* Improve log buffer code; use "loglevel" to decide which messages
to log on the console, too (like in Linux); get rid of "logstart"
diff --git a/common/cmd_log.c b/common/cmd_log.c
index 1748aa6..84306ef 100644
--- a/common/cmd_log.c
+++ b/common/cmd_log.c
@@ -2,6 +2,9 @@
* (C) Copyright 2002
* Detlev Zundel, DENX Software Engineering, dzu@denx.de.
*
+ * Code used from linux/kernel/printk.c
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
@@ -19,6 +22,18 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
+ *
+ * Comments:
+ *
+ * After relocating the code, the environment variable "loglevel" is
+ * copied to console_loglevel. The functionality is similar to the
+ * handling in the Linux kernel, i.e. messages logged with a priority
+ * less than console_loglevel are also output to stdout.
+ *
+ * If you want messages with the default level (e.g. POST messages) to
+ * appear on stdout also, make sure the environment variable
+ * "loglevel" is set at boot time to a number higher than
+ * default_message_loglevel below.
*/
/*
@@ -28,13 +43,11 @@
#include <common.h>
#include <command.h>
#include <devices.h>
+#include <post.h>
#include <logbuff.h>
#if defined(CONFIG_LOGBUFFER)
-#define LOG_BUF_LEN (16384)
-#define LOG_BUF_MASK (LOG_BUF_LEN-1)
-
/* Local prototypes */
static void logbuff_putc (const char c);
static void logbuff_puts (const char *s);
@@ -42,17 +55,44 @@
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 long log_size;
-static unsigned char *log_buf=NULL;
-static unsigned long *ext_log_start, *ext_logged_chars;
+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)
/* 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)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+ unsigned long *ext_tag;
+ 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;
+ if (*ext_tag!=LOGBUFF_MAGIC) {
+ logged_chars = log_size = log_start = 0;
+ *ext_tag = LOGBUFF_MAGIC;
+ }
+ /* Initialize default loglevel if present */
+ if ((s = getenv ("loglevel")) != NULL)
+ console_loglevel = (int)simple_strtoul (s, NULL, 10);
+
+ gd->post_log_word |= LOGBUFF_INITIALIZED;
+}
+
int drv_logbuff_init (void)
{
device_t logdev;
@@ -75,45 +115,26 @@
static void logbuff_putc (const char c)
{
char buf[2];
- buf[0]=c;
- buf[1]='\0';
- logbuff_printk(buf);
+ buf[0] = c;
+ buf[1] = '\0';
+ logbuff_printk (buf);
}
static void logbuff_puts (const char *s)
{
- char buf[512];
-
- sprintf(buf, "%s\n", s);
- logbuff_printk(buf);
+ logbuff_printk (s);
}
void logbuff_log(char *msg)
{
DECLARE_GLOBAL_DATA_PTR;
- if ((gd->flags & GD_FLG_RELOC)&&(getenv ("logstart") != NULL)) {
- logbuff_printk(msg);
+ if ((gd->post_log_word & LOGBUFF_INITIALIZED)) {
+ logbuff_printk (msg);
} else {
- puts(msg);
- }
-}
-
-void logbuff_reset (void)
-{
- char *s;
- unsigned long *ext_tag;
-
- if ((s = getenv ("logstart")) != NULL) {
- log_buf = (unsigned char *)simple_strtoul(s, NULL, 16);
- ext_tag=(unsigned long *)(log_buf)-3;
- ext_log_start=(unsigned long *)(log_buf)-2;
- ext_logged_chars=(unsigned long *)(log_buf)-1;
-/* if (*ext_tag!=LOGBUFF_MAGIC) { */
- logged_chars=log_start=0;
- *ext_tag=LOGBUFF_MAGIC;
-/* } */
- log_size=logged_chars;
+ /* Can happen only for pre-relocated errors as logging */
+ /* at that stage should be disabled */
+ puts (msg);
}
}
@@ -132,34 +153,39 @@
char *s;
unsigned long i;
- if (log_buf==NULL) {
- printf ("No logbuffer defined! Set 'logstart' to use this feature.\n");
- return 1;
+ if (strcmp(argv[1],"append") == 0) {
+ /* Log concatenation of all arguments separated by spaces */
+ for (i=2; i<argc; i++) {
+ if (i<argc-1) {
+ logbuff_printk (argv[i]);
+ logbuff_putc (' ');
+ } else {
+ logbuff_puts (argv[i]);
+ }
+ }
+ return 0;
}
switch (argc) {
case 2:
if (strcmp(argv[1],"show") == 0) {
- for (i=0; i<logged_chars; i++) {
- s=log_buf+((log_start+i)&LOG_BUF_MASK);
- putc(*s);
+ for (i=0; i < (log_size&LOGBUFF_MASK); i++) {
+ s = log_buf+((log_start+i)&LOGBUFF_MASK);
+ putc (*s);
}
return 0;
} else if (strcmp(argv[1],"reset") == 0) {
- log_start=0;
- logged_chars=0;
- log_size=0;
+ log_start = 0;
+ log_size = 0;
+ logged_chars = 0;
return 0;
- }
- printf ("Usage:\n%s\n", cmdtp->usage);
- return 1;
-
- case 3:
- if (strcmp(argv[1],"append") == 0) {
- logbuff_puts(argv[2]);
+ } 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);
return 0;
-
}
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
@@ -177,8 +203,8 @@
int line_feed;
static signed char msg_level = -1;
- strcpy(buf + 3, line);
- i = strlen(line);
+ strcpy (buf + 3, line);
+ i = strlen (line);
buf_end = buf + 3 + i;
for (p = buf + 3; p < buf_end; p++) {
msg = p;
@@ -199,8 +225,8 @@
}
line_feed = 0;
for (; p < buf_end; p++) {
- log_buf[(log_start+log_size) & LOG_BUF_MASK] = *p;
- if (log_size < LOG_BUF_LEN)
+ log_buf[(log_start+log_size) & LOGBUFF_MASK] = *p;
+ if (log_size < LOGBUFF_LEN)
log_size++;
else
log_start++;