Marek Vasut <ma...@denx.de> schrieb am Fr., 3. Mai 2019, 22:42: > On 5/3/19 10:39 PM, Simon Goldschmidt wrote: > > > > > > On 03.05.19 22:35, Marek Vasut wrote: > >> On 5/3/19 10:30 PM, Simon Goldschmidt wrote: > >>> > >>> > >>> On 03.05.19 22:28, Marek Vasut wrote: > >>>> On 5/3/19 10:08 PM, Simon Goldschmidt wrote: > >>>>> This moves the code that enables the Boot ROM to just jump to SRAM > >>>>> instead > >>>>> of loading SPL from the original boot source on warm reboot. > >>>>> > >>>>> Instead of always enabling this, an environment callback for the > >>>>> env var > >>>>> "socfpga_reboot_from_sram" is used. This way, the behaviour can be > >>>>> enabled > >>>>> at runtime and via saved environment. > >>>>> > >>>>> Signed-off-by: Simon Goldschmidt <simon.k.r.goldschm...@gmail.com> > >>>> > >>>> Would that be like a default "reset" command action ? > >>>> This probably shouldn't be socfpga specific then. > >>> > >>> No, it's a thing that lives on and influences even the soft reset > issued > >>> by linux "reboot" command. This is something *very* socfpga specific. > >> > >> Hmmm, so isn't this a policy to be configured on the Linux end ? > > > > Might be, but it affects U-Boot's 'reset' command as well. And I guess > > it's set up in U-Boot this early to ensure it always works. > > Drat, that's right. So there has to be some way to agree on how the > reset works between the kernel and U-Boot ? > > > If it were for me, we could drop writing this magic altogether. I just > > figured some boards might require it to be written somewhere, and came > > up with a patch that might save those boards with the way it was before. > > Isn't this magic actually used by bootrom ? >
Right. It tells the boot rom to jump to ocram on next reboot instead of loading spl from qspi or mmc. But if that's required or not a good idea at all depends on many factors. Some of them board related, some U-Boot related and some Linux related (depending on the hardware and drivers used). Regards, Simon > _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
