Setup processor context (GDT, PCR, TSS) and kernel startup stack before booting XTOS

xtldr/modules/xtos/includes/xtos.h

@@ -12,6 +12,9 @@
 #include <blmod.h>
 
 
+/* EFI XT Loader Protocol */
+EXTERN PXT_BOOT_LOADER_PROTOCOL XtLdrProtocol;
+
 /* XTOS kernel entry point */
 typedef VOID (XTAPI *PXT_ENTRY_POINT)(IN PKERNEL_INITIALIZATION_BLOCK BootParameters);
 
@@ -25,6 +28,22 @@ EFI_STATUS
 XtpBootSequence(IN PEFI_FILE_HANDLE BootDir,
                 IN PXT_BOOT_PROTOCOL_PARAMETERS Parameters);
 
+XTCDECL
+VOID
+XtpInitializeGdtEntry(IN PKGDTENTRY Gdt,
+                      IN USHORT Selector,
+                      IN ULONGLONG Base,
+                      IN ULONG Limit,
+                      IN UCHAR Type,
+                      IN UCHAR Dpl,
+                      IN UCHAR SegmentMode);
+
+XTCDECL
+EFI_STATUS
+XtpInitializeDescriptors(IN PLIST_ENTRY MemoryMappings,
+                         IN PVOID *VirtualAddress,
+                         OUT PKGDTENTRY *Gdt);
+
 XTCDECL
 EFI_STATUS
 XtpInitializeLoaderBlock(IN PLIST_ENTRY MemoryMappings,
@@ -38,6 +57,16 @@ XtpLoadModule(IN PEFI_FILE_HANDLE BootDir,
               IN LOADER_MEMORY_TYPE MemoryType,
               OUT PPECOFF_IMAGE_CONTEXT *ImageContext);
 
+XTCDECL
+VOID
+XtpLoadProcessorContext(IN PKGDTENTRY Gdt);
+
+XTCDECL
+EFI_STATUS
+XtpSetProcessorContext(IN PLIST_ENTRY MemoryMappings,
+                       IN PVOID *VirtualAddress,
+                       OUT PKGDTENTRY *Gdt);
+
 XTCDECL
 EFI_STATUS
 BlXtLdrModuleMain(IN EFI_HANDLE ImageHandle,