From 7c45fc9870ad7cb3f4516e39454c3e75ab0c4cfb Mon Sep 17 00:00:00 2001 From: Pragnesh Patel Date: Fri, 29 May 2020 11:33:34 +0530 Subject: [PATCH] riscv: cpu: fu540: Add support for cpu fu540 Add SiFive fu540 cpu to support RISC-V arch Signed-off-by: Pragnesh Patel Reviewed-by: Bin Meng Tested-by: Bin Meng Reviewed-by: Jagan Teki Tested-by: Jagan Teki --- arch/riscv/Kconfig | 1 + arch/riscv/cpu/fu540/Kconfig | 15 ++++++++++ arch/riscv/cpu/fu540/Makefile | 7 +++++ arch/riscv/cpu/fu540/cpu.c | 22 ++++++++++++++ arch/riscv/cpu/fu540/dram.c | 38 ++++++++++++++++++++++++ arch/riscv/include/asm/arch-fu540/clk.h | 14 +++++++++ arch/riscv/include/asm/arch-fu540/gpio.h | 38 ++++++++++++++++++++++++ board/sifive/fu540/Kconfig | 2 +- 8 files changed, 136 insertions(+), 1 deletion(-) create mode 100644 arch/riscv/cpu/fu540/Kconfig create mode 100644 arch/riscv/cpu/fu540/Makefile create mode 100644 arch/riscv/cpu/fu540/cpu.c create mode 100644 arch/riscv/cpu/fu540/dram.c create mode 100644 arch/riscv/include/asm/arch-fu540/clk.h create mode 100644 arch/riscv/include/asm/arch-fu540/gpio.h diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index fb5fe5afff..d9854f5283 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -56,6 +56,7 @@ source "board/sifive/fu540/Kconfig" # 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 0000000000..e9302e87c0 --- /dev/null +++ b/arch/riscv/cpu/fu540/Kconfig @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2018, Bin Meng + +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 0000000000..44700d998c --- /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 + +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 0000000000..f13c18942f --- /dev/null +++ b/arch/riscv/cpu/fu540/cpu.c @@ -0,0 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018, Bin Meng + */ + +#include +#include + +/* + * 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 0000000000..1dc77efeca --- /dev/null +++ b/arch/riscv/cpu/fu540/dram.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018, Bin Meng + */ + +#include +#include +#include +#include + +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 0000000000..d71ed4357c --- /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 + */ + +#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 0000000000..0d16c59ca6 --- /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 d41c305227..eb5ba3123d 100644 --- a/board/sifive/fu540/Kconfig +++ b/board/sifive/fu540/Kconfig @@ -7,7 +7,7 @@ config SYS_VENDOR default "sifive" config SYS_CPU - default "generic" + default "fu540" config SYS_CONFIG_NAME default "sifive-fu540" -- 2.25.1