func: static uint32_t pcihotplug_read(void *opaque, uint32_t addr)
  
  {
  
      uint32_t val = 0;
  
      struct pci_status *g = opaque;
  
      switch (addr) {
  
          case PCI_BASE:
  
              val = g->up;
  
              break;
  
          case PCI_BASE + 4:
  
              val = g->down;
  
              break;
  
          default:
  
              break;
  
      }
  
  
  
      PIIX4_DPRINTF("pcihotplug read %x == %x\n", addr, val);
  
      return val;
  
  }
  