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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2726 | vana | 1 | /*++ |
| 2 | |||
| 3 | Copyright (c) 2000 Intel Corporation |
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| 4 | |||
| 5 | Module Name: |
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| 6 | |||
| 7 | Smbios.c |
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| 8 | |||
| 9 | Abstract: |
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| 10 | |||
| 11 | Lib fucntions for SMBIOS. Used to get system serial number and GUID |
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| 12 | |||
| 13 | Revision History |
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| 14 | |||
| 15 | --*/ |
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| 16 | |||
| 17 | #include "lib.h" |
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| 18 | |||
| 19 | |||
| 20 | EFI_STATUS |
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| 21 | LibGetSmbiosSystemGuidAndSerialNumber ( |
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| 22 | IN EFI_GUID *SystemGuid, |
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| 23 | OUT CHAR8 **SystemSerialNumber |
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| 24 | ) |
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| 25 | { |
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| 26 | EFI_STATUS Status; |
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| 27 | SMBIOS_STRUCTURE_TABLE *SmbiosTable; |
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| 28 | SMBIOS_STRUCTURE_POINTER Smbios; |
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| 29 | SMBIOS_STRUCTURE_POINTER SmbiosEnd; |
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| 30 | UINT16 Index; |
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| 31 | |||
| 32 | Status = LibGetSystemConfigurationTable(&SMBIOSTableGuid, (VOID**)&SmbiosTable); |
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| 33 | if (EFI_ERROR(Status)) { |
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| 34 | return EFI_NOT_FOUND; |
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| 35 | } |
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| 36 | |||
| 37 | Smbios.Hdr = (SMBIOS_HEADER *)SmbiosTable->TableAddress; |
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| 38 | SmbiosEnd.Raw = (UINT8 *)(SmbiosTable->TableAddress + SmbiosTable->TableLength); |
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| 39 | for (Index = 0; Index < SmbiosTable->TableLength ; Index++) { |
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| 40 | if (Smbios.Hdr->Type == 1) { |
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| 41 | if (Smbios.Hdr->Length < 0x19) { |
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| 42 | // |
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| 43 | // Older version did not support Guid and Serial number |
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| 44 | // |
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| 45 | continue; |
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| 46 | } |
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| 47 | |||
| 48 | // |
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| 49 | // SMBIOS tables are byte packed so we need to do a byte copy to |
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| 50 | // prevend alignment faults on IA-64. |
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| 51 | |||
| 52 | CopyMem (SystemGuid, &Smbios.Type1->Uuid, sizeof(EFI_GUID)); |
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| 53 | *SystemSerialNumber = LibGetSmbiosString(&Smbios, Smbios.Type1->SerialNumber); |
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| 54 | return EFI_SUCCESS; |
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| 55 | } |
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| 56 | |||
| 57 | // |
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| 58 | // Make Smbios point to the next record |
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| 59 | // |
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| 60 | LibGetSmbiosString (&Smbios, -1); |
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| 61 | |||
| 62 | if (Smbios.Raw >= SmbiosEnd.Raw) { |
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| 63 | // |
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| 64 | // SMBIOS 2.1 incorrectly stated the length of SmbiosTable as 0x1e. |
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| 65 | // given this we must double check against the lenght of |
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| 66 | /// the structure. My home PC has this bug.ruthard |
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| 67 | // |
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| 68 | return EFI_SUCCESS; |
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| 69 | } |
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| 70 | } |
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| 71 | |||
| 72 | return EFI_SUCCESS; |
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| 73 | } |
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| 74 | |||
| 75 | CHAR8* |
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| 76 | LibGetSmbiosString ( |
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| 77 | IN SMBIOS_STRUCTURE_POINTER *Smbios, |
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| 78 | IN UINT16 StringNumber |
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| 79 | ) |
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| 80 | /*++ |
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| 81 | |||
| 82 | Return SMBIOS string given the string number. |
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| 83 | |||
| 84 | Arguments: |
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| 85 | Smbios - Pointer to SMBIOS structure |
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| 86 | StringNumber - String number to return. -1 is used to skip all strings and |
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| 87 | point to the next SMBIOS structure. |
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| 88 | |||
| 89 | Returns: |
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| 90 | Pointer to string, or pointer to next SMBIOS strcuture if StringNumber == -1 |
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| 91 | --*/ |
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| 92 | { |
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| 93 | UINT16 Index; |
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| 94 | CHAR8 *String; |
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| 95 | |||
| 96 | // |
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| 97 | // Skip over formatted section |
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| 98 | // |
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| 99 | String = (CHAR8 *)(Smbios->Raw + Smbios->Hdr->Length); |
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| 100 | |||
| 101 | // |
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| 102 | // Look through unformated section |
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| 103 | // |
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| 104 | for (Index = 1; Index <= StringNumber; Index++) { |
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| 105 | if (StringNumber == Index) { |
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| 106 | return String; |
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| 107 | } |
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| 108 | |||
| 109 | // |
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| 110 | // Skip string |
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| 111 | // |
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| 112 | for (; *String != 0; String++); |
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| 113 | String++; |
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| 114 | |||
| 115 | if (*String == 0) { |
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| 116 | // |
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| 117 | // If double NULL then we are done. |
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| 118 | // Retrun pointer to next structure in Smbios. |
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| 119 | // if you pass in a -1 you will always get here |
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| 120 | // |
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| 121 | Smbios->Raw = (UINT8 *)++String; |
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| 122 | return NULL; |
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| 123 | } |
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| 124 | } |
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| 125 | return NULL; |
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| 126 | } |