| ;------------------------------------------------------------------------------ | |
| ; | |
| ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> | |
| ; SPDX-License-Identifier: BSD-2-Clause-Patent | |
| ; | |
| ; Module Name: | |
| ; | |
| ; DisablePaging32.Asm | |
| ; | |
| ; Abstract: | |
| ; | |
| ; AsmDisablePaging32 function | |
| ; | |
| ; Notes: | |
| ; | |
| ;------------------------------------------------------------------------------ | |
| SECTION .text | |
| ;------------------------------------------------------------------------------ | |
| ; VOID | |
| ; EFIAPI | |
| ; InternalX86DisablePaging32 ( | |
| ; IN SWITCH_STACK_ENTRY_POINT EntryPoint, | |
| ; IN VOID *Context1, OPTIONAL | |
| ; IN VOID *Context2, OPTIONAL | |
| ; IN VOID *NewStack | |
| ; ); | |
| ;------------------------------------------------------------------------------ | |
| global ASM_PFX(InternalX86DisablePaging32) | |
| ASM_PFX(InternalX86DisablePaging32): | |
| mov ebx, [esp + 4] | |
| mov ecx, [esp + 8] | |
| mov edx, [esp + 12] | |
| pushfd | |
| pop edi ; save EFLAGS to edi | |
| cli | |
| mov eax, cr0 | |
| btr eax, 31 | |
| mov esp, [esp + 16] | |
| mov cr0, eax | |
| push edi | |
| popfd ; restore EFLAGS from edi | |
| push edx | |
| push ecx | |
| call ebx | |
| jmp $ ; EntryPoint() should not return | |