udebug-priv.h

   1 /*
   2  * udebug - debug ring buffer library
   3  *
   4  * Copyright (C) 2023 Felix Fietkau <nbd@nbd.name>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #ifndef __UDEBUG_UTIL_H
  19 #define __UDEBUG_UTIL_H
  20
  21 #include "blobmsg.h"
  22 #include "udebug.h"
  23 #include "udebug-proto.h"
  24
  25 #define UDEBUG_TIMEOUT  1000
  26
  27 __hidden int udebug_buf_open(struct udebug_buf *buf, int fd, uint32_t ring_size, uint32_t data_size);
  28 __hidden struct udebug_client_msg *__udebug_poll(struct udebug *ctx, int *fd, bool wait);
  29 __hidden void udebug_send_msg(struct udebug *ctx, struct udebug_client_msg *msg,
  30                      struct blob_attr *meta, int fd);
  31
  32 static inline int32_t u32_sub(uint32_t a, uint32_t b)
  33 {
  34         return a - b;
  35 }
  36
  37 static inline int32_t u32_max(uint32_t a, uint32_t b)
  38 {
  39         return u32_sub(a, b) > 0 ? a : b;
  40 }
  41
  42 static inline void u32_set(void *ptr, uint32_t val)
  43 {
  44         volatile uint32_t *v = ptr;
  45         *v = val;
  46 }
  47
  48 static inline uint32_t u32_get(void *ptr)
  49 {
  50         volatile uint32_t *v = ptr;
  51         return *v;
  52 }
  53
  54 #endif