[PATCH 0/9] ARM: renesas: Use SMP jump stub SRAM region from DT
Simon Horman
horms at verge.net.au
Mon Jul 10 02:31:32 PDT 2017
On Mon, Jul 10, 2017 at 10:44:47AM +0200, Geert Uytterhoeven wrote:
> Hi Simon,
>
> On Mon, Jul 10, 2017 at 10:39 AM, Simon Horman <horms at verge.net.au> wrote:
> > On Tue, Jul 04, 2017 at 06:44:48PM +0200, Geert Uytterhoeven wrote:
> >> On Tue, Jul 4, 2017 at 5:41 PM, Geert Uytterhoeven
> >> <geert+renesas at glider.be> wrote:
> >> > The R-Car Gen2 platform code for CPU core bringup needs to copy a jump
> >> > stub to on-SoC SRAM. Currently it uses a hardcoded address pointing to
> >> > ICRAM1.
> >> >
> >> > This patch series adds support to specify this region from DT. It
> >> > consists of 3 parts:
> >> > - DT binding documentation for reserving SRAM for the jump stub,
> >> > - A platform code update to retrieve the information from DT, if
> >> > present (of course backwards-compatibility with old DTBs is
> >> > preserved),
> >> > - DT updates to reserve an SRAM region in DT on all R-Car Gen2 and
> >> > RZ/G1 SoCs.
> >> >
> >> > The DT patches in this series depend on "[PATCH 0/7] ARM: dts: renesas:
> >> > Add Inter Connect RAM".
> >> >
> >> > Note that the current jump stub in Linux is 12 bytes long. The patches
> >> > reserve 16 bytes of SRAM. Should this be increased? The mapping
> >> > granularity is PAGE_SIZE anyway.
> >> >
> >> > Thanks for your comments!
> >> >
> >> > Geert Uytterhoeven (9):
> >> > dt-bindings: sram: Document renesas,smp-sram
> >> > ARM: shmobile: rcar-gen2: Obtain jump stub region from DT
> >> > ARM: dts: r8a7743: Reserve SRAM for the SMP jump stub
> >> > ARM: dts: r8a7745: Reserve SRAM for the SMP jump stub
> >> > ARM: dts: r8a7790: Reserve SRAM for the SMP jump stub
> >> > ARM: dts: r8a7791: Reserve SRAM for the SMP jump stub
> >> > ARM: dts: r8a7792: Reserve SRAM for the SMP jump stub
> >> > ARM: dts: r8a7793: Reserve SRAM for the SMP jump stub
> >> > ARM: dts: r8a7794: Reserve SRAM for the SMP jump stub
> >>
> >> Forgot to mention: this has been tested on r8a7790/lager, r8a7791/koelsch,
> >> r8a7792/blanche, r8a7793/gose, and r8a7794/alt (r8a7794 needs an
> >> unrelated fix to enable SMP).
> >
> > Geert, these seem nice and clean to me.
> > Are they ready to be applied?
>
> Now the binding has been Acked by Rob, I think they are.
> Thanks!
Thanks, all patches accepted for v4.14.
More information about the linux-arm-kernel
mailing list