Acked-by: Michael D Kinney <michael.d.kin...@intel.com> > -----Original Message----- > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Chao Li > Sent: Sunday, November 5, 2023 7:27 PM > To: devel@edk2.groups.io > Cc: Kinney, Michael D <michael.d.kin...@intel.com>; Gao, Liming > <gaolim...@byosoft.com.cn>; Liu, Zhiguang <zhiguang....@intel.com> > Subject: [edk2-devel] [PATCH v2 02/30] MdePkg: Add LoongArch64 FPU > function set into BaseCpuLib > > Adding InitializeFloatingPointUnits, EnableFloatingPointUnits and > DisableFloatingPointUnits functions for LoongArch64. > > BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4584 > > Cc: Michael D Kinney <michael.d.kin...@intel.com> > Cc: Liming Gao <gaolim...@byosoft.com.cn> > Cc: Zhiguang Liu <zhiguang....@intel.com> > Signed-off-by: Chao Li <lic...@loongson.cn> > --- > MdePkg/Include/Library/CpuLib.h | 37 +++++++++++--- > MdePkg/Library/BaseCpuLib/BaseCpuLib.inf | 7 ++- > .../Library/BaseCpuLib/LoongArch/DisableFpu.S | 17 +++++++ > .../Library/BaseCpuLib/LoongArch/EnableFpu.S | 17 +++++++ > .../BaseCpuLib/LoongArch/InitializeFpu.S | 51 > +++++++++++++++++++ > 5 files changed, 121 insertions(+), 8 deletions(-) > create mode 100644 MdePkg/Library/BaseCpuLib/LoongArch/DisableFpu.S > create mode 100644 MdePkg/Library/BaseCpuLib/LoongArch/EnableFpu.S > create mode 100644 > MdePkg/Library/BaseCpuLib/LoongArch/InitializeFpu.S > > diff --git a/MdePkg/Include/Library/CpuLib.h > b/MdePkg/Include/Library/CpuLib.h > index 3f29937dc7..42da55ca69 100644 > --- a/MdePkg/Include/Library/CpuLib.h > +++ b/MdePkg/Include/Library/CpuLib.h > @@ -8,6 +8,7 @@ > As a result, these services could not be defined in the Base > Library. > > Copyright (c) 2006 - 2018, Intel Corporation. All rights > reserved.<BR> > +Copyright (c) 2023, Loongson Technology Corporation Limited. All > rights reserved.<BR> > SPDX-License-Identifier: BSD-2-Clause-Patent > > **/ > @@ -41,14 +42,14 @@ CpuFlushTlb ( > VOID > ); > > -#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) > - > /** > + Initialize the CPU floating point units. > + > Initializes floating point units for requirement of UEFI > specification. > - This function initializes floating-point control word to 0x027F > (all exceptions > - masked,double-precision, round-to-nearest) and multimedia- > extensions control word > - (if supported) to 0x1F80 (all exceptions masked, round-to-nearest, > flush to zero > - for masked underflow). > + For IA32 and X64, this function initializes floating-point control > word to 0x027F > + (all exceptions masked,double-precision, round-to-nearest) and > multimedia-extensions > + control word (if supported) to 0x1F80 (all exceptions masked, > round-to-nearest, > + flush to zero for masked underflow). > **/ > VOID > EFIAPI > @@ -56,6 +57,30 @@ InitializeFloatingPointUnits ( > VOID > ); > > +/** > + Enable the CPU floating point units. > + > + Enable the CPU floating point units. > +**/ > +VOID > +EFIAPI > +EnableFloatingPointUnits ( > + VOID > + ); > + > +/** > + Disable the CPU floating point units. > + > + Disable the CPU floating point units. > +**/ > +VOID > +EFIAPI > +DisableFloatingPointUnits ( > + VOID > + ); > + > +#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) > + > /** > Determine if the standard CPU signature is "AuthenticAMD". > @retval TRUE The CPU signature matches. > diff --git a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf > b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf > index 9a162afe6d..89f6272f11 100644 > --- a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf > +++ b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf > @@ -65,8 +65,11 @@ > RiscV/Cpu.S > > [Sources.LOONGARCH64] > - LoongArch/CpuFlushTlb.S | GCC > - LoongArch/CpuSleep.S | GCC > + LoongArch/CpuFlushTlb.S | GCC > + LoongArch/CpuSleep.S | GCC > + LoongArch/InitializeFpu.S | GCC > + LoongArch/EnableFpu.S | GCC > + LoongArch/DisableFpu.S | GCC > > [Packages] > MdePkg/MdePkg.dec > diff --git a/MdePkg/Library/BaseCpuLib/LoongArch/DisableFpu.S > b/MdePkg/Library/BaseCpuLib/LoongArch/DisableFpu.S > new file mode 100644 > index 0000000000..6cb253a416 > --- /dev/null > +++ b/MdePkg/Library/BaseCpuLib/LoongArch/DisableFpu.S > @@ -0,0 +1,17 @@ > +#-------------------------------------------------------------------- > ---------- > +# > +# DisableFloatingPointUnits() for LoongArch64 > +# > +# Copyright (c) 2023, Loongson Technology Corporation Limited. All > rights reserved.<BR> > +# > +# SPDX-License-Identifier: BSD-2-Clause-Patent > +# > +#-------------------------------------------------------------------- > ---------- > +ASM_GLOBAL ASM_PFX(DisableFloatingPointUnits) > + > +ASM_PFX(DisableFloatingPointUnits): > + li.w $t0, 0x1 > + csrxchg $zero, $t0, 0x2 > + > + jirl $zero, $ra, 0 > + .end > diff --git a/MdePkg/Library/BaseCpuLib/LoongArch/EnableFpu.S > b/MdePkg/Library/BaseCpuLib/LoongArch/EnableFpu.S > new file mode 100644 > index 0000000000..27d8243a59 > --- /dev/null > +++ b/MdePkg/Library/BaseCpuLib/LoongArch/EnableFpu.S > @@ -0,0 +1,17 @@ > +#-------------------------------------------------------------------- > ---------- > +# > +# EnableFloatingPointUnits() for LoongArch64 > +# > +# Copyright (c) 2023, Loongson Technology Corporation Limited. All > rights reserved.<BR> > +# > +# SPDX-License-Identifier: BSD-2-Clause-Patent > +# > +#-------------------------------------------------------------------- > ---------- > +ASM_GLOBAL ASM_PFX(EnableFloatingPointUnits) > + > +ASM_PFX(EnableFloatingPointUnits): > + li.w $t0, 0x1 > + csrxchg $t0, $t0, 0x2 > + > + jirl $zero, $ra, 0 > + .end > diff --git a/MdePkg/Library/BaseCpuLib/LoongArch/InitializeFpu.S > b/MdePkg/Library/BaseCpuLib/LoongArch/InitializeFpu.S > new file mode 100644 > index 0000000000..1b9d01c2c1 > --- /dev/null > +++ b/MdePkg/Library/BaseCpuLib/LoongArch/InitializeFpu.S > @@ -0,0 +1,51 @@ > +#-------------------------------------------------------------------- > ---------- > +# > +# InitializeFloatingPointUnits() for LoongArch64 > +# > +# Copyright (c) 2023, Loongson Technology Corporation Limited. All > rights reserved.<BR> > +# > +# SPDX-License-Identifier: BSD-2-Clause-Patent > +# > +#-------------------------------------------------------------------- > ---------- > +ASM_GLOBAL ASM_PFX(InitializeFloatingPointUnits) > + > +ASM_PFX(InitializeFloatingPointUnits): > + li.d $t0, 0x0 // RNE mode > + movgr2fcsr $r0, $t0 > + li.d $t1, -1 // SNaN > + > + movgr2fr.d $f0, $t1 > + movgr2fr.d $f1, $t1 > + movgr2fr.d $f2, $t1 > + movgr2fr.d $f3, $t1 > + movgr2fr.d $f4, $t1 > + movgr2fr.d $f5, $t1 > + movgr2fr.d $f6, $t1 > + movgr2fr.d $f7, $t1 > + movgr2fr.d $f8, $t1 > + movgr2fr.d $f9, $t1 > + movgr2fr.d $f10, $t1 > + movgr2fr.d $f11, $t1 > + movgr2fr.d $f12, $t1 > + movgr2fr.d $f13, $t1 > + movgr2fr.d $f14, $t1 > + movgr2fr.d $f15, $t1 > + movgr2fr.d $f16, $t1 > + movgr2fr.d $f17, $t1 > + movgr2fr.d $f18, $t1 > + movgr2fr.d $f19, $t1 > + movgr2fr.d $f20, $t1 > + movgr2fr.d $f21, $t1 > + movgr2fr.d $f22, $t1 > + movgr2fr.d $f23, $t1 > + movgr2fr.d $f24, $t1 > + movgr2fr.d $f25, $t1 > + movgr2fr.d $f26, $t1 > + movgr2fr.d $f27, $t1 > + movgr2fr.d $f28, $t1 > + movgr2fr.d $f29, $t1 > + movgr2fr.d $f30, $t1 > + movgr2fr.d $f31, $t1 > + > + jirl $zero, $ra, 0 > + .end > -- > 2.27.0 > > > > >
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