On Wed, Nov 28, 2018 at 05:24:45AM +0100, Heiko Schocher wrote:
Hello Marek, Jagan,
Am 27.11.2018 um 13:10 schrieb Marek Vasut:
On 11/27/2018 06:51 AM, Jagan Teki wrote:
On Mon, Nov 26, 2018 at 12:48 PM Peng Fan peng.fan@nxp.com wrote:
Hi Jagan,
Just have a quick question here.
After dropping non-DM code, for SPL use non-DM code should switch to SPL_DM and use SPL OF CONTROL?
Here are the options, that we dealt based on the size constraints
- try to use DM_SPL with SPL OF_CONTROL
Not possible
- try PLATDATA
Adds extra bloat to SPLs which are already borderline, so not possible.
- try TPL for truly small size
How would that help ? I don't need extra level of bootloader, I can use SPL right now.
Exactly my thoughts too. I have a at91 based board (smartweb) in mainline where the SPL fits into 4k sram ... no chance for 1) or 2) ...
I see the reasons for integrating more and more stuff into SPL, but it should be possible to build a small SPL ...
Hopefully TPL stays really small ...
Staying small is the stated goal of TPL. And it's not impossible that something like smartweb will need to switch to something like TPL->U-Boot.
Hmm.. while writting (did not actually looked into TPL ...):
Is it possible to boot U-boot directly from TPL ?
No reason why not, so long as everything U-Boot needs is setup, just like always.
if none works, we can see the other option. may be some glue code to read flash for SPL or something else.
I'll have to take a look at the Renesas Gen2, but probably next year.
I talk with customers to get time for converting, but this also may take some time ...
I understand this concern, but, things have been converting for years. I continue to be happy to hear and welcome additional technical problems that need to be solved, but by that same token, I want to be clear that "I think we just can't convert $X to DM for full U-Boot" or similar aren't arguments I'm very receptive to.