[U-Boot] [PATCH v2 10/14] cmd: bootefi: carve out fdt parameter handling

[AKASHI Takahiro <takahiro.akashi@linaro.org>]

On Sun, Dec 23, 2018 at 04:11:59AM +0100, Alexander Graf wrote:
> 
> 
> On 03.12.18 08:33, AKASHI Takahiro wrote:
> > On Mon, Dec 03, 2018 at 12:50:04AM +0100, Alexander Graf wrote:
> >>
> >>
> >> On 05.11.18 10:06, AKASHI Takahiro wrote:
> >>> The current way how command parameters, particularly "fdt addr," are
> >>> handled makes it a bit complicated to add a subcommand-specific parameter.
> >>> So just refactor the code and extract efi_handle_fdt().
> >>>
> >>> This commit is a preparatory change for enhancing bootmgr sub-command.
> >>>
> >>> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> >>> ---
> >>>  cmd/bootefi.c  | 51 +++++++++++++++++++++++++++++++++-----------------
> >>>  cmd/efishell.h |  1 +
> >>>  2 files changed, 35 insertions(+), 17 deletions(-)
> >>>
> >>> diff --git a/cmd/bootefi.c b/cmd/bootefi.c
> >>> index 5d61819f1f5c..3aedf5a09f93 100644
> >>> --- a/cmd/bootefi.c
> >>> +++ b/cmd/bootefi.c
> >>> @@ -356,6 +356,31 @@ static efi_status_t efi_install_fdt(ulong fdt_addr)
> >>>  	return ret;
> >>>  }
> >>>  
> >>> +int efi_handle_fdt(char *fdt_opt)
> >>> +{
> >>> +	unsigned long fdt_addr;
> >>> +	efi_status_t r;
> >>> +
> >>> +	if (fdt_opt) {
> >>> +		fdt_addr = simple_strtoul(fdt_opt, NULL, 16);
> >>> +		if (!fdt_addr && *fdt_opt != '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");
> >>> +	}
> >>> +
> >>> +	return CMD_RET_SUCCESS;
> >>> +}
> >>> +
> >>>  /**
> >>>   * do_bootefi_exec() - execute EFI binary
> >>>   *
> >>> @@ -511,7 +536,6 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
> >>>  	unsigned long addr;
> >>>  	char *saddr;
> >>>  	efi_status_t r;
> >>> -	unsigned long fdt_addr;
> >>>  
> >>>  	/* Allow unaligned memory access */
> >>>  	allow_unaligned();
> >>> @@ -527,21 +551,6 @@ 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");
> >>> -	}
> >>>  #ifdef CONFIG_CMD_BOOTEFI_HELLO
> >>>  	if (!strcmp(argv[1], "hello")) {
> >>>  		ulong size = __efi_helloworld_end - __efi_helloworld_begin;
> >>> @@ -559,6 +568,9 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
> >>>  		struct efi_loaded_image_obj *image_obj;
> >>>  		struct efi_loaded_image *loaded_image_info;
> >>>  
> >>> +		if (efi_handle_fdt(argc > 2 ? argv[2] : NULL))
> >>> +			return CMD_RET_FAILURE;
> >>> +
> >>>  		/* Construct a dummy device path. */
> >>>  		bootefi_device_path = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE,
> >>>  						      (uintptr_t)&efi_selftest,
> >>> @@ -583,7 +595,10 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
> >>>  	} else
> >>>  #endif
> >>>  	if (!strcmp(argv[1], "bootmgr")) {
> >>> -		return do_bootefi_bootmgr_exec();
> >>> +		if (efi_handle_fdt(argc > 2 ? argv[2] : NULL))
> >>> +			return CMD_RET_FAILURE;
> >>> +
> >>> +		return do_bootefi_bootmgr_exec(boot_id);
> >>>  	} else {
> >>>  		saddr = argv[1];
> >>>  
> >>> @@ -592,6 +607,8 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
> >>>  		if (!addr && *saddr != '0')
> >>>  			return CMD_RET_USAGE;
> >>>  
> >>> +		if (efi_handle_fdt(argc > 2 ? argv[2] : NULL))
> >>> +			return CMD_RET_FAILURE;
> >>>  	}
> >>>  
> >>>  	printf("## Starting EFI application at %08lx ...\n", addr);
> >>> diff --git a/cmd/efishell.h b/cmd/efishell.h
> >>> index 6f70b402b26b..1e5764a8a38d 100644
> >>> --- a/cmd/efishell.h
> >>> +++ b/cmd/efishell.h
> >>> @@ -3,3 +3,4 @@
> >>>  #include <efi.h>
> >>>  
> >>>  efi_status_t efi_init_obj_list(void);
> >>> +int efi_handle_fdt(char *fdt_opt);
> >>
> >> This should also go into efi_loader.h, as that's the subsystem that
> >> exports the function.
> > 
> > I hesitate to agree with you here as this function is provided as part
> > of bootefi in the first place. Run command is just a variant of
> > bootefi for efi binary. So it won't be seen as part of efi_loader function.
> > 
> > # In this sense, efishell.h should be renamed to bootefi.h?
> 
> Feel free to introduce a bootefi.h that contains all exports from
> bootefi.c, yes :).

OK, but due to your comment on a new do_bootefi_run() function,
we may no longer need to export efi_handle_fdt() (at least for now).
That's good.

-Takahiro Akashi

> 
> Alex