1 /**
2  * Functions for generating pseudo-random CXL 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 CXL component error section, saving the resulting address to the given
13 //location. Returns the size of the newly created section.
generate_section_cxl_component(void ** location)14 size_t generate_section_cxl_component(void **location)
15 {
16 	//Create a random length for the CXL component event log.
17 	//The logs attached here do not necessarily conform to the specification, and are simply random.
18 	int log_len = rand() % 64;
19 
20 	//Create random bytes.
21 	int size = 32 + log_len;
22 	UINT8 *bytes = generate_random_bytes(size);
23 
24 	//Set reserved areas to zero.
25 	UINT32 *validation = (UINT32 *)(bytes + 4);
26 	*validation &= 0x7;
27 	*(validation + 1) = 0;
28 	UINT8 *slot_number = (UINT8 *)(bytes + 21);
29 	*slot_number &= ~0x7; //Device ID slot number bits 0-2.
30 	*(bytes + 23) = 0;    //Device ID byte 11.
31 
32 	//Set expected values.
33 	UINT32 *length = (UINT32 *)bytes;
34 	*length = size;
35 
36 	//Set return values, exit.
37 	*location = bytes;
38 	return size;
39 }
40