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https://github.com/smaeul/u-boot.git
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e456a81935
Add two new configurations (qemu-riscv{32,64}_spl_defconfig) with SPL
enabled for RISC-V QEMU. QEMU does not require SPL to run U-Boot. The
configurations are meant to help the development of SPL on RISC-V.
The configurations enable RAM as the only SPL boot device. Images must
be loaded at address 0x80200000. In the default boot flow, U-Boot SPL
starts in machine mode, loads the OpenSBI FW_DYNAMIC firmware and U-Boot
proper from the supplied FIT image, and starts OpenSBI. U-Boot proper is
then started in supervisor mode by OpenSBI.
Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <env.h>
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#include <fdtdec.h>
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#include <spl.h>
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#include <virtio_types.h>
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#include <virtio.h>
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int board_init(void)
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{
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/*
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* Make sure virtio bus is enumerated so that peripherals
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* on the virtio bus can be discovered by their drivers
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*/
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virtio_init();
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return 0;
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}
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int board_late_init(void)
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{
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ulong kernel_start;
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ofnode chosen_node;
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int ret;
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chosen_node = ofnode_path("/chosen");
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if (!ofnode_valid(chosen_node)) {
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debug("No chosen node found, can't get kernel start address\n");
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return 0;
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}
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#ifdef CONFIG_ARCH_RV64I
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ret = ofnode_read_u64(chosen_node, "riscv,kernel-start",
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(u64 *)&kernel_start);
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#else
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ret = ofnode_read_u32(chosen_node, "riscv,kernel-start",
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(u32 *)&kernel_start);
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#endif
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if (ret) {
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debug("Can't find kernel start address in device tree\n");
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return 0;
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}
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env_set_hex("kernel_start", kernel_start);
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return 0;
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}
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/*
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* QEMU specifies the location of Linux (supplied with the -kernel argument)
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* in the device tree using the riscv,kernel-start and riscv,kernel-end
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* properties. We currently rely on the SBI implementation of BBL to run
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* Linux and therefore embed Linux as payload in BBL. This causes an issue,
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* because BBL detects the kernel properties in the device tree and ignores
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* the Linux payload as a result. To work around this issue, we clear the
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* kernel properties before booting Linux.
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*
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* This workaround can be removed, once we do not require BBL for its SBI
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* implementation anymore.
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*/
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int ft_board_setup(void *blob, bd_t *bd)
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{
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int chosen_offset, ret;
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chosen_offset = fdt_path_offset(blob, "/chosen");
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if (chosen_offset < 0)
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return 0;
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#ifdef CONFIG_ARCH_RV64I
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ret = fdt_setprop_u64(blob, chosen_offset, "riscv,kernel-start", 0);
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#else
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ret = fdt_setprop_u32(blob, chosen_offset, "riscv,kernel-start", 0);
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#endif
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if (ret)
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return ret;
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#ifdef CONFIG_ARCH_RV64I
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ret = fdt_setprop_u64(blob, chosen_offset, "riscv,kernel-end", 0);
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#else
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ret = fdt_setprop_u32(blob, chosen_offset, "riscv,kernel-end", 0);
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#endif
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if (ret)
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return ret;
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return 0;
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}
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#ifdef CONFIG_SPL
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u32 spl_boot_device(void)
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{
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/* RISC-V QEMU only supports RAM as SPL boot device */
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return BOOT_DEVICE_RAM;
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}
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#endif
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#ifdef CONFIG_SPL_LOAD_FIT
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int board_fit_config_name_match(const char *name)
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{
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/* boot using first FIT config */
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return 0;
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}
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#endif
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