diff options
| -rw-r--r-- | hw/pci_bridge.c | 22 | ||||
| -rw-r--r-- | hw/pci_internals.h | 15 |
2 files changed, 24 insertions, 13 deletions
diff --git a/hw/pci_bridge.c b/hw/pci_bridge.c index 25e9b7c..b6287cd 100644 --- a/hw/pci_bridge.c +++ b/hw/pci_bridge.c @@ -160,26 +160,25 @@ static void pci_bridge_cleanup_alias(MemoryRegion *alias, static void pci_bridge_region_init(PCIBridge *br) { - PCIBus *sec_bus = &br->sec_bus; PCIBus *parent = br->dev.bus; uint16_t cmd = pci_get_word(br->dev.config + PCI_COMMAND); pci_bridge_init_alias(br, &br->alias_pref_mem, PCI_BASE_ADDRESS_MEM_PREFETCH, "pci_bridge_pref_mem", - sec_bus->address_space_mem, + &br->address_space_mem, parent->address_space_mem, cmd & PCI_COMMAND_MEMORY); pci_bridge_init_alias(br, &br->alias_mem, PCI_BASE_ADDRESS_SPACE_MEMORY, "pci_bridge_mem", - sec_bus->address_space_mem, + &br->address_space_mem, parent->address_space_mem, cmd & PCI_COMMAND_MEMORY); pci_bridge_init_alias(br, &br->alias_io, PCI_BASE_ADDRESS_SPACE_IO, "pci_bridge_io", - sec_bus->address_space_io, + &br->address_space_io, parent->address_space_io, cmd & PCI_COMMAND_IO); /* TODO: optinal VGA and VGA palette snooping support. */ @@ -319,10 +318,10 @@ int pci_bridge_initfn(PCIDevice *dev) br->bus_name); sec_bus->parent_dev = dev; sec_bus->map_irq = br->map_irq; - sec_bus->address_space_mem = g_new(MemoryRegion, 1); - memory_region_init(sec_bus->address_space_mem, "pci_pridge_pci", INT64_MAX); - sec_bus->address_space_io = g_new(MemoryRegion, 1); - memory_region_init(sec_bus->address_space_io, "pci_bridge_io", 65536); + sec_bus->address_space_mem = &br->address_space_mem; + memory_region_init(&br->address_space_mem, "pci_pridge_pci", INT64_MAX); + sec_bus->address_space_io = &br->address_space_io; + memory_region_init(&br->address_space_io, "pci_bridge_io", 65536); pci_bridge_region_init(br); QLIST_INIT(&sec_bus->child); QLIST_INSERT_HEAD(&parent->child, sec_bus, sibling); @@ -333,14 +332,11 @@ int pci_bridge_initfn(PCIDevice *dev) int pci_bridge_exitfn(PCIDevice *pci_dev) { PCIBridge *s = DO_UPCAST(PCIBridge, dev, pci_dev); - PCIBus *sec_bus = &s->sec_bus; assert(QLIST_EMPTY(&s->sec_bus.child)); QLIST_REMOVE(&s->sec_bus, sibling); pci_bridge_region_cleanup(s); - memory_region_destroy(sec_bus->address_space_mem); - g_free(sec_bus->address_space_mem); - memory_region_destroy(sec_bus->address_space_io); - g_free(sec_bus->address_space_io); + memory_region_destroy(&s->address_space_mem); + memory_region_destroy(&s->address_space_io); /* qbus_free() is called automatically by qdev_free() */ return 0; } diff --git a/hw/pci_internals.h b/hw/pci_internals.h index 71c8b51..96690b7 100644 --- a/hw/pci_internals.h +++ b/hw/pci_internals.h @@ -41,6 +41,21 @@ struct PCIBridge { /* private member */ PCIBus sec_bus; + /* + * Memory regions for the bridge's address spaces. These regions are not + * directly added to system_memory/system_io or its descendants. + * Bridge's secondary bus points to these, so that devices + * under the bridge see these regions as its address spaces. + * The regions are as large as the entire address space - + * they don't take into account any windows. + */ + MemoryRegion address_space_mem; + MemoryRegion address_space_io; + /* + * Aliases for each of the address space windows that the bridge + * can forward. Mapped into the bridge's parent's address space, + * as subregions. + */ MemoryRegion alias_pref_mem; MemoryRegion alias_mem; MemoryRegion alias_io; |