Add a support for SPL which will boot from L2 LIM (0x0800_0000) and then SPL will boot U-Boot FIT image (OpenSBI FW_DYNAMIC + u-boot.bin) from MMC boot devices.
SPL related code is leveraged from FSBL (https://github.com/sifive/freedom-u540-c000-bootloader.git)
Signed-off-by: Pragnesh Patel pragnesh.patel@sifive.com --- arch/riscv/cpu/fu540/Makefile | 4 ++ arch/riscv/cpu/fu540/spl.c | 23 ++++++ .../dts/hifive-unleashed-a00-u-boot.dtsi | 1 + arch/riscv/include/asm/arch-fu540/spl.h | 14 ++++ board/sifive/fu540/Kconfig | 10 ++- board/sifive/fu540/Makefile | 4 ++ board/sifive/fu540/fu540.c | 24 +++++++ board/sifive/fu540/spl.c | 72 +++++++++++++++++++ include/configs/sifive-fu540.h | 18 +++++ 9 files changed, 169 insertions(+), 1 deletion(-) create mode 100644 arch/riscv/cpu/fu540/spl.c create mode 100644 arch/riscv/include/asm/arch-fu540/spl.h create mode 100644 board/sifive/fu540/spl.c
diff --git a/arch/riscv/cpu/fu540/Makefile b/arch/riscv/cpu/fu540/Makefile index 44700d998c..043fb961a5 100644 --- a/arch/riscv/cpu/fu540/Makefile +++ b/arch/riscv/cpu/fu540/Makefile @@ -3,5 +3,9 @@ # 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 +endif diff --git a/arch/riscv/cpu/fu540/spl.c b/arch/riscv/cpu/fu540/spl.c new file mode 100644 index 0000000000..2e05d8a6e2 --- /dev/null +++ b/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 <common.h> +#include <dm.h> + +int soc_spl_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/dts/hifive-unleashed-a00-u-boot.dtsi b/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi index d55ca43411..37de015de6 100644 --- a/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi +++ b/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi @@ -4,6 +4,7 @@ */
#include "fu540-c000-u-boot.dtsi" +#include "fu540-hifive-unleashed-a00-sdram-ddr4.dtsi"
/ { aliases { diff --git a/arch/riscv/include/asm/arch-fu540/spl.h b/arch/riscv/include/asm/arch-fu540/spl.h new file mode 100644 index 0000000000..0c188be747 --- /dev/null +++ b/arch/riscv/include/asm/arch-fu540/spl.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2020 SiFive, Inc. + * + * Authors: + * Pragnesh Patel pragnesh.patel@sifve.com + */ + +#ifndef _SPL_SIFIVE_H +#define _SPL_SIFIVE_H + +int soc_spl_init(void); + +#endif /* _SPL_SIFIVE_H */ diff --git a/board/sifive/fu540/Kconfig b/board/sifive/fu540/Kconfig index d41c305227..f547b11f9a 100644 --- a/board/sifive/fu540/Kconfig +++ b/board/sifive/fu540/Kconfig @@ -7,18 +7,26 @@ config SYS_VENDOR default "sifive"
config SYS_CPU - default "generic" + default "fu540"
config SYS_CONFIG_NAME default "sifive-fu540"
config SYS_TEXT_BASE + default 0x80200000 if SPL default 0x80000000 if !RISCV_SMODE default 0x80200000 if RISCV_SMODE
+config SPL_TEXT_BASE + default 0x08000000 + +config SPL_OPENSBI_LOAD_ADDR + default 0x80000000 + config BOARD_SPECIFIC_OPTIONS # dummy def_bool y select GENERIC_RISCV + select SUPPORT_SPL select RAM select SPL_RAM if SPL imply CMD_DHCP diff --git a/board/sifive/fu540/Makefile b/board/sifive/fu540/Makefile index 6e1862c475..b05e2f5807 100644 --- a/board/sifive/fu540/Makefile +++ b/board/sifive/fu540/Makefile @@ -3,3 +3,7 @@ # Copyright (c) 2019 Western Digital Corporation or its affiliates.
obj-y += fu540.o + +ifdef CONFIG_SPL_BUILD +obj-y += spl.o +endif diff --git a/board/sifive/fu540/fu540.c b/board/sifive/fu540/fu540.c index 540638c919..d05529a86b 100644 --- a/board/sifive/fu540/fu540.c +++ b/board/sifive/fu540/fu540.c @@ -11,6 +11,7 @@ #include <linux/delay.h> #include <linux/io.h> #include <misc.h> +#include <spl.h>
/* * This define is a value used for error/unknown serial. @@ -114,3 +115,26 @@ int board_init(void)
return 0; } + +#ifdef CONFIG_SPL +void board_boot_order(u32 *spl_boot_list) +{ + u8 i; + u32 boot_devices[] = { +#ifdef CONFIG_SPL_MMC_SUPPORT + BOOT_DEVICE_MMC1, +#endif + }; + + for (i = 0; i < ARRAY_SIZE(boot_devices); i++) + spl_boot_list[i] = boot_devices[i]; +} +#endif + +#ifdef CONFIG_SPL_LOAD_FIT +int board_fit_config_name_match(const char *name) +{ + /* boot using first FIT config */ + return 0; +} +#endif diff --git a/board/sifive/fu540/spl.c b/board/sifive/fu540/spl.c new file mode 100644 index 0000000000..b3ff6850e3 --- /dev/null +++ b/board/sifive/fu540/spl.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2019 SiFive, Inc + * + * Authors: + * Pragnesh Patel pragnesh.patel@sifive.com + */ + +#include <common.h> +#include <spl.h> +#include <misc.h> +#include <asm/gpio.h> +#include <asm/arch/gpio.h> +#include <asm/arch/spl.h> + +#define GEM_PHY_RESET SIFIVE_GENERIC_GPIO_NR(0, 12) + +int init_clk_and_ddr(void) +{ + int ret; + + ret = soc_spl_init(); + if (ret) { + debug("FU540 SPL init failed: %d\n", ret); + return ret; + } + + /* + * GEMGXL init VSC8541 PHY reset sequence; + * leave pull-down active for 2ms + */ + udelay(2000); + ret = gpio_request(GEM_PHY_RESET, "gem_phy_reset"); + if (ret) { + debug("gem_phy_reset gpio request failed: %d\n", ret); + return ret; + } + + /* Set GPIO 12 (PHY NRESET) */ + ret = gpio_direction_output(GEM_PHY_RESET, 1); + if (ret) { + debug("gem_phy_reset gpio direction set failed: %d\n", ret); + return ret; + } + + udelay(1); + + /* Reset PHY again to enter unmanaged mode */ + gpio_set_value(GEM_PHY_RESET, 0); + udelay(1); + gpio_set_value(GEM_PHY_RESET, 1); + mdelay(15); + + return 0; +} + +void board_init_f(ulong dummy) +{ + int ret; + + ret = spl_early_init(); + if (ret) + panic("spl_early_init() failed: %d\n", ret); + + arch_cpu_init_dm(); + + preloader_console_init(); + + ret = init_clk_and_ddr(); + if (ret) + panic("init_clk_and_ddr() failed: %d\n", ret); +} diff --git a/include/configs/sifive-fu540.h b/include/configs/sifive-fu540.h index 2756ed5a77..ef3ae9b650 100644 --- a/include/configs/sifive-fu540.h +++ b/include/configs/sifive-fu540.h @@ -11,6 +11,22 @@
#include <linux/sizes.h>
+#ifdef CONFIG_SPL + +#define CONFIG_SPL_MAX_SIZE 0x00100000 +#define CONFIG_SPL_BSS_START_ADDR 0x85000000 +#define CONFIG_SPL_BSS_MAX_SIZE 0x00100000 +#define CONFIG_SYS_SPL_MALLOC_START (CONFIG_SPL_BSS_START_ADDR + \ + CONFIG_SPL_BSS_MAX_SIZE) +#define CONFIG_SYS_SPL_MALLOC_SIZE 0x00100000 + +#define CONFIG_SPL_LOAD_FIT_ADDRESS 0x84000000 + +#define CONFIG_SPL_STACK (0x08000000 + 0x001D0000 - \ + GENERATED_GBL_DATA_SIZE) + +#endif + #define CONFIG_SYS_SDRAM_BASE 0x80000000 #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + SZ_2M)
@@ -24,6 +40,7 @@
/* Environment options */
+#ifndef CONFIG_SPL_BUILD #define BOOT_TARGET_DEVICES(func) \ func(MMC, mmc, 0) \ func(DHCP, dhcp, na) @@ -43,5 +60,6 @@ #define CONFIG_PREBOOT \ "setenv fdt_addr ${fdtcontroladdr};" \ "fdt addr ${fdtcontroladdr};" +#endif
#endif /* __CONFIG_H */