[U-Boot] [RFC v2 04/11] cmd: bootefi: carve out fdt handling from do_bootefi()

[Heinrich Schuchardt]

On 3/27/19 5:40 AM, AKASHI Takahiro wrote:
> This is a preparatory patch for reworking do_bootefi() in later patch.
>
> Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
> ---
>  cmd/bootefi.c | 53 ++++++++++++++++++++++++++++++++++++---------------
>  1 file changed, 38 insertions(+), 15 deletions(-)
>
> diff --git a/cmd/bootefi.c b/cmd/bootefi.c
> index 3619a20e6433..aba8b203d419 100644
> --- a/cmd/bootefi.c
> +++ b/cmd/bootefi.c
> @@ -198,6 +198,40 @@ static efi_status_t efi_install_fdt(ulong fdt_addr)
>  	return ret;
>  }
>
> +/**
> + * efi_process_fdt() - process fdt passed by a command argument
> + * @fdt_opt:	pointer to argument
> + * Return:	CMD_RET_SUCCESS on success,
> +		CMD_RET_USAGE or CMD_RET_FAILURE otherwise

This does not match the actual return values.

> + *
> + * If specified, fdt will be installed as configuration table,
> + * otherwise no fdt will be passed.
> + */
> +static efi_status_t efi_process_fdt(const char *fdt_opt)
> +{
> +	unsigned long fdt_addr;
> +	efi_status_t ret;
> +
> +	if (fdt_opt) {
> +		fdt_addr = simple_strtoul(fdt_opt, NULL, 16);
> +		if (!fdt_addr && *fdt_opt != '0')
> +			return EFI_INVALID_PARAMETER;
> +
> +		/* Install device tree */
> +		ret = efi_install_fdt(fdt_addr);
> +		if (ret != EFI_SUCCESS) {
> +			printf("ERROR: failed to install device tree\n");
> +			return ret;
> +		}
> +	} else {
> +		/* Remove device tree. EFI_NOT_FOUND can be ignored here */
> +		efi_install_configuration_table(&efi_guid_fdt, NULL);
> +		printf("WARNING: booting without device tree\n");

As x86 does not require a device tree, please, remove this message.

> +	}
> +
> +	return EFI_SUCCESS;
> +}
> +
>  static efi_status_t bootefi_run_prepare(const char *load_options_path,
>  		struct efi_device_path *device_path,
>  		struct efi_device_path *image_path,
> @@ -407,21 +441,10 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
>  	if (argc < 2)
>  		return CMD_RET_USAGE;
>
> -	if (argc > 2) {
> -		fdt_addr = simple_strtoul(argv[2], NULL, 16);
> -		if (!fdt_addr && *argv[2] != '0')
> -			return CMD_RET_USAGE;
> -		/* Install device tree */
> -		r = efi_install_fdt(fdt_addr);
> -		if (r != EFI_SUCCESS) {
> -			printf("ERROR: failed to install device tree\n");
> -			return CMD_RET_FAILURE;
> -		}
> -	} else {
> -		/* Remove device tree. EFI_NOT_FOUND can be ignored here */
> -		efi_install_configuration_table(&efi_guid_fdt, NULL);
> -		printf("WARNING: booting without device tree\n");
> -	}
> +	r = fdt_process_fdt(argc > 2 ? argv[2] : NULL);
> +	if (r != EFI_SUCCESS)
> +		return r;

Now you return EFI_INVALID_PARAMETER instead of CMD_RET_USAGE.

Best regards

Heinrich

> +
>  #ifdef CONFIG_CMD_BOOTEFI_HELLO
>  	if (!strcmp(argv[1], "hello")) {
>  		ulong size = __efi_helloworld_end - __efi_helloworld_begin;
>