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authorMyron Stowe <mstowe@redhat.com>2011-11-07 16:23:34 -0700
committerLen Brown <len.brown@intel.com>2012-01-17 04:35:20 -0500
commit6f68c91c55ea3576d366797fa8d45e31c4aa79f8 (patch)
treec896013c1a5d63a6a20c8cc4b68eee53ce24844a /drivers/acpi/osl.c
parentbc9ffce27962c0c5fdc6adf74790ea0fcbe4a99c (diff)
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 'drivers/acpi/osl.c')
-rw-r--r--drivers/acpi/osl.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 2e285cdbefb1..b11f2676f7c9 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -431,7 +431,7 @@ void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
__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 @@ static int acpi_os_map_generic_address(struct acpi_generic_address *gas)
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 @@ static void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
acpi_os_map_cleanup(map);
}
+EXPORT_SYMBOL(acpi_os_unmap_generic_address);
#ifdef ACPI_FUTURE_USAGE
acpi_status