On 30.10.18 13:55, Lukas Auer wrote:
> The device tree passed by the prior boot stage can be used to boot
> Linux. Store it as environment variable "prior_stage_dtb", so that it
> can be used as part of the boot command.
>
> Signed-off-by: Lukas Auer <lukas.a...@aisec.fraunhofer.de>
> ---
>
> Changes in v2:
> - New patch
>
> arch/Kconfig | 1 +
> arch/riscv/cpu/cpu.c | 7 +++++++
> arch/riscv/include/asm/u-boot-riscv.h | 1 +
> 3 files changed, 9 insertions(+)
>
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 9fdd2f7e66..883e4a9308 100644
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -74,6 +74,7 @@ config RISCV
> imply MTD
> imply TIMER
> imply CMD_DM
> + imply ARCH_MISC_INIT
>
> config SANDBOX
> bool "Sandbox"
> diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c
> index d9f820c44c..e06a8c6bab 100644
> --- a/arch/riscv/cpu/cpu.c
> +++ b/arch/riscv/cpu/cpu.c
> @@ -53,3 +53,10 @@ int print_cpuinfo(void)
>
> return 0;
> }
> +
> +int arch_misc_init(void)
> +{
> + env_set_hex("prior_stage_dtb", prior_stage_fdt_address);
Please reuse one of the many other variable names we have for this
already, such as "fdtaddr".
One thing I would always recommend is that if you have a prior stage DT
passed on to U-Boot is that U-Boot makes use of that (CONFIG_OF_BOARD).
That again means that the DT is already available in $fdtcontroladdr and
there is very little use for yet another env variable.
Alex
> +
> + return 0;
> +}
> diff --git a/arch/riscv/include/asm/u-boot-riscv.h
> b/arch/riscv/include/asm/u-boot-riscv.h
> index 49febd5881..937b2682dc 100644
> --- a/arch/riscv/include/asm/u-boot-riscv.h
> +++ b/arch/riscv/include/asm/u-boot-riscv.h
> @@ -13,6 +13,7 @@
>
> /* cpu/.../cpu.c */
> int cleanup_before_linux(void);
> +int arch_misc_init(void);
>
> /* board/.../... */
> int board_init(void);
>
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
