UefiCpuPkg/CpuMpPei: Initialize FPU per UEFI specification

[mirror_edk2.git] / UefiCpuPkg / CpuMpPei / X64 / MpFuncs.nasm

diff --git a/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm b/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm
index 99669ce95ede87b8f8f102b0178d7313967e7b33..3ddf26c29dc7eb6e92c1faf9d738b9f49cc8c071 100644 (file)
--- a/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm
+++ b/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm
@@ -19,6 +19,7 @@
 ;-------------------------------------------------------------------------------
 
 %include "MpEqu.inc"
+extern ASM_PFX(InitializeFloatingPointUnits)
 
 DEFAULT REL
 
@@ -155,6 +156,10 @@ CProcedureInvoke:
     push       rbp
     mov        rbp, rsp
 
+    mov        rax, ASM_PFX(InitializeFloatingPointUnits)
+    sub        rsp, 20h
+    call       rax               ; Call assembly function to initialize FPU per UEFI spec
+    add        rsp, 20h
 
     mov        edx, ebx          ; edx is NumApsExecuting
     mov        ecx, esi