[edk2-devel] [PATCH v1 1/1] Add MemoryFence implementation for RiscV64
Abner Chang
abner.chang at hpe.com
Wed Jul 14 14:11:31 UTC 2021
Reviewed-by: Abner Chang <abner.chang at hpe.com>
> -----Original Message-----
> From: Schaefer, Daniel
> Sent: Sunday, May 16, 2021 2:13 AM
> To: devel at edk2.groups.io
> Cc: Chang, Abner (HPS SW/FW Technologist) <abner.chang at hpe.com>;
> Michael D Kinney <michael.d.kinney at intel.com>; Liming Gao
> <gaoliming at byosoft.com.cn>; Zhiguang Liu <zhiguang.liu at intel.com>; Leif
> Lindholm <leif at nuviainc.com>
> Subject: [PATCH v1 1/1] Add MemoryFence implementation for RiscV64
>
> Cc: Abner Chang <abner.chang at hpe.com>
> Cc: Michael D Kinney <michael.d.kinney at intel.com>
> Cc: Liming Gao <gaoliming at byosoft.com.cn>
> Cc: Zhiguang Liu <zhiguang.liu at intel.com>
> Cc: Leif Lindholm <leif at nuviainc.com>
> Signed-off-by: Daniel Schaefer <daniel.schaefer at hpe.com>
> ---
> MdePkg/Library/BaseLib/BaseLib.inf | 1 +
> MdePkg/Library/BaseLib/RiscV64/MemoryFence.S | 33
> ++++++++++++++++++++
> 2 files changed, 34 insertions(+)
>
> diff --git a/MdePkg/Library/BaseLib/BaseLib.inf
> b/MdePkg/Library/BaseLib/BaseLib.inf
> index b76f3af380ea..b7ab5f632366 100644
> --- a/MdePkg/Library/BaseLib/BaseLib.inf
> +++ b/MdePkg/Library/BaseLib/BaseLib.inf
> @@ -399,6 +399,7 @@
> RiscV64/DisableInterrupts.c
>
> RiscV64/EnableInterrupts.c
>
> RiscV64/CpuPause.c
>
> + RiscV64/MemoryFence.S | GCC
>
> RiscV64/RiscVSetJumpLongJump.S | GCC
>
> RiscV64/RiscVCpuBreakpoint.S | GCC
>
> RiscV64/RiscVCpuPause.S | GCC
>
> diff --git a/MdePkg/Library/BaseLib/RiscV64/MemoryFence.S
> b/MdePkg/Library/BaseLib/RiscV64/MemoryFence.S
> new file mode 100644
> index 000000000000..283df9356a9a
> --- /dev/null
> +++ b/MdePkg/Library/BaseLib/RiscV64/MemoryFence.S
> @@ -0,0 +1,33 @@
> +##------------------------------------------------------------------------------
>
> +#
>
> +# MemoryFence() for RiscV64
>
> +
>
> +# Copyright (c) 2021, Hewlett Packard Enterprise Development. All rights
> reserved.
>
> +#
>
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
>
> +#
>
> +##------------------------------------------------------------------------------
>
> +
>
> +.text
>
> +.p2align 2
>
> +
>
> +ASM_GLOBAL ASM_PFX(MemoryFence)
>
> +
>
> +
>
> +#/**
>
> +# Used to serialize load and store operations.
>
> +#
>
> +# All loads and stores that proceed calls to this function are guaranteed to
> be
>
> +# globally visible when this function returns.
>
> +#
>
> +#**/
>
> +#VOID
>
> +#EFIAPI
>
> +#MemoryFence (
>
> +# VOID
>
> +# );
>
> +#
>
> +ASM_PFX(MemoryFence):
>
> + // Fence on all memory and I/O
>
> + fence
>
> + ret
>
> --
> 2.30.1
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