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 int dec_21154_initfn(PCIDevice *dev)
  54 {
  55     int rc;
  56
  57     rc = pci_bridge_initfn(dev);
  58     if (rc < 0) {
  59         return rc;
  60     }
  61
  62     pci_config_set_vendor_id(dev->config, PCI_VENDOR_ID_DEC);
  63     pci_config_set_device_id(dev->config, PCI_DEVICE_ID_DEC_21154);
  64     return 0;
  65 }
  66
  67 static PCIDeviceInfo dec_21154_pci_bridge_info = {
  68     .qdev.name = "dec-21154-p2p-bridge",
  69     .qdev.desc = "DEC 21154 PCI-PCI bridge",
  70     .qdev.size = sizeof(PCIBridge),
  71     .qdev.vmsd = &vmstate_pci_device,
  72     .qdev.reset = pci_bridge_reset,
  73     .init = dec_21154_initfn,
  74     .exit = pci_bridge_exitfn,
  75     .config_write = pci_bridge_write_config,
  76     .is_bridge = 1,
  77 };
  78
  79 PCIBus *pci_dec_21154_init(PCIBus *parent_bus, int devfn)
  80 {
  81     PCIDevice *dev;
  82     PCIBridge *br;
  83
  84     dev = pci_create_multifunction(parent_bus, devfn, false,
  85                                    "dec-21154-p2p-bridge");
  86     br = DO_UPCAST(PCIBridge, dev, dev);
  87     pci_bridge_map_irq(br, "DEC 21154 PCI-PCI bridge", dec_map_irq);
  88     qdev_init_nofail(&dev->qdev);
  89     return pci_bridge_get_sec_bus(br);
  90 }
  91
  92 static int pci_dec_21154_init_device(SysBusDevice *dev)
  93 {
  94     DECState *s;
  95     int pci_mem_config, pci_mem_data;
  96
  97     s = FROM_SYSBUS(DECState, dev);
  98
  99     pci_mem_config = pci_host_conf_register_mmio(&s->host_state,
 100                                                  DEVICE_LITTLE_ENDIAN);
 101     pci_mem_data = pci_host_data_register_mmio(&s->host_state,
 102                                                DEVICE_LITTLE_ENDIAN);
 103     sysbus_init_mmio(dev, 0x1000, pci_mem_config);
 104     sysbus_init_mmio(dev, 0x1000, pci_mem_data);
 105     return 0;
 106 }
 107
 108 static int dec_21154_pci_host_init(PCIDevice *d)
 109 {
 110     /* PCI2PCI bridge same values as PearPC - check this */
 111     pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_DEC);
 112     pci_config_set_device_id(d->config, PCI_DEVICE_ID_DEC_21154);
 113     pci_set_byte(d->config + PCI_REVISION_ID, 0x02);
 114     pci_config_set_class(d->config, PCI_CLASS_BRIDGE_PCI);
 115     return 0;
 116 }
 117
 118 static PCIDeviceInfo dec_21154_pci_host_info = {
 119     .qdev.name = "dec-21154",
 120     .qdev.size = sizeof(PCIDevice),
 121     .init      = dec_21154_pci_host_init,
 122     .is_bridge  = 1,
 123 };
 124
 125 static void dec_register_devices(void)
 126 {
 127     sysbus_register_dev("dec-21154", sizeof(DECState),
 128                         pci_dec_21154_init_device);
 129     pci_qdev_register(&dec_21154_pci_host_info);
 130     pci_qdev_register(&dec_21154_pci_bridge_info);
 131 }
 132
 133 device_init(dec_register_devices)