From mboxrd@z Thu Jan 1 00:00:00 1970 From: Myron Stowe Subject: [PATCH -v2 2/4] ACPI: Export interfaces for ioremapping/iounmapping ACPI registers Date: Mon, 07 Nov 2011 16:23:34 -0700 Message-ID: <20111107232334.13472.6680.stgit@amt.stowe> References: <20111107232321.13472.52069.stgit@amt.stowe> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20111107232321.13472.52069.stgit@amt.stowe> Sender: linux-kernel-owner@vger.kernel.org To: lenb@kernel.org Cc: linux-acpi@vger.kernel.org, rjw@sisk.pl, ying.huang@intel.com, bhelgaas@google.com, trenn@suse.de, linux-kernel@vger.kernel.org List-Id: linux-acpi@vger.kernel.org From: Myron Stowe 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 Acked-by: Rafael J. Wysocki --- drivers/acpi/osl.c | 6 ++++-- 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 2e285cd..b11f267 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 4afd710..b0ffa21 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