1 /**
2  * Functions for generating pseudo-random CCIX PER 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 //Generates a single pseudo-random CCIX PER error section, saving the resulting address to the given
13 //location. Returns the size of the newly created section.
14 size_t generate_section_ccix_per(void** location)
15 {
16     //Create a random length for the CCIX PER log.
17     //The log attached here does not necessarily conform to the CCIX specification, and is simply random.
18     int log_len = (rand() % 5 + 1) * 32;
19 
20     //Create random bytes.
21     int size = 16 + log_len;
22     UINT8* bytes = generate_random_bytes(size);
23 
24     //Set reserved areas to zero.
25     UINT64* validation = (UINT64*)(bytes + 4);
26     *validation &= 0b111; //Validation bits 3-63.
27     *(bytes + 13) &= 0b11111; //CCIX port ID bits 5-7.
28     UINT16* reserved = (UINT16*)(bytes + 14);
29     *reserved = 0; //Reserved bytes 14-15.
30 
31     //Set expected values.
32     UINT32* length = (UINT32*)bytes;
33     *length = size;
34 
35     //Set return values, exit.
36     *location = bytes;
37     return size;
38 }