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printk.h revision 1.2 
      1 /*	$NetBSD: printk.h,v 1.2 2018/08/27 06:19:05 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LINUX_PRINTK_H_
     33 #define _LINUX_PRINTK_H_
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 
     38 #define	printk		printf
     39 #define	vprintk		vprintf
     40 #define	printk_once	printf
     41 #define	pr_err		printf	/* XXX */
     42 #define	pr_cont		printf	/* XXX */
     43 #define	pr_info		printf	/* XXX */
     44 #define	pr_info_once	printf	/* XXX */
     45 #define	pr_warn_once	printf	/* XXX */
     46 #define	pr_notice	printf	/* XXX */
     47 #define	KERN_DEBUG	"drm kern debug: "
     48 #define	KERN_INFO	"drm kern info: "
     49 #define	KERN_WARNING	"drm kern warning: "
     50 #define	KERN_ERR	"drm kern error: "
     51 #define	KERN_CRIT	"drm kern crit: "
     52 #define	KERN_CONT	""
     53 
     54 #define	DUMP_PREFIX_NONE	0
     55 #define	DUMP_PREFIX_OFFSET	1
     56 #define	DUMP_PREFIX_ADDRESS	2
     57 
     58 static inline void
     59 hex_dump_to_buffer(const void *buf, size_t buf_size, int bytes_per_line,
     60     int bytes_per_group, char *output, size_t output_size, bool ascii __unused)
     61 {
     62 	const uint8_t *bytes = buf;
     63 	size_t i = 0, n;
     64 
     65 	KASSERT(output_size >= 1);
     66 	KASSERT((bytes_per_line == 16) || (bytes_per_line == 32));
     67 	KASSERT(powerof2(bytes_per_group));
     68 	KASSERT(0 < bytes_per_group);
     69 	KASSERT(bytes_per_group <= 8);
     70 
     71 	output[output_size - 1] = '\0';
     72 	while (i < buf_size) {
     73 		n = snprintf(output, output_size, "%02x", bytes[i++]);
     74 		if (n >= output_size)
     75 			break;
     76 		output += n; output_size -= n;
     77 		if ((i == buf_size) || (0 == (i % bytes_per_line)))
     78 			n = snprintf(output, output_size, "\n");
     79 		else if ((0 < i) && (0 == (i % bytes_per_group)))
     80 			n = snprintf(output, output_size, " ");
     81 		else
     82 			n = 0;
     83 		if (n >= output_size)
     84 			break;
     85 		output += n; output_size -= n;
     86 	}
     87 }
     88 
     89 static inline void
     90 print_hex_dump(const char *level, const char *prefix, int prefix_type,
     91     int bytes_per_line, int bytes_per_group, const void *buf, size_t buf_size,
     92     bool ascii)
     93 {
     94 	const uint8_t *bytes = buf;
     95 	/* Two digits and one space/newline per byte, plus a null.  */
     96 	char line[32*3 + 1];
     97 
     98 	KASSERT((bytes_per_line == 16) || (bytes_per_line == 32));
     99 	KASSERT(powerof2(bytes_per_group));
    100 	KASSERT(0 < bytes_per_group);
    101 	KASSERT(bytes_per_group <= 8);
    102 
    103 	while (0 < buf_size) {
    104 		const size_t n = MIN(buf_size, 32);
    105 
    106 		switch (prefix_type) {
    107 		case DUMP_PREFIX_OFFSET:
    108 			printf("%08zu: ", (bytes - (const uint8_t *)buf));
    109 			break;
    110 
    111 		case DUMP_PREFIX_ADDRESS:
    112 			printf("%p: ", bytes);
    113 			break;
    114 
    115 		case DUMP_PREFIX_NONE:
    116 		default:
    117 			break;
    118 		}
    119 
    120 		hex_dump_to_buffer(bytes, n, bytes_per_line, bytes_per_group,
    121 		    line, sizeof(line), ascii);
    122 		KASSERT(0 < strnlen(line, sizeof(line)));
    123 		KASSERT(line[strnlen(line, sizeof(line)) - 1] == '\n');
    124 		printf("%s", line);
    125 
    126 		bytes += n;
    127 		buf_size -= n;
    128 	}
    129 }
    130 
    131 #endif  /* _LINUX_PRINTK_H_ */
    132