Reviewed-by: Abner Chang <[email protected]> > -----Original Message----- > From: Schaefer, Daniel > Sent: Sunday, May 16, 2021 2:13 AM > To: [email protected] > Cc: Chang, Abner (HPS SW/FW Technologist) <[email protected]>; > Michael D Kinney <[email protected]>; Liming Gao > <[email protected]>; Zhiguang Liu <[email protected]>; Leif > Lindholm <[email protected]> > Subject: [PATCH v1 1/1] Add MemoryFence implementation for RiscV64 > > Cc: Abner Chang <[email protected]> > Cc: Michael D Kinney <[email protected]> > Cc: Liming Gao <[email protected]> > Cc: Zhiguang Liu <[email protected]> > Cc: Leif Lindholm <[email protected]> > Signed-off-by: Daniel Schaefer <[email protected]> > --- > 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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