This sequence should happen:
* CpuMp.c: Allocate a stack for the APs
* ApStartup.c: Send Start IPI to wake APs in 16-bit real mode
* MpAsm.S: AP enters CpuDxe driver code without stack
- AP grabs a lock
- AP sets up stack
- AP calls CpuMp.c:ApEntryPointInC
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.jus...@intel.com>
Signed-off-by: Chen Fan <chen.fan.f...@cn.fujitsu.com>
---
UefiCpuPkg/CpuDxe/CpuMp.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/UefiCpuPkg/CpuDxe/CpuMp.c b/UefiCpuPkg/CpuDxe/CpuMp.c
index 7f6312c..3668f05 100644
--- a/UefiCpuPkg/CpuDxe/CpuMp.c
+++ b/UefiCpuPkg/CpuDxe/CpuMp.c
@@ -1475,6 +1475,9 @@ InitializeMpSupport (
PrepareAPStartupCode ();
+ StartApsStackless ();
+
+ DEBUG ((DEBUG_INFO, "Detect CPU count: %d\n",
mMpSystemData.NumberOfProcessors));
if (mMpSystemData.NumberOfProcessors == 1) {
FreeApStartupCode ();
FreePages (mCommonStack, EFI_SIZE_TO_PAGES (gMaxLogicalProcessorNumber *
gApStackSize));
--
1.9.3
------------------------------------------------------------------------------
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