Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break existing...

[mirror_edk2.git] / OldMdePkg / Library / BaseLib / Ia32 / DisablePaging32.S

diff --git a/OldMdePkg/Library/BaseLib/Ia32/DisablePaging32.S b/OldMdePkg/Library/BaseLib/Ia32/DisablePaging32.S
new file mode 100644 (file)
index 0000000..7898e81
--- /dev/null
+++ b/OldMdePkg/Library/BaseLib/Ia32/DisablePaging32.S
@@ -0,0 +1,52 @@
+#------------------------------------------------------------------------------\r
+#\r
+# Copyright (c) 2006, Intel Corporation\r
+# All rights reserved. This program and the accompanying materials\r
+# are licensed and made available under the terms and conditions of the BSD License\r
+# which accompanies this distribution.  The full text of the license may be found at\r
+# http://opensource.org/licenses/bsd-license.php\r
+#\r
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+#\r
+# Module Name:\r
+#\r
+#   DisablePaging32.Asm\r
+#\r
+# Abstract:\r
+#\r
+#   InternalX86DisablePaging32 function\r
+#\r
+# Notes:\r
+#\r
+#------------------------------------------------------------------------------\r
+\r
+.globl ASM_PFX(InternalX86DisablePaging32)\r
+\r
+#------------------------------------------------------------------------------\r
+# VOID\r
+# EFIAPI\r
+# InternalX86DisablePaging32 (\r
+#   IN      SWITCH_STACK_ENTRY_POINT  EntryPoint,\r
+#   IN      VOID                      *Context1,    OPTIONAL\r
+#   IN      VOID                      *Context2,    OPTIONAL\r
+#   IN      VOID                      *NewStack\r
+#   );\r
+#------------------------------------------------------------------------------\r
+ASM_PFX(InternalX86DisablePaging32):\r
+    movl    4(%esp), %ebx\r
+    movl    8(%esp), %ecx\r
+    movl    12(%esp), %edx\r
+    pushfl\r
+    pop     %edi\r
+    cli\r
+    movl    %cr0, %eax\r
+    btrl    $31, %eax\r
+    movl    16(%esp), %esp\r
+    movl    %eax, %cr0\r
+    push    %edi\r
+    popfl\r
+    push    %edx\r
+    push    %ecx\r
+    call    *%ebx\r
+    jmp     .\r