Am Sonntag, 27. November 2022, 12:31:15 CET schrieb Guo Ren: > On Sun, Nov 27, 2022 at 12:36 AM Conor Dooley <conor@xxxxxxxxxx> wrote: > > > > On Fri, Nov 25, 2022 at 05:46:55PM -0600, Samuel Holland wrote: > > > Allwinner manufactures the sunxi family of application processors. This > > > includes the "sun8i" series of ARMv7 SoCs, the "sun50i" series of ARMv8 > > > SoCs, and now the "sun20i" series of 64-bit RISC-V SoCs. > > > > > > The first SoC in the sun20i series is D1, containing a single T-HEAD > > > C906 core. D1s is a low-pin-count variant of D1 with co-packaged DRAM. > > > > > > Most peripherals are shared across the entire chip family. In fact, the > > > ARMv7 T113 SoC is pin-compatible and almost entirely register-compatible > > > with the D1s. > > > > > > This means many existing device drivers can be reused. To facilitate > > > this reuse, name the symbol ARCH_SUNXI, since that is what the existing > > > drivers have as their dependency. > > > > > > Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx> > > > Tested-by: Heiko Stuebner <heiko@xxxxxxxxx> > > > Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx> > > > --- > > > > > > Changes in v2: > > > - Sort Kconfig as if we had done s/SOC_/ARCH_/ for future-proofing > > > > > > arch/riscv/Kconfig.socs | 9 +++++++++ > > > 1 file changed, 9 insertions(+) > > > > > > diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs > > > index 69774bb362d6..4c1dc2ca11f9 100644 > > > --- a/arch/riscv/Kconfig.socs > > > +++ b/arch/riscv/Kconfig.socs > > > @@ -26,6 +26,15 @@ config SOC_STARFIVE > > > help > > > This enables support for StarFive SoC platform hardware. > > > > > > +config ARCH_SUNXI > > > + bool "Allwinner sun20i SoCs" > > > + select ERRATA_THEAD if MMU && !XIP_KERNEL > > depend on MMU > depend on !XIP_KERNEL > select ERRATA_THEAD That sounds like a better variant. The D1 / C906 _needs_ the errata for the memory handling and the other alternative constraints require the !XIP With the select, a xip-kernel would not boot at all on a D1 Heiko
