6 files changed, 202 insertions, 0 deletions
diff --git a/roms/u-boot/arch/riscv/cpu/fu540/Kconfig b/roms/u-boot/arch/riscv/cpu/fu540/Kconfig
new file mode 100644
index 000000000..05463b262
--- /dev/null
+++ b/roms/u-boot/arch/riscv/cpu/fu540/Kconfig
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+
+config SIFIVE_FU540
+	bool
+	select ARCH_EARLY_INIT_R
+	select SUPPORT_SPL
+	select RAM
+	select SPL_RAM if SPL
+	imply CPU
+	imply CPU_RISCV
+	imply RISCV_TIMER if (RISCV_SMODE || SPL_RISCV_SMODE)
+	imply SPL_SIFIVE_CLINT
+	imply CMD_CPU
+	imply SPL_CPU
+	imply SPL_OPENSBI
+	imply SPL_LOAD_FIT
+	imply SMP
+	imply CLK_SIFIVE
+	imply CLK_SIFIVE_PRCI
+	imply SIFIVE_SERIAL
+	imply MACB
+	imply MII
+	imply SPI
+	imply SPI_SIFIVE
+	imply MMC
+	imply MMC_SPI
+	imply MMC_BROKEN_CD
+	imply CMD_MMC
+	imply DM_GPIO
+	imply SIFIVE_GPIO
+	imply CMD_GPIO
+	imply MISC
+	imply SIFIVE_OTP
+	imply DM_PWM
+	imply PWM_SIFIVE
+	imply DM_I2C
+	imply SYS_I2C_OCORES
+
+if ENV_IS_IN_SPI_FLASH
+
+config ENV_OFFSET
+	default 0x505000
+
+config ENV_SIZE
+	default 0x20000
+
+config ENV_SECT_SIZE
+	default 0x10000
+
+endif # ENV_IS_IN_SPI_FLASH
diff --git a/roms/u-boot/arch/riscv/cpu/fu540/Makefile b/roms/u-boot/arch/riscv/cpu/fu540/Makefile
new file mode 100644
index 000000000..088205ef5
--- /dev/null
+++ b/roms/u-boot/arch/riscv/cpu/fu540/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2020 SiFive, Inc
+# Pragnesh Patel <pragnesh.patel@sifive.com>
+
+ifeq ($(CONFIG_SPL_BUILD),y)
+obj-y += spl.o
+else
+obj-y += dram.o
+obj-y += cpu.o
+obj-y += cache.o
+endif
diff --git a/roms/u-boot/arch/riscv/cpu/fu540/cache.c b/roms/u-boot/arch/riscv/cpu/fu540/cache.c
new file mode 100644
index 000000000..0fc4ef6c0
--- /dev/null
+++ b/roms/u-boot/arch/riscv/cpu/fu540/cache.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 SiFive, Inc
+ *
+ * Authors:
+ *   Pragnesh Patel <pragnesh.patel@sifive.com>
+ */
+
+#include <common.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <linux/bitops.h>
+
+/* Register offsets */
+#define L2_CACHE_CONFIG	0x000
+#define L2_CACHE_ENABLE	0x008
+
+#define MASK_NUM_WAYS	GENMASK(15, 8)
+#define NUM_WAYS_SHIFT	8
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int cache_enable_ways(void)
+{
+	const void *blob = gd->fdt_blob;
+	int node;
+	fdt_addr_t base;
+	u32 config;
+	u32 ways;
+
+	volatile u32 *enable;
+
+	node = fdt_node_offset_by_compatible(blob, -1,
+					     "sifive,fu540-c000-ccache");
+
+	if (node < 0)
+		return node;
+
+	base = fdtdec_get_addr_size_auto_parent(blob, 0, node, "reg", 0,
+						NULL, false);
+	if (base == FDT_ADDR_T_NONE)
+		return FDT_ADDR_T_NONE;
+
+	config = readl((volatile u32 *)base + L2_CACHE_CONFIG);
+	ways = (config & MASK_NUM_WAYS) >> NUM_WAYS_SHIFT;
+
+	enable = (volatile u32 *)(base + L2_CACHE_ENABLE);
+
+	/* memory barrier */
+	mb();
+	(*enable) = ways - 1;
+	/* memory barrier */
+	mb();
+	return 0;
+}
diff --git a/roms/u-boot/arch/riscv/cpu/fu540/cpu.c b/roms/u-boot/arch/riscv/cpu/fu540/cpu.c
new file mode 100644
index 000000000..f13c18942
--- /dev/null
+++ b/roms/u-boot/arch/riscv/cpu/fu540/cpu.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <irq_func.h>
+#include <asm/cache.h>
+
+/*
+ * cleanup_before_linux() is called just before we call linux
+ * it prepares the processor for linux
+ *
+ * we disable interrupt and caches.
+ */
+int cleanup_before_linux(void)
+{
+	disable_interrupts();
+
+	cache_flush();
+
+	return 0;
+}
diff --git a/roms/u-boot/arch/riscv/cpu/fu540/dram.c b/roms/u-boot/arch/riscv/cpu/fu540/dram.c
new file mode 100644
index 000000000..1fdc7837b
--- /dev/null
+++ b/roms/u-boot/arch/riscv/cpu/fu540/dram.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <init.h>
+#include <asm/global_data.h>
+#include <linux/sizes.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+	return fdtdec_setup_mem_size_base();
+}
+
+int dram_init_banksize(void)
+{
+	return fdtdec_setup_memory_banksize();
+}
+
+ulong board_get_usable_ram_top(ulong total_size)
+{
+	/*
+	 * Ensure that we run from first 4GB so that all
+	 * addresses used by U-Boot are 32bit addresses.
+	 *
+	 * This in-turn ensures that 32bit DMA capable
+	 * devices work fine because DMA mapping APIs will
+	 * provide 32bit DMA addresses only.
+	 */
+	if (gd->ram_top >= SZ_4G)
+		return SZ_4G - 1;
+
+	return gd->ram_top;
+}
diff --git a/roms/u-boot/arch/riscv/cpu/fu540/spl.c b/roms/u-boot/arch/riscv/cpu/fu540/spl.c
new file mode 100644
index 000000000..45657b790
--- /dev/null
+++ b/roms/u-boot/arch/riscv/cpu/fu540/spl.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 SiFive, Inc
+ * Pragnesh Patel <pragnesh.patel@sifive.com>
+ */
+
+#include <dm.h>
+#include <log.h>
+
+int spl_soc_init(void)
+{
+	int ret;
+	struct udevice *dev;
+
+	/* DDR init */
+	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
+	if (ret) {
+		debug("DRAM init failed: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}