Workaround for Cortex A78 erratum 1951500
Cortex A78 erratum 1951500 is a Cat B erratum that applies to revisions
r0p0, r1p0, and r1p1. The workaround is to insert a DMB ST before
acquire atomic instructions without release semantics. This workaround
works on revisions r1p0 and r1p1, in r0p0 there is no workaround.
SDEN can be found here:
https://documentation-service.arm.com/static/5fb66157ca04df4095c1cc2e
Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I47610cee75af6a127ea65edc4d5cffc7e6a2d0a3
diff --git a/include/lib/cpus/errata_report.h b/include/lib/cpus/errata_report.h
index 7cac77e..efdedf0 100644
--- a/include/lib/cpus/errata_report.h
+++ b/include/lib/cpus/errata_report.h
@@ -30,4 +30,7 @@
#define ERRATA_APPLIES 1
#define ERRATA_MISSING 2
+/* Macro to get CPU revision code for checking errata version compatibility. */
+#define CPU_REV(r, p) ((r << 4) | p)
+
#endif /* ERRATA_REPORT_H */