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

[Neo]

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,
+};
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