Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-28 07:31:15 +00:00
Code Issues Projects Releases Packages Wiki Activity

riscv: qemu: detect and boot the kernel passed by QEMU

Browse source 
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>
This commit is contained in:
Lukas Auer 2018-11-22 11:26:36 +01:00 committed by Andes
parent afb3012953
commit 66ffe5783b
3 changed files with 40 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
board/emulation/qemu-riscv/Kconfig
View file

@ -29,5 +29,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
imply CMD_EXT2
imply CMD_EXT4
imply CMD_FAT
imply BOARD_LATE_INIT
endif

29
board/emulation/qemu-riscv/qemu-riscv.c
View file

@ -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;
}

10
include/configs/qemu-riscv.h
View file

@ -21,11 +21,21 @@
#define CONFIG_ENV_SIZE SZ_4K
#define BOOT_TARGET_DEVICES(func) \
func(QEMU, qemu, na) \
func(VIRTIO, virtio, 0) \
func(DHCP, dhcp, na)
#include <config_distro_bootcmd.h>
#define BOOTENV_DEV_QEMU(devtypeu, devtypel, instance) \
"bootcmd_qemu=" \
"if env exists kernel_start; then " \
"bootm ${kernel_start} - ${fdtcontroladdr};" \
"fi;\0"
#define BOOTENV_DEV_NAME_QEMU(devtypeu, devtypel, instance) \
"qemu "
#define CONFIG_EXTRA_ENV_SETTINGS \
"fdt_high=0xffffffffffffffff\0" \
"initrd_high=0xffffffffffffffff\0" \