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of_unflatten_dtb() doesn't check the size of the device tree blob
passed to it. Add a size argument end add checks for the size. Some
callers have no idea of the buffer size themselves, INT_MAX is passed
in these cases.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.barebox.org/20210624085223.14616-4-s.hauer@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Errors during device tree registration, while uncommon, are really
annoying, because the system may limp along and it's not clear where
the misbehavior originates from.
Failing the initcall of the device tree would improve user experience in
that error case. There is intentionally no early exit on error cases
to give barebox a chance to probe the serial driver to actually report
errors when DEBUG_LL is disabled.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20210531071239.30653-4-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Current qemu-virt64 barebox support doesn't look much like what's
offered on physical boards. It's not relocatable, lacks PBL and
doesn't use device tree. As qemu-system-aarch64 -M virt -kernel
already supplies an external device tree, we could just replace
all existing support with BOARD_ARM_GENERIC_DT, which builds a
barebox image that reuses an externally passed device tree.
The 32-bit ARM VIRT support has some board code for host name
setting and overlay applying to handle environment and state
on flash. We could do without that, given the new virtio-blk
support, but the code is already there, so reuse it and drop
all current virt64-specific board code.
As the barebox ELF image resulting from the build can no longer be
directly booted as before and only with -kernel, not -bios, rename
the Kconfig symbol, so existing users can notice this during build.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Add support for state and barebox environment by applying an overlay on
top of the qemu generated device tree. If qemu is used with a persistent
flash partition, this allows usage of environments and state across qemu
reboots.
Simple testing can be performed by starting with
qemu-system-arm -m 256M -M virt -kernel images/barebox-dt-2nd.img -nographic
Storing data, changing into the qemu console via Ctrl-A Ctrl-C, issuing
'system_reset' and Ctrl-A Ctrl-C to get back into the barebox console.
Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Necessary support to boot barebox on ARM qemu virt platforms.
No internal device tree, since it is passed by qemu. Therefore it
employs the generic 2nd stage image as the low level code and only adds
a virt specific board driver.
Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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