/* $NetBSD: vm.c,v 1.1.1.1 2014/04/01 16:16:07 jakllsch Exp $ */ /*++ Copyright (c) 1998 Intel Corporation Module Name: vm.c Abstract: EFI Hell to remap runtime address into the new virual address space that was registered by the OS for RT calls. So the code image needs to be relocated. All pointers need to be manually fixed up since the address map changes. GOOD LUCK NOT HAVING BUGS IN YOUR CODE! PLEASE TEST A LOT. MAKE SURE EXIT BOOTSERVICES OVER WRITES ALL BOOTSERVICE MEMORY & DATA SPACES WHEN YOU TEST. Revision History --*/ #include "lib.h" #ifndef __GNUC__ #pragma RUNTIME_CODE(RtLibEnableVirtualMappings) #endif VOID RUNTIMEFUNCTION RtLibEnableVirtualMappings ( VOID ) { EFI_CONVERT_POINTER ConvertPointer; // // If this copy of the lib is linked into the firmware, then // do not update the pointers yet. // if (!LibFwInstance) { // // Different components are updating to the new virtual // mappings at differnt times. The only function that // is safe to call at this notification is ConvertAddress // ConvertPointer = RT->ConvertPointer; // // Fix any pointers that the lib created, that may be needed // during runtime. // ConvertPointer (EFI_INTERNAL_PTR, (VOID **)&RT); ConvertPointer (EFI_OPTIONAL_PTR, (VOID **)&LibRuntimeDebugOut); ConvertPointer (EFI_INTERNAL_PTR, (VOID **)&LibRuntimeRaiseTPL); ConvertPointer (EFI_INTERNAL_PTR, (VOID **)&LibRuntimeRestoreTPL); // that was it :^) } } #ifndef __GNUC__ #pragma RUNTIME_CODE(RtConvertList) #endif VOID RUNTIMEFUNCTION RtConvertList ( IN UINTN DebugDisposition, IN OUT LIST_ENTRY *ListHead ) { LIST_ENTRY *Link; LIST_ENTRY *NextLink; EFI_CONVERT_POINTER ConvertPointer; ConvertPointer = RT->ConvertPointer; // // Convert all the Flink & Blink pointers in the list // Link = ListHead; do { NextLink = Link->Flink; ConvertPointer ( Link->Flink == ListHead ? DebugDisposition : 0, (VOID **)&Link->Flink ); ConvertPointer ( Link->Blink == ListHead ? DebugDisposition : 0, (VOID **)&Link->Blink ); Link = NextLink; } while (Link != ListHead); }