1 files changed, 37 insertions, 0 deletions

diff --git a/platforms/arm_atsam/atomic_util.h b/platforms/arm_atsam/atomic_util.h
new file mode 100644
index 000000000..848542d23
--- /dev/null
+++ b/platforms/arm_atsam/atomic_util.h
@@ -0,0 +1,37 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "samd51j18a.h"
+
+static __inline__ uint8_t __interrupt_disable__(void) {
+    __disable_irq();
+
+    return 1;
+}
+
+static __inline__ void __interrupt_enable__(const uint8_t *__s) {
+    __enable_irq();
+
+    __asm__ volatile("" ::: "memory");
+    (void)__s;
+}
+
+#define ATOMIC_BLOCK(type) for (type, __ToDo = __interrupt_disable__(); __ToDo; __ToDo = 0)
+#define ATOMIC_FORCEON uint8_t sreg_save __attribute__((__cleanup__(__interrupt_enable__))) = 0
+
+#define ATOMIC_BLOCK_RESTORESTATE _Static_assert(0, "ATOMIC_BLOCK_RESTORESTATE not implemented")
+#define ATOMIC_BLOCK_FORCEON ATOMIC_BLOCK(ATOMIC_FORCEON)