feat(nxp/common): add CORTEX A53 helper functions
Add helper function to disable the load-store prefetch.
Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: I36d7be37e0b800ab1e5842a56cfd04d779338868
diff --git a/plat/nxp/common/aarch64/ls_helpers.S b/plat/nxp/common/aarch64/ls_helpers.S
index 19ea9e5..311dce1 100644
--- a/plat/nxp/common/aarch64/ls_helpers.S
+++ b/plat/nxp/common/aarch64/ls_helpers.S
@@ -6,6 +6,7 @@
*/
#include <asm_macros.S>
+#include <cortex_a53.h>
#include <drivers/console.h>
#include <lib/cpus/aarch64/cortex_a72.h>
@@ -156,6 +157,31 @@
#endif
/* this function disables the load-store prefetch of the calling core
+ * Note: this function is for A53 cores ONLY
+ * in: none
+ * out: none
+ * uses x0
+ */
+func _disable_ldstr_pfetch_A53
+ mrs x0, CORTEX_A53_CPUACTLR_EL1
+ tst x0, #CORTEX_A53_CPUACTLR_EL1_L1PCTL
+ b.ne 1f
+ b 2f
+
+.align 6
+1:
+ dsb sy
+ isb
+ bic x0, x0, #CORTEX_A53_CPUACTLR_EL1_L1PCTL
+ msr CORTEX_A53_CPUACTLR_EL1, x0
+ isb
+
+2:
+ ret
+endfunc _disable_ldstr_pfetch_A53
+
+
+/* this function disables the load-store prefetch of the calling core
* Note: this function is for A72 cores ONLY
* in: none
* out: none