projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 7e08bace LG |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r | |
| 4 | ; This program and the accompanying materials\r | |
| 5 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
| 6 | ; which accompanies this distribution. The full text of the license may be found at\r | |
| 7 | ; http://opensource.org/licenses/bsd-license.php.\r | |
| 8 | ;\r | |
| 9 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 10 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 11 | ;\r | |
| 12 | ; Module Name:\r | |
| 13 | ;\r | |
| 14 | ; DisablePaging32.Asm\r | |
| 15 | ;\r | |
| 16 | ; Abstract:\r | |
| 17 | ;\r | |
| 18 | ; AsmDisablePaging32 function\r | |
| 19 | ;\r | |
| 20 | ; Notes:\r | |
| 21 | ;\r | |
| 22 | ;------------------------------------------------------------------------------\r | |
| 23 | \r | |
| 24 | SECTION .text\r | |
| 25 | \r | |
| 26 | ;------------------------------------------------------------------------------\r | |
| 27 | ; VOID\r | |
| 28 | ; EFIAPI\r | |
| 29 | ; InternalX86DisablePaging32 (\r | |
| 30 | ; IN SWITCH_STACK_ENTRY_POINT EntryPoint,\r | |
| 31 | ; IN VOID *Context1, OPTIONAL\r | |
| 32 | ; IN VOID *Context2, OPTIONAL\r | |
| 33 | ; IN VOID *NewStack\r | |
| 34 | ; );\r | |
| 35 | ;------------------------------------------------------------------------------\r | |
| 36 | global ASM_PFX(InternalX86DisablePaging32)\r | |
| 37 | ASM_PFX(InternalX86DisablePaging32):\r | |
| 38 | mov ebx, [esp + 4]\r | |
| 39 | mov ecx, [esp + 8]\r | |
| 40 | mov edx, [esp + 12]\r | |
| 41 | pushfd\r | |
| 42 | pop edi ; save EFLAGS to edi\r | |
| 43 | cli\r | |
| 44 | mov eax, cr0\r | |
| 45 | btr eax, 31\r | |
| 46 | mov esp, [esp + 16]\r | |
| 47 | mov cr0, eax\r | |
| 48 | push edi\r | |
| 49 | popfd ; restore EFLAGS from edi\r | |
| 50 | push edx\r | |
| 51 | push ecx\r | |
| 52 | call ebx\r | |
| 53 | jmp $ ; EntryPoint() should not return\r | |
| 54 | \r |