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 "../../edk/BaseTypes.h"
9 #include "../gen-utils.h"
10 #include "gen-section.h"
11
12 #define PCIE_PORT_TYPES \
13 (int[]) \
14 { \
15 0, 1, 4, 5, 6, 7, 8, 9, 10 \
16 }
17
18 //Generates a single pseudo-random PCIe error section, saving the resulting address to the given
19 //location. Returns the size of the newly created section.
generate_section_pcie(void ** location)20 size_t generate_section_pcie(void **location)
21 {
22 //Create random bytes.
23 int size = 208;
24 UINT8 *bytes = generate_random_bytes(size);
25
26 //Set reserved areas to zero.
27 UINT64 *validation = (UINT64 *)bytes;
28 *validation &= 0xFF; //Validation 8-63
29 UINT32 *version = (UINT32 *)(bytes + 12);
30 *version &= 0xFFFF; //Version bytes 2-3
31 UINT32 *reserved = (UINT32 *)(bytes + 20);
32 *reserved = 0; //Reserved bytes 20-24
33 *(bytes + 37) &= ~0x7; //Device ID byte 13 bits 0-3
34 *(bytes + 39) = 0; //Device ID byte 15
35
36 //Set expected values.
37 int minor = rand() % 128;
38 int major = rand() % 128;
39 *version = int_to_bcd(minor);
40 *version |= int_to_bcd(major) << 8;
41
42 //Fix values that could be above range.
43 UINT32 *port_type = (UINT32 *)(bytes + 8);
44 *port_type = PCIE_PORT_TYPES[rand() %
45 (sizeof(PCIE_PORT_TYPES) / sizeof(int))];
46
47 //Set return values, exit.
48 *location = bytes;
49 return size;
50 }
51