As per ARC HS databook (see chapter 5.3.3.2) it is required to add
3 NOPs after each write to IC_IVIC which we do from now on.
Signed-off-by: Alexey Brodkin <abrod...@synopsys.com>
Cc: Eugeniy Paltsev <palt...@synopsys.com>
---
arch/arc/lib/cache.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c
index cbae27e9fcec..d8741fe959c3 100644
--- a/arch/arc/lib/cache.c
+++ b/arch/arc/lib/cache.c
@@ -278,6 +278,13 @@ void invalidate_icache_all(void)
/* Any write to IC_IVIC register triggers invalidation of entire I$ */
if (icache_status()) {
write_aux_reg(ARC_AUX_IC_IVIC, 1);
+ /*
+ * As per ARC HS databook (see chapter 5.3.3.2)
+ * it is required to add 3 NOPs after each write to IC_IVIC.
+ */
+ __builtin_arc_nop();
+ __builtin_arc_nop();
+ __builtin_arc_nop();
read_aux_reg(ARC_AUX_IC_CTRL); /* blocks */
}
}
--
2.7.5
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