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1 | /** @file\r |
| 2 | IA-32/x64 AsmEnablePaging64()\r |
| 3 | \r |
| 4 | Copyright (c) 2006, Intel Corporation<BR>\r |
| 5 | All rights reserved. This program and the accompanying materials\r |
| 6 | are licensed and made available under the terms and conditions of the BSD License\r |
| 7 | which accompanies this distribution. The full text of the license may be found at\r |
| 8 | http://opensource.org/licenses/bsd-license.php\r |
| 9 | \r |
| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| 12 | \r |
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13 | **/\r |
| 14 | \r |
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15 | \r |
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16 | \r |
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17 | \r |
| 18 | #include "BaseLibInternals.h"\r |
| 19 | \r |
| 20 | /**\r |
| 21 | Enables the 64-bit paging mode on the CPU.\r |
| 22 | \r |
| 23 | Enables the 64-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables\r |
| 24 | must be properly initialized prior to calling this service. This function\r |
| 25 | assumes the current execution mode is 32-bit protected mode with flat\r |
| 26 | descriptors. This function is only available on IA-32. After the 64-bit\r |
| 27 | paging mode is enabled, control is transferred to the function specified by\r |
| 28 | EntryPoint using the new stack specified by NewStack and passing in the\r |
| 29 | parameters specified by Context1 and Context2. Context1 and Context2 are\r |
| 30 | optional and may be 0. The function EntryPoint must never return.\r |
| 31 | \r |
| 32 | If the current execution mode is not 32-bit protected mode with flat\r |
| 33 | descriptors, then ASSERT().\r |
| 34 | If EntryPoint is 0, then ASSERT().\r |
| 35 | If NewStack is 0, then ASSERT().\r |
| 36 | \r |
| 37 | @param Cs The 16-bit selector to load in the CS before EntryPoint\r |
| 38 | is called. The descriptor in the GDT that this selector\r |
| 39 | references must be setup for long mode.\r |
| 40 | @param EntryPoint The 64-bit virtual address of the function to call with\r |
| 41 | the new stack after paging is enabled.\r |
| 42 | @param Context1 The 64-bit virtual address of the context to pass into\r |
| 43 | the EntryPoint function as the first parameter after\r |
| 44 | paging is enabled.\r |
| 45 | @param Context2 The 64-bit virtual address of the context to pass into\r |
| 46 | the EntryPoint function as the second parameter after\r |
| 47 | paging is enabled.\r |
| 48 | @param NewStack The 64-bit virtual address of the new stack to use for\r |
| 49 | the EntryPoint function after paging is enabled.\r |
| 50 | \r |
| 51 | **/\r |
| 52 | VOID\r |
| 53 | EFIAPI\r |
| 54 | AsmEnablePaging64 (\r |
| 55 | IN UINT16 Cs,\r |
| 56 | IN UINT64 EntryPoint,\r |
| 57 | IN UINT64 Context1, OPTIONAL\r |
| 58 | IN UINT64 Context2, OPTIONAL\r |
| 59 | IN UINT64 NewStack\r |
| 60 | )\r |
| 61 | {\r |
| 62 | ASSERT (EntryPoint != 0);\r |
| 63 | ASSERT (NewStack != 0);\r |
| 64 | InternalX86EnablePaging64 (Cs, EntryPoint, Context1, Context2, NewStack);\r |
| 65 | }\r |
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