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

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

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

//Generates a single pseudo-random PCI component error section, saving the resulting address to the given
//location. Returns the size of the newly created section.
size_t generate_section_pci_dev(void** location)
{
    //Generate how many register pairs will be attached to this section.
    UINT32 num_memory_pairs = rand() % 4;
    UINT32 num_io_pairs = rand() % 4;
    UINT32 num_registers = num_memory_pairs + num_io_pairs;

    //Create random bytes.
    int size = 40 + (num_registers * 16);
    UINT8* bytes = generate_random_bytes(size);
    
    //Set reserved areas to zero.
    UINT64* validation = (UINT64*)bytes;
    *validation &= 0b11111; //Validation 5-63
    for (int i=0; i<5; i++)
        *(bytes + 27 + i) = 0; //Bytes 11-15 of ID info.
        
    //Set expected values.
    UINT32* memory_number_field = (UINT32*)(bytes + 32);
    UINT32* io_number_field = (UINT32*)(bytes + 36);
    *memory_number_field = num_memory_pairs;
    *io_number_field = num_io_pairs;

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

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