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fix(cpus): workaround for Cortex-A710 erratum 2742423

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Cortex-A710 erratum 2742423 is a Cat B erratum that applies to all
revisions <= r2p1 and is still open. The workaround is to set
CPUACTLR5_EL1[56:55] to 2'b01.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-1775101/latest

Change-Id: I4d9d3760491f1e6c59b2667c16d59b99cc7979f1
Signed-off-by: Bipin Ravi <bipin.ravi@arm.com>
This commit is contained in:
Bipin Ravi 2023-10-17 07:55:55 -05:00 • committed by laurenw-arm
parent 68085ad482
commit d7bc2cb430
4 changed files with 20 additions and 2 deletions
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4
docs/design/cpu-specific-build-macros.rst
View file

@ -612,6 +612,10 @@ For Cortex-A710, the following errata build flags are defined :
interconnect IP. This needs to be enabled for r0p0, r1p0, r2p0 and r2p1 and
is still open.
- ``ERRATA_A710_2742423``: This applies errata 2742423 workaround to
Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and
r2p1 of the CPU and is still open.
- ``ERRATA_A710_2768515``: This applies errata 2768515 workaround to
Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and
r2p1 of the CPU and is still open.

8
lib/cpus/aarch64/cortex_a710.S
View file

@ -178,6 +178,14 @@ workaround_reset_end cortex_a710, ERRATUM(2371105)
check_erratum_ls cortex_a710, ERRATUM(2371105), CPU_REV(2, 0)
workaround_reset_start cortex_a710, ERRATUM(2742423), ERRATA_A710_2742423
/* Set CPUACTLR5_EL1[56:55] to 2'b01 */
sysreg_bit_set CORTEX_A710_CPUACTLR5_EL1, BIT(55)
sysreg_bit_clear CORTEX_A710_CPUACTLR5_EL1, BIT(56)
workaround_reset_end cortex_a710, ERRATUM(2742423)
check_erratum_ls cortex_a710, ERRATUM(2742423), CPU_REV(2, 1)
workaround_runtime_start cortex_a710, ERRATUM(2768515), ERRATA_A710_2768515
/* dsb before isb of power down sequence */
dsb sy

5
lib/cpus/cpu-ops.mk
View file

@ -607,6 +607,11 @@ CPU_FLAG_LIST += ERRATA_A710_2371105
# and is still open.
CPU_FLAG_LIST += ERRATA_A710_2701952
# Flag to apply erratum 2742423 workaround during reset. This erratum applies
# to revision r0p0, r1p0, r2p0 and r2p1 of the Cortex-A710 cpu and is still
# open.
CPU_FLAG_LIST += ERRATA_A710_2742423
# Flag to apply erratum 2768515 workaround during power down. This erratum
# applies to revision r0p0, r1p0, r2p0 and r2p1 of the Cortex-A710 cpu and is
# still open.

5
services/std_svc/errata_abi/errata_abi_main.c
View file

@ -328,8 +328,9 @@ struct em_cpu_list cpu_list[] = {
[13] = {2371105, 0x00, 0x20, ERRATA_A710_2371105},
[14] = {2701952, 0x00, 0x21, ERRATA_A710_2701952, \
ERRATA_NON_ARM_INTERCONNECT},
[15] = {2768515, 0x00, 0x21, ERRATA_A710_2768515},
[16 ... ERRATA_LIST_END] = UNDEF_ERRATA,
[15] = {2742423, 0x00, 0x21, ERRATA_A710_2742423},
[16] = {2768515, 0x00, 0x21, ERRATA_A710_2768515},
[17 ... ERRATA_LIST_END] = UNDEF_ERRATA,
}
},
#endif /* CORTEX_A710_H_INC */