ClientBW::ClientBW() :
fd(-1),
mmapAddr(NULL)
{
int handle = ::open("/dev/mem", O_RDONLY);
if (handle < 0) throw std::exception();
fd = handle;
PciHandleM imcHandle(0,0,0,0); // memory controller device coordinates: domain 0, bus 0, device 0, function 0
uint64 imcbar = 0;
imcHandle.read64(PCM_CLIENT_IMC_BAR_OFFSET, &imcbar);
// std::cout << "DEBUG: imcbar="<<std::hex << imcbar <<std::endl;
if(!imcbar)
{
std::cerr <<"ERROR: imcbar is zero." << std::endl;
throw std::exception();
}
uint64 startAddr = imcbar & (~(4096-1)); // round down to 4K
// std::cout << "DEBUG: startAddr="<<std::hex << startAddr <<std::endl;
mmapAddr = (char*) mmap(NULL, PCM_CLIENT_IMC_MMAP_SIZE, PROT_READ, MAP_SHARED , fd, startAddr);
if(mmapAddr == MAP_FAILED)
{
std::cout << "mmap failed: errno is "<< errno<< " ("<< strerror(errno) << ")"<< std::endl;
throw std::exception();
}
}
ClientBW::ClientBW() : pmem(new PCMPmem())
{
pmem->install_driver(false);
pmem->set_acquisition_mode(PMEM_MODE_IOSPACE);
PciHandleM imcHandle(0,0,0,0); // memory controller device coordinates: domain 0, bus 0, device 0, function 0
uint64 imcbar = 0;
imcHandle.read64(PCM_CLIENT_IMC_BAR_OFFSET, &imcbar);
// std::cout << "DEBUG: imcbar="<<std::hex << imcbar <<std::endl;
if(!imcbar)
{
std::cerr <<"ERROR: imcbar is zero." << std::endl;
throw std::exception();
}
startAddr = imcbar & (~(4096ULL-1ULL)); // round down to 4K
}
