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27#include <common.h>
28#include <command.h>
29#include <stdio_dev.h>
30#include <post.h>
31#include <logbuff.h>
32
33DECLARE_GLOBAL_DATA_PTR;
34
35
36static void logbuff_putc(struct stdio_dev *dev, const char c);
37static void logbuff_puts(struct stdio_dev *dev, const char *s);
38static int logbuff_printk(const char *line);
39
40static char buf[1024];
41
42
43static unsigned console_loglevel = 3;
44static unsigned default_message_loglevel = 4;
45static unsigned log_version = 1;
46#ifdef CONFIG_ALT_LB_ADDR
47static volatile logbuff_t *log;
48#else
49static logbuff_t *log;
50#endif
51static char *lbuf;
52
53unsigned long __logbuffer_base(void)
54{
55 return CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - LOGBUFF_LEN;
56}
57unsigned long logbuffer_base(void)
58__attribute__((weak, alias("__logbuffer_base")));
59
60void logbuff_init_ptrs(void)
61{
62 unsigned long tag, post_word;
63 char *s;
64
65#ifdef CONFIG_ALT_LB_ADDR
66 log = (logbuff_t *)CONFIG_ALT_LH_ADDR;
67 lbuf = (char *)CONFIG_ALT_LB_ADDR;
68#else
69 log = (logbuff_t *)(logbuffer_base()) - 1;
70 lbuf = (char *)log->buf;
71#endif
72
73
74 if ((s = getenv ("logversion")) != NULL)
75 log_version = (int)simple_strtoul(s, NULL, 10);
76
77 if (log_version == 2)
78 tag = log->v2.tag;
79 else
80 tag = log->v1.tag;
81 post_word = post_word_load();
82#ifdef CONFIG_POST
83
84 if (tag != LOGBUFF_MAGIC || (post_word & POST_COLDBOOT))
85 logbuff_reset();
86#else
87
88 if (tag != LOGBUFF_MAGIC || post_word != LOGBUFF_MAGIC) {
89 logbuff_reset ();
90 post_word_store (LOGBUFF_MAGIC);
91 }
92#endif
93 if (log_version == 2 && (long)log->v2.start > (long)log->v2.con)
94 log->v2.start = log->v2.con;
95
96
97 if ((s = getenv ("loglevel")) != NULL)
98 console_loglevel = (int)simple_strtoul(s, NULL, 10);
99
100 gd->flags |= GD_FLG_LOGINIT;
101}
102
103void logbuff_reset(void)
104{
105#ifndef CONFIG_ALT_LB_ADDR
106 memset(log, 0, sizeof(logbuff_t));
107#endif
108 if (log_version == 2) {
109 log->v2.tag = LOGBUFF_MAGIC;
110#ifdef CONFIG_ALT_LB_ADDR
111 log->v2.start = 0;
112 log->v2.con = 0;
113 log->v2.end = 0;
114 log->v2.chars = 0;
115#endif
116 } else {
117 log->v1.tag = LOGBUFF_MAGIC;
118#ifdef CONFIG_ALT_LB_ADDR
119 log->v1.dummy = 0;
120 log->v1.start = 0;
121 log->v1.size = 0;
122 log->v1.chars = 0;
123#endif
124 }
125}
126
127int drv_logbuff_init(void)
128{
129 struct stdio_dev logdev;
130 int rc;
131
132
133 memset (&logdev, 0, sizeof (logdev));
134
135 strcpy (logdev.name, "logbuff");
136 logdev.ext = 0;
137 logdev.flags = DEV_FLAGS_OUTPUT;
138 logdev.putc = logbuff_putc;
139 logdev.puts = logbuff_puts;
140
141 rc = stdio_register(&logdev);
142
143 return (rc == 0) ? 1 : rc;
144}
145
146static void logbuff_putc(struct stdio_dev *dev, const char c)
147{
148 char buf[2];
149 buf[0] = c;
150 buf[1] = '\0';
151 logbuff_printk(buf);
152}
153
154static void logbuff_puts(struct stdio_dev *dev, const char *s)
155{
156 logbuff_printk (s);
157}
158
159void logbuff_log(char *msg)
160{
161 if ((gd->flags & GD_FLG_LOGINIT)) {
162 logbuff_printk(msg);
163 } else {
164
165
166
167
168 puts (msg);
169 }
170}
171
172
173
174
175
176
177
178
179
180
181
182int do_log(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
183{
184 struct stdio_dev *sdev = NULL;
185 char *s;
186 unsigned long i, start, size;
187
188 if (strcmp(argv[1], "append") == 0) {
189
190 for (i = 2; i < argc; i++) {
191 logbuff_printk(argv[i]);
192 logbuff_putc(sdev, (i < argc - 1) ? ' ' : '\n');
193 }
194 return 0;
195 }
196
197 switch (argc) {
198
199 case 2:
200 if (strcmp(argv[1], "show") == 0) {
201 if (log_version == 2) {
202 start = log->v2.start;
203 size = log->v2.end - log->v2.start;
204 } else {
205 start = log->v1.start;
206 size = log->v1.size;
207 }
208 if (size > LOGBUFF_LEN)
209 size = LOGBUFF_LEN;
210 for (i = 0; i < size; i++) {
211 s = lbuf + ((start + i) & LOGBUFF_MASK);
212 putc(*s);
213 }
214 return 0;
215 } else if (strcmp(argv[1], "reset") == 0) {
216 logbuff_reset();
217 return 0;
218 } else if (strcmp(argv[1], "info") == 0) {
219 printf("Logbuffer at %08lx\n", (unsigned long)lbuf);
220 if (log_version == 2) {
221 printf("log_start = %08lx\n",
222 log->v2.start);
223 printf("log_end = %08lx\n", log->v2.end);
224 printf("log_con = %08lx\n", log->v2.con);
225 printf("logged_chars = %08lx\n",
226 log->v2.chars);
227 }
228 else {
229 printf("log_start = %08lx\n",
230 log->v1.start);
231 printf("log_size = %08lx\n",
232 log->v1.size);
233 printf("logged_chars = %08lx\n",
234 log->v1.chars);
235 }
236 return 0;
237 }
238 return CMD_RET_USAGE;
239
240 default:
241 return CMD_RET_USAGE;
242 }
243}
244
245U_BOOT_CMD(
246 log, 255, 1, do_log,
247 "manipulate logbuffer",
248 "info - show pointer details\n"
249 "log reset - clear contents\n"
250 "log show - show contents\n"
251 "log append <msg> - append <msg> to the logbuffer"
252);
253
254static int logbuff_printk(const char *line)
255{
256 int i;
257 char *msg, *p, *buf_end;
258 int line_feed;
259 static signed char msg_level = -1;
260
261 strcpy(buf + 3, line);
262 i = strlen(line);
263 buf_end = buf + 3 + i;
264 for (p = buf + 3; p < buf_end; p++) {
265 msg = p;
266 if (msg_level < 0) {
267 if (
268 p[0] != '<' ||
269 p[1] < '0' ||
270 p[1] > '7' ||
271 p[2] != '>'
272 ) {
273 p -= 3;
274 p[0] = '<';
275 p[1] = default_message_loglevel + '0';
276 p[2] = '>';
277 } else {
278 msg += 3;
279 }
280 msg_level = p[1] - '0';
281 }
282 line_feed = 0;
283 for (; p < buf_end; p++) {
284 if (log_version == 2) {
285 lbuf[log->v2.end & LOGBUFF_MASK] = *p;
286 log->v2.end++;
287 if (log->v2.end - log->v2.start > LOGBUFF_LEN)
288 log->v2.start++;
289 log->v2.chars++;
290 } else {
291 lbuf[(log->v1.start + log->v1.size) &
292 LOGBUFF_MASK] = *p;
293 if (log->v1.size < LOGBUFF_LEN)
294 log->v1.size++;
295 else
296 log->v1.start++;
297 log->v1.chars++;
298 }
299 if (*p == '\n') {
300 line_feed = 1;
301 break;
302 }
303 }
304 if (msg_level < console_loglevel) {
305 printf("%s", msg);
306 }
307 if (line_feed)
308 msg_level = -1;
309 }
310 return i;
311}
312