[PATCH v7 20/23] hw/isa/piix: Reuse PIIX3 base class' realize method in PIIX4

[Bernhard Beschow <shentey@gmail.com>]

Resolves duplicate code.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20221022150508.26830-39-shentey@gmail.com>
---
 hw/isa/piix.c | 78 ++++++++++++++++-----------------------------------
 1 file changed, 24 insertions(+), 54 deletions(-)

diff --git a/hw/isa/piix.c b/hw/isa/piix.c
index 4b48fe6023..0177be6d6f 100644
--- a/hw/isa/piix.c
+++ b/hw/isa/piix.c
@@ -332,17 +332,11 @@ static const MemoryRegionOps rcr_ops = {
     },
 };
 
-static void pci_piix3_realize(PCIDevice *dev, Error **errp)
+static void pci_piix_realize(PCIDevice *dev, const char *uhci_type,
+                             ISABus *isa_bus, Error **errp)
 {
     PIIXState *d = PIIX_PCI_DEVICE(dev);
     PCIBus *pci_bus = pci_get_bus(dev);
-    ISABus *isa_bus;
-
-    isa_bus = isa_bus_new(DEVICE(d), pci_address_space(dev),
-                          pci_address_space_io(dev), errp);
-    if (!isa_bus) {
-        return;
-    }
 
     memory_region_init_io(&d->rcr_mem, OBJECT(dev), &rcr_ops, d,
                           "piix-reset-control", 1);
@@ -367,8 +361,7 @@ static void pci_piix3_realize(PCIDevice *dev, Error **errp)
 
     /* USB */
     if (d->has_usb) {
-        object_initialize_child(OBJECT(dev), "uhci", &d->uhci,
-                                TYPE_PIIX3_USB_UHCI);
+        object_initialize_child(OBJECT(dev), "uhci", &d->uhci, uhci_type);
         qdev_prop_set_int32(DEVICE(&d->uhci), "addr", dev->devfn + 2);
         if (!qdev_realize(DEVICE(&d->uhci), BUS(pci_bus), errp)) {
             return;
@@ -467,8 +460,15 @@ static void piix3_realize(PCIDevice *dev, Error **errp)
     ERRP_GUARD();
     PIIXState *piix3 = PIIX_PCI_DEVICE(dev);
     PCIBus *pci_bus = pci_get_bus(dev);
+    ISABus *isa_bus;
+
+    isa_bus = isa_bus_new(DEVICE(dev), pci_address_space(dev),
+                          pci_address_space_io(dev), errp);
+    if (!isa_bus) {
+        return;
+    }
 
-    pci_piix3_realize(dev, errp);
+    pci_piix_realize(dev, TYPE_PIIX3_USB_UHCI, isa_bus, errp);
     if (*errp) {
         return;
     }
@@ -496,8 +496,15 @@ static void piix3_xen_realize(PCIDevice *dev, Error **errp)
     ERRP_GUARD();
     PIIXState *piix3 = PIIX_PCI_DEVICE(dev);
     PCIBus *pci_bus = pci_get_bus(dev);
+    ISABus *isa_bus;
 
-    pci_piix3_realize(dev, errp);
+    isa_bus = isa_bus_new(DEVICE(dev), pci_address_space(dev),
+                          pci_address_space_io(dev), errp);
+    if (!isa_bus) {
+        return;
+    }
+
+    pci_piix_realize(dev, TYPE_PIIX3_USB_UHCI, isa_bus, errp);
     if (*errp) {
         return;
     }
@@ -533,6 +540,7 @@ static void piix4_request_i8259_irq(void *opaque, int irq, int level)
 
 static void piix4_realize(PCIDevice *dev, Error **errp)
 {
+    ERRP_GUARD();
     PIIXState *s = PIIX_PCI_DEVICE(dev);
     PCIBus *pci_bus = pci_get_bus(dev);
     ISABus *isa_bus;
@@ -544,59 +552,21 @@ static void piix4_realize(PCIDevice *dev, Error **errp)
         return;
     }
 
-    memory_region_init_io(&s->rcr_mem, OBJECT(dev), &rcr_ops, s,
-                          "piix-reset-control", 1);
-    memory_region_add_subregion_overlap(pci_address_space_io(dev),
-                                        PIIX_RCR_IOPORT, &s->rcr_mem, 1);
-
     /* initialize i8259 pic */
     i8259_out_irq = qemu_allocate_irqs(piix4_request_i8259_irq, s, 1);
     s->pic = i8259_init(isa_bus, *i8259_out_irq);
 
-    /* initialize ISA irqs */
-    isa_bus_irqs(isa_bus, s->pic);
+    pci_piix_realize(dev, TYPE_PIIX4_USB_UHCI, isa_bus, errp);
+    if (*errp) {
+        return;
+    }
 
     /* initialize pit */
     i8254_pit_init(isa_bus, 0x40, 0, NULL);
 
-    /* DMA */
-    i8257_dma_init(isa_bus, 0);
-
     /* RTC */
-    qdev_prop_set_int32(DEVICE(&s->rtc), "base_year", 2000);
-    if (!qdev_realize(DEVICE(&s->rtc), BUS(isa_bus), errp)) {
-        return;
-    }
     s->rtc.irq = s->pic[s->rtc.isairq];
 
-    /* IDE */
-    qdev_prop_set_int32(DEVICE(&s->ide), "addr", dev->devfn + 1);
-    if (!qdev_realize(DEVICE(&s->ide), BUS(pci_bus), errp)) {
-        return;
-    }
-
-    /* USB */
-    if (s->has_usb) {
-        object_initialize_child(OBJECT(dev), "uhci", &s->uhci,
-                                TYPE_PIIX4_USB_UHCI);
-        qdev_prop_set_int32(DEVICE(&s->uhci), "addr", dev->devfn + 2);
-        if (!qdev_realize(DEVICE(&s->uhci), BUS(pci_bus), errp)) {
-            return;
-        }
-    }
-
-    /* ACPI controller */
-    if (s->has_acpi) {
-        object_initialize_child(OBJECT(s), "pm", &s->pm, TYPE_PIIX4_PM);
-        qdev_prop_set_int32(DEVICE(&s->pm), "addr", dev->devfn + 3);
-        qdev_prop_set_uint32(DEVICE(&s->pm), "smb_io_base", s->smb_io_base);
-        qdev_prop_set_bit(DEVICE(&s->pm), "smm-enabled", s->smm_enabled);
-        if (!qdev_realize(DEVICE(&s->pm), BUS(pci_bus), errp)) {
-            return;
-        }
-        qdev_connect_gpio_out(DEVICE(&s->pm), 0, s->pic[9]);
-    }
-
     pci_bus_irqs(pci_bus, piix4_set_irq, s, PIIX_NUM_PIRQS);
 }
 
-- 
2.39.1