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-rw-r--r--include/hw/southbridge/piix.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/hw/southbridge/piix.h b/include/hw/southbridge/piix.h
index add352456b..e49d4a6bbe 100644
--- a/include/hw/southbridge/piix.h
+++ b/include/hw/southbridge/piix.h
@@ -18,6 +18,12 @@ I2CBus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
qemu_irq sci_irq, qemu_irq smi_irq,
int smm_enabled, DeviceState **piix4_pm);
+/*
+ * Reset Control Register: PCI-accessible ISA-Compatible Register at address
+ * 0xcf9, provided by the PCI/ISA bridge (PIIX3 PCI function 0, 8086:7000).
+ */
+#define PIIX_RCR_IOPORT 0xcf9
+
extern PCIDevice *piix4_dev;
DeviceState *piix4_create(PCIBus *pci_bus, ISABus **isa_bus,