udebug: add udebug library code

Copied and adapted from udebug.git

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 54 insertions, 0 deletions

diff --git a/udebug-priv.h b/udebug-priv.h
new file mode 100644
index 0000000..9e43ddf
--- /dev/null
+++ b/udebug-priv.h
@@ -0,0 +1,54 @@
+/*
+ * udebug - debug ring buffer library
+ *
+ * Copyright (C) 2023 Felix Fietkau <nbd@nbd.name>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifndef __UDEBUG_UTIL_H
+#define __UDEBUG_UTIL_H
+
+#include "blobmsg.h"
+#include "udebug.h"
+#include "udebug-proto.h"
+
+#define UDEBUG_TIMEOUT	1000
+
+__hidden int udebug_buf_open(struct udebug_buf *buf, int fd, uint32_t ring_size, uint32_t data_size);
+__hidden struct udebug_client_msg *__udebug_poll(struct udebug *ctx, int *fd, bool wait);
+__hidden void udebug_send_msg(struct udebug *ctx, struct udebug_client_msg *msg,
+		     struct blob_attr *meta, int fd);
+
+static inline int32_t u32_sub(uint32_t a, uint32_t b)
+{
+	return a - b;
+}
+
+static inline int32_t u32_max(uint32_t a, uint32_t b)
+{
+	return u32_sub(a, b) > 0 ? a : b;
+}
+
+static inline void u32_set(void *ptr, uint32_t val)
+{
+	volatile uint32_t *v = ptr;
+	*v = val;
+}
+
+static inline uint32_t u32_get(void *ptr)
+{
+	volatile uint32_t *v = ptr;
+	return *v;
+}
+
+#endif