1 /**
2  * Functions for generating pseudo-random CPER PCI/PCI-X bus 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/PCI-X bus error section, saving the resulting address to the given
13 //location. Returns the size of the newly created section.
generate_section_pci_bus(void ** location)14 size_t generate_section_pci_bus(void **location)
15 {
16 	//Create random bytes.
17 	int size = 72;
18 	UINT8 *bytes = generate_random_bytes(size);
19 
20 	//Set reserved areas to zero.
21 	UINT64 *validation = (UINT64 *)bytes;
22 	*validation &= 0x1FF; //Validation 9-63
23 	UINT32 *reserved = (UINT32 *)(bytes + 20);
24 	*reserved = 0;
25 	UINT64 *bus_command = (UINT64 *)(bytes + 40);
26 	*bus_command &= ((UINT64)0x1 << 56); //Bus command bytes bar bit 56.
27 
28 	//Fix values that could be above range.
29 	UINT16 *error_type = (UINT16 *)(bytes + 16);
30 	*error_type = rand() % 8;
31 
32 	//Fix error status.
33 	create_valid_error_section(bytes + 8);
34 
35 	//Set return values, exit.
36 	*location = bytes;
37 	return size;
38 }
39