1 /**
2  * Describes functions for converting ARM CPER sections from binary and JSON format
3  * into an intermediate format.
4  *
5  * Author: Lawrence.Tang@arm.com
6  **/
7 
8 #include <stdio.h>
9 #include "json.h"
10 #include "../edk/Cper.h"
11 #include "../cper-utils.h"
12 #include "cper-section-arm.h"
13 
14 //Private pre-definitions.
15 json_object* cper_arm_error_info_to_ir(EFI_ARM_ERROR_INFORMATION_ENTRY* error_info);
16 json_object* cper_arm_processor_context_to_ir(EFI_ARM_CONTEXT_INFORMATION_HEADER* header, void** cur_pos);
17 json_object* cper_arm_cache_tlb_error_to_ir(EFI_ARM_CACHE_ERROR_STRUCTURE* cache_tlb_error, EFI_ARM_ERROR_INFORMATION_ENTRY* error_info);
18 json_object* cper_arm_bus_error_to_ir(EFI_ARM_BUS_ERROR_STRUCTURE* bus_error);
19 json_object* cper_arm_misc_register_array_to_ir(EFI_ARM_MISC_CONTEXT_REGISTER* misc_register);
20 
21 //Converts the given processor-generic CPER section into JSON IR.
22 json_object* cper_section_arm_to_ir(void* section, EFI_ERROR_SECTION_DESCRIPTOR* descriptor)
23 {
24     EFI_ARM_ERROR_RECORD* record = (EFI_ARM_ERROR_RECORD*)section;
25     json_object* section_ir = json_object_new_object();
26 
27     //Validation bits.
28     json_object* validation = bitfield_to_ir(record->ValidFields, 4, ARM_ERROR_VALID_BITFIELD_NAMES);
29     json_object_object_add(section_ir, "validationBits", validation);
30 
31     //Number of error info and context info structures, and length.
32     json_object_object_add(section_ir, "errorInfoNum", json_object_new_int(record->ErrInfoNum));
33     json_object_object_add(section_ir, "contextInfoNum", json_object_new_int(record->ContextInfoNum));
34     json_object_object_add(section_ir, "sectionLength", json_object_new_int(record->SectionLength));
35 
36     //Error affinity.
37     json_object* error_affinity = json_object_new_object();
38     json_object_object_add(error_affinity, "value", json_object_new_int(record->ErrorAffinityLevel));
39     json_object_object_add(error_affinity, "type",
40         json_object_new_string(record->ErrorAffinityLevel < 4 ? "Vendor Defined" : "Reserved"));
41     json_object_object_add(section_ir, "errorAffinity", error_affinity);
42 
43     //Processor ID (MPIDR_EL1) and chip ID (MIDR_EL1).
44     json_object_object_add(section_ir, "mpidrEl1", json_object_new_uint64(record->MPIDR_EL1));
45     json_object_object_add(section_ir, "midrEl1", json_object_new_uint64(record->MIDR_EL1));
46 
47     //Whether the processor is running, and the state of it if so.
48     json_object_object_add(section_ir, "running", json_object_new_boolean(record->RunningState));
49     if (record->RunningState >> 31)
50     {
51         //Bit 32 of running state is on, so PSCI state information is included.
52         //todo: Look at how to make this human readable from the ARM PSCI document.
53         json_object_object_add(section_ir, "psciState", json_object_new_int(record->PsciState));
54     }
55 
56     //Processor error structures.
57     json_object* error_info_array = json_object_new_array();
58     EFI_ARM_ERROR_INFORMATION_ENTRY* cur_error = (EFI_ARM_ERROR_INFORMATION_ENTRY*)(record + 1);
59     for (int i=0; i<record->ErrInfoNum; i++)
60     {
61         json_object_array_add(error_info_array, cper_arm_error_info_to_ir(cur_error));
62         cur_error++;
63     }
64     json_object_object_add(section_ir, "errorInfo", error_info_array);
65 
66     //Processor context structures.
67     //The current position is moved within the processing, as it is a dynamic size structure.
68     void* cur_pos = (void*)cur_error;
69     EFI_ARM_CONTEXT_INFORMATION_HEADER* header = (EFI_ARM_CONTEXT_INFORMATION_HEADER*)cur_error;
70     json_object* processor_context = cper_arm_processor_context_to_ir(header, &cur_pos);
71 
72     //Is there any vendor-specific information following?
73     if (cur_pos < section + record->SectionLength)
74     {
75         //todo: b64 and tag on vendor-specific binary info.
76     }
77 
78     return section_ir;
79 }
80 
81 //Converts a single ARM Process Error Information structure into JSON IR.
82 json_object* cper_arm_error_info_to_ir(EFI_ARM_ERROR_INFORMATION_ENTRY* error_info)
83 {
84     json_object* error_info_ir = json_object_new_object();
85 
86     //Version, length.
87     json_object_object_add(error_info_ir, "version", json_object_new_int(error_info->Version));
88     json_object_object_add(error_info_ir, "length", json_object_new_int(error_info->Length));
89 
90     //Validation bitfield.
91     json_object* validation = bitfield_to_ir(error_info->ValidationBits, 5, ARM_ERROR_INFO_ENTRY_VALID_BITFIELD_NAMES);
92     json_object_object_add(error_info_ir, "validationBits", validation);
93 
94     //The type of error information in this log.
95     //todo: The UEFI spec is ambiguous, what are the values for these??
96     json_object* error_type = integer_to_readable_pair(error_info->Type, 4,
97         ARM_ERROR_INFO_ENTRY_INFO_TYPES_KEYS,
98         ARM_ERROR_INFO_ENTRY_INFO_TYPES_VALUES,
99         "Unknown (Reserved)");
100     json_object_object_add(error_info_ir, "errorType", error_type);
101 
102     //Multiple error count.
103     json_object* multiple_error = json_object_new_object();
104     json_object_object_add(multiple_error, "value", json_object_new_int(error_info->MultipleError));
105     json_object_object_add(multiple_error, "type",
106         json_object_new_string(error_info->MultipleError < 1 ? "Single Error" : "Multiple Errors"));
107     json_object_object_add(error_info_ir, "multipleError", multiple_error);
108 
109     //Flags.
110     json_object* flags = bitfield_to_ir(error_info->Flags, 4, ARM_ERROR_INFO_ENTRY_FLAGS_NAMES);
111     json_object_object_add(error_info_ir, "flags", flags);
112 
113     //Error information, split by type.
114     json_object* error_subinfo = NULL;
115     switch (error_info->Type)
116     {
117         case 0: //Cache
118         case 1: //TLB
119             error_subinfo = cper_arm_cache_tlb_error_to_ir((EFI_ARM_CACHE_ERROR_STRUCTURE*)&error_info->ErrorInformation, error_info);
120             break;
121         case 2: //Bus
122             error_subinfo = cper_arm_bus_error_to_ir((EFI_ARM_BUS_ERROR_STRUCTURE*)&error_info->ErrorInformation);
123             break;
124     }
125     json_object_object_add(error_info_ir, "errorInformation", error_subinfo);
126 
127     return error_info_ir;
128 }
129 
130 //Converts a single ARM cache/TLB error information structure into JSON IR format.
131 json_object* cper_arm_cache_tlb_error_to_ir(EFI_ARM_CACHE_ERROR_STRUCTURE* cache_tlb_error, EFI_ARM_ERROR_INFORMATION_ENTRY* error_info)
132 {
133     json_object* cache_tlb_error_ir = json_object_new_object();
134 
135     //Validation bitfield.
136     json_object* validation = bitfield_to_ir(cache_tlb_error->ValidationBits, 7, ARM_CACHE_TLB_ERROR_VALID_BITFIELD_NAMES);
137     json_object_object_add(cache_tlb_error_ir, "validationBits", validation);
138 
139     //Transaction type.
140     json_object* transaction_type = integer_to_readable_pair(cache_tlb_error->TransactionType, 3,
141         ARM_ERROR_TRANSACTION_TYPES_KEYS,
142         ARM_ERROR_TRANSACTION_TYPES_VALUES,
143         "Unknown (Reserved)");
144     json_object_object_add(cache_tlb_error_ir, "transactionType", transaction_type);
145 
146     //Operation.
147     //todo: What are the types' numeric values? UEFI spec is ambiguous
148     json_object* operation;
149     if (error_info->Type == 0)
150     {
151         //Cache operation.
152         operation = integer_to_readable_pair(cache_tlb_error->Operation, 11,
153             ARM_CACHE_BUS_OPERATION_TYPES_KEYS,
154             ARM_CACHE_BUS_OPERATION_TYPES_VALUES,
155             "Unknown (Reserved)");
156     }
157     else
158     {
159         //TLB operation.
160         operation = integer_to_readable_pair(cache_tlb_error->Operation, 9,
161             ARM_TLB_OPERATION_TYPES_KEYS,
162             ARM_TLB_OPERATION_TYPES_VALUES,
163             "Unknown (Reserved)");
164     }
165     json_object_object_add(cache_tlb_error_ir, "operation", operation);
166 
167     //Miscellaneous remaining fields.
168     json_object_object_add(cache_tlb_error_ir, "level", json_object_new_int(cache_tlb_error->Level));
169     json_object_object_add(cache_tlb_error_ir, "processorContextCorrupt", json_object_new_boolean(cache_tlb_error->ProcessorContextCorrupt));
170     json_object_object_add(cache_tlb_error_ir, "corrected", json_object_new_boolean(cache_tlb_error->Corrected));
171     json_object_object_add(cache_tlb_error_ir, "precisePC", json_object_new_boolean(cache_tlb_error->PrecisePC));
172     json_object_object_add(cache_tlb_error_ir, "restartablePC", json_object_new_boolean(cache_tlb_error->RestartablePC));
173     return cache_tlb_error_ir;
174 }
175 
176 //Converts a single ARM bus error information structure into JSON IR format.
177 json_object* cper_arm_bus_error_to_ir(EFI_ARM_BUS_ERROR_STRUCTURE* bus_error)
178 {
179     json_object* bus_error_ir = json_object_new_object();
180 
181     //Validation bits.
182     json_object* validation = bitfield_to_ir(bus_error->ValidationBits, 7, ARM_BUS_ERROR_VALID_BITFIELD_NAMES);
183     json_object_object_add(bus_error_ir, "validationBits", validation);
184 
185     //Transaction type.
186     json_object* transaction_type = integer_to_readable_pair(bus_error->TransactionType, 3,
187         ARM_ERROR_TRANSACTION_TYPES_KEYS,
188         ARM_ERROR_TRANSACTION_TYPES_VALUES,
189         "Unknown (Reserved)");
190     json_object_object_add(bus_error_ir, "transactionType", transaction_type);
191 
192     //Operation.
193     json_object* operation = integer_to_readable_pair(bus_error->Operation, 7,
194         ARM_CACHE_BUS_OPERATION_TYPES_KEYS,
195         ARM_CACHE_BUS_OPERATION_TYPES_VALUES,
196         "Unknown (Reserved)");
197     json_object_object_add(bus_error_ir, "operation", operation);
198 
199     //Affinity level of bus error, + miscellaneous fields.
200     json_object_object_add(bus_error_ir, "level", json_object_new_int(bus_error->Level));
201     json_object_object_add(bus_error_ir, "processorContextCorrupt", json_object_new_boolean(bus_error->ProcessorContextCorrupt));
202     json_object_object_add(bus_error_ir, "corrected", json_object_new_boolean(bus_error->Corrected));
203     json_object_object_add(bus_error_ir, "precisePC", json_object_new_boolean(bus_error->PrecisePC));
204     json_object_object_add(bus_error_ir, "restartablePC", json_object_new_boolean(bus_error->RestartablePC));
205     json_object_object_add(bus_error_ir, "timedOut", json_object_new_boolean(bus_error->TimeOut));
206 
207     //Participation type.
208     json_object* participation_type = integer_to_readable_pair(bus_error->ParticipationType, 4,
209         ARM_BUS_PARTICIPATION_TYPES_KEYS,
210         ARM_BUS_PARTICIPATION_TYPES_VALUES,
211         "Unknown");
212     json_object_object_add(bus_error_ir, "participationType", participation_type);
213 
214     //Address space.
215     json_object* address_space = integer_to_readable_pair(bus_error->AddressSpace, 3,
216         ARM_BUS_ADDRESS_SPACE_TYPES_KEYS,
217         ARM_BUS_ADDRESS_SPACE_TYPES_VALUES,
218         "Unknown");
219     json_object_object_add(bus_error_ir, "addressSpace", address_space);
220 
221     //Memory access attributes.
222     //todo: find the specification of these in the ARM ARM
223     //...
224 
225     //Access Mode
226     json_object* access_mode = json_object_new_object();
227     json_object_object_add(access_mode, "value", json_object_new_int(bus_error->AccessMode));
228     json_object_object_add(access_mode, "name", json_object_new_string(bus_error->AccessMode == 0 ? "Secure" : "Normal"));
229     json_object_object_add(bus_error_ir, "accessMode", access_mode);
230 
231     return bus_error_ir;
232 }
233 
234 //Converts a single ARM processor context block into JSON IR.
235 json_object* cper_arm_processor_context_to_ir(EFI_ARM_CONTEXT_INFORMATION_HEADER* header, void** cur_pos)
236 {
237     json_object* context_ir = json_object_new_object();
238 
239     //Add the context type.
240     json_object* context_type = integer_to_readable_pair(header->RegisterContextType, 9,
241         ARM_PROCESSOR_INFO_REGISTER_CONTEXT_TYPES_KEYS,
242         ARM_PROCESSOR_INFO_REGISTER_CONTEXT_TYPES_VALUES,
243         "Unknown (Reserved)");
244     json_object_object_add(context_ir, "registerContextType", context_type);
245 
246     //Register array size (bytes).
247     json_object_object_add(context_ir, "registerArraySize", json_object_new_uint64(header->RegisterArraySize));
248 
249     //The register array itself.
250     *cur_pos = (void*)(header + 1);
251     json_object* register_array = NULL;
252     switch (header->RegisterContextType)
253     {
254         case EFI_ARM_CONTEXT_TYPE_AARCH32_GPR:
255             register_array = uniform_struct_to_ir((UINT32*)cur_pos,
256                 sizeof(EFI_ARM_V8_AARCH32_GPR) / sizeof(UINT32), ARM_AARCH32_GPR_NAMES);
257             break;
258         case EFI_ARM_CONTEXT_TYPE_AARCH32_EL1:
259             register_array = uniform_struct_to_ir((UINT32*)cur_pos,
260                 sizeof(EFI_ARM_AARCH32_EL1_CONTEXT_REGISTERS) / sizeof(UINT32), ARM_AARCH32_EL1_REGISTER_NAMES);
261             break;
262         case EFI_ARM_CONTEXT_TYPE_AARCH32_EL2:
263             register_array = uniform_struct_to_ir((UINT32*)cur_pos,
264                 sizeof(EFI_ARM_AARCH32_EL2_CONTEXT_REGISTERS) / sizeof(UINT32), ARM_AARCH32_EL2_REGISTER_NAMES);
265             break;
266         case EFI_ARM_CONTEXT_TYPE_AARCH32_SECURE:
267             register_array = uniform_struct_to_ir((UINT32*)cur_pos,
268                 sizeof(EFI_ARM_AARCH32_SECURE_CONTEXT_REGISTERS) / sizeof(UINT32), ARM_AARCH32_SECURE_REGISTER_NAMES);
269             break;
270         case EFI_ARM_CONTEXT_TYPE_AARCH64_GPR:
271             register_array = uniform_struct64_to_ir((UINT64*)cur_pos,
272                 sizeof(EFI_ARM_V8_AARCH64_GPR) / sizeof(UINT64), ARM_AARCH64_GPR_NAMES);
273             break;
274         case EFI_ARM_CONTEXT_TYPE_AARCH64_EL1:
275             register_array = uniform_struct64_to_ir((UINT64*)cur_pos,
276                 sizeof(EFI_ARM_AARCH64_EL1_CONTEXT_REGISTERS) / sizeof(UINT64), ARM_AARCH64_EL1_REGISTER_NAMES);
277             break;
278         case EFI_ARM_CONTEXT_TYPE_AARCH64_EL2:
279             register_array = uniform_struct64_to_ir((UINT64*)cur_pos,
280                 sizeof(EFI_ARM_AARCH64_EL2_CONTEXT_REGISTERS) / sizeof(UINT64), ARM_AARCH64_EL2_REGISTER_NAMES);
281             break;
282         case EFI_ARM_CONTEXT_TYPE_AARCH64_EL3:
283             register_array = uniform_struct64_to_ir((UINT64*)cur_pos,
284                 sizeof(EFI_ARM_AARCH64_EL3_CONTEXT_REGISTERS) / sizeof(UINT64), ARM_AARCH64_EL3_REGISTER_NAMES);
285             break;
286         case EFI_ARM_CONTEXT_TYPE_MISC:
287             register_array = cper_arm_misc_register_array_to_ir((EFI_ARM_MISC_CONTEXT_REGISTER*)cur_pos);
288             break;
289         default:
290             //Unknown register array type.
291             //todo: Format raw binary data and add instead of blank.
292             register_array = json_object_new_object();
293             break;
294     }
295 
296     //Set the current position to after the processor context structure.
297     *cur_pos = (UINT8*)(*cur_pos) + header->RegisterArraySize;
298 
299     return context_ir;
300 }
301 
302 //Converts a single CPER ARM miscellaneous register array to JSON IR format.
303 json_object* cper_arm_misc_register_array_to_ir(EFI_ARM_MISC_CONTEXT_REGISTER* misc_register)
304 {
305     json_object* register_array = json_object_new_object();
306     json_object* mrs_encoding = json_object_new_object();
307     json_object_object_add(mrs_encoding, "op2", json_object_new_int(misc_register->MrsOp2));
308     json_object_object_add(mrs_encoding, "crm", json_object_new_int(misc_register->MrsOp2));
309     json_object_object_add(mrs_encoding, "crn", json_object_new_int(misc_register->MrsOp2));
310     json_object_object_add(mrs_encoding, "op1", json_object_new_int(misc_register->MrsOp2));
311     json_object_object_add(mrs_encoding, "o0", json_object_new_int(misc_register->MrsOp2));
312     json_object_object_add(register_array, "mrsEncoding", mrs_encoding);
313     json_object_object_add(register_array, "value", json_object_new_uint64(misc_register->Value));
314 
315     return register_array;
316 }