source: mainline/arch/ppc32/loader/printf.c@ 75a3095

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 75a3095 was 3c1dec0, checked in by Martin Decky <martin@…>, 19 years ago

move ppc32 boot loader to /boot tree
  • Property mode set to 100644
File size: 5.8 KB
Line 
1/*
2 * Copyright (C) 2006 Martin Decky
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "printf.h"
30#include "ofw.h"
31
32static char digits[] = "0123456789abcdef"; /**< Hexadecimal characters */
33
34
35/** Print hexadecimal digits
36 *
37 * Print fixed count of hexadecimal digits from
38 * the number num. The digits are printed in
39 * natural left-to-right order starting with
40 * the width-th digit.
41 *
42 * @param num Number containing digits.
43 * @param width Count of digits to print.
44 *
45 */
46static void print_fixed_hex(const __u64 num, const int width)
47{
48 int i;
49
50 for (i = width * 8 - 4; i >= 0; i -= 4)
51 ofw_write(digits + ((num >> i) & 0xf), 1);
52}
53
54
55/** Print number in given base
56 *
57 * Print significant digits of a number in given
58 * base.
59 *
60 * @param num Number to print.
61 * @param base Base to print the number in (should
62 * be in range 2 .. 16).
63 *
64 */
65static void print_number(const __native num, const unsigned int base)
66{
67 int val = num;
68 char d[sizeof(__native) * 8 + 1]; /* this is good enough even for base == 2 */
69 int i = sizeof(__native) * 8 - 1;
70
71 do {
72 d[i--] = digits[val % base];
73 } while (val /= base);
74
75 d[sizeof(__native) * 8] = 0;
76 ofw_puts(&d[i + 1]);
77}
78
79
80/** General formatted text print
81 *
82 * Print text formatted according the fmt parameter
83 * and variant arguments. Each formatting directive
84 * begins with \% (percentage) character and one of the
85 * following character:
86 *
87 * \% Prints the percentage character.
88 *
89 * s The next variant argument is treated as char*
90 * and printed as a NULL terminated string.
91 *
92 * c The next variant argument is treated as a single char.
93 *
94 * p The next variant argument is treated as a maximum
95 * bit-width integer with respect to architecture
96 * and printed in full hexadecimal width.
97 *
98 * P As with 'p', but '0x' is prefixed.
99 *
100 * q The next variant argument is treated as a 64b integer
101 * and printed in full hexadecimal width.
102 *
103 * Q As with 'q', but '0x' is prefixed.
104 *
105 * l The next variant argument is treated as a 32b integer
106 * and printed in full hexadecimal width.
107 *
108 * L As with 'l', but '0x' is prefixed.
109 *
110 * w The next variant argument is treated as a 16b integer
111 * and printed in full hexadecimal width.
112 *
113 * W As with 'w', but '0x' is prefixed.
114 *
115 * b The next variant argument is treated as a 8b integer
116 * and printed in full hexadecimal width.
117 *
118 * B As with 'b', but '0x' is prefixed.
119 *
120 * d The next variant argument is treated as integer
121 * and printed in standard decimal format (only significant
122 * digits).
123 *
124 * x The next variant argument is treated as integer
125 * and printed in standard hexadecimal format (only significant
126 * digits).
127 *
128 * X As with 'x', but '0x' is prefixed.
129 *
130 * All other characters from fmt except the formatting directives
131 * are printed in verbatim.
132 *
133 * @param fmt Formatting NULL terminated string.
134 */
135void printf(const char *fmt, ...)
136{
137 int i = 0;
138 va_list ap;
139 char c;
140
141 va_start(ap, fmt);
142
143 while ((c = fmt[i++])) {
144 switch (c) {
145
146 /* control character */
147 case '%':
148
149 switch (c = fmt[i++]) {
150
151 /* percentile itself */
152 case '%':
153 break;
154
155 /*
156 * String and character conversions.
157 */
158 case 's':
159 ofw_puts(va_arg(ap, char_ptr));
160 goto loop;
161
162 case 'c':
163 c = (char) va_arg(ap, int);
164 break;
165
166 /*
167 * Hexadecimal conversions with fixed width.
168 */
169 case 'P':
170 ofw_puts("0x");
171 case 'p':
172 print_fixed_hex(va_arg(ap, __native), sizeof(__native));
173 goto loop;
174
175 case 'Q':
176 ofw_puts("0x");
177 case 'q':
178 print_fixed_hex(va_arg(ap, __u64), INT64);
179 goto loop;
180
181 case 'L':
182 ofw_puts("0x");
183 case 'l':
184 print_fixed_hex(va_arg(ap, __native), INT32);
185 goto loop;
186
187 case 'W':
188 ofw_puts("0x");
189 case 'w':
190 print_fixed_hex(va_arg(ap, __native), INT16);
191 goto loop;
192
193 case 'B':
194 ofw_puts("0x");
195 case 'b':
196 print_fixed_hex(va_arg(ap, __native), INT8);
197 goto loop;
198
199 /*
200 * Decimal and hexadecimal conversions.
201 */
202 case 'd':
203 print_number(va_arg(ap, __native), 10);
204 goto loop;
205
206 case 'X':
207 ofw_puts("0x");
208 case 'x':
209 print_number(va_arg(ap, __native), 16);
210 goto loop;
211
212 /*
213 * Bad formatting.
214 */
215 default:
216 goto out;
217 }
218
219 default:
220 ofw_write(&c, 1);
221 }
222
223loop:
224 ;
225 }
226
227out:
228
229 va_end(ap);
230}
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