1 /**
2 * Describes functions for converting CCIX PER log CPER sections from binary and JSON format
3 * into an intermediate format.
4 *
5 * Author: Lawrence.Tang@arm.com
6 **/
7 #include <stdio.h>
8 #include <string.h>
9 #include <json.h>
10 #include <libcper/base64.h>
11 #include <libcper/Cper.h>
12 #include <libcper/cper-utils.h>
13 #include <libcper/sections/cper-section-ccix-per.h>
14
15 //Converts a single CCIX PER log CPER section into JSON IR.
cper_section_ccix_per_to_ir(void * section)16 json_object *cper_section_ccix_per_to_ir(void *section)
17 {
18 EFI_CCIX_PER_LOG_DATA *ccix_error = (EFI_CCIX_PER_LOG_DATA *)section;
19 json_object *section_ir = json_object_new_object();
20
21 //Length (bytes) for the entire structure.
22 json_object_object_add(section_ir, "length",
23 json_object_new_uint64(ccix_error->Length));
24
25 //Validation bits.
26 json_object *validation = bitfield_to_ir(
27 ccix_error->ValidBits, 3, CCIX_PER_ERROR_VALID_BITFIELD_NAMES);
28 json_object_object_add(section_ir, "validationBits", validation);
29
30 //CCIX source/port IDs.
31 json_object_object_add(section_ir, "ccixSourceID",
32 json_object_new_int(ccix_error->CcixSourceId));
33 json_object_object_add(section_ir, "ccixPortID",
34 json_object_new_int(ccix_error->CcixPortId));
35
36 //CCIX PER Log.
37 //This is formatted as described in Section 7.3.2 of CCIX Base Specification (Rev 1.0).
38 const char *cur_pos = (const char *)(ccix_error + 1);
39 int remaining_length =
40 ccix_error->Length - sizeof(EFI_CCIX_PER_LOG_DATA);
41 if (remaining_length > 0) {
42 int32_t encoded_len = 0;
43
44 char *encoded = base64_encode((UINT8 *)cur_pos,
45 remaining_length, &encoded_len);
46 if (encoded == NULL) {
47 printf("Failed to allocate encode output buffer. \n");
48 } else {
49 json_object_object_add(section_ir, "ccixPERLog",
50 json_object_new_string_len(
51 encoded, encoded_len));
52 free(encoded);
53 }
54 }
55
56 return section_ir;
57 }
58
59 //Converts a single CCIX PER CPER-JSON section into CPER binary, outputting to the given stream.
ir_section_ccix_per_to_cper(json_object * section,FILE * out)60 void ir_section_ccix_per_to_cper(json_object *section, FILE *out)
61 {
62 EFI_CCIX_PER_LOG_DATA *section_cper = (EFI_CCIX_PER_LOG_DATA *)calloc(
63 1, sizeof(EFI_CCIX_PER_LOG_DATA));
64
65 //Length.
66 section_cper->Length = json_object_get_uint64(
67 json_object_object_get(section, "length"));
68
69 //Validation bits.
70 section_cper->ValidBits = ir_to_bitfield(
71 json_object_object_get(section, "validationBits"), 3,
72 CCIX_PER_ERROR_VALID_BITFIELD_NAMES);
73
74 //CCIX source/port IDs.
75 section_cper->CcixSourceId = (UINT8)json_object_get_int(
76 json_object_object_get(section, "ccixSourceID"));
77 section_cper->CcixPortId = (UINT8)json_object_get_int(
78 json_object_object_get(section, "ccixPortID"));
79
80 //Write header out to stream.
81 fwrite(section_cper, sizeof(EFI_CCIX_PER_LOG_DATA), 1, out);
82 fflush(out);
83
84 //Write CCIX PER log itself to stream.
85 json_object *encoded = json_object_object_get(section, "ccixPERLog");
86 int32_t decoded_len = 0;
87
88 UINT8 *decoded = base64_decode(json_object_get_string(encoded),
89 json_object_get_string_len(encoded),
90 &decoded_len);
91 if (decoded == NULL) {
92 printf("Failed to allocate decode output buffer. \n");
93 } else {
94 fwrite(decoded, decoded_len, 1, out);
95 fflush(out);
96 free(decoded);
97 }
98 //Free resources.
99 free(section_cper);
100 }
101