PPC: e500: pci: Export slot2irq calculation

We need the calculation method to get from a PCI slot ID to its respective
interrupt line twice. Once in the internal map function and once when
assembling the device tree.

So let's extract the calculation to a separate function that can be called
by both users.

Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/hw/ppce500_pci.h b/hw/ppce500_pci.h
new file mode 100644
index 0000000000..61f773ef30
--- /dev/null
+++ b/hw/ppce500_pci.h
@@ -0,0 +1,9 @@
+#ifndef PPCE500_PCI_H
+#define PPCE500_PCI_H
+
+static inline int ppce500_pci_map_irq_slot(int devno, int irq_num)
+{
+    return (devno + irq_num) % 4;
+}
+
+#endif