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1070f01ac1
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 <semen.protsenko@linaro.org>
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| .. | ||
| bcmns3 | ||
| fsl-layerscape | ||
| hisilicon | ||
| xen | ||
| acpi_park_v8.S | ||
| cache_v8.c | ||
| cache.S | ||
| config.mk | ||
| cpu-dt.c | ||
| cpu.c | ||
| exception_level.c | ||
| exceptions.S | ||
| fel_utils.S | ||
| fwcall.c | ||
| generic_timer.c | ||
| Kconfig | ||
| linux-kernel-image-header-vars.h | ||
| Makefile | ||
| psci.S | ||
| sec_firmware_asm.S | ||
| sec_firmware.c | ||
| sha1_ce_core.S | ||
| sha1_ce_glue.c | ||
| sha256_ce_core.S | ||
| sha256_ce_glue.c | ||
| smccc-call.S | ||
| spin_table_v8.S | ||
| spin_table.c | ||
| spl_data.c | ||
| start.S | ||
| tlb.S | ||
| transition.S | ||
| u-boot-spl.lds | ||
| u-boot.lds | ||