[PATCH] arm: mvebu: Define env_sf_get_env_addr() for all Armada boards in SPL

[Marek Behún]

On Tue, 9 Aug 2022 11:27:09 +0200
Pali Rohár <pali at kernel.org> wrote:

> On Tuesday 09 August 2022 11:20:12 Marek Behún wrote:
> > On Mon,  8 Aug 2022 19:13:43 +0200
> > Pali Rohár <pali at kernel.org> wrote:
> >   
> > > SPI0 CS0 Flash is mapped to address range 0xD4000000 - 0xD7FFFFFF by BootROM.
> > > Proper U-Boot removes this direct mapping. So it is available only in SPL.
> > > This applies for all 32-bit Armada BootROMs. SPL mvebu code is used only on
> > > 32-bit Armada SoCs. So move env_sf_get_env_addr() function from Turris
> > > Omnia board to common SPL mvebu code and add proper checks for SPI0 CS0.
> > > 
> > > Signed-off-by: Pali Rohár <pali at kernel.org>  
> > 
> > Do we know that this will work for all flash memories used on those
> > other boards? Some boards may have non-compliant SPI-NORs soldered on.
> > 
> > But if BootROM on those boards also uses this mapping to read flash, it
> > should be okay...  
> 
> IIRC this range is used by BootROM for reading SPL.
> 
> Ok, I can imagine some very special configuration where SPL kwbimage is
> stored on eMMC, eMMC is used for BootROM booting, but ENV is stored on
> non-standard SPI flash, which BootROM cannot access, but U-Boot yes.
> 
> So maybe I should add another #ifdef guard e.g. ?
> 
>   #ifdef CONFIG_MVEBU_SPL_BOOT_DEVICE_SPI

I don't think such non-standard configurations are used :) Lets do that
only if someone complains.

Marek