diff options
| author | Lukas Auer | 2018-11-22 11:26:36 +0100 |
|---|---|---|
| committer | Andes | 2018-11-26 13:57:33 +0800 |
| commit | 66ffe5783b6340977ead5782cce9b63edfc0e348 (patch) | |
| tree | 7ed1c06db8b5a625b6d041ba75d39e7a764483e3 /board | |
| parent | afb301295363391f588f37696c27795cd7c0ffc4 (diff) | |
riscv: qemu: detect and boot the kernel passed by QEMU
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>
Diffstat (limited to 'board')
| -rw-r--r-- | board/emulation/qemu-riscv/Kconfig | 1 | ||||
| -rw-r--r-- | board/emulation/qemu-riscv/qemu-riscv.c | 29 |
2 files changed, 30 insertions, 0 deletions
diff --git a/board/emulation/qemu-riscv/Kconfig b/board/emulation/qemu-riscv/Kconfig index 37a80db6a94..be5839b7dba 100644 --- a/board/emulation/qemu-riscv/Kconfig +++ b/board/emulation/qemu-riscv/Kconfig @@ -29,5 +29,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy imply CMD_EXT2 imply CMD_EXT4 imply CMD_FAT + imply BOARD_LATE_INIT endif diff --git a/board/emulation/qemu-riscv/qemu-riscv.c b/board/emulation/qemu-riscv/qemu-riscv.c index 2ce093e19a9..587f2c49094 100644 --- a/board/emulation/qemu-riscv/qemu-riscv.c +++ b/board/emulation/qemu-riscv/qemu-riscv.c @@ -19,3 +19,32 @@ int board_init(void) return 0; } + +int board_late_init(void) +{ + ulong kernel_start; + ofnode chosen_node; + int ret; + + chosen_node = ofnode_path("/chosen"); + if (!ofnode_valid(chosen_node)) { + debug("No chosen node found, can't get kernel start address\n"); + return 0; + } + +#ifdef CONFIG_ARCH_RV64I + ret = ofnode_read_u64(chosen_node, "riscv,kernel-start", + (u64 *)&kernel_start); +#else + ret = ofnode_read_u32(chosen_node, "riscv,kernel-start", + (u32 *)&kernel_start); +#endif + if (ret) { + debug("Can't find kernel start address in device tree\n"); + return 0; + } + + env_set_hex("kernel_start", kernel_start); + + return 0; +} |