[U-Boot] [PATCH v3 2/5] arm bootm: Do not append zero ATAG_MEM

Pali Rohár
2012-10-14T00:35:31Z

On Sunday 14 October 2012 02:27:05 Marek Vasut wrote:
> Dear Pali Roh?r,
>
> > On Sunday 14 October 2012 02:17:01 Marek Vasut wrote:
> > > Dear Pali Roh?r,
> > >
> > > > On Sunday 14 October 2012 01:45:06 Marek Vasut wrote:
> > > > > > for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
> > > > > >
> > > > > > + if (bd->bi_dram[i].size == 0)
> > > > > > + continue;
> > > > >
> > > > > This doesn't look right at all, your board is
> > > > > misconfigured
> > > > > if
> > > > > bd->bi_dram[i] == 0. Did you misconfigure
> > > > > CONFIG_NR_DRAM_BANKS
> > > > > ?
> > > >
> > > > On some N900 devices there are two banks and on some only
> > > > one. If there is only one it has size 256 MB and if there
> > > > are two both has 128 MB. CONFIG_NR_DRAM_BANKS must be
> > > > specified at compile time, but for N900 I need runtime
> > > > detection.
> > >
> > > How can that be? Are these two banks contiguous?
> >
> > Yes.
>
> And how does the memory map differ in case of device with one
> 256MB block then ?
>

Memory map is same, from 0x80000000 to 0x90000000.

For two bank devices uboot reports:
size=08000000 start=80000000
size=08000000 start=88000000

And for one:
size=10000000 start=80000000
size=00000000 start=90000000

--
Pali Roh?r
pali.rohar at gmail.com
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