mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-11 13:46:17 +09:00
897206c5cc
QEMU specifies the location of Linux (supplied with the -kernel argument) in the device tree using the riscv,kernel-start and riscv,kernel-end properties. We currently rely on the SBI implementation of BBL to run Linux and therefore embed Linux as payload in BBL. This causes an issue, because BBL detects the kernel properties in the device tree and ignores the Linux payload as a result. Work around this issue by clearing the kernel properties in the device tree before booting Linux. Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
90 lines
2.1 KiB
C
90 lines
2.1 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 <fdtdec.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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