target-arm: A64: Implement DC ZVA
Implement the DC ZVA instruction, which clears a block of memory.
The fast path obtains a pointer to the underlying RAM via the TCG TLB
data structure so we can do a direct memset(), with fallback to a
simple byte-store loop in the slow path.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index 0ec2f65..4c5402a 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -1335,6 +1335,11 @@
tcg_rt = cpu_reg(s, rt);
tcg_gen_movi_i64(tcg_rt, s->current_pl << 2);
return;
+ case ARM_CP_DC_ZVA:
+ /* Writes clear the aligned block of memory which rt points into. */
+ tcg_rt = cpu_reg(s, rt);
+ gen_helper_dc_zva(cpu_env, tcg_rt);
+ return;
default:
break;
}
