UefiCpuPkg/CpuDxe: Startup APs

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.justen@intel.com>
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16370 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/UefiCpuPkg/CpuDxe/CpuMp.c b/UefiCpuPkg/CpuDxe/CpuMp.c
index 5d5c7db765972e99c7bc1190304c2772b04e44ff..2bc9f70bbbe4e19c06935db06a2972f410304e5e 100644 (file)
--- a/UefiCpuPkg/CpuDxe/CpuMp.c
+++ b/UefiCpuPkg/CpuDxe/CpuMp.c
@@ -1500,6 +1500,9 @@ InitializeMpSupport (
 \r
   PrepareAPStartupCode ();\r
 \r
 \r
   PrepareAPStartupCode ();\r
 \r

+  StartApsStackless ();\r
+\r
+  DEBUG ((DEBUG_INFO, "Detect CPU count: %d\n", mMpSystemData.NumberOfProcessors));\r

   if (mMpSystemData.NumberOfProcessors == 1) {\r
     FreeApStartupCode ();\r
     FreePages (mCommonStack, EFI_SIZE_TO_PAGES (gMaxLogicalProcessorNumber * gApStackSize));\r
   if (mMpSystemData.NumberOfProcessors == 1) {\r
     FreeApStartupCode ();\r
     FreePages (mCommonStack, EFI_SIZE_TO_PAGES (gMaxLogicalProcessorNumber * gApStackSize));\r