1 /**
2  * Functions for generating pseudo-random CPER PCI component 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 //Generates a single pseudo-random PCI component error section, saving the resulting address to the given
13 //location. Returns the size of the newly created section.
14 size_t generate_section_pci_dev(void** location)
15 {
16     //Generate how many register pairs will be attached to this section.
17     UINT32 num_memory_pairs = rand() % 4;
18     UINT32 num_io_pairs = rand() % 4;
19     UINT32 num_registers = num_memory_pairs + num_io_pairs;
20 
21     //Create random bytes.
22     int size = 40 + (num_registers * 16);
23     UINT8* bytes = generate_random_bytes(size);
24 
25     //Set reserved areas to zero.
26     UINT64* validation = (UINT64*)bytes;
27     *validation &= 0b11111; //Validation 5-63
28     for (int i=0; i<5; i++)
29         *(bytes + 27 + i) = 0; //Bytes 11-15 of ID info.
30 
31     //Set expected values.
32     UINT32* memory_number_field = (UINT32*)(bytes + 32);
33     UINT32* io_number_field = (UINT32*)(bytes + 36);
34     *memory_number_field = num_memory_pairs;
35     *io_number_field = num_io_pairs;
36 
37     //Fix error status.
38     create_valid_error_section(bytes + 8);
39 
40     //Set return values, exit.
41     *location = bytes;
42     return size;
43 }