1 /** 2 * Describes utility functions for parsing CPER into JSON IR. 3 * 4 * Author: Lawrence.Tang@arm.com 5 **/ 6 7 #include <stdio.h> 8 #include "json.h" 9 #include "edk/Cper.h" 10 #include "cper-utils.h" 11 12 //The available severity types for CPER. 13 const char* CPER_SEVERITY_TYPES[4] = {"Recoverable", "Fatal", "Corrected", "Informational"}; 14 15 //Converts a single integer value to an object containing a value, and a readable name if possible. 16 json_object* integer_to_readable_pair(int value, int len, int keys[], const char* values[], const char* default_value) 17 { 18 json_object* result = json_object_new_object(); 19 json_object_object_add(result, "value", json_object_new_int(value)); 20 21 //Search for human readable name, add. 22 const char* name = default_value; 23 for (int i=0; i<len; i++) 24 { 25 if (keys[i] == value) 26 name = values[i]; 27 } 28 29 json_object_object_add(result, "name", json_object_new_string(name)); 30 return result; 31 } 32 33 //Converts the given 64 bit bitfield to IR, assuming bit 0 starts on the left. 34 json_object* bitfield_to_ir(UINT64 bitfield, int num_fields, const char* names[]) 35 { 36 json_object* result = json_object_new_object(); 37 for (int i=0; i<num_fields; i++) 38 { 39 json_object_object_add(result, names[i], json_object_new_boolean((bitfield >> i) & 0b1)); 40 } 41 42 return result; 43 } 44 45 46 //Converts a single UINT16 revision number into JSON IR representation. 47 json_object* revision_to_ir(UINT16 revision) 48 { 49 json_object* revision_info = json_object_new_object(); 50 json_object_object_add(revision_info, "major", json_object_new_int(revision >> 8)); 51 json_object_object_add(revision_info, "minor", json_object_new_int(revision & 0xFF)); 52 return revision_info; 53 } 54 55 //Returns the appropriate string for the given integer severity. 56 const char* severity_to_string(UINT8 severity) 57 { 58 return severity < 4 ? CPER_SEVERITY_TYPES[severity] : "Unknown"; 59 } 60 61 //Helper function to convert an EDK EFI GUID into a string for intermediate use. 62 void guid_to_string(char* out, EFI_GUID* guid) 63 { 64 sprintf(out, "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x", 65 guid->Data1, 66 guid->Data2, 67 guid->Data3, 68 guid->Data4[0], 69 guid->Data4[1], 70 guid->Data4[2], 71 guid->Data4[3], 72 guid->Data4[4], 73 guid->Data4[5], 74 guid->Data4[6], 75 guid->Data4[7]); 76 } 77 78 //Returns one if two EFI GUIDs are equal, zero otherwise. 79 int guid_equal(EFI_GUID* a, EFI_GUID* b) 80 { 81 //Check top base 3 components. 82 if (a->Data1 != b->Data1 83 || a->Data2 != b->Data2 84 || a->Data3 != b->Data3) 85 { 86 return 0; 87 } 88 89 //Check Data4 array for equality. 90 for (int i=0; i<8; i++) 91 { 92 if (a->Data4[i] != b->Data4[i]) 93 return 0; 94 } 95 96 return 1; 97 }