diff options
Diffstat (limited to 'src/commonlib/include')
| -rw-r--r-- | src/commonlib/include/commonlib/region.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/commonlib/include/commonlib/region.h b/src/commonlib/include/commonlib/region.h index d3e7ebdfff..fbc1790033 100644 --- a/src/commonlib/include/commonlib/region.h +++ b/src/commonlib/include/commonlib/region.h @@ -154,4 +154,27 @@ void mmap_helper_device_init(struct mmap_helper_region_device *mdev, void *mmap_helper_rdev_mmap(const struct region_device *, size_t, size_t); int mmap_helper_rdev_munmap(const struct region_device *, void *); +/* A translated region device provides the ability to publish a region device + * in one address space and use an access mechansim within another address + * space. The sub region is the window within the 1st address space and + * the request is modified prior to accessing the second address space + * provided by access_dev. */ +struct xlate_region_device { + const struct region_device *access_dev; + struct region sub_region; + struct region_device rdev; +}; + +extern const struct region_device_ops xlate_rdev_ops; + +#define XLATE_REGION_INIT(access_dev_, sub_offset_, sub_size_, parent_sz_) \ + { \ + .access_dev = access_dev_, \ + .sub_region = { \ + .offset = (sub_offset_), \ + .size = (sub_size_), \ + }, \ + .rdev = REGION_DEV_INIT(&xlate_rdev_ops, 0, (parent_sz_)),\ + } + #endif /* _REGION_H_ */ |