[PATCH v3 4/6] openbmc: Generate images that erase empty NOR sections

[Joel Stanley]

On Wed, Feb 24, 2016 at 1:15 AM, Andrew Jeffery <andrew at aj.id.au> wrote:

Why do we need to do this?

> Signed-off-by: Andrew Jeffery <andrew at aj.id.au>
> ---
>  meta-phosphor/classes/obmc-phosphor-image_types_uboot.bbclass | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/meta-phosphor/classes/obmc-phosphor-image_types_uboot.bbclass b/meta-phosphor/classes/obmc-phosphor-image_types_uboot.bbclass
> index bf987bb..96193a3 100644
> --- a/meta-phosphor/classes/obmc-phosphor-image_types_uboot.bbclass
> +++ b/meta-phosphor/classes/obmc-phosphor-image_types_uboot.bbclass
> @@ -27,6 +27,13 @@ RWFS_SIZE ?= "4096"
>
>  # IMAGE_POSTPROCESS_COMMAND += "do_generate_flash"
>
> +mk_nor_image() {
> +       image_dst="$1"
> +       image_size_kb=$2
> +       dd if=/dev/zero bs=1k count=${image_size_kb} \
> +              | tr '\000' '\377' > ${image_dst}
> +}
> +
>  do_generate_flash() {
>         INITRD_CTYPE=${INITRAMFS_CTYPE}
>         ddir="${DEPLOY_DIR_IMAGE}"
> @@ -51,12 +58,12 @@ do_generate_flash() {
>         fi
>
>         oe_mkimage  "${initrd}" "${INITRD_CTYPE}" || bbfatal "oe_mkimage initrd"
> -       dd if=/dev/zero of=${ddir}/${rwfs} bs=1k count=${RWFS_SIZE}
> +       mk_nor_image ${ddir}/${rwfs} ${RWFS_SIZE}
>         mkfs.${OVERLAY_BASETYPE} -b 4096 -F -O^huge_file ${ddir}/${rwfs} || bbfatal "mkfs rwfs"
>
>         dst="${ddir}/${FLASH_IMAGE_NAME}"
>         rm -rf $dst
> -       dd if=/dev/zero of=${dst} bs=1k count=${FLASH_SIZE}
> +       mk_nor_image ${dst} ${FLASH_SIZE}
>         dd if=${ddir}/${uboot} of=${dst} bs=1k seek=${FLASH_UBOOT_OFFSET}
>         dd if=${ddir}/${kernel} of=${dst} bs=1k seek=${FLASH_KERNEL_OFFSET}
>         dd if=${ddir}/${uinitrd} of=${dst} bs=1k seek=${FLASH_INITRD_OFFSET}
> --
> 2.5.0
>
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