riscv: cpu: fu540: Add support for cpu fu540
Add SiFive fu540 cpu to support RISC-V arch
Signed-off-by: Pragnesh Patel <pragnesh.patel@sifive.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index fb5fe5a..d9854f5 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -56,6 +56,7 @@
# platform-specific options below
source "arch/riscv/cpu/ax25/Kconfig"
+source "arch/riscv/cpu/fu540/Kconfig"
source "arch/riscv/cpu/generic/Kconfig"
# architecture-specific options below
diff --git a/arch/riscv/cpu/fu540/Kconfig b/arch/riscv/cpu/fu540/Kconfig
new file mode 100644
index 0000000..e9302e8
--- /dev/null
+++ b/arch/riscv/cpu/fu540/Kconfig
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+
+config SIFIVE_FU540
+ bool
+ select ARCH_EARLY_INIT_R
+ imply CPU
+ imply CPU_RISCV
+ imply RISCV_TIMER
+ imply SIFIVE_CLINT if (RISCV_MMODE || SPL_RISCV_MMODE)
+ imply CMD_CPU
+ imply SPL_CPU_SUPPORT
+ imply SPL_OPENSBI
+ imply SPL_LOAD_FIT
diff --git a/arch/riscv/cpu/fu540/Makefile b/arch/riscv/cpu/fu540/Makefile
new file mode 100644
index 0000000..44700d9
--- /dev/null
+++ b/arch/riscv/cpu/fu540/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2020 SiFive, Inc
+# Pragnesh Patel <pragnesh.patel@sifive.com>
+
+obj-y += dram.o
+obj-y += cpu.o
diff --git a/arch/riscv/cpu/fu540/cpu.c b/arch/riscv/cpu/fu540/cpu.c
new file mode 100644
index 0000000..f13c189
--- /dev/null
+++ b/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/arch/riscv/cpu/fu540/dram.c b/arch/riscv/cpu/fu540/dram.c
new file mode 100644
index 0000000..1dc77ef
--- /dev/null
+++ b/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 <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)
+{
+#ifdef CONFIG_64BIT
+ /*
+ * 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;
+#endif
+ return gd->ram_top;
+}
diff --git a/arch/riscv/include/asm/arch-fu540/clk.h b/arch/riscv/include/asm/arch-fu540/clk.h
new file mode 100644
index 0000000..d71ed43
--- /dev/null
+++ b/arch/riscv/include/asm/arch-fu540/clk.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2020 SiFive Inc
+ *
+ * Authors:
+ * Pragnesh Patel <pragnesh.patel@sifive.com>
+ */
+
+#ifndef __CLK_SIFIVE_H
+#define __CLK_SIFIVE_H
+
+/* Note: This is a placeholder header for driver compilation. */
+
+#endif
diff --git a/arch/riscv/include/asm/arch-fu540/gpio.h b/arch/riscv/include/asm/arch-fu540/gpio.h
new file mode 100644
index 0000000..0d16c59
--- /dev/null
+++ b/arch/riscv/include/asm/arch-fu540/gpio.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019 SiFive, Inc.
+ */
+
+#ifndef _GPIO_SIFIVE_H
+#define _GPIO_SIFIVE_H
+
+#define GPIO_INPUT_VAL 0x00
+#define GPIO_INPUT_EN 0x04
+#define GPIO_OUTPUT_EN 0x08
+#define GPIO_OUTPUT_VAL 0x0C
+#define GPIO_RISE_IE 0x18
+#define GPIO_RISE_IP 0x1C
+#define GPIO_FALL_IE 0x20
+#define GPIO_FALL_IP 0x24
+#define GPIO_HIGH_IE 0x28
+#define GPIO_HIGH_IP 0x2C
+#define GPIO_LOW_IE 0x30
+#define GPIO_LOW_IP 0x34
+#define GPIO_OUTPUT_XOR 0x40
+
+#define NR_GPIOS 16
+
+enum gpio_state {
+ LOW,
+ HIGH
+};
+
+/* Details about a GPIO bank */
+struct sifive_gpio_platdata {
+ void *base; /* address of registers in physical memory */
+};
+
+#define SIFIVE_GENERIC_GPIO_NR(port, index) \
+ (((port) * NR_GPIOS) + ((index) & (NR_GPIOS - 1)))
+
+#endif /* _GPIO_SIFIVE_H */
diff --git a/board/sifive/fu540/Kconfig b/board/sifive/fu540/Kconfig
index d41c305..eb5ba31 100644
--- a/board/sifive/fu540/Kconfig
+++ b/board/sifive/fu540/Kconfig
@@ -7,7 +7,7 @@
default "sifive"
config SYS_CPU
- default "generic"
+ default "fu540"
config SYS_CONFIG_NAME
default "sifive-fu540"