[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 3/4] xen:hw:pci-host:piix: introduce xen_igd_i440fx_init
This is almost same as an original i440fx_init but just work with that xen igd host bridge to passthrough. Signed-off-by: Tiejun Chen <tiejun.chen@xxxxxxxxx> --- hw/pci-host/piix.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++ include/hw/i386/pc.h | 10 +++++++ 2 files changed, 89 insertions(+) diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c index 9feddf5..7ef08d7 100644 --- a/hw/pci-host/piix.c +++ b/hw/pci-host/piix.c @@ -407,6 +407,85 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state, return b; } +PCIBus *xen_igd_i440fx_init(PCII440FXState **pi440fx_state, + int *piix3_devfn, + ISABus **isa_bus, qemu_irq *pic, + MemoryRegion *address_space_mem, + MemoryRegion *address_space_io, + ram_addr_t ram_size, + ram_addr_t below_4g_mem_size, + ram_addr_t above_4g_mem_size, + MemoryRegion *pci_address_space, + MemoryRegion *ram_memory) +{ + DeviceState *dev; + PCIBus *b; + PCIDevice *d; + PCIHostState *s; + PIIX3State *piix3; + PCII440FXState *f; + unsigned i; + I440FXState *i440fx; + + dev = qdev_create(NULL, TYPE_I440FX_PCI_HOST_BRIDGE); + s = PCI_HOST_BRIDGE(dev); + b = pci_bus_new(dev, NULL, pci_address_space, + address_space_io, 0, TYPE_PCI_BUS); + s->bus = b; + object_property_add_child(qdev_get_machine(), "i440fx", OBJECT(dev), NULL); + qdev_init_nofail(dev); + + d = pci_create_simple(b, 0, TYPE_I440FX_XEN_PCI_DEVICE); + *pi440fx_state = I440FX_XEN_PCI_DEVICE(d); + f = *pi440fx_state; + f->system_memory = address_space_mem; + f->pci_address_space = pci_address_space; + f->ram_memory = ram_memory; + + i440fx = I440FX_PCI_HOST_BRIDGE(dev); + i440fx->pci_info.w32.begin = below_4g_mem_size; + + /* setup pci memory mapping */ + pc_pci_as_mapping_init(OBJECT(f), f->system_memory, + f->pci_address_space); + + memory_region_init_alias(&f->smram_region, OBJECT(d), "smram-region", + f->pci_address_space, 0xa0000, 0x20000); + memory_region_add_subregion_overlap(f->system_memory, 0xa0000, + &f->smram_region, 1); + memory_region_set_enabled(&f->smram_region, false); + init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space, + &f->pam_regions[0], PAM_BIOS_BASE, PAM_BIOS_SIZE); + for (i = 0; i < 12; ++i) { + init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space, + &f->pam_regions[i+1], PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, + PAM_EXPAN_SIZE); + } + + /* Xen supports additional interrupt routes from the PCI devices to + * the IOAPIC: the four pins of each PCI device on the bus are also + * connected to the IOAPIC directly. + * These additional routes can be discovered through ACPI. */ + piix3 = DO_UPCAST(PIIX3State, dev, + pci_create_simple_multifunction(b, -1, true, "PIIX3-xen")); + pci_bus_irqs(b, xen_piix3_set_irq, xen_pci_slot_get_pirq, + piix3, XEN_PIIX_NUM_PIRQS); + piix3->pic = pic; + *isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(piix3), "isa.0")); + + *piix3_devfn = piix3->dev.devfn; + + ram_size = ram_size / 8 / 1024 / 1024; + if (ram_size > 255) { + ram_size = 255; + } + d->config[0x57] = ram_size; + + i440fx_update_memory_mappings(f); + + return b; +} + PCIBus *find_i440fx(void) { PCIHostState *s = OBJECT_CHECK(PCIHostState, diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 1c0c382..51656d9 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -239,6 +239,16 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix_devfn, MemoryRegion *pci_memory, MemoryRegion *ram_memory); +PCIBus *xen_igd_i440fx_init(PCII440FXState **pi440fx_state, int *piix_devfn, + ISABus **isa_bus, qemu_irq *pic, + MemoryRegion *address_space_mem, + MemoryRegion *address_space_io, + ram_addr_t ram_size, + ram_addr_t below_4g_mem_size, + ram_addr_t above_4g_mem_size, + MemoryRegion *pci_memory, + MemoryRegion *ram_memory); + PCIBus *find_i440fx(void); /* piix4.c */ extern PCIDevice *piix4_dev; -- 1.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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