66ffe5783b
QEMU embeds the location of the kernel image in the device tree. Store this address in the environment as variable kernel_start. It is used in the board-local distro boot command QEMU to boot the kernel with the U-Boot device tree. The QEMU boot command is added as the first boot target device. Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Alexander Graf <agraf@suse.de>
50 lines
983 B
C
50 lines
983 B
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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