diff options
| author | Benjamin Herrenschmidt | 2007-07-26 14:07:13 +1000 |
|---|---|---|
| committer | Paul Mackerras | 2007-07-26 16:17:47 +1000 |
| commit | 6dfbde209171cd15407e7540d363a434a489aaca (patch) | |
| tree | 0db7a89f32b3b61d3334085b67c276945dd6560f /arch | |
| parent | f5d834fc34e61f1a40435981062000e5d2b2baa8 (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.c | 23 |
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. */ |