemented using ASM functions for IA-32, X64 and RISCV64,
> PAL CALLs for IPF, and empty functions for EBC."
> 
> +#string STR_MODULE_DESCRIPTION          #language en-US "CPU Library implemented using ASM functions for IA-32, X64, RISCV64 and
> LoongArch64, PAL CALLs for IPF, and empty functions for EBC."
> 
> 
> 
> diff --git a/MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S b/MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S
> new file mode 100644
> index 0000000000..8b792f0a37
> --- /dev/null
> +++ b/MdePkg/Library/BaseCpuLib/LoongArch/CpuFlushTlb.S
> @@ -0,0 +1,15 @@
> +#------------------------------------------------------------------------------
> 
> +#
> 
> +# CpuFlushTlb() for LoongArch64
> 
> +#
> 
> +# Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
> 
> +#
> 
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> 
> +#
> 
> +#------------------------------------------------------------------------------
> 
> +ASM_GLOBAL ASM_PFX(CpuFlushTlb)
> 
> +
> 
> +ASM_PFX(CpuFlushTlb):
> 
> +  tlbflush
> 
> +  jirl $zero, $ra, 0
> 
> +  .end
> 
> diff --git a/MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S b/MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S
> new file mode 100644
> index 0000000000..eb31b10714
> --- /dev/null
> +++ b/MdePkg/Library/BaseCpuLib/LoongArch/CpuSleep.S
> @@ -0,0 +1,15 @@
> +#------------------------------------------------------------------------------
> 
> +#
> 
> +# CpuSleep() for LoongArch64
> 
> +#
> 
> +# Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
> 
> +#
> 
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> 
> +#
> 
> +#------------------------------------------------------------------------------
> 
> +ASM_GLOBAL ASM_PFX(CpuSleep)
> 
> +
> 
> +ASM_PFX(CpuSleep):
> 
> +  idle 0
> 
> +  jirl $zero, $ra, 0
> 
> +  .end
> 
> --
> 2.27.0