feat(rss): adjust parameter packing to match TF-M changes
Adjust the parameter packing scheme in RSS communication
to align with changes made in TF-M: 3be6c395 [1]
[1]: https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/commit/?id=3be6c3954b94f000cdcf7575bd4c18f57b3492f8
Change-Id: Ief38f96ab991d1125b37adfced5ffafc39e754a0
Signed-off-by: David Vincze <david.vincze@arm.com>
diff --git a/drivers/arm/rss/rss_comms_protocol_common.h b/drivers/arm/rss/rss_comms_protocol_common.h
new file mode 100644
index 0000000..177d636
--- /dev/null
+++ b/drivers/arm/rss/rss_comms_protocol_common.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2024, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+/*
+ * Packing scheme of the control parameter
+ *
+ * 31 30-28 27 26-24 23-20 19 18-16 15-0
+ * +------------+-----+------+-------+-----+-------+-------+------+
+ * | | | | invec | | | outvec| type |
+ * | Res | Res | Res | number| Res | Res | number| |
+ * +------------+-----+------+-------+-----+-------+-------+------+
+ *
+ * Res: Reserved.
+ */
+
+#ifndef RSS_COMMS_PROTOCOL_COMMON
+#define RSS_COMMS_PROTOCOL_COMMON
+
+#define TYPE_OFFSET (0U)
+#define TYPE_MASK (0xFFFFUL << TYPE_OFFSET)
+#define IN_LEN_OFFSET (24U)
+#define IN_LEN_MASK (0x7UL << IN_LEN_OFFSET)
+#define OUT_LEN_OFFSET (16U)
+#define OUT_LEN_MASK (0x7UL << OUT_LEN_OFFSET)
+
+#define PARAM_PACK(type, in_len, out_len) \
+ (((((uint32_t)(type)) << TYPE_OFFSET) & TYPE_MASK) | \
+ ((((uint32_t)(in_len)) << IN_LEN_OFFSET) & IN_LEN_MASK) | \
+ ((((uint32_t)(out_len)) << OUT_LEN_OFFSET) & OUT_LEN_MASK))
+
+#endif /* RSS_COMMS_PROTOCOL_COMMON */