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| author | Joel Hutton <Joel.Hutton@arm.com> | 2019-04-10 12:52:52 +0100 |
|---|---|---|
| committer | Joel Hutton <Joel.Hutton@arm.com> | 2019-04-12 10:10:32 +0000 |
| commit | dd4cf2c74566c18adbb04944e6bf7a974276ec16 (patch) | |
| tree | 2a2f89a32d67a4e97164aef6c2394360e6bc633a /docs | |
| parent | c554e1ad82b0cf874a76e4685a4da61da14da1fe (diff) | |
| download | platform_external_arm-trusted-firmware-dd4cf2c74566c18adbb04944e6bf7a974276ec16.tar.gz platform_external_arm-trusted-firmware-dd4cf2c74566c18adbb04944e6bf7a974276ec16.tar.bz2 platform_external_arm-trusted-firmware-dd4cf2c74566c18adbb04944e6bf7a974276ec16.zip | |
Cortex A9:errata 794073 workaround
On Cortex A9 an errata can cause the processor to violate the rules for
speculative fetches when the MMU is off but branch prediction has not
been disabled. The workaround for this is to execute an Invalidate
Entire Branch Prediction Array (BPIALL) followed by a DSB.
see:http://arminfo.emea.arm.com/help/topic/com.arm.doc.uan0009d/UAN0009_cortex_a9_errata_r4.pdf
for more details.
Change-Id: I9146c1fa7563a79f4e15b6251617b9620a587c93
Signed-off-by: Joel Hutton <Joel.Hutton@arm.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/cpu-specific-build-macros.rst | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/docs/cpu-specific-build-macros.rst b/docs/cpu-specific-build-macros.rst index ca3366dc5..222c6a7fd 100644 --- a/docs/cpu-specific-build-macros.rst +++ b/docs/cpu-specific-build-macros.rst @@ -71,6 +71,11 @@ for it to specify which errata workarounds should be enabled or not. The value of the build flags is 0 by default, that is, disabled. A value of 1 will enable it. +For Cortex-A9, the following errata build flags are defined : + +- ``ERRATA_A9_794073``: This applies errata 794073 workaround to Cortex-A15 + CPU. This needs to be enabled for all revisions of the CPU. + For Cortex-A15, the following errata build flags are defined : - ``ERRATA_A15_816470``: This applies errata 816470 workaround to Cortex-A15 @@ -260,7 +265,7 @@ architecture that can be enabled by the platform as desired. -------------- -*Copyright (c) 2014-2018, Arm Limited and Contributors. All rights reserved.* +*Copyright (c) 2014-2019, Arm Limited and Contributors. All rights reserved.* .. _CVE-2017-5715: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5715 .. _CVE-2018-3639: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3639 |