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// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
/*
* Console Log routines
* Wraps libc and console lower level functions
* does fancy-schmancy things like timestamps and priorities
* Doesn't make waffles.
*
* Copyright 2013-2018 IBM Corp.
*/
#include "skiboot.h"
#include "unistd.h"
#include "stdio.h"
#include "console.h"
#include "timebase.h"
#include <debug_descriptor.h>
int vprlog(int log_level, const char *fmt, va_list ap)
{
int count;
char buffer[320];
bool flush_to_drivers = true;
unsigned long tb = mftb();
/* It's safe to return 0 when we "did" something here
* as only printf cares about how much we wrote, and
* if you change log_level to below PR_PRINTF then you
* get everything you deserve.
* By default, only PR_DEBUG and higher are stored in memory.
* PR_TRACE and PR_INSANE are for those having a bad day.
*/
if (log_level > (debug_descriptor.console_log_levels >> 4))
return 0;
count = snprintf(buffer, sizeof(buffer), "[%5lu.%09lu,%d] ",
tb_to_secs(tb), tb_remaining_nsecs(tb), log_level);
count+= vsnprintf(buffer+count, sizeof(buffer)-count, fmt, ap);
if (log_level > (debug_descriptor.console_log_levels & 0x0f))
flush_to_drivers = false;
console_write(flush_to_drivers, buffer, count);
return count;
}
/* we don't return anything as what on earth are we going to do
* if we actually fail to print a log message? Print a log message about it?
* Callers shouldn't care, prlog and friends should do something generically
* sane in such crazy situations.
*/
void _prlog(int log_level, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vprlog(log_level, fmt, ap);
va_end(ap);
}
int _printf(const char* fmt, ...)
{
int count;
va_list ap;
va_start(ap, fmt);
count = vprlog(PR_PRINTF, fmt, ap);
va_end(ap);
return count;
}
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