u-boot/common/cmd_log.c
Simon Glass 4c12eeb8b5 Convert cmd_usage() calls in common to use a return value
Change all files in common/ to use CMD_RET_USAGE instead of calling
cmd_usage() directly. I'm not completely sure about this patch since
the code since impact is small (100 byte or so on ARM) and it might
need splitting into smaller patches. But for now here it is.

Signed-off-by: Simon Glass <sjg@chromium.org>
2012-03-06 21:09:46 +01:00

317 lines
7.4 KiB
C

/*
* (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.
*
* 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
*
* 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.
*/
/*
* Logbuffer handling routines
*/
#include <common.h>
#include <command.h>
#include <stdio_dev.h>
#include <post.h>
#include <logbuff.h>
DECLARE_GLOBAL_DATA_PTR;
/* 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];
/* This combination will not print messages with the default loglevel */
static unsigned console_loglevel = 3;
static unsigned default_message_loglevel = 4;
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;
#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)
{
struct stdio_dev 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 = stdio_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)
{
logbuff_printk (s);
}
void logbuff_log(char *msg)
{
if ((gd->flags & GD_FLG_LOGINIT)) {
logbuff_printk (msg);
} else {
/* Can happen only for pre-relocated errors as logging */
/* at that stage should be disabled */
puts (msg);
}
}
/*
* 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 * const argv[])
{
char *s;
unsigned long i, start, size;
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) {
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 = lbuf+((start+i)&LOGBUFF_MASK);
putc (*s);
}
return 0;
} else if (strcmp(argv[1],"reset") == 0) {
logbuff_reset ();
return 0;
} 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 ("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;
}
return CMD_RET_USAGE;
default:
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;
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++) {
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;
}
}
if (msg_level < console_loglevel) {
printf("%s", msg);
}
if (line_feed)
msg_level = -1;
}
return i;
}