diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-07-26 08:07:13 +0400 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-07-26 10:17:47 +0400 |
| commit | 6dfbde209171cd15407e7540d363a434a489aaca (patch) | |
| tree | 0db7a89f32b3b61d3334085b67c276945dd6560f /include | |
| parent | f5d834fc34e61f1a40435981062000e5d2b2baa8 (diff) | |
| download | linux-6dfbde209171cd15407e7540d363a434a489aaca.tar.xz | |
[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 'include')
| -rw-r--r-- | include/asm-powerpc/pci-bridge.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h index d53e0eb1de16..e909769b6410 100644 --- a/include/asm-powerpc/pci-bridge.h +++ b/include/asm-powerpc/pci-bridge.h @@ -71,6 +71,14 @@ static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus) return bus->sysdata; } +static inline int isa_vaddr_is_ioport(void __iomem *address) +{ + /* No specific ISA handling on ppc32 at this stage, it + * all goes through PCI + */ + return 0; +} + /* These are used for config access before all the PCI probing has been done. */ int early_read_config_byte(struct pci_controller *hose, int bus, int dev_fn, @@ -241,6 +249,13 @@ extern void pcibios_free_controller(struct pci_controller *phb); extern void isa_bridge_find_early(struct pci_controller *hose); +static inline int isa_vaddr_is_ioport(void __iomem *address) +{ + /* Check if address hits the reserved legacy IO range */ + unsigned long ea = (unsigned long)address; + return ea >= ISA_IO_BASE && ea < ISA_IO_END; +} + extern int pcibios_unmap_io_space(struct pci_bus *bus); extern int pcibios_map_io_space(struct pci_bus *bus); @@ -271,11 +286,16 @@ extern struct pci_controller * pcibios_alloc_controller(struct device_node *dev); #ifdef CONFIG_PCI extern unsigned long pci_address_to_pio(phys_addr_t address); +extern int pcibios_vaddr_is_ioport(void __iomem *address); #else static inline unsigned long pci_address_to_pio(phys_addr_t address) { return (unsigned long)-1; } +static inline int pcibios_vaddr_is_ioport(void __iomem *address) +{ + return 0; +} #endif |