linux-gen: atomic: move odp_atomic_lock_free implementations under arch

Enables architecture specific implementations.

Signed-off-by: Matias Elo <matias.elo@nokia.com>
Reviewed-by: Petri Savolainen <petri.savolainen@nokia.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/platform/linux-generic/arch/aarch64/odp_atomic.c b/platform/linux-generic/arch/aarch64/odp_atomic.c
new file mode 100644
index 000000000..13ba2e5ed
--- /dev/null
+++ b/platform/linux-generic/arch/aarch64/odp_atomic.c
@@ -0,0 +1,47 @@
+/* Copyright (c) 2015-2018, Linaro Limited
+ * Copyright (c) 2021, ARM Limited
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ */
+
+#include <odp/api/atomic.h>
+
+int odp_atomic_lock_free_u64(odp_atomic_op_t *atomic_op)
+{
+#if __GCC_ATOMIC_LLONG_LOCK_FREE < 2
+	/* All operations have locks */
+	if (atomic_op)
+		atomic_op->all_bits = 0;
+
+	return 0;
+#else
+	/* All operations are lock-free */
+	if (atomic_op) {
+		atomic_op->all_bits = ~((uint32_t)0);
+		atomic_op->op.init  = 0;
+	}
+
+	return 2;
+#endif
+}
+
+int odp_atomic_lock_free_u128(odp_atomic_op_t *atomic_op)
+{
+#ifdef _ODP_LOCK_FREE_128BIT_ATOMICS
+	if (atomic_op) {
+		atomic_op->all_bits = 0;
+		atomic_op->op.load  = 1;
+		atomic_op->op.store = 1;
+		atomic_op->op.cas  = 1;
+	}
+
+	return 2;
+#else
+	/* All operations have locks */
+	if (atomic_op)
+		atomic_op->all_bits = 0;
+
+	return 0;
+#endif
+}