summaryrefslogtreecommitdiff
path: root/src/commonlib/region.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/commonlib/region.c')
-rw-r--r--src/commonlib/region.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/src/commonlib/region.c b/src/commonlib/region.c
index 352f92e37f..49626005b9 100644
--- a/src/commonlib/region.c
+++ b/src/commonlib/region.c
@@ -194,3 +194,56 @@ int mmap_helper_rdev_munmap(const struct region_device *rd, void *mapping)
return 0;
}
+
+static void *xlate_mmap(const struct region_device *rd, size_t offset,
+ size_t size)
+{
+ const struct xlate_region_device *xldev;
+ struct region req = {
+ .offset = offset,
+ .size = size,
+ };
+
+ xldev = container_of(rd, typeof(*xldev), rdev);
+
+ if (!is_subregion(&xldev->sub_region, &req))
+ return NULL;
+
+ offset -= region_offset(&xldev->sub_region);
+
+ return rdev_mmap(xldev->access_dev, offset, size);
+}
+
+static int xlate_munmap(const struct region_device *rd, void *mapping)
+{
+ const struct xlate_region_device *xldev;
+
+ xldev = container_of(rd, typeof(*xldev), rdev);
+
+ return rdev_munmap(xldev->access_dev, mapping);
+}
+
+static ssize_t xlate_readat(const struct region_device *rd, void *b,
+ size_t offset, size_t size)
+{
+ struct region req = {
+ .offset = offset,
+ .size = size,
+ };
+ const struct xlate_region_device *xldev;
+
+ xldev = container_of(rd, typeof(*xldev), rdev);
+
+ if (!is_subregion(&xldev->sub_region, &req))
+ return -1;
+
+ offset -= region_offset(&xldev->sub_region);
+
+ return rdev_readat(xldev->access_dev, b, offset, size);
+}
+
+const struct region_device_ops xlate_rdev_ops = {
+ .mmap = xlate_mmap,
+ .munmap = xlate_munmap,
+ .readat = xlate_readat,
+};