pci: add accessor function to get irq levels
Introduce accessor function to know INTx levels. It will be used later by q35. Although piix_pci tracks the intx line levels, it can be eliminated by this helper function. Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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7
hw/pci.c
7
hw/pci.c
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@ -126,6 +126,13 @@ static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change)
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bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
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bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
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}
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}
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int pci_bus_get_irq_level(PCIBus *bus, int irq_num)
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{
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assert(irq_num >= 0);
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assert(irq_num < bus->nirq);
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return !!bus->irq_count[irq_num];
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}
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/* Update interrupt status bit in config space on interrupt
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/* Update interrupt status bit in config space on interrupt
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* state change. */
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* state change. */
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static void pci_update_irq_status(PCIDevice *dev)
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static void pci_update_irq_status(PCIDevice *dev)
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1
hw/pci.h
1
hw/pci.h
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@ -234,6 +234,7 @@ void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
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PCIBus *pci_bus_new(DeviceState *parent, const char *name, uint8_t devfn_min);
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PCIBus *pci_bus_new(DeviceState *parent, const char *name, uint8_t devfn_min);
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void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
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void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
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void *irq_opaque, int nirq);
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void *irq_opaque, int nirq);
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int pci_bus_get_irq_level(PCIBus *bus, int irq_num);
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void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *dev);
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void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *dev);
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PCIBus *pci_register_bus(DeviceState *parent, const char *name,
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PCIBus *pci_register_bus(DeviceState *parent, const char *name,
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pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
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pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
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