1 files changed, 17 insertions, 0 deletions
diff --git a/UefiCpuPkg/CpuDxe/ApStartup.c b/UefiCpuPkg/CpuDxe/ApStartup.c
index 801f7f8611..7613b47942 100644
--- a/UefiCpuPkg/CpuDxe/ApStartup.c
+++ b/UefiCpuPkg/CpuDxe/ApStartup.c
@@ -328,3 +328,20 @@ StartApsStackless (
   return EFI_SUCCESS;
 }
 
+/**
+  Resets the Application Processor and directs it to jump to the
+  specified routine.
+
+  The processor jumps to this code in flat mode, but the processor's
+  stack is not initialized.
+
+  @param ProcessorId           the AP of ProcessorId was reset
+**/
+VOID
+ResetApStackless (
+  IN UINT32 ProcessorId
+  )
+{
+  SendInitSipiSipi (ProcessorId,
+                    (UINT32)(UINTN)(VOID*) StartupCode);
+}