[PATCH] platform: generic: Add support for UltraRISC DP1000 SoC platform

[Anup Patel]

On Mon, Jun 16, 2025 at 11:27 AM Neo <neopimail at gmail.com> wrote:
>
> This patch adds initial platform support for the UltraRISC DP1000 SoC
> to OpenSBI.
>
> The UltraRISC DP1000 is a multi-core RISC-V 64-bit SoC developed by
> UltraRISC Technology (Shanghai) Co., Ltd.
>
> We intend to upstream DP1000 support to align with OpenSBI's mission
> of supporting diverse RISC-V platforms and to simplify support for
> Linux and U-Boot on UltraRISC hardware.
>
> Signed-off-by: Yi Pei <neopimail at gmail.com>
> ---
> platform/generic/Kconfig | 4 ++++
> platform/generic/configs/defconfig | 1 +
> platform/generic/ultrarisc/dp1000.c | 17 +++++++++++++++++
> platform/generic/ultrarisc/objects.mk | 8 ++++++++
> 4 files changed, 36 insertions(+)
> create mode 100644 platform/generic/ultrarisc/dp1000.c
> create mode 100644 platform/generic/ultrarisc/objects.mk
> diff --git a/platform/generic/Kconfig b/platform/generic/Kconfig
> index 688da3f4..54f1674d 100644
> --- a/platform/generic/Kconfig
> +++ b/platform/generic/Kconfig
> @@ -68,6 +68,10 @@ config PLATFORM_THEAD
> select THEAD_C9XX_PMU
> default n
> +config PLATFORM_ULTRARISC_DP1000
> + bool "UltraRISC DP1000 support"
> + default n
> +
> source "$(OPENSBI_SRC_DIR)/platform/generic/andes/Kconfig"
> source "$(OPENSBI_SRC_DIR)/platform/generic/thead/Kconfig"
> diff --git a/platform/generic/configs/defconfig
> b/platform/generic/configs/defconfig
> index bb260626..717906ef 100644
> --- a/platform/generic/configs/defconfig
> +++ b/platform/generic/configs/defconfig
> @@ -6,6 +6,7 @@ CONFIG_PLATFORM_SIFIVE_FU740=y
> CONFIG_PLATFORM_SOPHGO_SG2042=y
> CONFIG_PLATFORM_STARFIVE_JH7110=y
> CONFIG_PLATFORM_THEAD=y
> +CONFIG_PLATFORM_ULTRARISC_DP1000=y
> CONFIG_FDT_CPPC=y
> CONFIG_FDT_CPPC_RPMI=y
> CONFIG_FDT_GPIO=y
> diff --git a/platform/generic/ultrarisc/dp1000.c
> b/platform/generic/ultrarisc/dp1000.c
> new file mode 100644
> index 00000000..f21b2875
> --- /dev/null
> +++ b/platform/generic/ultrarisc/dp1000.c
> @@ -0,0 +1,17 @@
> +// SPDX-License-Identifier: BSD-2-Clause
> +/*
> + * Copyright (C) 2025 UltraRISC,Inc
> + */
> +
> +#include <platform_override.h>
> +#include <sbi/sbi_platform.h>
> +#include <sbi_utils/fdt/fdt_helper.h>
> +
> +static const struct fdt_match ultrarisc_dp1000_match[] = {
> + {.compatible = "ultrarisc,dp1000"},
> + {},
> +};
> +
> +const struct platform_override ultrarisc_dp1000 = {
> + .match_table = ultrarisc_dp1000_match,
> +};

Adding platform_override to OpenSBI generic platform is
only needed if there is some platform specific initialization
required.  It seems there is no UltraRISC DP1000 specific
initialization so this patch is not needed.

Regards,
Anup

> diff --git a/platform/generic/ultrarisc/objects.mk
> b/platform/generic/ultrarisc/objects.mk
> new file mode 100644
> index 00000000..71e66f35
> --- /dev/null
> +++ b/platform/generic/ultrarisc/objects.mk
> @@ -0,0 +1,8 @@
> +#
> +# SPDX-License-Identifier: BSD-2-Clause
> +#
> +# Copyright (C) 2025 UltraRISC,Inc
> +#
> +
> +carray-platform_override_modules-$(CONFIG_PLATFORM_ULTRARISC_DP1000)
> += ultrarisc_dp1000
> +platform-objs-$(CONFIG_PLATFORM_ULTRARISC_DP1000) += ultrarisc/dp1000.o
> --
> 2.34.1
>
> --
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