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>
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2 changed files with 7 additions and 2 deletions
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@ -431,7 +431,7 @@ void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
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__acpi_unmap_table(virt, size);
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}
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static int acpi_os_map_generic_address(struct acpi_generic_address *gas)
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int acpi_os_map_generic_address(struct acpi_generic_address *gas)
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{
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u64 addr;
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void __iomem *virt;
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@ -450,8 +450,9 @@ static int acpi_os_map_generic_address(struct acpi_generic_address *gas)
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return 0;
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}
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EXPORT_SYMBOL(acpi_os_map_generic_address);
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static void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
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void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
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{
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u64 addr;
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struct acpi_ioremap *map;
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@ -475,6 +476,7 @@ static void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
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acpi_os_map_cleanup(map);
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}
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EXPORT_SYMBOL(acpi_os_unmap_generic_address);
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#ifdef ACPI_FUTURE_USAGE
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acpi_status
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@ -12,4 +12,7 @@ static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
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void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size);
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int acpi_os_map_generic_address(struct acpi_generic_address *addr);
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void acpi_os_unmap_generic_address(struct acpi_generic_address *addr);
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#endif
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