hw/pci-bridge/simba.c

   1 /*
   2  * QEMU Simba PCI bridge
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  * Copyright (c) 2012,2013 Artyom Tarasenko
   6  * Copyright (c) 2018 Mark Cave-Ayland
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26
  27 #include "qemu/osdep.h"
  28 #include "hw/pci/pci.h"
  29 #include "hw/pci/pci_bridge.h"
  30 #include "hw/pci/pci_bus.h"
  31 #include "qemu/module.h"
  32 #include "hw/pci-bridge/simba.h"
  33
  34 /*
  35  * Chipset docs:
  36  * APB: "Advanced PCI Bridge (APB) User's Manual",
  37  * http://www.sun.com/processors/manuals/805-1251.pdf
  38  */
  39
  40 static void simba_pci_bridge_realize(PCIDevice *dev, Error **errp)
  41 {
  42     /*
  43      * command register:
  44      * According to PCI bridge spec, after reset
  45      *   bus master bit is off
  46      *   memory space enable bit is off
  47      * According to manual (805-1251.pdf).
  48      *   the reset value should be zero unless the boot pin is tied high
  49      *   (which is true) and thus it should be PCI_COMMAND_MEMORY.
  50      */
  51     SimbaPCIBridge *br = SIMBA_PCI_BRIDGE(dev);
  52
  53     pci_bridge_initfn(dev, TYPE_PCI_BUS);
  54
  55     pci_set_word(dev->config + PCI_COMMAND, PCI_COMMAND_MEMORY);
  56     pci_set_word(dev->config + PCI_STATUS,
  57                  PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ |
  58                  PCI_STATUS_DEVSEL_MEDIUM);
  59
  60     /* Allow 32-bit IO addresses */
  61     pci_set_word(dev->config + PCI_IO_BASE, PCI_IO_RANGE_TYPE_32);
  62     pci_set_word(dev->config + PCI_IO_LIMIT, PCI_IO_RANGE_TYPE_32);
  63     pci_set_word(dev->wmask + PCI_IO_BASE_UPPER16, 0xffff);
  64     pci_set_word(dev->wmask + PCI_IO_LIMIT_UPPER16, 0xffff);
  65
  66     pci_bridge_update_mappings(PCI_BRIDGE(br));
  67 }
  68
  69 static void simba_pci_bridge_class_init(ObjectClass *klass, void *data)
  70 {
  71     DeviceClass *dc = DEVICE_CLASS(klass);
  72     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
  73
  74     k->realize = simba_pci_bridge_realize;
  75     k->exit = pci_bridge_exitfn;
  76     k->vendor_id = PCI_VENDOR_ID_SUN;
  77     k->device_id = PCI_DEVICE_ID_SUN_SIMBA;
  78     k->revision = 0x11;
  79     k->config_write = pci_bridge_write_config;
  80     k->is_bridge = true;
  81     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
  82     dc->reset = pci_bridge_reset;
  83     dc->vmsd = &vmstate_pci_device;
  84 }
  85
  86 static const TypeInfo simba_pci_bridge_info = {
  87     .name          = TYPE_SIMBA_PCI_BRIDGE,
  88     .parent        = TYPE_PCI_BRIDGE,
  89     .class_init    = simba_pci_bridge_class_init,
  90     .instance_size = sizeof(SimbaPCIBridge),
  91     .interfaces = (InterfaceInfo[]) {
  92         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
  93         { },
  94     },
  95 };
  96
  97 static void simba_register_types(void)
  98 {
  99     type_register_static(&simba_pci_bridge_info);
 100 }
 101
 102 type_init(simba_register_types)