[U-Boot] ARM: vexpress: Extend default boot sequence to load script from MMC

[Tom Rini]

On Wed, Nov 30, 2011 at 1:32 AM, Jon Medhurst (Tixy)
<jon.medhurst at linaro.org> wrote:
> On Tue, 2011-11-29 at 13:46 -0700, Tom Rini wrote:
>> On Tue, Nov 29, 2011 at 6:46 AM, Jon Medhurst (Tixy)
>> <jon.medhurst at linaro.org> wrote:
>> > Extend the default boot sequence on Versatile Express to load a boot
>> > script from MMC.
>> >
>> > Signed-off-by: Jon Medhurst <jon.medhurst at linaro.org>
>>
>> Is there any interest in defining a common 'fancy' boot command?  Over
>> on beagleboard (and a few other eval boards) we are (or will be)
>> doing, roughly:
>> Is there mmc? {
>>   Can we load a bootscript? {
>>     load it, do it
>>   }
>>   Can we load uEnv.txt? {
>>     Did it set 'uenvcmd'? {
>>       Run it
>>     }
>>   }
>>   Did we load the kernel? {
>>     bootm it
>>   }
>> }
>> Try nand.
>>
>> And it's not hard to replace NAND with "whatever flash the board sets"
>
> It could make sense. However, the combinations of boot methods could get
> quite big, e.g. do we include pxeboot, tftp?

Well, maybe we define some blocks (TRY_MMC, TRY_ENET, TRY_NAND,
TRY_SPI, ...) ...

> If everything was included in the common 'fancy boot' then some boards
> would have to define boot methods (or stubs) for things they weren't
> interested in. And, conversely, if fancy boot didn't include everything,
> then other people would need to extend it.

... provide a few examples of the blocks strung together and have
people string up what they need themselves, so long as it's an
otherwise good idea to have complex default boot methods?

-- 
Tom