mirror of
https://xff.cz/git/u-boot/
synced 2025-10-31 10:26:10 +01:00
Adapt log buffer code to support Linux 2.6
A new environment variable, "logversion", selects the log buffer behaviour. If it is not set or set to a value other than 2, then the old, Linux 2.4.4, behaviour is selected. Signed-off-by: Igor Lisitsin <igor@emcraft.com> --
This commit is contained in:
Igor Lisitsin
committed by
Wolfgang Denk
Wolfgang Denk
parent
a11e06965e
commit
2dc64451b4
114
common/cmd_log.c
114
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++;
|
||||
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_start++;
|
||||
|
||||
logged_chars++;
|
||||
log->v1.start++;
|
||||
log->v1.chars++;
|
||||
}
|
||||
if (*p == '\n') {
|
||||
line_feed = 1;
|
||||
break;
|
||||
|
||||
@@ -1,5 +1,5 @@
|
||||
/*
|
||||
* (C) Copyright 2002
|
||||
* (C) Copyright 2002-2007
|
||||
* Detlev Zundel, dzu@denx.de.
|
||||
*
|
||||
* See file CREDITS for list of people who contributed to this
|
||||
@@ -25,6 +25,7 @@
|
||||
|
||||
#ifdef CONFIG_LOGBUFFER
|
||||
|
||||
#define LOGBUFF_MAGIC 0xc0de4ced /* Forced by code, eh! */
|
||||
#define LOGBUFF_LEN (16384) /* Must be 16k right now */
|
||||
#define LOGBUFF_MASK (LOGBUFF_LEN-1)
|
||||
#define LOGBUFF_OVERHEAD (4096) /* Logbuffer overhead for extra info */
|
||||
@@ -32,6 +33,29 @@
|
||||
|
||||
#define LOGBUFF_INITIALIZED (1<<31)
|
||||
|
||||
/* The mapping used here has to be the same as in setup_ext_logbuff ()
|
||||
in linux/kernel/printk */
|
||||
|
||||
typedef struct {
|
||||
union {
|
||||
struct {
|
||||
unsigned long tag;
|
||||
unsigned long start;
|
||||
unsigned long con;
|
||||
unsigned long end;
|
||||
unsigned long chars;
|
||||
} v2;
|
||||
struct {
|
||||
unsigned long dummy;
|
||||
unsigned long tag;
|
||||
unsigned long start;
|
||||
unsigned long size;
|
||||
unsigned long chars;
|
||||
} v1;
|
||||
};
|
||||
unsigned char buf[0];
|
||||
} logbuff_t;
|
||||
|
||||
int drv_logbuff_init (void);
|
||||
void logbuff_init_ptrs (void);
|
||||
void logbuff_log(char *msg);
|
||||
|
||||
Reference in New Issue
Block a user