generator/sections/gen-section-pci-bus.c

/**
 * Functions for generating pseudo-random CPER PCI/PCI-X bus error sections.
 *
 * Author: Lawrence.Tang@arm.com
 **/

#include <stdlib.h>
#include "../../edk/BaseTypes.h"
#include "../gen-utils.h"
#include "gen-section.h"

//Generates a single pseudo-random PCI/PCI-X bus error section, saving the resulting address to the given
//location. Returns the size of the newly created section.
size_t generate_section_pci_bus(void **location)
{
	//Create random bytes.
	int size = 72;
	UINT8 *bytes = generate_random_bytes(size);

	//Set reserved areas to zero.
	UINT64 *validation = (UINT64 *)bytes;
	*validation &= 0x1FF; //Validation 9-63
	UINT32 *reserved = (UINT32 *)(bytes + 20);
	*reserved = 0;
	UINT64 *bus_command = (UINT64 *)(bytes + 40);
	*bus_command &= ((UINT64)0x1 << 56); //Bus command bytes bar bit 56.

	//Fix values that could be above range.
	UINT16 *error_type = (UINT16 *)(bytes + 16);
	*error_type = rand() % 8;

	//Fix error status.
	create_valid_error_section(bytes + 8);

	//Set return values, exit.
	*location = bytes;
	return size;
}