dev_c3600_iofpga.c

思科路由器仿真器,用来仿7200系列得,可以在电脑上模拟路由器-Cisco router simulator, used to fake a 7200 series can be simulated

         } else {
            cpu_log(cpu,"IO_FPGA",
                    "write to unknown addr 0x%x, value=0x%llx, "
                    "pc=0x%llx (size=%u)\n",offset,*data,cpu->pc,op_size);
         }
#endif
   }

   return NULL;
}

/*
 * dev_c3660_iofpga_access()
 */
static void *
dev_c3660_iofpga_access(cpu_mips_t *cpu,struct vdevice *dev,
                        m_uint32_t offset,u_int op_size,u_int op_type,
                        m_uint64_t *data)
{
   struct iofpga_data *d = dev->priv_data;
   u_int slot;

   if (op_type == MTS_READ)
      *data = 0x0;

#if DEBUG_ACCESS
   if (offset != 0x0c) {
      if (op_type == MTS_READ) {
         cpu_log(cpu,"IO_FPGA","reading reg 0x%x at pc=0x%llx (size=%u)\n",
                 offset,cpu->pc,op_size);
      } else {
         cpu_log(cpu,"IO_FPGA",
                 "writing reg 0x%x at pc=0x%llx, data=0x%llx (size=%u)\n",
                 offset,cpu->pc,*data,op_size);
      }
   }
#endif

   switch(offset) {
      /* 
       * 0x7d00 is written here regularly.
       * Some kind of hardware watchdog ?
       */     
      case 0x0000c:
         break;

      /* Probably flash protection (if 0, no write access allowed) */
      case 0x00008:
         if (op_type == MTS_READ)
            *data = 0xFF;
         break;

      /* Bootflash of 8 Mb */
      case 0x0000a:
         if (op_type == MTS_READ)
            *data = 0x1000;
         break;

      /* NM presence - slots 1 to 4 */
      case 0x10006:
         if (op_type == MTS_READ)
            *data = nm_get_status_2(d,0);
         break;

      /* NM presence - slot 5 to 6 */
      case 0x10008:
         if (op_type == MTS_READ)
            *data = nm_get_status_2(d,1);
         break;
      
      /* Fan status, PS presence */
      case 0x10018:
         if (op_type == MTS_READ)
            *data = 0x0000;
         break;

      /* unknown, read by env monitor */
      case 0x1001a: 
         if (op_type == MTS_READ)
            *data = 0x0000;
         break;

      /* board temperature */
      case 0x30004:
         if (op_type == MTS_READ) {
            *data = 32 + 1;
         }
         break;

      /* sh c3600: Per Slot Intr Mask */
      case 0x10016:
         if (op_type == MTS_READ)
            *data = 0x12;
         break;

      /* sh c3600: OIR fsm state slot's (12) */
      case 0x10020:
         if (op_type == MTS_READ)
            *data = 0x00;
         break;

      /* sh c3600: OIR fsm state slot's (34) */
      case 0x10022:
         if (op_type == MTS_READ)
            *data = 0x00;
         break;

      /* sh c3600: OIR fsm state slot's (56) */
      case 0x10024:
         if (op_type == MTS_READ)
            *data = 0x00;
         break;

      /* 
       * Backplane EEPROM.
       *
       * Bit 7: 0=Telco chassis, 1=Enterprise chassis.
       */
      case 0x10000:
         if (op_type == MTS_WRITE)
            nmc93c46_write(&d->router->mb_eeprom_group,(u_int)(*data));
         else
            *data = nmc93c46_read(&d->router->mb_eeprom_group) | 0x80;
         break;

      /* NM EEPROMs - slots 1 to 6 */
      case 0x1000a:
      case 0x1000b:
      case 0x1000c:
      case 0x1000d:
      case 0x1000e:
      case 0x1000f:
         slot = (offset - 0x1000a) + 1;

         if (op_type == MTS_WRITE) {
            nmc93c46_write(&d->router->c3660_nm_eeprom_group[slot],
                           (u_int)(*data));
         } else {
            *data = nmc93c46_read(&d->router->c3660_nm_eeprom_group[slot]);
         }
         break;

      /* NM EEPROM - slot 0 */
      case 0x20006:
         if (op_type == MTS_WRITE) {
            nmc93c46_write(&d->router->c3660_nm_eeprom_group[0],
                           (u_int)(*data));
         } else {
            *data = nmc93c46_read(&d->router->c3660_nm_eeprom_group[0]);
         }
         break;

      /* Unknown EEPROMs ? */
      case 0x20000:
      case 0x20002:
      case 0x20004:
         if (op_type == MTS_READ)
            *data = 0xFFFF;
         break;

      /* IO Mask (displayed by "show c3600") */
      case 0x20008:
         if (op_type == MTS_READ)
            *data = d->io_mask;
         else
            d->io_mask = *data;
         break;

      /* 0: 3640, 4 << 5: 3620, 3 << 5: 3660 */
      case 0x30000:
         if (op_type == MTS_READ)            
            *data = 3 << 5;
         break;

      /* ??? */   
      case 0x30008:
        if (op_type == MTS_READ)
           *data = 0xFF;
        break;

      /* 
       * Read at net interrupt (size 4).
       * It seems that there are 4 lines per slot.
       *
       *   Bit 24-27: slot 1
       *   Bit 16-19: slot 2
       *   Bit 28-31: slot 3
       *   Bit 20-23: slot 4
       *   Bit 08-11: slot 5
       *   Bit 00-03: slot 6
       *
       * Other bits are unknown.
       */
      case 0x10010:
         if (op_type == MTS_READ)
            *data = 0xFFFFFFFF;
         vm_clear_irq(d->router->vm,C3600_NETIO_IRQ);
         break;

      /* 
       * Read at net interrupt (size 1) 
       *
       *   Bit 7-6: we get "Unexpected AIM interrupt on AIM slot 1".
       *   Bit 5-4: we get "Unexpected AIM interrupt on AIM slot 0".
       *   Bit 0-3: net interrupt for slot 0.
       */        
      case 0x20010:
         if (op_type == MTS_READ)
            *data = 0x0F;
         break;

      /* 
       * Read when a PA Management interrupt is triggered.
       *
       * If not 0, we get:
       *   "Error: Unexpected NM Interrupt received from slot: x"
       */
      case 0x10014:
         if (op_type == MTS_READ)
            *data = 0x00;
         vm_clear_irq(d->router->vm,C3600_NM_MGMT_IRQ);
         break;

      /* 
       * Read when an external interrupt is triggered.
       *
       * Bit 4: 1 = %UNKNOWN-1-GT64010: Unknown fatal interrupt(s)
       * Bit 6: 1 = %OIRINT: OIR Event has occurred oir_ctrl 1000 oir_stat FFFF
       *
       * oir_ctrl = register 0x10004
       * oir_stat = register 0x10006
       */
      case 0x2000a:
         if (op_type == MTS_READ)
            *data = 0x54;
         vm_clear_irq(d->router->vm,C3600_EXT_IRQ);
         break;

#if DEBUG_UNKNOWN
      default:
         if (op_type == MTS_READ) {
            cpu_log(cpu,"IO_FPGA",
                    "read from unknown addr 0x%x, pc=0x%llx (size=%u)\n",
                    offset,cpu->pc,op_size);
         } else {
            cpu_log(cpu,"IO_FPGA",
                    "write to unknown addr 0x%x, value=0x%llx, "
                    "pc=0x%llx (size=%u)\n",offset,*data,cpu->pc,op_size);
         }
#endif
   }

   return NULL;
}

/* Initialize EEPROM groups */
void c3600_init_eeprom_groups(c3600_t *router)
{
   int i;

   /* Initialize Mainboard EEPROM */
   router->mb_eeprom_group = eeprom_mb_group;
   router->mb_eeprom_group.eeprom[0] = &router->mb_eeprom;
   router->mb_eeprom.data = NULL;
   router->mb_eeprom.len  = 0;

   /* Initialize NM EEPROM for 3620/3640 */
   router->nm_eeprom_group = eeprom_nm_group;
   router->nm_eeprom_group.eeprom[0] = NULL;

   /* Initialize NM EEPROM for 3660 */
   for(i=0;i<C3600_MAX_NM_BAYS;i++) {
      router->c3660_nm_eeprom_group[i] = eeprom_nm_group;
      router->c3660_nm_eeprom_group[i].eeprom[0] = &router->nm_bay[i].eeprom;
   }
}

/* Shutdown the IO FPGA device */
void dev_c3600_iofpga_shutdown(vm_instance_t *vm,struct iofpga_data *d)
{
   if (d != NULL) {
      /* Remove the device */
      dev_remove(vm,&d->dev);

      /* Free the structure itself */
      free(d);
   }
}

/*
 * dev_c3600_iofpga_init()
 */
int dev_c3600_iofpga_init(c3600_t *router,m_uint64_t paddr,m_uint32_t len)
{
   vm_instance_t *vm = router->vm;
   struct iofpga_data *d;

   /* Allocate private data structure */
   if (!(d = malloc(sizeof(*d)))) {
      fprintf(stderr,"IO_FPGA: out of memory\n");
      return(-1);
   }

   memset(d,0,sizeof(*d));
   d->router = router;

   vm_object_init(&d->vm_obj);
   d->vm_obj.name = "io_fpga";
   d->vm_obj.data = d;
   d->vm_obj.shutdown = (vm_shutdown_t)dev_c3600_iofpga_shutdown;

   /* Set device properties */
   dev_init(&d->dev);
   d->dev.name      = "io_fpga";
   d->dev.phys_addr = paddr;
   d->dev.phys_len  = len;
   d->dev.priv_data = d;

   switch(router->chassis_driver->chassis_id) {
      case 3620:
      case 3640:
         d->dev.handler = dev_c3620_c3640_iofpga_access;
         break;
      case 3660:
         d->dev.handler = dev_c3660_iofpga_access;
         break;
      default:
         fprintf(stderr,"C3600 '%s': invalid chassis ID %d\n",
                 router->vm->name,router->chassis_driver->chassis_id);
         free(d);
         return(-1);
   }

   /* Map this device to the VM */
   vm_bind_device(router->vm,&d->dev);
   vm_object_add(vm,&d->vm_obj);
   return(0);
}