1 files changed, 62 insertions, 0 deletions
diff --git a/common/shared_mem_libc.c b/common/shared_mem_libc.c
new file mode 100644
index 0000000000..5013562c26
--- /dev/null
+++ b/common/shared_mem_libc.c
@@ -0,0 +1,62 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/**
+ * @brief Shared mem implementation that uses malloc/free from libc.
+ */
+
+#include "common.h"
+#include "console.h"
+#include "shared_mem.h"
+#include "task.h"
+
+#include <stdlib.h>
+
+#include <malloc.h>
+
+int shared_mem_size(void)
+{
+	struct mallinfo info = mallinfo();
+
+	return info.fordblks + info.fsmblks;
+}
+
+int shared_mem_acquire(int size, char **dest_ptr)
+{
+	*dest_ptr = NULL;
+
+	if (in_interrupt_context())
+		return EC_ERROR_INVAL;
+
+	*dest_ptr = malloc(size);
+	if (!*dest_ptr)
+		return EC_ERROR_MEMORY_ALLOCATION;
+
+	return EC_SUCCESS;
+}
+
+void shared_mem_release(void *ptr)
+{
+	if (in_interrupt_context())
+		return;
+
+	free(ptr);
+}
+
+#ifdef CONFIG_CMD_SHMEM
+static int command_shmem(int argc, const char **argv)
+{
+	struct mallinfo info = mallinfo();
+
+	ccprintf("Total:         %d\n",
+		 info.uordblks + info.fordblks + info.fsmblks);
+	ccprintf("Allocated:     %d\n", info.uordblks);
+	ccprintf("Free:          %d\n", info.fordblks + info.fsmblks);
+
+	return EC_SUCCESS;
+}
+DECLARE_SAFE_CONSOLE_COMMAND(shmem, command_shmem, NULL,
+			     "Print shared memory stats");
+#endif /* CONFIG_CMD_SHMEM */