[POWERPC] Add function to check if address is an IO port

[platform/kernel/linux-starfive.git] / arch / powerpc / kernel / pci-common.c

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index fe7d125..74a8fd4 100644 (file)
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -101,6 +101,29 @@ void pcibios_free_controller(struct pci_controller *phb)
                kfree(phb);
 }
 
+int pcibios_vaddr_is_ioport(void __iomem *address)
+{
+       int ret = 0;
+       struct pci_controller *hose;
+       unsigned long size;
+
+       spin_lock(&hose_spinlock);
+       list_for_each_entry(hose, &hose_list, list_node) {
+#ifdef CONFIG_PPC64
+               size = hose->pci_io_size;
+#else
+               size = hose->io_resource.end - hose->io_resource.start + 1;
+#endif
+               if (address >= hose->io_base_virt &&
+                   address < (hose->io_base_virt + size)) {
+                       ret = 1;
+                       break;
+               }
+       }
+       spin_unlock(&hose_spinlock);
+       return ret;
+}
+
 /*
  * Return the domain number for this bus.
  */