[Xen-devel] [PATCH 25/32] hw/pci-host/piix: Extract piix3_create()

[Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>]

Extract the PIIX3 creation code from the i440fx_init() function.

Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
---
 hw/pci-host/piix.c | 51 ++++++++++++++++++++++++++++------------------
 1 file changed, 31 insertions(+), 20 deletions(-)

diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
index 2f4cbcbfe9..3292703de7 100644
--- a/hw/pci-host/piix.c
+++ b/hw/pci-host/piix.c
@@ -331,6 +331,36 @@ static void i440fx_realize(PCIDevice *dev, Error **errp)
     }
 }
 
+static PIIX3State *piix3_create(PCIBus *pci_bus, ISABus **isa_bus)
+{
+    PIIX3State *piix3;
+    PCIDevice *pci_dev;
+
+    /*
+     * 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.
+     */
+    if (xen_enabled()) {
+        pci_dev = pci_create_simple_multifunction(pci_bus, -1, true,
+                                                  TYPE_PIIX3_XEN_DEVICE);
+        piix3 = PIIX3_PCI_DEVICE(pci_dev);
+        pci_bus_irqs(pci_bus, xen_piix3_set_irq, xen_pci_slot_get_pirq,
+                     piix3, XEN_PIIX_NUM_PIRQS);
+    } else {
+        pci_dev = pci_create_simple_multifunction(pci_bus, -1, true,
+                                                  TYPE_PIIX3_DEVICE);
+        piix3 = PIIX3_PCI_DEVICE(pci_dev);
+        pci_bus_irqs(pci_bus, piix3_set_irq, pci_slot_get_pirq,
+                     piix3, PIIX_NUM_PIRQS);
+        pci_bus_set_route_irq_fn(pci_bus, piix3_route_intx_pin_to_irq);
+    }
+    *isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(piix3), "isa.0"));
+
+    return piix3;
+}
+
 PCIBus *i440fx_init(const char *host_type, const char *pci_type,
                     PCII440FXState **pi440fx_state,
                     int *piix3_devfn,
@@ -400,27 +430,8 @@ PCIBus *i440fx_init(const char *host_type, const char 
*pci_type,
                  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. */
-    if (xen_enabled()) {
-        PCIDevice *pci_dev = pci_create_simple_multifunction(b,
-                             -1, true, TYPE_PIIX3_XEN_DEVICE);
-        piix3 = PIIX3_PCI_DEVICE(pci_dev);
-        pci_bus_irqs(b, xen_piix3_set_irq, xen_pci_slot_get_pirq,
-                piix3, XEN_PIIX_NUM_PIRQS);
-    } else {
-        PCIDevice *pci_dev = pci_create_simple_multifunction(b,
-                             -1, true, TYPE_PIIX3_DEVICE);
-        piix3 = PIIX3_PCI_DEVICE(pci_dev);
-        pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3,
-                PIIX_NUM_PIRQS);
-        pci_bus_set_route_irq_fn(b, piix3_route_intx_pin_to_irq);
-    }
+    piix3 = piix3_create(b, isa_bus);
     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;
-- 
2.21.0


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