hw/dec_pci.c

   1 /*
   2  * QEMU DEC 21154 PCI bridge
   3  *
   4  * Copyright (c) 2006-2007 Fabrice Bellard
   5  * Copyright (c) 2007 Jocelyn Mayer
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #include "dec_pci.h"
  27 #include "sysbus.h"
  28 #include "pci.h"
  29 #include "pci_host.h"
  30 #include "pci_bridge.h"
  31 #include "pci_internals.h"
  32
  33 /* debug DEC */
  34 //#define DEBUG_DEC
  35
  36 #ifdef DEBUG_DEC
  37 #define DEC_DPRINTF(fmt, ...)                               \
  38     do { printf("DEC: " fmt , ## __VA_ARGS__); } while (0)
  39 #else
  40 #define DEC_DPRINTF(fmt, ...)
  41 #endif
  42
  43 typedef struct DECState {
  44     SysBusDevice busdev;
  45     PCIHostState host_state;
  46 } DECState;
  47
  48 static int dec_map_irq(PCIDevice *pci_dev, int irq_num)
  49 {
  50     return irq_num;
  51 }
  52
  53 static PCIDeviceInfo dec_21154_pci_bridge_info = {
  54     .qdev.name = "dec-21154-p2p-bridge",
  55     .qdev.desc = "DEC 21154 PCI-PCI bridge",
  56     .qdev.size = sizeof(PCIBridge),
  57     .qdev.vmsd = &vmstate_pci_device,
  58     .qdev.reset = pci_bridge_reset,
  59     .init = pci_bridge_initfn,
  60     .exit = pci_bridge_exitfn,
  61     .vendor_id = PCI_VENDOR_ID_DEC,
  62     .device_id = PCI_DEVICE_ID_DEC_21154,
  63     .config_write = pci_bridge_write_config,
  64     .is_bridge = 1,
  65 };
  66
  67 PCIBus *pci_dec_21154_init(PCIBus *parent_bus, int devfn)
  68 {
  69     PCIDevice *dev;
  70     PCIBridge *br;
  71
  72     dev = pci_create_multifunction(parent_bus, devfn, false,
  73                                    "dec-21154-p2p-bridge");
  74     br = DO_UPCAST(PCIBridge, dev, dev);
  75     pci_bridge_map_irq(br, "DEC 21154 PCI-PCI bridge", dec_map_irq);
  76     qdev_init_nofail(&dev->qdev);
  77     return pci_bridge_get_sec_bus(br);
  78 }
  79
  80 static int pci_dec_21154_init_device(SysBusDevice *dev)
  81 {
  82     DECState *s;
  83     int pci_mem_config, pci_mem_data;
  84
  85     s = FROM_SYSBUS(DECState, dev);
  86
  87     pci_mem_config = pci_host_conf_register_mmio(&s->host_state,
  88                                                  DEVICE_LITTLE_ENDIAN);
  89     pci_mem_data = pci_host_data_register_mmio(&s->host_state,
  90                                                DEVICE_LITTLE_ENDIAN);
  91     sysbus_init_mmio(dev, 0x1000, pci_mem_config);
  92     sysbus_init_mmio(dev, 0x1000, pci_mem_data);
  93     return 0;
  94 }
  95
  96 static int dec_21154_pci_host_init(PCIDevice *d)
  97 {
  98     /* PCI2PCI bridge same values as PearPC - check this */
  99     return 0;
 100 }
 101
 102 static PCIDeviceInfo dec_21154_pci_host_info = {
 103     .qdev.name = "dec-21154",
 104     .qdev.size = sizeof(PCIDevice),
 105     .init      = dec_21154_pci_host_init,
 106     .vendor_id = PCI_VENDOR_ID_DEC,
 107     .device_id = PCI_DEVICE_ID_DEC_21154,
 108     .revision = 0x02,
 109     .class_id = PCI_CLASS_BRIDGE_PCI,
 110     .is_bridge  = 1,
 111 };
 112
 113 static void dec_register_devices(void)
 114 {
 115     sysbus_register_dev("dec-21154", sizeof(DECState),
 116                         pci_dec_21154_init_device);
 117     pci_qdev_register(&dec_21154_pci_host_info);
 118     pci_qdev_register(&dec_21154_pci_bridge_info);
 119 }
 120
 121 device_init(dec_register_devices)