[Qemu-devel] [PATCH 04/15] sun4u: remove pci_ebus_init() function

[Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>]

This is initialisation that should really take place in the ebus realize
function. As part of this we also rework the ebus IRQ mapping so that
instead of having to pass in the array of pbm_irqs, we obtain a reference
to them by looking up the APB device during ebus realize.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/apb.c         |    4 +---
 hw/sparc64/sun4u.c        |   29 ++++++++++++++---------------
 include/hw/pci-host/apb.h |    3 +--
 3 files changed, 16 insertions(+), 20 deletions(-)

diff --git a/hw/pci-host/apb.c b/hw/pci-host/apb.c
index f743a4e..b0f80f6 100644
--- a/hw/pci-host/apb.c
+++ b/hw/pci-host/apb.c
@@ -614,8 +614,7 @@ static void apb_pci_bridge_realize(PCIDevice *dev, Error **errp)
 
 PCIBus *pci_apb_init(hwaddr special_base,
                      hwaddr mem_base,
-                     qemu_irq *ivec_irqs, PCIBus **busA, PCIBus **busB,
-                     qemu_irq **pbm_irqs)
+                     qemu_irq *ivec_irqs, PCIBus **busA, PCIBus **busB)
 {
     DeviceState *dev;
     SysBusDevice *s;
@@ -646,7 +645,6 @@ PCIBus *pci_apb_init(hwaddr special_base,
     memory_region_init(&d->pci_mmio, OBJECT(s), "pci-mmio", 0x100000000ULL);
     memory_region_add_subregion(get_system_memory(), mem_base, &d->pci_mmio);
 
-    *pbm_irqs = d->pbm_irqs;
     d->ivec_irqs = ivec_irqs;
 
     pci_create_simple(phb->bus, 0, "pbm-pci");
diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index 63b4aaa..f3203ea 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -230,21 +230,11 @@ static void isa_irq_handler(void *opaque, int n, int level)
 }
 
 /* EBUS (Eight bit bus) bridge */
-static ISABus *
-pci_ebus_init(PCIDevice *pci_dev, qemu_irq *irqs)
-{
-    qemu_irq *isa_irq;
-    ISABus *isa_bus;
-
-    isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(pci_dev), "isa.0"));
-    isa_irq = qemu_allocate_irqs(isa_irq_handler, irqs, 16);
-    isa_bus_irqs(isa_bus, isa_irq);
-    return isa_bus;
-}
-
 static void ebus_realize(PCIDevice *pci_dev, Error **errp)
 {
     EbusState *s = EBUS(pci_dev);
+    APBState *apb;
+    qemu_irq *isa_irq;
 
     s->isa_bus = isa_bus_new(DEVICE(pci_dev), get_system_memory(),
                              pci_address_space_io(pci_dev), errp);
@@ -253,6 +243,15 @@ static void ebus_realize(PCIDevice *pci_dev, Error **errp)
         return;
     }
 
+    apb = APB_DEVICE(object_resolve_path_type("", TYPE_APB, NULL));
+    if (!apb) {
+        error_setg(errp, "unable to locate APB PCI host bridge");
+        return;
+    }
+
+    isa_irq = qemu_allocate_irqs(isa_irq_handler, apb->pbm_irqs, 16);
+    isa_bus_irqs(s->isa_bus, isa_irq);
+
     pci_dev->config[0x04] = 0x06; // command = bus master, pci mem
     pci_dev->config[0x05] = 0x00;
     pci_dev->config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error
@@ -443,7 +442,7 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
     PCIDevice *ebus, *pci_dev;
     ISABus *isa_bus;
     SysBusDevice *s;
-    qemu_irq *ivec_irqs, *pbm_irqs;
+    qemu_irq *ivec_irqs;
     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
     DriveInfo *fd[MAX_FD];
     DeviceState *dev;
@@ -462,7 +461,7 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
 
     ivec_irqs = qemu_allocate_irqs(sparc64_cpu_set_ivec_irq, cpu, IVEC_MAX);
     pci_bus = pci_apb_init(APB_SPECIAL_BASE, APB_MEM_BASE, ivec_irqs, &pci_busA,
-                           &pci_busB, &pbm_irqs);
+                           &pci_busB);
 
     /* Only in-built Simba PBMs can exist on the root bus, slot 0 on busA is
        reserved (leaving no slots free after on-board devices) however slots
@@ -474,7 +473,7 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
     ebus = pci_create_multifunction(pci_busA, PCI_DEVFN(1, 0), true, TYPE_EBUS);
     qdev_init_nofail(DEVICE(ebus));
 
-    isa_bus = pci_ebus_init(ebus, pbm_irqs);
+    isa_bus = EBUS(ebus)->isa_bus;
 
     i = 0;
     if (hwdef->console_serial_base) {
diff --git a/include/hw/pci-host/apb.h b/include/hw/pci-host/apb.h
index 5d39c03..35d7d5a 100644
--- a/include/hw/pci-host/apb.h
+++ b/include/hw/pci-host/apb.h
@@ -91,6 +91,5 @@ typedef struct PBMPCIBridge {
 
 PCIBus *pci_apb_init(hwaddr special_base,
                      hwaddr mem_base,
-                     qemu_irq *ivec_irqs, PCIBus **bus2, PCIBus **bus3,
-                     qemu_irq **pbm_irqs);
+                     qemu_irq *ivec_irqs, PCIBus **bus2, PCIBus **bus3);
 #endif
-- 
1.7.10.4