[U-Boot] [PATCH v4] imls: Add support to list images in NAND device

[Scott Wood <scottwood@freescale.com>]

On 12/17/2012 02:32:48 AM, Vipin Kumar wrote:
> This patch adds support to list images in NAND flash through imls
> 
> Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
> ---
> Changes in v4
> - Keep stdout dumps in one line
> - Continue even after read errors for all the blocks
> 
>  README             |   3 +-
>  common/cmd_bootm.c | 167  
> ++++++++++++++++++++++++++++++++++++++++++++++++++++-
>  2 files changed, 166 insertions(+), 4 deletions(-)
> 
> diff --git a/README b/README
> index 2077c3b..46fd21d 100644
> --- a/README
> +++ b/README
> @@ -831,7 +831,8 @@ The following options need to be configured:
>  		CONFIG_CMD_I2C		* I2C serial bus support
>  		CONFIG_CMD_IDE		* IDE harddisk support
>  		CONFIG_CMD_IMI		  iminfo
> -		CONFIG_CMD_IMLS		  List all found images
> +		CONFIG_CMD_IMLS		  List all images found in NOR  
> flash
> +		CONFIG_CMD_IMLS_NAND	  List all images found in NAND  
> flash
>  		CONFIG_CMD_IMMAP	* IMMR dump support
>  		CONFIG_CMD_IMPORTENV	* import an environment
>  		CONFIG_CMD_INI		* import data from an ini file  
> into the env
> diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
> index d256ddf..938e500 100644
> --- a/common/cmd_bootm.c
> +++ b/common/cmd_bootm.c
> @@ -80,9 +80,15 @@ static int image_info(unsigned long addr);
>  #include <flash.h>
>  #include <mtd/cfi_flash.h>
>  extern flash_info_t flash_info[]; /* info for FLASH chips */
> +#endif
> +
> +#if defined(CONFIG_CMD_IMLS) || defined(CONFIG_CMD_IMLS_NAND)
>  static int do_imls(cmd_tbl_t *cmdtp, int flag, int argc, char *  
> const argv[]);
>  #endif
> 
> +#include <linux/err.h>
> +#include <nand.h>
> +
>  #ifdef CONFIG_SILENT_CONSOLE
>  static void fixup_silent_linux(void);
>  #endif
> @@ -1175,7 +1181,7 @@ U_BOOT_CMD(
>  /* imls - list all images found in flash */
>  /*******************************************************************/
>  #if defined(CONFIG_CMD_IMLS)
> -static int do_imls(cmd_tbl_t *cmdtp, int flag, int argc, char *  
> const argv[])
> +static int do_imls_nor(void)
>  {
>  	flash_info_t *info;
>  	int i, j;
> @@ -1224,6 +1230,161 @@ next_sector:		;
>  		}
>  next_bank:	;
>  	}
> +	return 0;
> +}
> +#endif
> +
> +#if defined(CONFIG_CMD_IMLS_NAND)
> +static int nand_imls_legacyimage(nand_info_t *nand, int nand_dev,  
> loff_t off,
> +		size_t len)
> +{
> +	void *imgdata;
> +	int ret;
> +
> +	imgdata = malloc(len);
> +	if (!imgdata) {
> +		printf("May be a Legacy Image at NAND device %d offset  
> %08llX:\n",
> +				nand_dev, off);
> +		printf("   Low memory(cannot allocate memory for  
> image)\n");
> +		return -ENOMEM;
> +	}

So, it looks like any reasonably-sized kernel image is going to hit  
this out-of-memory condition given how unreasonably small U-Boot malloc  
heaps generally are.

As a side note, running this showed U-Boot itself as "may be a legacy  
image"... it seems that for some reason all the ppc arches start with  
the uImage header, but otherwise aren't valid uImages.

-Scott