This series adds support for loading all image types (Legacy, FIT (with and without LOAD_FIT_FULL), and i.MX) to the MMC, SPI, NOR, NET, FAT, and EXT load methods. It does this by introducing a helper function which handles the minutiae of invoking the proper parsing function, and reading the rest of the image.
Hopefully, this will make it easier for load methods to support all image types that U-Boot supports, without having undocumented unsupported image types. I applied this to several loaders which were invoking spl_load_simple_fit and/or spl_parse_image_header, but I did not use it with others (e.g. DFU/RAM) which had complications in the mix.
Here's some bloat-o-meter for j7200_evm_a72_defconfig with ext4 support enabled:
add/remove: 1/0 grow/shrink: 2/4 up/down: 224/-236 (-12) Function old new delta spl_load - 176 +176 spl_fit_read 60 104 +44 spl_load_image_ext 364 368 +4 spl_nor_load_image 120 108 -12 spl_spi_load_image 280 228 -52 spl_load_image_fat 320 264 -56 spl_mmc_load 716 600 -116 Total: Before=264556, After=264544, chg -0.00%
ext4 support is +48 bytes, because the original image support was so bare-bones (just legacy/raw images). For most boards with a few load methods (where one of them isn't ext4), this series should be no bloat or a net negative. However, in the worst case this series will add 150-180 bytes.
I haven't tested most of this, so please try booting your favorite board with NOR/SPI flash, FAT, or falcon mode. I had a nand conversion in here as well, but dropped due to difficulties outlined in [1].
[1] https://lore.kernel.org/u-boot/c2ea7097-9e85-b9ec-e404-bd46eb83dd5b@seco.com...
Changes in v2: - Use reverse-xmas-tree style for locals in spl_simple_read. This is not complete, since overhead depends on bl_mask. - Convert semihosting as well - Consolidate spi_load_image_os into spl_spi_load_image
Sean Anderson (9): spl: Add generic spl_load function spl: Convert ext to use spl_load spl: Convert fat to spl_load spl: Convert mmc to spl_load spl: Convert net to spl_load spl: Convert nor to spl_load spl: Convert semihosting to spl_load spl: Convert spi to spl_load spl: spi: Consolidate spi_load_image_os into spl_spi_load_image
common/spl/spl.c | 61 ++++++++++++++++ common/spl/spl_ext.c | 24 +++++-- common/spl/spl_fat.c | 36 ++-------- common/spl/spl_mmc.c | 73 ++----------------- common/spl/spl_net.c | 24 ++----- common/spl/spl_nor.c | 35 ++-------- common/spl/spl_semihosting.c | 39 +++++------ common/spl/spl_spi.c | 131 ++++++++++------------------------- include/spl.h | 30 +++++++- 9 files changed, 184 insertions(+), 269 deletions(-)