Hi Marek, On Sat, 30 May 2026 at 18:06, Marek Vasut <[email protected]> wrote: > > On 5/30/26 4:45 PM, Marek Vasut wrote: > > Some architectures can not DMA above 4 GiB boundary, > > limit available memory to memory below 4 GiB boundary. > > > > Signed-off-by: Marek Vasut <[email protected]> > > --- > > Cc: Andrew Goodbody <[email protected]> > > Cc: David Lechner <[email protected]> > > Cc: Heiko Schocher <[email protected]> > > Cc: Heinrich Schuchardt <[email protected]> > > Cc: Holger Brunck <[email protected]> > > Cc: Ilias Apalodimas <[email protected]> > > Cc: Peter Robinson <[email protected]> > > Cc: Quentin Schulz <[email protected]> > > Cc: Simon Glass <[email protected]> > > Cc: Sughosh Ganu <[email protected]> > > Cc: Tom Rini <[email protected]> > > Cc: [email protected] > > --- > > lib/Kconfig | 8 ++++++++ > > lib/lmb.c | 20 +++++++++++++++++++- > > 2 files changed, 27 insertions(+), 1 deletion(-) > > > > diff --git a/lib/Kconfig b/lib/Kconfig > > index 77ebc79e1db..29911068a69 100644 > > --- a/lib/Kconfig > > +++ b/lib/Kconfig > > @@ -1295,6 +1295,14 @@ config SPL_LMB_ARCH_MEM_MAP > > memory map. Enable this config in such scenarios which allow > > architectures and boards to define their own memory map. > > > > +config LMB_LIMIT_DMA_BELOW_4G
This seems the right idea for now, but is it really 4G or ram_top? > > + bool > > + depends on LMB > > + default y if ARCH_BCM283X > > + help > > + Some architectures can not DMA above 4 GiB boundary, > > + limit available memory to memory below 4 GiB boundary. > > + > > config PHANDLE_CHECK_SEQ > > bool "Enable phandle check while getting sequence number" > > help [...] Cheers /Ilias
