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| author | Ahmad Fatoum <ahmad@a3f.at> | 2022-07-13 11:57:26 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2022-07-14 10:27:41 +0200 |
| commit | 403859e941e5c71b7df5a4bf4418e3dbfc6ab153 (patch) | |
| tree | abeb84041bef0217dcc2a59cecb2db8ec1e0f8c7 /pbl | |
| parent | 87ed5c44b3ef84835c83aa4f6375018d958ae9dc (diff) | |
| download | barebox-403859e941e5c71b7df5a4bf4418e3dbfc6ab153.tar.gz barebox-403859e941e5c71b7df5a4bf4418e3dbfc6ab153.tar.xz | |
pbl: make USE_COMPRESSED_DTB a PBL-only feature
All in-tree boards that reference __dtb_z_ symbols are already
multi-image capable and allow us to compress barebox proper by having
the prebootloader decompress it using the algorithm specified by the
CONFIG_IMAGE_COMPRESSION_* option.
DTB on the other hand, is handled specially and the optional compression
is always using LZO. It makes sense to use the same
CONFIG_IMAGE_COMPRESSION_* options for the DT too to make build system
integration easier.
To avoid special casing non-PBL support which lacks this options, just
drop USE_COMPRESSED_DTB there. If linking barebox for your downstream
board is broken by this:
- If not multi-image capable, consider porting it to use
ENTRY_FUNCTION(_WITHSTACK) instead
- If you are using __dtb_z_* in barebox proper, use normal __dtb_
and compress barebox as a whole instead with
CONFIG_IMAGE_COMPRESSION_*
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220713095730.1878941-2-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'pbl')
| -rw-r--r-- | pbl/Kconfig | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/pbl/Kconfig b/pbl/Kconfig index ce0acbb646..ec1886073e 100644 --- a/pbl/Kconfig +++ b/pbl/Kconfig @@ -28,6 +28,12 @@ config PBL_SINGLE_IMAGE if PBL_IMAGE +config USE_COMPRESSED_DTB + bool + depends on ARM || RISCV + select UNCOMPRESS + select LZO_DECOMPRESS + config PBL_RELOCATABLE depends on ARM || MIPS || RISCV bool "relocatable pbl image" |