1 /**
2 * Functions for generating pseudo-random CPER PCIe error sections.
3 *
4 * Author: Lawrence.Tang@arm.com
5 **/
6
7 #include <stdlib.h>
8 #include <libcper/BaseTypes.h>
9 #include <libcper/generator/gen-utils.h>
10 #include <libcper/generator/sections/gen-section.h>
11
12 #define PCIE_PORT_TYPES (int[]){ 0, 1, 4, 5, 6, 7, 8, 9, 10 }
13
14 //Generates a single pseudo-random PCIe error section, saving the resulting address to the given
15 //location. Returns the size of the newly created section.
generate_section_pcie(void ** location,GEN_VALID_BITS_TEST_TYPE validBitsType)16 size_t generate_section_pcie(void **location,
17 GEN_VALID_BITS_TEST_TYPE validBitsType)
18 {
19 //Create random bytes.
20 int size = 208;
21 UINT8 *bytes = generate_random_bytes(size);
22
23 //Set reserved areas to zero.
24 UINT64 *validation = (UINT64 *)bytes;
25 *validation &= 0xFF; //Validation 8-63
26 if (validBitsType == ALL_VALID) {
27 *validation = 0xFF;
28 } else if (validBitsType == SOME_VALID) {
29 /*
30 * Valid Sections
31 * 0b00000001 : Port Type
32 * 0b00000100 : Command Status Valid
33 * 0b00010000 : Device Serial Number Valid
34 * 0b01000000 : Capability Structure Valid
35 * 0b10000000 : AER Info Valid
36 */
37 *validation = 0xD5;
38 }
39 UINT32 *version = (UINT32 *)(bytes + 12);
40 *version &= 0xFFFF; //Version bytes 2-3
41 UINT32 *reserved = (UINT32 *)(bytes + 20);
42 *reserved = 0; //Reserved bytes 20-24
43 *(bytes + 37) &= ~0x7; //Device ID byte 13 bits 0-3
44 *(bytes + 39) = 0; //Device ID byte 15
45
46 //Set expected values.
47 int minor = cper_rand() % 128;
48 int major = cper_rand() % 128;
49 *version = int_to_bcd(minor);
50 *version |= int_to_bcd(major) << 8;
51
52 //Fix values that could be above range.
53 UINT32 *port_type = (UINT32 *)(bytes + 8);
54 *port_type = PCIE_PORT_TYPES[cper_rand() %
55 (sizeof(PCIE_PORT_TYPES) / sizeof(int))];
56
57 //Set return values, exit.
58 *location = bytes;
59 return size;
60 }
61