Bring in snapshot of the MdePkg from Tianocore's EDK2 project at gitvendor/edk2/7babb4372e6a34cbbc54249b25056272a5a9924c

hash 7babb4372e6a34cbbc54249b25056272a5a9924c From 2017-Mar-03.

EDK2 is Intel's BSD Licensed UEFI implementation. We'll be bringing in
various routines from there rather than reimplementing them from
scratch for libefivar and the EFI boot loader.

The upstream repo has ^M ending on everything (sometimes multiple
times!), so the following script was run prior to import so changes we
have to do don't first include changing every line:

% find . -type f | xargs -n 1 sed -I.BAK -e `printf "s/\r//g"`
% find . -name \*.BAK | xargs rm

Also, only the MdePkg was brought in (it's 17MB, while the entire repo
is 250MB). It's almost completely certain nothing else will be used,
but if it is, it can be brough in along side MdePkg in the future.

Obtained from: https://github.com/tianocore/edk2.git

1 files changed, 38 insertions, 0 deletions

diff --git a/MdePkg/Library/BaseLib/Ia32/ReadDr6.c b/MdePkg/Library/BaseLib/Ia32/ReadDr6.c
new file mode 100644
index 000000000000..da0496531996
--- /dev/null
+++ b/MdePkg/Library/BaseLib/Ia32/ReadDr6.c
@@ -0,0 +1,38 @@
+/** @file
+  AsmReadDr6 function
+
+  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+
+
+
+/**
+  Reads the current value of Debug Register 6 (DR6).
+
+  Reads and returns the current value of DR6. This function is only available
+  on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on
+  x64.
+
+  @return The value of Debug Register 6 (DR6).
+
+**/
+UINTN
+EFIAPI
+AsmReadDr6 (
+  VOID
+  )
+{
+  __asm {
+    mov     eax, dr6
+  }
+}
+