1 /**
2  * Functions for generating psuedo-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-sections.h"
11 
12 #define PCIE_PORT_TYPES (int []){0, 1, 4, 5, 6, 7, 8, 9, 10}
13 
14 //Generates a single psuedo-random PCIe error section, saving the resulting address to the given
15 //location. Returns the size of the newly created section.
16 size_t generate_section_pcie(void** location)
17 {
18     //Create random bytes.
19     int size = 208;
20     UINT8* bytes = generate_random_bytes(size);
21 
22     //Set reserved areas to zero.
23     UINT64* validation = (UINT64*)bytes;
24     *validation &= 0xFF; //Validation 8-63
25     UINT32* version = (UINT32*)(bytes + 12);
26     *version &= 0xFFFF; //Version bytes 2-3
27     UINT32* reserved = (UINT32*)(bytes + 20);
28     *reserved = 0; //Reserved bytes 20-24
29     *(bytes + 37) &= ~0b111; //Device ID byte 13 bits 0-3
30     *(bytes + 39) = 0; //Device ID byte 15
31 
32     //Set expected values.
33     int minor = rand() % 128;
34     int major = rand() % 128;
35     *version = int_to_bcd(minor);
36     *version |= int_to_bcd(major) << 8;
37 
38     //Fix values that could be above range.
39     UINT32* port_type = (UINT32*)(bytes + 8);
40     *port_type = PCIE_PORT_TYPES[rand() % (sizeof(PCIE_PORT_TYPES) / sizeof(int))];
41 
42     //Set return values, exit.
43     *location = bytes;
44     return size;
45 }