mirror of https://github.com/acidanthera/audk.git
67 lines
1.8 KiB
ArmAsm
67 lines
1.8 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006, Intel Corporation
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# All rights reserved. This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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# Module Name:
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#
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# DisablePaging64.S
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#
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# Abstract:
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#
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# AsmDisablePaging64 function
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#
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# Notes:
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#
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# InternalX86DisablePaging64 (
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# IN UINT16 Cs, %rdi
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# IN UINT64 EntryPoint, %rsi
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# IN UINT64 Context1, OPTIONAL %rdx
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# IN UINT32 Context2, OPTIONAL %rcx
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# IN UINT64 NewStack %r8
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# );
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#------------------------------------------------------------------------------
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.global ASM_PFX(InternalX86DisablePaging64)
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ASM_PFX(InternalX86DisablePaging64):
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cli
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shl $0x20,%rcx
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lea (%rip), %eax
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mov %eax,%ecx
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push %rcx
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mov %edx,%ebx
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mov %r8d,%esi
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mov %r9d,%edi
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mov 0x28(%rsp),%eax
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lret
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L1:
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mov %eax,%esp
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mov %cr0,%rax
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btr $0x1f,%eax
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mov %rax,%cr0
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mov $0xc0000080,%ecx
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rdmsr
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and $0xfe,%ah
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wrmsr
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mov %cr4,%rax
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and $0xdf,%al
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mov %rax,%cr4
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push %rdi
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push %rsi
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callq *%rbx
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jmp .
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