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authorMyron Stowe <mstowe@redhat.com>2011-11-07 23:23:34 (GMT)
committerLen Brown <len.brown@intel.com>2012-01-17 09:35:20 (GMT)
commit6f68c91c55ea3576d366797fa8d45e31c4aa79f8 (patch)
treec896013c1a5d63a6a20c8cc4b68eee53ce24844a /include
parentbc9ffce27962c0c5fdc6adf74790ea0fcbe4a99c (diff)
downloadlinux-6f68c91c55ea3576d366797fa8d45e31c4aa79f8.tar.xz
ACPI: Export interfaces for ioremapping/iounmapping ACPI registers
Export remapping and unmapping interfaces - acpi_os_map_generic_address() and acpi_os_unmap_generic_address() - for ACPI generic registers that are backed by memory mapped I/O (MMIO). The acpi_os_map_generic_address() and acpi_os_unmap_generic_address() declarations may more properly belong in include/acpi/acpiosxf.h next to acpi_os_read_memory() but I believe that would require the ACPI CA making them an official part of the ACPI CA - OS interface. ACPI Generic Address Structure (GAS) reference (ACPI's fixed/generic hardware registers use the GAS format): ACPI Specification, Revision 4.0, Section 5.2.3.1, "Generic Address Structure" Signed-off-by: Myron Stowe <myron.stowe@redhat.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/acpi_io.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/acpi_io.h b/include/linux/acpi_io.h
index 4afd710..b0ffa21 100644
--- a/include/linux/acpi_io.h
+++ b/include/linux/acpi_io.h
@@ -12,4 +12,7 @@ static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size);
+int acpi_os_map_generic_address(struct acpi_generic_address *addr);
+void acpi_os_unmap_generic_address(struct acpi_generic_address *addr);
+
#endif