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Cortex-A57: Implement workaround for erratum 817169

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Change-Id: I25f29a275ecccd7d0c9d33906e6c85967caa767a
Signed-off-by: Ambroise Vincent <ambroise.vincent@arm.com>
This commit is contained in:
Ambroise Vincent 2019-02-21 16:35:49 +00:00
parent 0f6fbbd2e5
commit 5bd2c24f17
4 changed files with 55 additions and 0 deletions
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3
docs/cpu-specific-build-macros.rst
View file

@ -128,6 +128,9 @@ For Cortex-A57, the following errata build flags are defined :
- ``ERRATA_A57_814670``: This applies errata 814670 workaround to Cortex-A57
CPU. This needs to be enabled only for revision r0p0 of the CPU.
- ``ERRATA_A57_817169``: This applies errata 817169 workaround to Cortex-A57
CPU. This needs to be enabled only for revision <= r0p1 of the CPU.
- ``ERRATA_A57_826974``: This applies errata 826974 workaround to Cortex-A57
CPU. This needs to be enabled only for revision <= r1p1 of the CPU.

22
lib/cpus/aarch32/cortex_a57.S
View file

@ -46,6 +46,13 @@ func cortex_a57_disable_ext_debug
mov r0, #1
stcopr r0, DBGOSDLR
isb
#if ERRATA_A57_817169
/*
* Invalidate any TLB address
*/
mov r0, #0
stcopr r0, TLBIMVA
#endif
dsb sy
bx lr
endfunc cortex_a57_disable_ext_debug
@ -152,6 +159,20 @@ func check_errata_814670
b cpu_rev_var_ls
endfunc check_errata_814670
/* ----------------------------------------------------
* Errata Workaround for Cortex A57 Errata #817169.
* This applies only to revision <= r0p1 of Cortex A57.
* ----------------------------------------------------
*/
func check_errata_817169
/*
* Even though this is only needed for revision <= r0p1, it
* is always applied because of the low cost of the workaround.
*/
mov r0, #ERRATA_APPLIES
bx lr
endfunc check_errata_817169
/* --------------------------------------------------------------------
* Disable the over-read from the LDNP instruction.
*
@ -568,6 +589,7 @@ func cortex_a57_errata_report
report_errata ERRATA_A57_813419, cortex_a57, 813419
report_errata ERRATA_A57_813420, cortex_a57, 813420
report_errata ERRATA_A57_814670, cortex_a57, 814670
report_errata ERRATA_A57_817169, cortex_a57, 817169
report_errata A57_DISABLE_NON_TEMPORAL_HINT, cortex_a57, \
disable_ldnp_overread
report_errata ERRATA_A57_826974, cortex_a57, 826974

22
lib/cpus/aarch64/cortex_a57.S
View file

@ -59,6 +59,13 @@ func cortex_a57_disable_ext_debug
mov x0, #1
msr osdlr_el1, x0
isb
#if ERRATA_A57_817169
/*
* Invalidate any TLB address
*/
mov x0, #0
tlbi vae3, x0
#endif
dsb sy
ret
endfunc cortex_a57_disable_ext_debug
@ -160,6 +167,20 @@ func check_errata_814670
b cpu_rev_var_ls
endfunc check_errata_814670
/* ----------------------------------------------------
* Errata Workaround for Cortex A57 Errata #817169.
* This applies only to revision <= r0p1 of Cortex A57.
* ----------------------------------------------------
*/
func check_errata_817169
/*
* Even though this is only needed for revision <= r0p1, it
* is always applied because of the low cost of the workaround.
*/
mov x0, #ERRATA_APPLIES
ret
endfunc check_errata_817169
/* --------------------------------------------------------------------
* Disable the over-read from the LDNP instruction.
*
@ -571,6 +592,7 @@ func cortex_a57_errata_report
report_errata ERRATA_A57_813419, cortex_a57, 813419
report_errata ERRATA_A57_813420, cortex_a57, 813420
report_errata ERRATA_A57_814670, cortex_a57, 814670
report_errata ERRATA_A57_817169, cortex_a57, 817169
report_errata A57_DISABLE_NON_TEMPORAL_HINT, cortex_a57, \
disable_ldnp_overread
report_errata ERRATA_A57_826974, cortex_a57, 826974

8
lib/cpus/cpu-ops.mk
View file

@ -115,6 +115,10 @@ ERRATA_A57_813420 ?=0
# only to revision r0p0 of the Cortex A57 cpu.
ERRATA_A57_814670 ?=0
# Flag to apply erratum 817169 workaround during power down. This erratum
# applies only to revision <= r0p1 of the Cortex A57 cpu.
ERRATA_A57_817169 ?=0
# Flag to apply erratum 826974 workaround during reset. This erratum applies
# only to revision <= r1p1 of the Cortex A57 cpu.
ERRATA_A57_826974 ?=0
@ -208,6 +212,10 @@ $(eval $(call add_define,ERRATA_A57_813420))
$(eval $(call assert_boolean,ERRATA_A57_814670))
$(eval $(call add_define,ERRATA_A57_814670))
# Process ERRATA_A57_817169 flag
$(eval $(call assert_boolean,ERRATA_A57_817169))
$(eval $(call add_define,ERRATA_A57_817169))
# Process ERRATA_A57_826974 flag
$(eval $(call assert_boolean,ERRATA_A57_826974))
$(eval $(call add_define,ERRATA_A57_826974))