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ACPI: Export interfaces for ioremapping/iounmapping ACPI registers

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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>
This commit is contained in:
Myron Stowe 2011-11-07 16:23:34 -07:00 committed by Len Brown
parent bc9ffce279
commit 6f68c91c55
2 changed files with 7 additions and 2 deletions
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6
drivers/acpi/osl.c
View File

@ -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

3
include/linux/acpi_io.h
View File

@ -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