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MdePkg: Add LoongArch64 FPU function set into BaseCpuLib

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Adding InitializeFloatingPointUnits, EnableFloatingPointUnits and
DisableFloatingPointUnits 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>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
This commit is contained in:
Chao Li 2024-01-03 10:27:56 +08:00 committed by Liming Gao
parent 9e1576bc10
commit e5b5073153
5 changed files with 128 additions and 7 deletions
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43
MdePkg/Include/Library/CpuLib.h
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@ -8,6 +8,7 @@
As a result, these services could not be defined in the Base Library. 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) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent SPDX-License-Identifier: BSD-2-Clause-Patent
**/ **/
@ -41,14 +42,16 @@ CpuFlushTlb (
VOID VOID
); );
#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) #if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) || defined (MDE_CPU_LOONGARCH64)
/** /**
Initialize the CPU floating point units.
Initializes floating point units for requirement of UEFI specification. Initializes floating point units for requirement of UEFI specification.
This function initializes floating-point control word to 0x027F (all exceptions For IA32 and X64, this function initializes floating-point control word to 0x027F
masked,double-precision, round-to-nearest) and multimedia-extensions control word (all exceptions masked,double-precision, round-to-nearest) and multimedia-extensions
(if supported) to 0x1F80 (all exceptions masked, round-to-nearest, flush to zero control word (if supported) to 0x1F80 (all exceptions masked, round-to-nearest,
for masked underflow). flush to zero for masked underflow).
**/ **/
VOID VOID
EFIAPI EFIAPI
@ -56,6 +59,10 @@ InitializeFloatingPointUnits (
VOID VOID
); );
#endif
#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64)
/** /**
Determine if the standard CPU signature is "AuthenticAMD". Determine if the standard CPU signature is "AuthenticAMD".
@retval TRUE The CPU signature matches. @retval TRUE The CPU signature matches.
@ -89,4 +96,30 @@ GetCpuSteppingId (
#endif #endif
#if defined (MDE_CPU_LOONGARCH64)
/**
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
);
#endif
#endif #endif

7
MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
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@ -65,8 +65,11 @@
RiscV/Cpu.S RiscV/Cpu.S
[Sources.LOONGARCH64] [Sources.LOONGARCH64]
LoongArch/CpuFlushTlb.S | GCC LoongArch/CpuFlushTlb.S | GCC
LoongArch/CpuSleep.S | GCC LoongArch/CpuSleep.S | GCC
LoongArch/InitializeFpu.S | GCC
LoongArch/EnableFpu.S | GCC
LoongArch/DisableFpu.S | GCC
[Packages] [Packages]
MdePkg/MdePkg.dec MdePkg/MdePkg.dec

17
MdePkg/Library/BaseCpuLib/LoongArch/DisableFpu.S Normal file
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@ -0,0 +1,17 @@
#------------------------------------------------------------------------------
#
# DisableFloatingPointUnits() for LoongArch64
#
# Copyright (c) 2024, 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

17
MdePkg/Library/BaseCpuLib/LoongArch/EnableFpu.S Normal file
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@ -0,0 +1,17 @@
#------------------------------------------------------------------------------
#
# EnableFloatingPointUnits() for LoongArch64
#
# Copyright (c) 2024, 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

51
MdePkg/Library/BaseCpuLib/LoongArch/InitializeFpu.S Normal file
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@ -0,0 +1,51 @@
#------------------------------------------------------------------------------
#
# InitializeFloatingPointUnits() for LoongArch64
#
# Copyright (c) 2024, 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