diff options
| -rw-r--r-- | sys/alpha/include/bus.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/sys/alpha/include/bus.h b/sys/alpha/include/bus.h index 4c1d55b018c6..11d47ce96739 100644 --- a/sys/alpha/include/bus.h +++ b/sys/alpha/include/bus.h @@ -90,6 +90,26 @@ typedef u_int32_t bus_space_handle_t; #define BUS_SPACE_UNRESTRICTED (~0UL) +/* + * Get a new handle for a subregion of an already-mapped area of bus space. + */ + +static __inline int bus_space_subregion(bus_space_tag_t t, + bus_space_handle_t bsh, + bus_size_t offset, bus_size_t size, + bus_space_handle_t *nbshp); + +static __inline int +bus_space_subregion(bus_space_tag_t t __unused, bus_space_handle_t bsh, + bus_size_t offset, bus_size_t size __unused, + bus_space_handle_t *nbshp) +{ + + *nbshp = bsh + offset; + return (0); +} + + struct alpha_busspace; struct alpha_busspace_ops { |