summaryrefslogtreecommitdiffstats
path: root/drivers/acpi
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/osl.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index bd72129e35f..fc6c5d21c3e 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -372,6 +372,44 @@ void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
__acpi_unmap_table(virt, size);
}
+int acpi_os_map_generic_address(struct acpi_generic_address *addr)
+{
+ void __iomem *virt;
+
+ if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
+ return 0;
+
+ if (!addr->address || !addr->bit_width)
+ return -EINVAL;
+
+ virt = acpi_os_map_memory(addr->address, addr->bit_width / 8);
+ if (!virt)
+ return -EIO;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_os_map_generic_address);
+
+void acpi_os_unmap_generic_address(struct acpi_generic_address *addr)
+{
+ void __iomem *virt;
+ unsigned long flags;
+ acpi_size size = addr->bit_width / 8;
+
+ if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
+ return;
+
+ if (!addr->address || !addr->bit_width)
+ return;
+
+ spin_lock_irqsave(&acpi_ioremap_lock, flags);
+ virt = acpi_map_vaddr_lookup(addr->address, size);
+ spin_unlock_irqrestore(&acpi_ioremap_lock, flags);
+
+ acpi_os_unmap_memory(virt, size);
+}
+EXPORT_SYMBOL_GPL(acpi_os_unmap_generic_address);
+
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)