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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Console Log routines
* Wraps libc and console lower level functions
* does fancy-schmancy things like timestamps and priorities
* Doesn't make waffles.
*/
#include "skiboot.h"
#include "unistd.h"
#include "stdio.h"
#include "console.h"
#include "timebase.h"
#include <debug_descriptor.h>
static 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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