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>
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 2e285cd..b11f267 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -431,7 +431,7 @@
__acpi_unmap_table(virt, size);
}
-static int acpi_os_map_generic_address(struct acpi_generic_address *gas)
+int acpi_os_map_generic_address(struct acpi_generic_address *gas)
{
u64 addr;
void __iomem *virt;
@@ -450,8 +450,9 @@
return 0;
}
+EXPORT_SYMBOL(acpi_os_map_generic_address);
-static void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
+void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
{
u64 addr;
struct acpi_ioremap *map;
@@ -475,6 +476,7 @@
acpi_os_map_cleanup(map);
}
+EXPORT_SYMBOL(acpi_os_unmap_generic_address);
#ifdef ACPI_FUTURE_USAGE
acpi_status