Many of the ARMv8 defconfigs can require firmware external to barebox
for proper operation: TF-A as BL31, DDR PHY firmware, SDRAM setup
or OP-TEE. This led to defconfigs that fail to build by default
unless the user installs the firmware files into the firmware directory.
While this worked for the SoC-specific defconfigs, it's really annoying
for the multi_v8_defconfig:
- The user will need to install firmware even for unrelated
platforms
- Some platforms like e.g. qemu-virt64, which need no firmware to
be compiled into barebox, can't be built just by using the
defconfig
For v2023.06.0, this was resolved by disabling boards that lack firmware
through hiding their Kconfig symbol. This has a few shortcomings:
- Firmware is looked up relative to source tree and can't take
CONFIG_EXTRA_FIRMWARE_DIR into account that early
- Firmware needs to exist at configure stage, which breaks
build system recipes that install firmware after configure
stage
- menuconfig e.g. in Yocto's cml1.bbclass doesn't take make options
into account that are otherwise used for olddefconfig and build
This series resolves the underlying issue differently: We record
whether firmware is missing and just continue the build till the end
at which time the build would succeed (with warnings) if new option
CONFIG_MISSING_FIRMWARE_ERROR was unset.
In any case, barebox images which contain firmware in their PBL
that's not available will be marked specially to reduce the risk
of accidentally putting them to use:
* They're truncated to zero size
* The final "images built:" section marks them as having firmware
missing, e.g. ** firmware missing for barebox-rk3568-bpi-r2pro.img**
* They are omitted from the listing in the barebox-flash-images file
* Each barebox-broken.img is accompanied with a
barebox-broken.img.missing-firmware containing a newline delimited
list of missing firmware images
Ahmad Fatoum (6):
firmware: reference pointer alignment defined in
<asm-generic/pointer.h>
firmware: turn missing firmware into linker error
firmware: optionally turn missing firmware errors into warnings
ARM: Rockchip: gracefully handle missing firmware
ARM64: unset CONFIG_MISSING_FIRMWARE_ERROR for Rockchip/i.MX
firmware: don't hardcode firmware paths in srctree for existence check
arch/arm/configs/imx_v8_defconfig | 1 +
arch/arm/configs/multi_v8_defconfig | 1 +
arch/arm/configs/rockchip_v8_defconfig | 1 +
arch/arm/mach-imx/Kconfig | 49 -------------------
arch/arm/mach-rockchip/Kconfig | 6 ---
firmware/Kconfig | 49 +++++--------------
firmware/Makefile | 18 +++++--
images/Makefile | 23 ++++++---
images/Makefile.rockchip | 68 +++++++++-----------------
scripts/Makefile.lib | 3 ++
10 files changed, 73 insertions(+), 146 deletions(-)
--
2.39.2
