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authorBenjamin Herrenschmidt2007-07-26 14:07:13 +1000
committerPaul Mackerras2007-07-26 16:17:47 +1000
commit6dfbde209171cd15407e7540d363a434a489aaca (patch)
tree0db7a89f32b3b61d3334085b67c276945dd6560f /arch
parentf5d834fc34e61f1a40435981062000e5d2b2baa8 (diff)
[POWERPC] Add function to check if address is an IO port
This adds a function that tells you if a given kernel virtual address is hitting a PCI or ISA IO port permanent mapping or not. This is to be used in the next patch to fix iomap APIs to properly unmap things. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/kernel/pci-common.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index fe7d1255e11e..74a8fd450f67 100644
--- 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.
*/