projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 15c9b25e AB |
1 | /** @file\r |
| 2 | ArmGicArchLib library class implementation for DT based virt platforms\r | |
| 3 | \r | |
| 4 | Copyright (c) 2015, Linaro Ltd. All rights reserved.<BR>\r | |
| 5 | \r | |
| 6 | This program and the accompanying materials\r | |
| 7 | are licensed and made available under the terms and conditions of the BSD License\r | |
| 8 | which accompanies this distribution. The full text of the license may be found at\r | |
| 9 | http://opensource.org/licenses/bsd-license.php\r | |
| 10 | \r | |
| 11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 13 | \r | |
| 14 | **/\r | |
| 15 | \r | |
| 16 | #include <Base.h>\r | |
| 17 | \r | |
| 18 | #include <Library/ArmGicLib.h>\r | |
| 19 | #include <Library/ArmGicArchLib.h>\r | |
| 20 | #include <Library/PcdLib.h>\r | |
| 21 | #include <Library/DebugLib.h>\r | |
| 22 | \r | |
| 23 | STATIC ARM_GIC_ARCH_REVISION mGicArchRevision;\r | |
| 24 | \r | |
| 25 | RETURN_STATUS\r | |
| 26 | EFIAPI\r | |
| 27 | ArmVirtGicArchLibConstructor (\r | |
| 28 | VOID\r | |
| 29 | )\r | |
| 30 | {\r | |
| 31 | UINT32 IccSre;\r | |
| 32 | \r | |
| 33 | switch (PcdGet32 (PcdArmGicRevision)) {\r | |
| 34 | \r | |
| 35 | case 3:\r | |
| 36 | //\r | |
| 37 | // The default implementation of ArmGicArchLib is responsible for enabling\r | |
| 38 | // the system register interface on the GICv3 if one is found. So let's do\r | |
| 39 | // the same here.\r | |
| 40 | //\r | |
| 41 | IccSre = ArmGicV3GetControlSystemRegisterEnable ();\r | |
| 42 | if (!(IccSre & ICC_SRE_EL2_SRE)) {\r | |
| 43 | ArmGicV3SetControlSystemRegisterEnable (IccSre | ICC_SRE_EL2_SRE);\r | |
| 44 | IccSre = ArmGicV3GetControlSystemRegisterEnable ();\r | |
| 45 | }\r | |
| 46 | \r | |
| 47 | //\r | |
| 48 | // Unlike the default implementation, there is no fall through to GICv2\r | |
| 49 | // mode if this GICv3 cannot be driven in native mode due to the fact\r | |
| 50 | // that the System Register interface is unavailable.\r | |
| 51 | //\r | |
| 52 | ASSERT (IccSre & ICC_SRE_EL2_SRE);\r | |
| 53 | \r | |
| 54 | mGicArchRevision = ARM_GIC_ARCH_REVISION_3;\r | |
| 55 | break;\r | |
| 56 | \r | |
| 57 | case 2:\r | |
| 58 | mGicArchRevision = ARM_GIC_ARCH_REVISION_2;\r | |
| 59 | break;\r | |
| 60 | \r | |
| 61 | default:\r | |
| 62 | DEBUG ((EFI_D_ERROR, "%a: No GIC revision specified!\n", __FUNCTION__));\r | |
| 63 | return RETURN_NOT_FOUND;\r | |
| 64 | }\r | |
| 65 | return RETURN_SUCCESS;\r | |
| 66 | }\r | |
| 67 | \r | |
| 68 | ARM_GIC_ARCH_REVISION\r | |
| 69 | EFIAPI\r | |
| 70 | ArmGicGetSupportedArchRevision (\r | |
| 71 | VOID\r | |
| 72 | )\r | |
| 73 | {\r | |
| 74 | return mGicArchRevision;\r | |
| 75 | }\r |