Add SiFive fu740 cpu to support RISC-V arch
Signed-off-by: Green Wan green.wan@sifive.com Reviewed-by: Bin Meng bmeng.cn@gmail.com --- arch/riscv/Kconfig | 1 + arch/riscv/cpu/fu740/Kconfig | 37 +++++++++++++++++++++ arch/riscv/cpu/fu740/Makefile | 12 +++++++ arch/riscv/cpu/fu740/cache.c | 55 +++++++++++++++++++++++++++++++ arch/riscv/cpu/fu740/cpu.c | 22 +++++++++++++ arch/riscv/cpu/fu740/dram.c | 38 +++++++++++++++++++++ arch/riscv/cpu/fu740/spl.c | 23 +++++++++++++ arch/riscv/include/asm/arch-fu740/cache.h | 14 ++++++++ arch/riscv/include/asm/arch-fu740/clk.h | 14 ++++++++ arch/riscv/include/asm/arch-fu740/gpio.h | 38 +++++++++++++++++++++ arch/riscv/include/asm/arch-fu740/reset.h | 13 ++++++++ arch/riscv/include/asm/arch-fu740/spl.h | 14 ++++++++ arch/riscv/lib/sifive_clint.c | 1 - 13 files changed, 281 insertions(+), 1 deletion(-) create mode 100644 arch/riscv/cpu/fu740/Kconfig create mode 100644 arch/riscv/cpu/fu740/Makefile create mode 100644 arch/riscv/cpu/fu740/cache.c create mode 100644 arch/riscv/cpu/fu740/cpu.c create mode 100644 arch/riscv/cpu/fu740/dram.c create mode 100644 arch/riscv/cpu/fu740/spl.c create mode 100644 arch/riscv/include/asm/arch-fu740/cache.h create mode 100644 arch/riscv/include/asm/arch-fu740/clk.h create mode 100644 arch/riscv/include/asm/arch-fu740/gpio.h create mode 100644 arch/riscv/include/asm/arch-fu740/reset.h create mode 100644 arch/riscv/include/asm/arch-fu740/spl.h
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index e8494c2..323c358 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -61,6 +61,7 @@ source "board/sipeed/maix/Kconfig" # platform-specific options below source "arch/riscv/cpu/ax25/Kconfig" source "arch/riscv/cpu/fu540/Kconfig" +source "arch/riscv/cpu/fu740/Kconfig" source "arch/riscv/cpu/generic/Kconfig"
# architecture-specific options below diff --git a/arch/riscv/cpu/fu740/Kconfig b/arch/riscv/cpu/fu740/Kconfig new file mode 100644 index 0000000..689e54d --- /dev/null +++ b/arch/riscv/cpu/fu740/Kconfig @@ -0,0 +1,37 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2020-2021 SiFive, Inc +# Pragnesh Patel pragnesh.patel@sifive.com + +config SIFIVE_FU740 + bool + select ARCH_EARLY_INIT_R + select RAM + select SPL_RAM if SPL + imply CPU + imply CPU_RISCV + imply RISCV_TIMER if (RISCV_SMODE || SPL_RISCV_SMODE) + imply SIFIVE_CLINT if (RISCV_MMODE || SPL_RISCV_MMODE) + imply CMD_CPU + imply SPL_CPU_SUPPORT + 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 diff --git a/arch/riscv/cpu/fu740/Makefile b/arch/riscv/cpu/fu740/Makefile new file mode 100644 index 0000000..5ef8ac1 --- /dev/null +++ b/arch/riscv/cpu/fu740/Makefile @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2020-2021 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/arch/riscv/cpu/fu740/cache.c b/arch/riscv/cpu/fu740/cache.c new file mode 100644 index 0000000..680955c --- /dev/null +++ b/arch/riscv/cpu/fu740/cache.c @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2020-2021 SiFive, Inc + * + * Authors: + * Pragnesh Patel pragnesh.patel@sifive.com + */ + +#include <common.h> +#include <asm/io.h> +#include <linux/bitops.h> +#include <asm/global_data.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,fu740-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/arch/riscv/cpu/fu740/cpu.c b/arch/riscv/cpu/fu740/cpu.c new file mode 100644 index 0000000..f13c189 --- /dev/null +++ b/arch/riscv/cpu/fu740/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/fu740/dram.c b/arch/riscv/cpu/fu740/dram.c new file mode 100644 index 0000000..1dc77ef --- /dev/null +++ b/arch/riscv/cpu/fu740/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/cpu/fu740/spl.c b/arch/riscv/cpu/fu740/spl.c new file mode 100644 index 0000000..ea0b228 --- /dev/null +++ b/arch/riscv/cpu/fu740/spl.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2020-201 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; +} diff --git a/arch/riscv/include/asm/arch-fu740/cache.h b/arch/riscv/include/asm/arch-fu740/cache.h new file mode 100644 index 0000000..7d4fe99 --- /dev/null +++ b/arch/riscv/include/asm/arch-fu740/cache.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2020-2021 SiFive, Inc. + * + * Authors: + * Pragnesh Patel pragnesh.patel@sifve.com + */ + +#ifndef _CACHE_SIFIVE_H +#define _CACHE_SIFIVE_H + +int cache_enable_ways(void); + +#endif /* _CACHE_SIFIVE_H */ diff --git a/arch/riscv/include/asm/arch-fu740/clk.h b/arch/riscv/include/asm/arch-fu740/clk.h new file mode 100644 index 0000000..9f88361 --- /dev/null +++ b/arch/riscv/include/asm/arch-fu740/clk.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2020-2021 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-fu740/gpio.h b/arch/riscv/include/asm/arch-fu740/gpio.h new file mode 100644 index 0000000..908e2e5 --- /dev/null +++ b/arch/riscv/include/asm/arch-fu740/gpio.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2020-2021 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_plat { + 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/arch/riscv/include/asm/arch-fu740/reset.h b/arch/riscv/include/asm/arch-fu740/reset.h new file mode 100644 index 0000000..538ef87 --- /dev/null +++ b/arch/riscv/include/asm/arch-fu740/reset.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2020-2021 SiFive, Inc. + * + * Author: Sagar Kadam sagar.kadam@sifive.com + */ + +#ifndef __RESET_SIFIVE_H +#define __RESET_SIFIVE_H + +int sifive_reset_bind(struct udevice *dev, ulong count); + +#endif diff --git a/arch/riscv/include/asm/arch-fu740/spl.h b/arch/riscv/include/asm/arch-fu740/spl.h new file mode 100644 index 0000000..15ad9e7 --- /dev/null +++ b/arch/riscv/include/asm/arch-fu740/spl.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2020-2021 SiFive, Inc. + * + * Authors: + * Pragnesh Patel pragnesh.patel@sifve.com + */ + +#ifndef _SPL_SIFIVE_H +#define _SPL_SIFIVE_H + +int spl_soc_init(void); + +#endif /* _SPL_SIFIVE_H */ diff --git a/arch/riscv/lib/sifive_clint.c b/arch/riscv/lib/sifive_clint.c index ab22395..cfa288a 100644 --- a/arch/riscv/lib/sifive_clint.c +++ b/arch/riscv/lib/sifive_clint.c @@ -10,7 +10,6 @@
#include <common.h> #include <dm.h> -#include <asm/global_data.h> #include <asm/io.h> #include <asm/smp.h> #include <linux/err.h>