feat(ls64): add a test for 64byte loads/stores instructions
This patch adds a test to verify the 64 byte load and store
instructions introduced by FEAT_LS64.
The test primarily executes instructions:
1. LD64B
2. ST64B
and ensures that the NS-EL2 has no dependency on EL3 while
running them.
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
Change-Id: I7a4ca0ee4a2c18bf0de030c72e35eb218bc6364c
diff --git a/tftf/tests/extensions/ls64/ls64_operations.S b/tftf/tests/extensions/ls64/ls64_operations.S
new file mode 100644
index 0000000..18f7a5f
--- /dev/null
+++ b/tftf/tests/extensions/ls64/ls64_operations.S
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2024, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <asm_macros.S>
+
+#if __aarch64__
+
+ .arch armv8.7-a
+ .globl ls64_store
+ .globl ls64_load
+
+/*
+ * Function to store 64 bytes of data from consecutive registers into a memory
+ * location in single-copy atomic operation via st64b instruction.
+ *
+ * x0: Holds the base address of the input array of 8 64-bit integers.
+ * x1: Holds the base address of the destination/output array of 8 64-bit
+ * integers, where st64b does the single-copy atomic 64-byte store.
+ * x8-x15: Consecutive registers loaded with input array.
+ *
+ */
+func ls64_store
+ ldp x8, x9, [x0, #0] /* x0: Base address of Input Array */
+ ldp x10, x11, [x0, #16]
+ ldp x12, x13, [x0, #32]
+ ldp x14, x15, [x0, #48]
+ st64b x8, [x1] /* x1: Address where 64-byte data to be stored */
+ ret
+endfunc ls64_store
+
+/*
+ * Function to load 64-byte of data from a memory location to eight consecutive
+ * 64-bit registers in single-copy atomic operation via ld64b instruction.
+ *
+ * x0: Holds the address of memory from where 64-byte of data to be loaded.
+ * x1: Holds the base address of the destination/output array of 8 64-bit integers.
+ * x9-x16: consecutive registers into which data will be copied with ld64b inst.
+ */
+
+func ls64_load
+ ld64b x4, [x0]
+ stp x4, x5, [x1, #0] /* Base address of destination buffer */
+ stp x6, x7, [x1, #16]
+ stp x8, x9, [x1, #32]
+ stp x10, x11, [x1, #48]
+ ret
+endfunc ls64_load
+
+#endif /* __aarch64__ */