u-boot.git/arch/arm/cpu/armv8/cpu.c, branch master

armv8: cpu: Implement allow_unaligned()

2024-11-17T19:13:22+00:00

Usually ARMv8 platforms allow unaligned access for Normal memory. But
some chips might not allow it by default, having SCTLR.A bit set to 1
before U-Boot execution. One such example is Exynos850 SoC. As
allow_unaligned() is not implemented for ARMv8 at the moment, its __weak
implementation is used, which does nothing. That might lead to unaligned
access abort, for example when running EFI selftest. Fix that by
implementing allow_unaligned() for ARMv8.

The issue was found when running EFI selftest on E850-96 board
(Exynos850 based):

    => bootefi selftest $fdtcontroladdr

    ...
    Executing 'HII database protocols'
    "Synchronous Abort" handler, esr 0x96000021, far 0xbaac0991
    ...
    resetting ...

Unaligned abort happens in u16_strnlen(), which is called from
efi_hii_sibt_string_ucs2_block_next():

    u16_strlen(blk->string_text)

where 'blk' type is struct efi_hii_sibt_string_ucs2_block. Because this
struct is packed, doing "->string_text" makes 'blk' address incremented
by 1 byte, which makes it unaligned. Although allow_unaligned() was
called in efi_init_early() before EFI selftest execution, it wasn't
implemented for ARMv8 CPUs, so data abort happened.

Signed-off-by: Sam Protsenko

Restore patch series "arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"

2024-05-20T19:35:03+00:00

As part of bringing the master branch back in to next, we need to allow
for all of these changes to exist here.

Reported-by: Jonas Karlman 
Signed-off-by: Tom Rini

Revert "Merge patch series "arm: dts: am62-beagleplay: Fix Beagleplay Ethernet""

2024-05-19T14:16:36+00:00

When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay
Ethernet"' I failed to notice that b4 noticed it was based on next and
so took that as the base commit and merged that part of next to master.

This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing
changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35.

Reported-by: Jonas Karlman 
Signed-off-by: Tom Rini

arm: Remove and add needed includes

2024-05-06T21:06:34+00:00

Remove  from the remainder of the files under arch/arm and
when needed add missing include files directly.

Signed-off-by: Tom Rini

arm: cpu: Add optional CMOs by VA

2023-03-06T22:03:55+00:00

Exposing set/way cache maintenance to a virtual machine is unsafe, not
least because the instructions are not permission-checked but also
because they are not broadcast between CPUs. Consequently, KVM traps and
emulates such maintenance in the host kernel using by-VA operations and
looping over the stage-2 page-tables. However, when running under
protected KVM, these instructions are not able to be emulated and will
instead result in an exception being delivered to the guest.

Introduce CONFIG_CMO_BY_VA_ONLY so that virtual platforms can select
this option and perform by-VA cache maintenance instead of using the
set/way instructions.

Signed-off-by: Marc Zyngier 
Signed-off-by: Will Deacon 
Signed-off-by: Pierre-Clément Tosi 
[ Paul: pick from the Android tree. Fixup Pierre's commit. And fix some
  checkpatch warnings. Rebased to upstream. ]
Signed-off-by: Ying-Chun Liu (PaulLiu) 
Cc: Tom Rini 
Link: https://android.googlesource.com/platform/external/u-boot/+/db5507f47f4f57f766d52f753ff2cc761afc213b
Link: https://android.googlesource.com/platform/external/u-boot/+/2baf54e743380a1e4a6bc2dbdde020a2e783ff67

armv8: psci: skip setup code if we are not EL3

2022-04-26T11:43:57+00:00

If we are running in EL2 skip PSCI implementation setup. This avoids an
exception if CONFIG_ARMV8_PSCI is set, but u-boot is started by TF-A.

Signed-off-by: Michael Walle 
Reviewed-by: Priyanka Jain

common: Drop net.h from common header

2020-05-18T21:33:31+00:00

Move this header out of the common header. Network support is used in
quite a few places but it still does not warrant blanket inclusion.

Note that this net.h header itself has quite a lot in it. It could be
split into the driver-mode support, functions, structures, checksumming,
etc.

Signed-off-by: Simon Glass

t210: do not enable PLLE and UPHY PLL HW PWRSEQ

2020-04-02T21:30:01+00:00

This commit removes the programming sequence that enables PLLE and UPHY
PLL hardware power sequencers. Per TRM, boot software should enable PLLE
and UPHY PLLs in software controlled power-on state and should power
down PLL before jumping into kernel or the next stage boot software.

Adds call to board_cleanup_before_linux to facilitate this.

Signed-off-by: JC Kuo 
Signed-off-by: Tom Warren 
Acked-by: Stephen Warren

common: Move enable/disable_interrupts out of common.h

2019-12-02T23:25:01+00:00

Move these two functions into the irq_funcs.h header file. Also move
interrupt_handler_t as this is used by the irq_install_handler() function.

Signed-off-by: Simon Glass 
Reviewed-by: Tom Rini

common: Move some cache and MMU functions out of common.h

2019-12-02T23:23:55+00:00

These functions belong in cpu_func.h. Another option would be cache.h
but that code uses driver model and we have not moved these cache
functions to use driver model. Since they are CPU-related it seems
reasonable to put them here.

Move them over.

Signed-off-by: Simon Glass 
Reviewed-by: Tom Rini