[PATCH 5/5] platform: generic: Add SiFive development platform

[Nick Hu]

From: Vincent Chen <vincent.chen at sifive.com>

The sifive_dev_platform is a new platform which is compatible to the
generic platform to place some features which are only for the SiFive
development machine.

Signed-off-by: Vincent Chen <vincent.chen at sifive.com>
Co-developed-by: Nick Hu <nick.hu at sifive.com>
Signed-off-by: Nick Hu <nick.hu at sifive.com>
---
 platform/generic/Kconfig                      |  5 +++
 platform/generic/configs/defconfig            |  1 +
 platform/generic/sifive/objects.mk            |  3 ++
 platform/generic/sifive/sifive_dev_platform.c | 31 +++++++++++++++++++
 4 files changed, 40 insertions(+)
 create mode 100644 platform/generic/sifive/sifive_dev_platform.c

diff --git a/platform/generic/Kconfig b/platform/generic/Kconfig
index 688da3f4..e27cb50e 100644
--- a/platform/generic/Kconfig
+++ b/platform/generic/Kconfig
@@ -43,6 +43,11 @@ config PLATFORM_RENESAS_RZFIVE
 	select ANDES_PMU
 	default n
 
+config PLATFORM_SIFIVE_DEV
+	bool "SiFive development platform support"
+	depends on FDT_CACHE
+	default n
+
 config PLATFORM_SIFIVE_FU540
 	bool "SiFive FU540 support"
 	default n
diff --git a/platform/generic/configs/defconfig b/platform/generic/configs/defconfig
index 09807207..39869c08 100644
--- a/platform/generic/configs/defconfig
+++ b/platform/generic/configs/defconfig
@@ -1,6 +1,7 @@
 CONFIG_PLATFORM_ALLWINNER_D1=y
 CONFIG_PLATFORM_ANDES_AE350=y
 CONFIG_PLATFORM_RENESAS_RZFIVE=y
+CONFIG_PLATFORM_SIFIVE_DEV=y
 CONFIG_PLATFORM_SIFIVE_FU540=y
 CONFIG_PLATFORM_SIFIVE_FU740=y
 CONFIG_PLATFORM_SOPHGO_SG2042=y
diff --git a/platform/generic/sifive/objects.mk b/platform/generic/sifive/objects.mk
index d75e444a..d32e1273 100644
--- a/platform/generic/sifive/objects.mk
+++ b/platform/generic/sifive/objects.mk
@@ -2,6 +2,9 @@
 # SPDX-License-Identifier: BSD-2-Clause
 #
 
+carray-platform_override_modules-$(CONFIG_PLATFORM_SIFIVE_DEV) += sifive_dev_platform
+platform-objs-$(CONFIG_PLATFORM_SIFIVE_DEV) += sifive/sifive_dev_platform.o
+
 carray-platform_override_modules-$(CONFIG_PLATFORM_SIFIVE_FU540) += sifive_fu540
 platform-objs-$(CONFIG_PLATFORM_SIFIVE_FU540) += sifive/fu540.o
 
diff --git a/platform/generic/sifive/sifive_dev_platform.c b/platform/generic/sifive/sifive_dev_platform.c
new file mode 100644
index 00000000..2506c932
--- /dev/null
+++ b/platform/generic/sifive/sifive_dev_platform.c
@@ -0,0 +1,31 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2025 SiFive Inc.
+ */
+
+#include <platform_override.h>
+#include <sbi_utils/cache/fdt_cmo_helper.h>
+#include <sbi_utils/fdt/fdt_helper.h>
+
+static int sifive_early_init(bool cold_boot, const void *fdt,
+			     const struct fdt_match *match)
+{
+	int rc;
+
+	rc = fdt_cmo_init(fdt, cold_boot);
+	if (rc)
+		return rc;
+
+	return 0;
+}
+
+static const struct fdt_match sifive_dev_platform_match[] = {
+	{ .compatible = "sifive-dev" },
+	{ },
+};
+
+const struct platform_override sifive_dev_platform = {
+	.match_table = sifive_dev_platform_match,
+	.early_init = sifive_early_init,
+};
-- 
2.17.1