Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
> -----Original Message-----
> From: Chao Li <lichao@loongson.cn>
> Sent: Sunday, November 5, 2023 7:27 PM
> 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 03/30] MdePkg: Add LoongArch64 exception function
> set into BaseLib
>
> Adding SetExceptionBaseAddress and SetTlbRebaseAddress functions
> for LoongArch64.
>
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4584
>
> 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/Include/Library/BaseLib.h | 20 +++++++++
> MdePkg/Library/BaseLib/BaseLib.inf | 1 +
> .../BaseLib/LoongArch64/ExceptionBase.S | 41
> +++++++++++++++++++
> 3 files changed, 62 insertions(+)
> create mode 100644 MdePkg/Library/BaseLib/LoongArch64/ExceptionBase.S
>
> diff --git a/MdePkg/Include/Library/BaseLib.h
> b/MdePkg/Include/Library/BaseLib.h
> index 5d7067ee85..a9a69c734c 100644
> --- a/MdePkg/Include/Library/BaseLib.h
> +++ b/MdePkg/Include/Library/BaseLib.h
> @@ -229,6 +229,26 @@ typedef struct {
>
> #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8
>
> +/*
> + * Set the exception base address for LoongArch.
> + *
> + * @param ExceptionBaseAddress The exception base address, must be
> aligned greater than or qeual to 4K .
> + */
> +VOID
> +SetExceptionBaseAddress (
> + IN UINT64
> + );
> +
> +/*
> + * Set the TlbRebase address for LoongArch.
> + *
> + * @param TlbRebaseAddress The TlbRebase address, must be aligned
> greater than or qeual to 4K .
> + */
> +VOID
> +SetTlbRebaseAddress (
> + IN UINT64
> + );
> +
> #endif // defined (MDE_CPU_LOONGARCH64)
>
> //
> diff --git a/MdePkg/Library/BaseLib/BaseLib.inf
> b/MdePkg/Library/BaseLib/BaseLib.inf
> index 03c7b02e82..a18fe5efb4 100644
> --- a/MdePkg/Library/BaseLib/BaseLib.inf
> +++ b/MdePkg/Library/BaseLib/BaseLib.inf
> @@ -419,6 +419,7 @@
> LoongArch64/CpuPause.S | GCC
> LoongArch64/SetJumpLongJump.S | GCC
> LoongArch64/SwitchStack.S | GCC
> + LoongArch64/ExceptionBase.S | GCC
>
> [Packages]
> MdePkg/MdePkg.dec
> diff --git a/MdePkg/Library/BaseLib/LoongArch64/ExceptionBase.S
> b/MdePkg/Library/BaseLib/LoongArch64/ExceptionBase.S
> new file mode 100644
> index 0000000000..36c6ca7ca8
> --- /dev/null
> +++ b/MdePkg/Library/BaseLib/LoongArch64/ExceptionBase.S
> @@ -0,0 +1,41 @@
> +#--------------------------------------------------------------------
> ----------
> +#
> +# LoongArch set exception base address operations
> +#
> +# Copyright (c) 2023, Loongson Technology Corporation Limited. All
> rights reserved.<BR>
> +#
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#--------------------------------------------------------------------
> ----------
> +
> +#include <Base.h>
> +#include <Register/LoongArch64/Csr.h>
> +
> +ASM_GLOBAL ASM_PFX(SetExceptionBaseAddress)
> +ASM_GLOBAL ASM_PFX(SetTlbRebaseAddress)
> +
> +#/**
> +# Set the exception base address for LoongArch.
> +#
> +# @param ExceptionBaseAddress The exception base address, must be
> aligned greater than or qeual to 4K .
> +#**/
> +ASM_PFX(SetExceptionBaseAddress):
> + csrrd $t0, LOONGARCH_CSR_ECFG
> + li.d $t1, ~(BIT16 | BIT17 | BIT18)
> + and $t0, $t0, $t1
> + csrwr $t0, LOONGARCH_CSR_ECFG
> +
> + move $t0, $a0
> + csrwr $t0, LOONGARCH_CSR_EBASE
> + jirl $zero, $ra, 0
> +
> +#/**
> +# Set the TlbRebase address for LoongArch.
> +#
> +# @param TlbRebaseAddress The TlbRebase address, must be aligned
> greater than or qeual to 4K .
> +#**/
> +ASM_PFX(SetTlbRebaseAddress):
> + move $t0, $a0
> + csrwr $t0, LOONGARCH_CSR_TLBREBASE
> + jirl $zero, $ra, 0
> +.end
> --
> 2.27.0
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