projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| df667535 KG |
1 | /** @file\r |
| 2 | This library defines some routines that are generic for IA32 family CPU.\r | |
| 3 | \r | |
| 4 | The library routines are UEFI specification compliant.\r | |
| 5 | \r | |
| 6 | Copyright (c) 2020, AMD Inc. All rights reserved.<BR>\r | |
| f826b208 | 7 | Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>\r |
| df667535 KG |
8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 9 | \r | |
| 10 | **/\r | |
| 11 | \r | |
| 12 | #include <Register/Intel/Cpuid.h>\r | |
| 13 | #include <Register/Amd/Cpuid.h>\r | |
| 14 | \r | |
| 15 | #include <Library/BaseLib.h>\r | |
| 16 | #include <Library/UefiCpuLib.h>\r | |
| 17 | \r | |
| 18 | /**\r | |
| 19 | Determine if the standard CPU signature is "AuthenticAMD".\r | |
| 20 | \r | |
| 21 | @retval TRUE The CPU signature matches.\r | |
| 22 | @retval FALSE The CPU signature does not match.\r | |
| 23 | \r | |
| 24 | **/\r | |
| 25 | BOOLEAN\r | |
| 26 | EFIAPI\r | |
| 27 | StandardSignatureIsAuthenticAMD (\r | |
| 28 | VOID\r | |
| 29 | )\r | |
| 30 | {\r | |
| 31 | UINT32 RegEbx;\r | |
| 32 | UINT32 RegEcx;\r | |
| 33 | UINT32 RegEdx;\r | |
| 34 | \r | |
| 35 | AsmCpuid (CPUID_SIGNATURE, NULL, &RegEbx, &RegEcx, &RegEdx);\r | |
| 36 | return (RegEbx == CPUID_SIGNATURE_AUTHENTIC_AMD_EBX &&\r | |
| 37 | RegEcx == CPUID_SIGNATURE_AUTHENTIC_AMD_ECX &&\r | |
| 38 | RegEdx == CPUID_SIGNATURE_AUTHENTIC_AMD_EDX);\r | |
| 39 | }\r | |
| f826b208 RN |
40 | \r |
| 41 | /**\r | |
| 42 | Return the 32bit CPU family and model value.\r | |
| 43 | \r | |
| 44 | @return CPUID[01h].EAX with Processor Type and Stepping ID cleared.\r | |
| 45 | **/\r | |
| 46 | UINT32\r | |
| 47 | EFIAPI\r | |
| 48 | GetCpuFamilyModel (\r | |
| 49 | VOID\r | |
| 50 | )\r | |
| 51 | {\r | |
| 52 | CPUID_VERSION_INFO_EAX Eax;\r | |
| 53 | \r | |
| 54 | AsmCpuid (CPUID_VERSION_INFO, &Eax.Uint32, NULL, NULL, NULL);\r | |
| 55 | \r | |
| 56 | //\r | |
| 57 | // Mask other fields than Family and Model.\r | |
| 58 | //\r | |
| 59 | Eax.Bits.SteppingId = 0;\r | |
| 60 | Eax.Bits.ProcessorType = 0;\r | |
| 61 | Eax.Bits.Reserved1 = 0;\r | |
| 62 | Eax.Bits.Reserved2 = 0;\r | |
| 63 | return Eax.Uint32;\r | |
| 64 | }\r | |
| 65 | \r | |
| 66 | /**\r | |
| 67 | Return the CPU stepping ID.\r | |
| 68 | @return CPU stepping ID value in CPUID[01h].EAX.\r | |
| 69 | **/\r | |
| 70 | UINT8\r | |
| 71 | EFIAPI\r | |
| 72 | GetCpuSteppingId (\r | |
| 73 | VOID\r | |
| 74 | )\r | |
| 75 | {\r | |
| 76 | CPUID_VERSION_INFO_EAX Eax;\r | |
| 77 | \r | |
| 78 | AsmCpuid (CPUID_VERSION_INFO, &Eax.Uint32, NULL, NULL, NULL);\r | |
| 79 | \r | |
| 053e878b | 80 | return (UINT8)Eax.Bits.SteppingId;\r |
| f826b208 | 81 | }\r |