Archipelago » qemu

/*

 * ARM Versatile/PB PCI host controller

 *

 * Copyright (c) 2006-2009 CodeSourcery.

 * Written by Paul Brook

 *

 * This code is licensed under the LGPL.

 */

#include "sysbus.h"

#include "pci.h"

#include "pci_host.h"

#include "exec-memory.h"

typedef struct {

    SysBusDevice busdev;

    qemu_irq irq[4];

    int realview;

    MemoryRegion mem_config;

    MemoryRegion mem_config2;

    MemoryRegion isa;

} PCIVPBState;

static inline uint32_t vpb_pci_config_addr(target_phys_addr_t addr)

{

    return addr & 0xffffff;

}

static void pci_vpb_config_write(void *opaque, target_phys_addr_t addr,

                                 uint64_t val, unsigned size)

{

    pci_data_write(opaque, vpb_pci_config_addr(addr), val, size);

}

static uint64_t pci_vpb_config_read(void *opaque, target_phys_addr_t addr,

                                    unsigned size)

{

    uint32_t val;

    val = pci_data_read(opaque, vpb_pci_config_addr(addr), size);

    return val;

}

static const MemoryRegionOps pci_vpb_config_ops = {

    .read = pci_vpb_config_read,

    .write = pci_vpb_config_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static int pci_vpb_map_irq(PCIDevice *d, int irq_num)

{

    return irq_num;

}

static void pci_vpb_set_irq(void *opaque, int irq_num, int level)

{

    qemu_irq *pic = opaque;

    qemu_set_irq(pic[irq_num], level);

}

static void pci_vpb_map(SysBusDevice *dev, target_phys_addr_t base)

{

    PCIVPBState *s = (PCIVPBState *)dev;

    /* Selfconfig area.  */

    memory_region_add_subregion(get_system_memory(), base + 0x01000000,

                                &s->mem_config);

    /* Normal config area.  */

    memory_region_add_subregion(get_system_memory(), base + 0x02000000,

                                &s->mem_config2);

    if (s->realview) {

        /* IO memory area.  */

        memory_region_add_subregion(get_system_memory(), base + 0x03000000,

                                    &s->isa);

    }

}

static void pci_vpb_unmap(SysBusDevice *dev, target_phys_addr_t base)

{

    PCIVPBState *s = (PCIVPBState *)dev;

    /* Selfconfig area.  */

    memory_region_del_subregion(get_system_memory(), &s->mem_config);

    /* Normal config area.  */

    memory_region_del_subregion(get_system_memory(), &s->mem_config2);

    if (s->realview) {

        /* IO memory area.  */

        memory_region_del_subregion(get_system_memory(), &s->isa);

    }

}

static int pci_vpb_init(SysBusDevice *dev)

{

    PCIVPBState *s = FROM_SYSBUS(PCIVPBState, dev);

    PCIBus *bus;

    int i;

    for (i = 0; i < 4; i++) {

        sysbus_init_irq(dev, &s->irq[i]);

    }

    bus = pci_register_bus(&dev->qdev, "pci",

                           pci_vpb_set_irq, pci_vpb_map_irq, s->irq,

                           get_system_memory(), get_system_io(),

                           PCI_DEVFN(11, 0), 4);

    /* ??? Register memory space.  */

    memory_region_init_io(&s->mem_config, &pci_vpb_config_ops, bus,

                          "pci-vpb-selfconfig", 0x1000000);

    memory_region_init_io(&s->mem_config2, &pci_vpb_config_ops, bus,

                          "pci-vpb-config", 0x1000000);

    if (s->realview) {

        isa_mmio_setup(&s->isa, 0x0100000);

    }

    sysbus_init_mmio_cb2(dev, pci_vpb_map, pci_vpb_unmap);

    pci_create_simple(bus, -1, "versatile_pci_host");

    return 0;

}

static int pci_realview_init(SysBusDevice *dev)

{

    PCIVPBState *s = FROM_SYSBUS(PCIVPBState, dev);

    s->realview = 1;

    return pci_vpb_init(dev);

}

static int versatile_pci_host_init(PCIDevice *d)

{

    pci_set_word(d->config + PCI_STATUS,

                 PCI_STATUS_66MHZ | PCI_STATUS_DEVSEL_MEDIUM);

    pci_set_byte(d->config + PCI_LATENCY_TIMER, 0x10);

    return 0;

}

static PCIDeviceInfo versatile_pci_host_info = {

    .qdev.name = "versatile_pci_host",

    .qdev.size = sizeof(PCIDevice),

    .init      = versatile_pci_host_init,

    .vendor_id = PCI_VENDOR_ID_XILINX,

    /* Both boards have the same device ID.  Oh well.  */

    .device_id = PCI_DEVICE_ID_XILINX_XC2VP30,

    .class_id  = PCI_CLASS_PROCESSOR_CO,

};

static void versatile_pci_register_devices(void)

{

    sysbus_register_dev("versatile_pci", sizeof(PCIVPBState), pci_vpb_init);

    sysbus_register_dev("realview_pci", sizeof(PCIVPBState),

                        pci_realview_init);

    pci_qdev_register(&versatile_pci_host_info);

}

device_init(versatile_pci_register_devices)