diff options
Diffstat (limited to 'OldMdePkg/Library/BaseLib/X64/DisablePaging64.S')
| -rw-r--r-- | OldMdePkg/Library/BaseLib/X64/DisablePaging64.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/OldMdePkg/Library/BaseLib/X64/DisablePaging64.S b/OldMdePkg/Library/BaseLib/X64/DisablePaging64.S new file mode 100644 index 0000000000..d23313de38 --- /dev/null +++ b/OldMdePkg/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 . + |