[U-Boot] [PATCH v4 1/2] SPL: add support to boot from a partition type

[Marek Vasut]

On 02/03/2017 07:36 PM, Dalon Westergreen wrote:
> From: Dalon Westergreen <dalon.westergreen at intel.com>
> 
> the socfpga bootrom supports mmc booting from either a raw image
> starting at 0x0, or from a partition of type 0xa2.  This patch
> adds support for locating the boot image in the first type 0xa2
> partition found.
> 
> Assigned a partition number of -1 will cause a search for a
> partition of type CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
> and use it to find the u-boot image
> 
> Signed-off-by: Dalon Westergreen <dwesterg at gmail.com>
> 
> --
> Changes in V5:
>  - fix styling in if (..) per Tom's request
> Changes in V4:
>  - Try search for partition type and failover to the defined
>    partition number
> Changes in V3:
>  - Add depends on DOS_PARTITION
>  - Ensure that PARTTION_TYPE defaults to non-zero
>  - Add ifdef around sys_ind in disk_partition structure
> Changes in V2:
>  - Merge partition search into single partition function
> ---
>  common/spl/Kconfig   | 17 +++++++++++++++++
>  common/spl/spl_mmc.c | 15 +++++++++++++++
>  disk/part_dos.c      |  1 +
>  include/part.h       |  3 +++
>  4 files changed, 36 insertions(+)
> 
> diff --git a/common/spl/Kconfig b/common/spl/Kconfig
> index b2ba492..37e002f 100644
> --- a/common/spl/Kconfig
> +++ b/common/spl/Kconfig
> @@ -96,6 +96,23 @@ config SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR
>  	  Address on the MMC to load U-Boot from, when the MMC is being used
>  	  in raw mode. Units: MMC sectors (1 sector = 512 bytes).
>  
> +config SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
> +	bool "MMC raw mode: by partition type"
> +	depends on SPL && DOS_PARTITION
> +	default y if ARCH_SOCFPGA
> +	help
> +	  Use partition type for specifying U-Boot partition on MMC/SD in
> +	  raw mode. U-Boot will be loaded from the first partition of this
> +	  type to be found.
> +
> +config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE
> +	hex "Partition Type on the MMC to load U-Boot from"
> +	depends on SPL && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
> +	default 0xa2
> +	help
> +	  Partition Type on the MMC to load U-Boot from, when the MMC is being
> +	  used in raw mode.
> +
>  config TPL
>  	bool
>  	depends on SPL && SUPPORT_TPL
> diff --git a/common/spl/spl_mmc.c b/common/spl/spl_mmc.c
> index 0cd355c..f127aee 100644
> --- a/common/spl/spl_mmc.c
> +++ b/common/spl/spl_mmc.c
> @@ -157,6 +157,21 @@ static int mmc_load_image_raw_partition(struct spl_image_info *spl_image,
>  	disk_partition_t info;
>  	int err;
>  
> +#ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION_TYPE
> +	int type_part;
> +	/* Only support MBR so DOS_ENTRY_NUMBERS */
> +	for (type_part = 1; type_part <= DOS_ENTRY_NUMBERS; type_part++) {
> +		err = part_get_info(mmc_get_blk_desc(mmc), type_part, &info);
> +		if (err)
> +			continue;
> +		if (info.sys_ind == \

The backslash here is not needed.

> +			CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_TYPE) {
> +			partition = type_part;
> +			break;
> +		}
> +	}
> +#endif
> +
>  	err = part_get_info(mmc_get_blk_desc(mmc), partition, &info);
>  	if (err) {
>  #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
> diff --git a/disk/part_dos.c b/disk/part_dos.c
> index c77d881..7ede15e 100644
> --- a/disk/part_dos.c
> +++ b/disk/part_dos.c
> @@ -217,6 +217,7 @@ static int part_get_info_extended(struct blk_desc *dev_desc,
>  #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
>  			sprintf(info->uuid, "%08x-%02x", disksig, part_num);
>  #endif
> +			info->sys_ind = pt->sys_ind;
>  			return 0;
>  		}
>  
> diff --git a/include/part.h b/include/part.h
> index 9d0e20d..b6d1b33 100644
> --- a/include/part.h
> +++ b/include/part.h
> @@ -59,6 +59,9 @@ typedef struct disk_partition {
>  #ifdef CONFIG_PARTITION_TYPE_GUID
>  	char	type_guid[37];	/* type GUID as string, if exists	*/
>  #endif
> +#ifdef CONFIG_DOS_PARTITION
> +	uchar	sys_ind;	/* partition type 			*/
> +#endif
>  } disk_partition_t;
>  
>  /* Misc _get_dev functions */
> 


-- 
Best regards,
Marek Vasut