svn commit: r220559 - in head/sys: conf geom

[Andrew Thompson]

On 12 April 2011 20:10, Adrian Chadd <adrian at freebsd.org> wrote:
> Author: adrian
> Date: Tue Apr 12 08:10:25 2011
> New Revision: 220559
> URL: http://svn.freebsd.org/changeset/base/220559
>
> Log:
>  Introduce geom_map, a GEOM provider designed for use by
>  embedded flash stores.
>
>  Some devices - notably those with uboot - don't have an
>  explicit partition table (eg like Redboot's FIS.)
>  geom_map thus provides an easy way to export the hard-coded
>  flash layout as geom providers for use by filesystems and
>  other tools.
>
>  It also includes a "search" function which allows for
>  dynamic creation of partition layouts where the device only
>  has a single hard-coded partition. For example, if
>  there is a "kernel+rootfs" partition, a single image can
>  be created which appends the rootfs after the kernel with
>  an appropriate search string. geom_map can be told to
>  search for said search string and create a partition
>  beginning after it.
>
>  Submitted by: Aleksandr Rybalko <ray at dlink.ua>
>
> Added:
>  head/sys/geom/geom_map.c   (contents, props changed)
> Modified:
>  head/sys/conf/files
>
> Added: head/sys/geom/geom_map.c
> ==============================================================================
> --- /dev/null   00:00:00 1970   (empty, because file is newly added)
> +++ head/sys/geom/geom_map.c    Tue Apr 12 08:10:25 2011        (r220559)
> @@ -0,0 +1,356 @@
> +
> +#define MAP_CLASS_NAME "MAP"
> +
> +struct map_desc {
> +       uint8_t         name   [16];    /* null-terminated name */
> +       uint32_t        offset; /* offset in flash */
> +       uint32_t        addr;   /* address in memory */
> +       uint32_t        size;   /* image size in bytes */
> +       uint32_t        entry;  /* offset in image for entry point */
> +       uint32_t        dsize;  /* data size in bytes */
> +};

It could at some point be used on larger storage, perhaps get rid of
the 4G limit now?


Andrew