[U-Boot] [PATCH v2] [RFC] memsize.c: adapt get_ram_size() for address spaces >32 bit

[Wolfgang Denk]

Dear Scott Wood,

In message <20100527194618.GC5915 at schlenkerla.am.freescale.net> you wrote:
> On Thu, May 27, 2010 at 08:16:28PM +0200, Wolfgang Denk wrote:
> > get_ram_size() used to use "long" data types for addresses and data,
> > which limited it to systems with less than 4 GiB memory. As more and
> > more systems are coming up with bigger memory resources, we adapt the
> > code to use phys_addr_t / phys_size_t data types instead.
> 
> This cannot work as is.  The only systems where this makes a difference are
> where physical addresses are larger than virtual pointers -- but you try to
> shove the 64-bit physical offset into a 32-bit pointer.
> 
> You need to create temporary mappings, if you really want to do this.

?

Isn't phys_addr_t assumed to be the right data type to hold a
physical address?

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"And it should be the law: If you use  the  word  `paradigm'  without
knowing  what  the  dictionary  says  it  means,  you  go to jail. No
exceptions."                     - David Jones @ Megatest Corporation