1. Port X64, IPF and EBC arch for BaseLib

[mirror_edk2.git] / MdePkg / Library / BaseLib / X64 / DisablePaging64.S

diff --git a/MdePkg/Library/BaseLib/X64/DisablePaging64.S b/MdePkg/Library/BaseLib/X64/DisablePaging64.S
new file mode 100644 (file)
index 0000000..d23313d
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/DisablePaging64.S
@@ -0,0 +1,66 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006, Intel Corporation
+# All rights reserved. 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.
+#
+# Module Name:
+#
+#   DisablePaging64.S
+#
+# Abstract:
+#
+#   AsmDisablePaging64 function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+    
+
+#------------------------------------------------------------------------------
+# VOID
+# EFIAPI
+# InternalX86DisablePaging64 (
+#   IN      UINT16                    Cs,                      %rdi
+#   IN      UINT64                    EntryPoint,              %rsi
+#   IN      UINT64                    Context1,  OPTIONAL      %rdx
+#   IN      UINT32                    Context2,  OPTIONAL      %rcx
+#   IN      UINT64                    NewStack                 %r8
+#   );
+#------------------------------------------------------------------------------
+
+.global _InternalX86DisablePaging64
+_InternalX86DisablePaging64:
+    cli    
+    shl    $0x20,%rcx
+    lea    (%rip), %eax
+    mov    %eax,%ecx
+    push   %rcx
+    mov    %edx,%ebx
+    mov    %r8d,%esi
+    mov    %r9d,%edi
+    mov    0x28(%rsp),%eax
+    lret   
+L1:
+    mov    %eax,%esp
+    mov    %cr0,%rax
+    btr    $0x1f,%eax
+    mov    %rax,%cr0
+    mov    $0xc0000080,%ecx
+    rdmsr  
+    and    $0xfe,%ah
+    wrmsr  
+    mov    %cr4,%rax
+    and    $0xdf,%al
+    mov    %rax,%cr4
+    push   %rdi
+    push   %rsi
+    callq  *%rbx
+    jmp    .
+