diff options
Diffstat (limited to 'hw/pci_bridge.c')
| -rw-r--r-- | hw/pci_bridge.c | 122 |
1 files changed, 69 insertions, 53 deletions
diff --git a/hw/pci_bridge.c b/hw/pci_bridge.c index 2f13c7dd5d..198c3c7908 100644 --- a/hw/pci_bridge.c +++ b/hw/pci_bridge.c @@ -32,12 +32,19 @@ #include "pci_bridge.h" #include "pci_internals.h" +/* Accessor function to get parent bridge device from pci bus. */ PCIDevice *pci_bridge_get_device(PCIBus *bus) { return bus->parent_dev; } -static uint32_t pci_config_get_io_base(PCIDevice *d, +/* Accessor function to get secondary bus from pci-to-pci bridge device */ +PCIBus *pci_bridge_get_sec_bus(PCIBridge *br) +{ + return &br->sec_bus; +} + +static uint32_t pci_config_get_io_base(const PCIDevice *d, uint32_t base, uint32_t base_upper16) { uint32_t val; @@ -49,13 +56,13 @@ static uint32_t pci_config_get_io_base(PCIDevice *d, return val; } -static pcibus_t pci_config_get_memory_base(PCIDevice *d, uint32_t base) +static pcibus_t pci_config_get_memory_base(const PCIDevice *d, uint32_t base) { return ((pcibus_t)pci_get_word(d->config + base) & PCI_MEMORY_RANGE_MASK) << 16; } -static pcibus_t pci_config_get_pref_base(PCIDevice *d, +static pcibus_t pci_config_get_pref_base(const PCIDevice *d, uint32_t base, uint32_t upper) { pcibus_t tmp; @@ -69,7 +76,8 @@ static pcibus_t pci_config_get_pref_base(PCIDevice *d, return val; } -pcibus_t pci_bridge_get_base(PCIDevice *bridge, uint8_t type) +/* accessor function to get bridge filtering base address */ +pcibus_t pci_bridge_get_base(const PCIDevice *bridge, uint8_t type) { pcibus_t base; if (type & PCI_BASE_ADDRESS_SPACE_IO) { @@ -87,7 +95,8 @@ pcibus_t pci_bridge_get_base(PCIDevice *bridge, uint8_t type) return base; } -pcibus_t pci_bridge_get_limit(PCIDevice *bridge, uint8_t type) +/* accessor funciton to get bridge filtering limit */ +pcibus_t pci_bridge_get_limit(const PCIDevice *bridge, uint8_t type) { pcibus_t limit; if (type & PCI_BASE_ADDRESS_SPACE_IO) { @@ -106,7 +115,8 @@ pcibus_t pci_bridge_get_limit(PCIDevice *bridge, uint8_t type) return limit; } -static void pci_bridge_write_config(PCIDevice *d, +/* default write_config function for PCI-to-PCI bridge */ +void pci_bridge_write_config(PCIDevice *d, uint32_t address, uint32_t val, int len) { pci_default_write_config(d, address, val, len); @@ -122,12 +132,41 @@ static void pci_bridge_write_config(PCIDevice *d, } } -static int pci_bridge_initfn(PCIDevice *dev) +/* reset bridge specific configuration registers */ +void pci_bridge_reset_reg(PCIDevice *dev) +{ + uint8_t *conf = dev->config; + + conf[PCI_PRIMARY_BUS] = 0; + conf[PCI_SECONDARY_BUS] = 0; + conf[PCI_SUBORDINATE_BUS] = 0; + conf[PCI_SEC_LATENCY_TIMER] = 0; + + conf[PCI_IO_BASE] = 0; + conf[PCI_IO_LIMIT] = 0; + pci_set_word(conf + PCI_MEMORY_BASE, 0); + pci_set_word(conf + PCI_MEMORY_LIMIT, 0); + pci_set_word(conf + PCI_PREF_MEMORY_BASE, 0); + pci_set_word(conf + PCI_PREF_MEMORY_LIMIT, 0); + pci_set_word(conf + PCI_PREF_BASE_UPPER32, 0); + pci_set_word(conf + PCI_PREF_LIMIT_UPPER32, 0); + + pci_set_word(conf + PCI_BRIDGE_CONTROL, 0); +} + +/* default reset function for PCI-to-PCI bridge */ +void pci_bridge_reset(DeviceState *qdev) { - PCIBridge *s = DO_UPCAST(PCIBridge, dev, dev); + PCIDevice *dev = DO_UPCAST(PCIDevice, qdev, qdev); + pci_bridge_reset_reg(dev); +} - pci_config_set_vendor_id(s->dev.config, s->vid); - pci_config_set_device_id(s->dev.config, s->did); +/* default qdev initialization function for PCI-to-PCI bridge */ +int pci_bridge_initfn(PCIDevice *dev) +{ + PCIBus *parent = dev->bus; + PCIBridge *br = DO_UPCAST(PCIBridge, dev, dev); + PCIBus *sec_bus = &br->sec_bus; pci_set_word(dev->config + PCI_STATUS, PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK); @@ -137,58 +176,35 @@ static int pci_bridge_initfn(PCIDevice *dev) PCI_HEADER_TYPE_BRIDGE; pci_set_word(dev->config + PCI_SEC_STATUS, PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK); + + qbus_create_inplace(&sec_bus->qbus, &pci_bus_info, &dev->qdev, + br->bus_name); + sec_bus->parent_dev = dev; + sec_bus->map_irq = br->map_irq; + + QLIST_INIT(&sec_bus->child); + QLIST_INSERT_HEAD(&parent->child, sec_bus, sibling); return 0; } -static int pci_bridge_exitfn(PCIDevice *pci_dev) +/* default qdev clean up function for PCI-to-PCI bridge */ +int pci_bridge_exitfn(PCIDevice *pci_dev) { PCIBridge *s = DO_UPCAST(PCIBridge, dev, pci_dev); assert(QLIST_EMPTY(&s->sec_bus.child)); QLIST_REMOVE(&s->sec_bus, sibling); + /* qbus_free() is called automatically by qdev_free() */ return 0; } -PCIBus *pci_bridge_init(PCIBus *bus, int devfn, bool multifunction, - uint16_t vid, uint16_t did, - pci_map_irq_fn map_irq, const char *name) -{ - PCIDevice *dev; - PCIBridge *s; - PCIBus *sec_bus; - - dev = pci_create_multifunction(bus, devfn, multifunction, "pci-bridge"); - qdev_prop_set_uint32(&dev->qdev, "vendorid", vid); - qdev_prop_set_uint32(&dev->qdev, "deviceid", did); - qdev_init_nofail(&dev->qdev); - - s = DO_UPCAST(PCIBridge, dev, dev); - sec_bus = &s->sec_bus; - qbus_create_inplace(&sec_bus->qbus, &pci_bus_info, &dev->qdev, name); - sec_bus->parent_dev = dev; - sec_bus->map_irq = map_irq; - - QLIST_INIT(&sec_bus->child); - QLIST_INSERT_HEAD(&bus->child, sec_bus, sibling); - return &s->sec_bus; -} - -static PCIDeviceInfo bridge_info = { - .qdev.name = "pci-bridge", - .qdev.size = sizeof(PCIBridge), - .init = pci_bridge_initfn, - .exit = pci_bridge_exitfn, - .config_write = pci_bridge_write_config, - .is_bridge = 1, - .qdev.props = (Property[]) { - DEFINE_PROP_HEX32("vendorid", PCIBridge, vid, 0), - DEFINE_PROP_HEX32("deviceid", PCIBridge, did, 0), - DEFINE_PROP_END_OF_LIST(), - } -}; - -static void pci_register_devices(void) +/* + * before qdev initialization(qdev_init()), this function sets bus_name and + * map_irq callback which are necessry for pci_bridge_initfn() to + * initialize bus. + */ +void pci_bridge_map_irq(PCIBridge *br, const char* bus_name, + pci_map_irq_fn map_irq) { - pci_qdev_register(&bridge_info); + br->map_irq = map_irq; + br->bus_name = bus_name; } - -device_init(pci_register_devices) |