projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| a6141834 LE |
1 | /** @file\r |
| 2 | Decide whether the firmware should expose an ACPI- and/or a Device Tree-based\r | |
| 3 | hardware description to the operating system.\r | |
| 4 | \r | |
| 5 | Copyright (c) 2017, Red Hat, Inc.\r | |
| 6 | \r | |
| 7 | This program and the accompanying materials are licensed and made available\r | |
| 8 | under the terms and conditions of the BSD License which accompanies this\r | |
| 9 | distribution. The full text of the license may be found at\r | |
| 10 | http://opensource.org/licenses/bsd-license.php\r | |
| 11 | \r | |
| 12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
| 13 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 14 | **/\r | |
| 15 | \r | |
| 16 | #include <Guid/PlatformHasAcpi.h>\r | |
| 17 | #include <Guid/PlatformHasDeviceTree.h>\r | |
| 18 | #include <Library/BaseLib.h>\r | |
| 19 | #include <Library/DebugLib.h>\r | |
| 20 | #include <Library/UefiBootServicesTableLib.h>\r | |
| 21 | \r | |
| 22 | EFI_STATUS\r | |
| 23 | EFIAPI\r | |
| 24 | XenPlatformHasAcpiDt (\r | |
| 25 | IN EFI_HANDLE ImageHandle,\r | |
| 26 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
| 27 | )\r | |
| 28 | {\r | |
| 29 | EFI_STATUS Status;\r | |
| 30 | \r | |
| 31 | //\r | |
| 32 | // If we fail to install any of the necessary protocols below, the OS will be\r | |
| 33 | // unbootable anyway (due to lacking hardware description), so tolerate no\r | |
| 34 | // errors here.\r | |
| 35 | //\r | |
| 36 | // Always make ACPI available on 64-bit systems.\r | |
| 37 | //\r | |
| 38 | if (MAX_UINTN == MAX_UINT64) {\r | |
| 39 | Status = gBS->InstallProtocolInterface (\r | |
| 40 | &ImageHandle,\r | |
| 41 | &gEdkiiPlatformHasAcpiGuid,\r | |
| 42 | EFI_NATIVE_INTERFACE,\r | |
| 43 | NULL\r | |
| 44 | );\r | |
| 45 | if (EFI_ERROR (Status)) {\r | |
| 46 | goto Failed;\r | |
| 47 | }\r | |
| 48 | }\r | |
| 49 | \r | |
| 50 | //\r | |
| 51 | // Expose the Device Tree unconditionally.\r | |
| 52 | //\r | |
| 53 | Status = gBS->InstallProtocolInterface (\r | |
| 54 | &ImageHandle,\r | |
| 55 | &gEdkiiPlatformHasDeviceTreeGuid,\r | |
| 56 | EFI_NATIVE_INTERFACE,\r | |
| 57 | NULL\r | |
| 58 | );\r | |
| 59 | if (EFI_ERROR (Status)) {\r | |
| 60 | goto Failed;\r | |
| 61 | }\r | |
| 62 | \r | |
| 63 | return Status;\r | |
| 64 | \r | |
| 65 | Failed:\r | |
| 66 | ASSERT_EFI_ERROR (Status);\r | |
| 67 | CpuDeadLoop ();\r | |
| 68 | //\r | |
| 69 | // Keep compilers happy.\r | |
| 70 | //\r | |
| 71 | return Status;\r | |
| 72 | }\r |