/*
- * (C) Copyright 2002
+ * (C) Copyright 2002-2007
* 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.
*
* 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.
*/
/*
#include <common.h>
#include <command.h>
-#include <devices.h>
+#include <stdio_dev.h>
+#include <post.h>
#include <logbuff.h>
-#if defined(CONFIG_LOGBUFFER)
-
-#define LOG_BUF_LEN (16384)
-#define LOG_BUF_MASK (LOG_BUF_LEN-1)
+DECLARE_GLOBAL_DATA_PTR;
/* Local prototypes */
-static void logbuff_putc (const char c);
-static void logbuff_puts (const char *s);
+static void logbuff_putc(const char c);
+static void logbuff_puts(const char *s);
static int logbuff_printk(const char *line);
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;
-#define log_start (*ext_log_start)
-#define logged_chars (*ext_logged_chars)
+static unsigned log_version = 1;
+#ifdef CONFIG_ALT_LB_ADDR
+static volatile logbuff_t *log;
+#else
+static logbuff_t *log;
+#endif
+static char *lbuf;
+
+unsigned long __logbuffer_base(void)
+{
+ return CONFIG_SYS_SDRAM_BASE + gd->ram_size - LOGBUFF_LEN;
+}
+unsigned long logbuffer_base(void)
+__attribute__((weak, alias("__logbuffer_base")));
+
+void logbuff_init_ptrs(void)
+{
+ unsigned long tag, post_word;
+ char *s;
-/* Forced by code, eh! */
-#define LOGBUFF_MAGIC 0xc0de4ced
+#ifdef CONFIG_ALT_LB_ADDR
+ log = (logbuff_t *)CONFIG_ALT_LH_ADDR;
+ lbuf = (char *)CONFIG_ALT_LB_ADDR;
+#else
+ log = (logbuff_t *)(logbuffer_base()) - 1;
+ lbuf = (char *)log->buf;
+#endif
+
+ /* 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 (tag != LOGBUFF_MAGIC || (post_word & POST_COLDBOOT))
+ logbuff_reset();
+#else
+ /* No post routines, so we do our own checking */
+ if (tag != LOGBUFF_MAGIC || post_word != LOGBUFF_MAGIC) {
+ logbuff_reset ();
+ post_word_store (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);
+
+ gd->flags |= GD_FLG_LOGINIT;
+}
+
+void logbuff_reset(void)
+{
+#ifndef CONFIG_ALT_LB_ADDR
+ memset(log, 0, sizeof(logbuff_t));
+#endif
+ if (log_version == 2) {
+ log->v2.tag = LOGBUFF_MAGIC;
+#ifdef CONFIG_ALT_LB_ADDR
+ log->v2.start = 0;
+ log->v2.con = 0;
+ log->v2.end = 0;
+ log->v2.chars = 0;
+#endif
+ } else {
+ log->v1.tag = LOGBUFF_MAGIC;
+#ifdef CONFIG_ALT_LB_ADDR
+ log->v1.dummy = 0;
+ log->v1.start = 0;
+ log->v1.size = 0;
+ log->v1.chars = 0;
+#endif
+ }
+}
-int drv_logbuff_init (void)
+int drv_logbuff_init(void)
{
- device_t logdev;
+ struct stdio_dev logdev;
int rc;
/* Device initialization */
logdev.putc = logbuff_putc; /* 'putc' function */
logdev.puts = logbuff_puts; /* 'puts' function */
- rc = device_register (&logdev);
+ rc = stdio_register(&logdev);
return (rc == 0) ? 1 : rc;
}
-static void logbuff_putc (const char c)
+static void logbuff_putc(const char c)
{
char buf[2];
- buf[0]=c;
- buf[1]='\0';
+ buf[0] = c;
+ buf[1] = '\0';
logbuff_printk(buf);
}
-static void logbuff_puts (const char *s)
+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) {
+ if ((gd->flags & GD_FLG_LOGINIT)) {
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);
}
}
* Return: None
*
*/
-int do_log (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+int do_log(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
char *s;
- unsigned long i;
+ unsigned long i, start, size;
- 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++) {
+ logbuff_printk(argv[i]);
+ logbuff_putc((i < argc - 1) ? ' ' : '\n');
+ }
+ 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);
+ if (strcmp(argv[1], "show") == 0) {
+ if (log_version == 2) {
+ start = log->v2.start;
+ size = log->v2.end - log->v2.start;
+ } else {
+ start = log->v1.start;
+ size = log->v1.size;
+ }
+ if (size > LOGBUFF_LEN)
+ size = LOGBUFF_LEN;
+ for (i = 0; i < size; i++) {
+ s = lbuf + ((start + i) & LOGBUFF_MASK);
putc(*s);
}
return 0;
- } else if (strcmp(argv[1],"reset") == 0) {
- log_start=0;
- logged_chars=0;
- log_size=0;
+ } else if (strcmp(argv[1], "reset") == 0) {
+ logbuff_reset();
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)lbuf);
+ if (log_version == 2) {
+ printf("log_start = %08lx\n",
+ log->v2.start);
+ printf("log_end = %08lx\n", log->v2.end);
+ printf("log_con = %08lx\n", log->v2.con);
+ 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);
- return 1;
+ return CMD_RET_USAGE;
default:
- printf ("Usage:\n%s\n", cmdtp->usage);
- return 1;
+ return CMD_RET_USAGE;
}
}
+U_BOOT_CMD(
+ log, 255, 1, do_log,
+ "manipulate logbuffer",
+ "info - show pointer details\n"
+ "log reset - clear contents\n"
+ "log show - show contents\n"
+ "log append <msg> - append <msg> to the logbuffer"
+);
+
static int logbuff_printk(const char *line)
{
int i;
p[0] = '<';
p[1] = default_message_loglevel + '0';
p[2] = '>';
- } else
+ } else {
msg += 3;
+ }
msg_level = p[1] - '0';
}
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_size++;
- else
- log_start++;
-
- logged_chars++;
+ if (log_version == 2) {
+ lbuf[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 {
+ lbuf[(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;
}
return i;
}
-
-#endif /* (CONFIG_LOGBUFFER) */
projects / karo-tx-uboot.git / blobdiff