Re: [Xen-devel] [MULTIBOOT2 DOC PATCH v3 01/13] multiboot2: Replace u_phys with u32

[Andrei Borzenkov <arvidjaar@xxxxxxxxx>]

07.12.2016 01:52, Daniel Kiper пишет:
> u_phys is used just in two places and sometimes it may confuse reader.
> Additionally, GRUB multiboot2 implementation does not use u_phys anywhere.
> So, replace it with basic well defined and used in implementation u32 type.
> 
> Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
> ---
>  doc/multiboot.texi |   11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/doc/multiboot.texi b/doc/multiboot.texi
> index 4b92918..2bda9b7 100644
> --- a/doc/multiboot.texi
> +++ b/doc/multiboot.texi
> @@ -299,9 +299,6 @@ little-endian, u32 is coded in little-endian.
>  The type of unsigned 64-bit data. Because the target architecture is
>  little-endian, u64 is coded in little-endian.
>  
> -@item u_phys
> -The type of unsigned data of the same size as target architecture physical 
> address size.
> -
>  @item u_virt
>  The type of unsigned data of the same size as target architecture virtual 
> address size.
>  

So if I understand it correctly, any address used in multiboot2 is
limited to 32 bit, so anything that is relevant to boot protocol must
reside below 4G. Is my assumption correct?



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