* Add support for log buffer which can be passed to Linux kernel's
syslog mechanism; used especially for POST results.
* Patch by Klaus Heydeck, 31 Oct 2002:
Add initial support for kup4k board
diff --git a/common/cmd_log.c b/common/cmd_log.c
new file mode 100644
index 0000000..2e42f10
--- /dev/null
+++ b/common/cmd_log.c
@@ -0,0 +1,223 @@
+/*
+ * (C) Copyright 2002
+ * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * Logbuffer handling routines
+ */
+
+#include <common.h>
+#include <command.h>
+#include <devices.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);
+static int logbuff_printk(const char *line);
+
+static char buf[1024];
+
+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)
+
+/* Forced by code, eh! */
+#define LOGBUFF_MAGIC 0xc0de4ced
+
+int drv_logbuff_init (void)
+{
+ device_t logdev;
+ int rc;
+
+ /* Device initialization */
+ memset (&logdev, 0, sizeof (logdev));
+
+ strcpy (logdev.name, "logbuff");
+ logdev.ext = 0; /* No extensions */
+ logdev.flags = DEV_FLAGS_OUTPUT; /* Output only */
+ logdev.putc = logbuff_putc; /* 'putc' function */
+ logdev.puts = logbuff_puts; /* 'puts' function */
+
+ rc = device_register (&logdev);
+
+ return (rc == 0) ? 1 : rc;
+}
+
+static void logbuff_putc (const char c)
+{
+ char buf[2];
+ 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);
+}
+
+void logbuff_log(char *msg)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ if (gd->flags & GD_FLG_RELOC) {
+ 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;
+ }
+}
+
+/*
+ * Subroutine: do_log
+ *
+ * Description: Handler for 'log' command..
+ *
+ * Inputs: argv[1] contains the subcommand
+ *
+ * Return: None
+ *
+ */
+int do_log (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ char *s;
+ unsigned long i;
+
+ if (log_buf==NULL) {
+ printf ("No logbuffer defined! Set 'logstart' to use this feature.\n");
+ return 1;
+ }
+
+ 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);
+ }
+ return 0;
+ } else if (strcmp(argv[1],"reset") == 0) {
+ log_start=0;
+ logged_chars=0;
+ log_size=0;
+ return 0;
+ }
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+
+ case 3:
+ if (strcmp(argv[1],"append") == 0) {
+ logbuff_puts(argv[2]);
+ return 0;
+
+ }
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+
+ default:
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+}
+
+static int logbuff_printk(const char *line)
+{
+ int i;
+ char *msg, *p, *buf_end;
+ int line_feed;
+ static signed char msg_level = -1;
+
+ strcpy(buf + 3, line);
+ i = strlen(line);
+ buf_end = buf + 3 + i;
+ for (p = buf + 3; p < buf_end; p++) {
+ msg = p;
+ if (msg_level < 0) {
+ if (
+ p[0] != '<' ||
+ p[1] < '0' ||
+ p[1] > '7' ||
+ p[2] != '>'
+ ) {
+ p -= 3;
+ p[0] = '<';
+ p[1] = default_message_loglevel + '0';
+ p[2] = '>';
+ } 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 (*p == '\n') {
+ line_feed = 1;
+ break;
+ }
+ }
+ if (msg_level < console_loglevel) {
+ printf("%s", msg);
+ }
+ if (line_feed)
+ msg_level = -1;
+ }
+ return i;
+}
+
+#endif /* (CONFIG_LOGBUFFER) */
