We'd like to provide a pointer to the device tree blob through the atags mechanism, so add a tag type containing a physical dtb pointer.
We won't need a parser for this, as we'll need to do the devtree parsing a little earlier than other tags. Signed-off-by: Jeremy Kerr <[email protected]> --- arch/arm/include/asm/setup.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h index 3fa2555..99ba6db 100644 --- a/arch/arm/include/asm/setup.h +++ b/arch/arm/include/asm/setup.h @@ -141,6 +141,13 @@ struct tag_memclk { __u32 fmemclk; }; +/* OF device tree blob pointer */ +#define ATAG_DEVTREE 0x5441000a + +struct tag_devtree { + __u32 devtree; /* physical address */ +}; + struct tag { struct tag_header hdr; union { @@ -153,6 +160,7 @@ struct tag { struct tag_revision revision; struct tag_videolfb videolfb; struct tag_cmdline cmdline; + struct tag_devtree devtree; /* * Acorn specific _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
