diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/cmd_log.c | 116 |
1 files changed, 71 insertions, 45 deletions
diff --git a/common/cmd_log.c b/common/cmd_log.c index 042a403..5bf811e 100644 --- a/common/cmd_log.c +++ b/common/cmd_log.c @@ -1,5 +1,5 @@ /* - * (C) Copyright 2002 + * (C) Copyright 2002-2007 * Detlev Zundel, DENX Software Engineering, dzu@denx.de. * * Code used from linux/kernel/printk.c @@ -60,45 +60,40 @@ static char buf[1024]; /* This combination will not print messages with the default loglevel */ static unsigned console_loglevel = 3; static unsigned default_message_loglevel = 4; -static unsigned char *log_buf = NULL; -static unsigned long *ext_log_size; -static unsigned long *ext_log_start; -static unsigned long *ext_logged_chars; -#define log_size (*ext_log_size) -#define log_start (*ext_log_start) -#define logged_chars (*ext_logged_chars) +static unsigned log_version = 1; +static logbuff_t *log; -/* Forced by code, eh! */ -#define LOGBUFF_MAGIC 0xc0de4ced - -/* The mapping used here has to be the same as in setup_ext_logbuff () - in linux/kernel/printk */ void logbuff_init_ptrs (void) { - unsigned long *ext_tag; - unsigned long post_word; + unsigned long tag, post_word; char *s; - log_buf = (unsigned char *)(gd->bd->bi_memsize-LOGBUFF_LEN); - ext_tag = (unsigned long *)(log_buf)-4; - ext_log_start = (unsigned long *)(log_buf)-3; - ext_log_size = (unsigned long *)(log_buf)-2; - ext_logged_chars = (unsigned long *)(log_buf)-1; + log = (logbuff_t *)(gd->bd->bi_memsize-LOGBUFF_LEN) - 1; + + /* Set up log version */ + if ((s = getenv ("logversion")) != NULL) + log_version = (int)simple_strtoul (s, NULL, 10); + + if (log_version == 2) + tag = log->v2.tag; + else + tag = log->v1.tag; post_word = post_word_load(); #ifdef CONFIG_POST /* The post routines have setup the word so we can simply test it */ - if (post_word_load () & POST_COLDBOOT) { - logged_chars = log_size = log_start = 0; - *ext_tag = LOGBUFF_MAGIC; + if (tag != LOGBUFF_MAGIC || (post_word & POST_COLDBOOT)) { + logbuff_reset (); } #else /* No post routines, so we do our own checking */ - if (post_word != LOGBUFF_MAGIC) { - logged_chars = log_size = log_start = 0; + if (tag != LOGBUFF_MAGIC || post_word != LOGBUFF_MAGIC) { + logbuff_reset (); post_word_store (LOGBUFF_MAGIC); - *ext_tag = LOGBUFF_MAGIC; } #endif + if (log_version == 2 && (long)log->v2.start > (long)log->v2.con) + log->v2.start = log->v2.con; + /* Initialize default loglevel if present */ if ((s = getenv ("loglevel")) != NULL) console_loglevel = (int)simple_strtoul (s, NULL, 10); @@ -106,6 +101,15 @@ void logbuff_init_ptrs (void) gd->post_log_word |= LOGBUFF_INITIALIZED; } +void logbuff_reset (void) +{ + memset (log, 0, sizeof (logbuff_t)); + if (log_version == 2) + log->v2.tag = LOGBUFF_MAGIC; + else + log->v1.tag = LOGBUFF_MAGIC; +} + int drv_logbuff_init (void) { device_t logdev; @@ -162,7 +166,7 @@ void logbuff_log(char *msg) int do_log (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { char *s; - unsigned long i; + unsigned long i, start, size; if (strcmp(argv[1],"append") == 0) { /* Log concatenation of all arguments separated by spaces */ @@ -177,21 +181,34 @@ int do_log (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) case 2: if (strcmp(argv[1],"show") == 0) { - for (i=0; i < (log_size&LOGBUFF_MASK); i++) { - s = (char *)log_buf+((log_start+i)&LOGBUFF_MASK); + if (log_version == 2) { + start = log->v2.start; + size = log->v2.end - log->v2.start; + } + else { + start = log->v1.start; + size = log->v1.size; + } + for (i=0; i < (size&LOGBUFF_MASK); i++) { + s = (char *)log->buf+((start+i)&LOGBUFF_MASK); putc (*s); } return 0; } else if (strcmp(argv[1],"reset") == 0) { - log_start = 0; - log_size = 0; - logged_chars = 0; + logbuff_reset (); return 0; } else if (strcmp(argv[1],"info") == 0) { - printf ("Logbuffer at %08lx\n", (unsigned long)log_buf); - printf ("log_start = %08lx\n", log_start); - printf ("log_size = %08lx\n", log_size); - printf ("logged_chars = %08lx\n", logged_chars); + printf ("Logbuffer at %08lx\n", (unsigned long)log->buf); + if (log_version == 2) { + printf ("log_start = %08lx\n", log->v2.start); + printf ("log_end = %08lx\n", log->v2.end); + printf ("logged_chars = %08lx\n", log->v2.chars); + } + else { + printf ("log_start = %08lx\n", log->v1.start); + printf ("log_size = %08lx\n", log->v1.size); + printf ("logged_chars = %08lx\n", log->v1.chars); + } return 0; } printf ("Usage:\n%s\n", cmdtp->usage); @@ -202,7 +219,7 @@ int do_log (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return 1; } } -#if defined(CONFIG_LOGBUFFER) + U_BOOT_CMD( log, 255, 1, do_log, "log - manipulate logbuffer\n", @@ -211,7 +228,7 @@ U_BOOT_CMD( "log show - show contents\n" "log append <msg> - append <msg> to the logbuffer\n" ); -#endif /* CONFIG_LOGBUFFER */ + static int logbuff_printk(const char *line) { int i; @@ -241,13 +258,22 @@ static int logbuff_printk(const char *line) } line_feed = 0; for (; p < buf_end; p++) { - log_buf[(log_start+log_size) & LOGBUFF_MASK] = *p; - if (log_size < LOGBUFF_LEN) - log_size++; - else - log_start++; - - logged_chars++; + if (log_version == 2) { + log->buf[log->v2.end & LOGBUFF_MASK] = *p; + log->v2.end++; + if (log->v2.end - log->v2.start > LOGBUFF_LEN) + log->v2.start++; + log->v2.chars++; + } + else { + log->buf[(log->v1.start + log->v1.size) & + LOGBUFF_MASK] = *p; + if (log->v1.size < LOGBUFF_LEN) + log->v1.size++; + else + log->v1.start++; + log->v1.chars++; + } if (*p == '\n') { line_feed = 1; break; |