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| author | Myron Stowe <mstowe@redhat.com> | 2011-11-07 16:23:34 -0700 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-01-17 04:35:20 -0500 |
| commit | 6f68c91c55ea3576d366797fa8d45e31c4aa79f8 (patch) | |
| tree | c896013c1a5d63a6a20c8cc4b68eee53ce24844a | |
| parent | bc9ffce27962c0c5fdc6adf74790ea0fcbe4a99c (diff) | |
| download | for-greg-6f68c91c55ea3576d366797fa8d45e31c4aa79f8.tar.gz | |
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>
| -rw-r--r-- | drivers/acpi/osl.c | 6 | ||||
| -rw-r--r-- | include/linux/acpi_io.h | 3 |
2 files changed, 7 insertions, 2 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 2e285cdbefb1e6..b11f2676f7c9b0 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 diff --git a/include/linux/acpi_io.h b/include/linux/acpi_io.h index 4afd7102459d7f..b0ffa219993ec2 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 |