diff options
| author | Jeff Fan <jeff.fan@intel.com> | 2015-07-15 03:36:51 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@Edk2> | 2015-07-15 03:36:51 +0000 |
| commit | 46ba0f63e9adaa2147366fcbd68c1c6f672b647b (patch) | |
| tree | 2db42260e7b46ef0ac4a2a93ce9d3e0dab865d7c /UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm | |
| parent | 34ff8715bf7724c52b878ddf55f494ccb0a35da6 (diff) | |
UefiCpuPkg/CpuMpPei: Initialize FPU per UEFI specification
Invoke InitializeFloatingPointUnits() to initialize FPU per UEFI specification
before call C function in assembly code.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17993 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm')
| -rw-r--r-- | UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm b/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm index 99669ce95..3ddf26c29 100644 --- 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 |