This reverts commit 45f41c134b.
This weird workaround was the best I came up with at that time
to boot U-Boot from TF-A.
I noticed U-Boot successfully boots on LD20 (i.e. CA72 CPU) by using
the latest TF-A.
Specifically, since the following TF-A commit, U-Boot runs at EL2
instead of EL1, and this issue went away as a side-effect.
|commit f998a052fd94ea082833109f25b94ed5bfa24e8b
|Author: Masahiro Yamada <yamada.masahiro@socionext.com>
|Date: Thu Jul 25 10:57:38 2019 +0900
|
| uniphier: run BL33 at EL2
|
| All the SoCs in 64-bit UniPhier SoC family support EL2.
|
| Just hard-code MODE_EL2 instead of using el_implemented() helper.
|
| Change-Id: I7ab48002c5205bc8c013e1b46313b57d6c431db0
| Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
However, if I reverted that, this problem would come back, presumably
because some EL1 code in U-Boot triggers this issue.
Now that commit f8ddd8cbb5 ("arm64: issue ISB after updating system
registers") fixed this issue properly, this weird workaround is no
longer needed irrespective of the exception level at which U-Boot runs.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
<common.h> pulls in a lot of bloat. <common.h> is unneeded in most of
places.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Currently, mem_map is hard-coded, and it worked well until the last
SoC. For a planned new SoC, the addresses of peripherals and DRAM
will be changed. Set it up run-time.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <trini@konsulko.com>
It has been a while since ARM Trusted Firmware supported UniPhier SoC
family. U-Boot SPL was intended as a temporary loader that runs in
secure world. It is a maintenance headache to support two different
boot mechanisms. Secure firmware is realm of ARM Trusted Firmware
and now U-Boot only serves as a non-secure boot loader for UniPhier
ARMv8 SoCs.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Fix warnings reported by sparse:
- ... was not declared. Should it be static?"
- cast to restricted __be32
While fixing those, the type conflict of cci500_init() was found.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When booting from ARM Trusted Firmware, U-Boot runs in EL1-NS.
The boot flow is as follows:
BL1 -> BL2 -> BL31 -> BL33 (i.e. U-Boot)
This boot sequence works fine for LD11 SoC (Cortex-A53), but LD20
SoC (Cortex-A72) hangs in U-Boot. The solution I found is to
read sctlr_el1 and write back the value as-is. This should be
no effect, but surprisingly fixes the problem for LD20 to boot.
I do not know why.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
We may want to run different firmware before running U-Boot. For
example, ARM Trusted Firmware runs before U-Boot, making U-Boot
a non-secure world boot loader. In this case, the SoC might be
initialized there, which enables us to skip SPL entirely.
This commit removes "select SPL" to make it configurable. This
also enables the Multi SoC support for the UniPhier ARMv8 SoCs.
(CONFIG_ARCH_UNIPHIER_V8_MULTI) Thanks to the driver model and
Device Tree, the U-Boot proper part is now written in a generic way.
The board/SoC parameters reside in DT. The Multi SoC support
increases the memory footprint a bit, but the U-Boot proper does
not have strict memory constraint. This will mitigate the per-SoC
(sometimes per-board) defconfig burden.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This does not have much impact on behavior, but makes code look more
more like Linux. The use of devm_ioremap() often helps to delete
.remove callbacks entirely.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Introduce virtual and physical addresses in the mapping table. This change
have no impact on existing boards because they all use idential mapping.
Signed-off-by: York Sun <york.sun@nxp.com>
I noticed secondary CPUs sometimes fail to wake up, and the root
cause is that the sev instruction wakes up slave CPUs before the
preceding the register write is observed by them.
The read-back of the accessed register does not guarantee the order.
In order to ensure the order between the register write and the sev
instruction, a dsb instruction should be executed prior to the sev.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
