ACPI: Export interfaces for ioremapping/iounmapping ACPI registers (6f68c91c) · Commits · 戴 / test

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>

drivers/acpi/osl.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -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

include/linux/acpi_io.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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

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