update AP bootstrap code

xtoskrnl/hl/x86/cpu.c

@@ -79,6 +79,8 @@ HlStartProcessor(IN ULONG CpuId,
     return STATUS_SUCCESS;
 }
 
+extern ULONG_PTR ArBootstrapPageMap;
+
 XTAPI
 XTSTATUS
 HlStartAllProcessors(VOID)
@@ -95,6 +97,9 @@ HlStartAllProcessors(VOID)
     /* Check if at least one AP is present */
     if(HlpSystemInfo.CpuCount > 1)
     {
+        /* Save page map address in the bootstrap code */
+        ArBootstrapPageMap = ArReadControlRegister(3);
+
         /* Allocate 5 pages for AP bootstrap code and ensure it is low memory */
         Status = MmAllocateHardwareMemory(AP_SPINUP_PAGE_COUNT, FALSE, &ApPhysicalAddress);
         if(Status != STATUS_SUCCESS || ApPhysicalAddress.QuadPart > (0x100000 - AP_SPINUP_PAGE_COUNT * MM_PAGE_SIZE))