Hi Magnus, Mark, Rob, Simon, 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 .../devicetree/bindings/sram/renesas,smp-sram.txt | 27 ++++++++++++++++++ arch/arm/boot/dts/r8a7743.dtsi | 8 ++++++ arch/arm/boot/dts/r8a7745.dtsi | 8 ++++++ arch/arm/boot/dts/r8a7790.dtsi | 8 ++++++ arch/arm/boot/dts/r8a7791.dtsi | 8 ++++++ arch/arm/boot/dts/r8a7792.dtsi | 8 ++++++ arch/arm/boot/dts/r8a7793.dtsi | 8 ++++++ arch/arm/boot/dts/r8a7794.dtsi | 8 ++++++ arch/arm/mach-shmobile/pm-rcar-gen2.c | 33 ++++++++++++++++++++-- 9 files changed, 113 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/sram/renesas,smp-sram.txt -- 2.7.4 Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html