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/*
* Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch_helpers.h>
#include <platform.h>
#include <spinlock.h>
#include <stdarg.h>
#include <stdio.h>
/* Lock to avoid concurrent accesses to the serial console */
static spinlock_t printf_lock;
/*
* Print the MPID header, e.g.: [cpu 0x0100]
*
* If SHELL_COLOR == 1, this also prints shell's color escape sequences to ease
* identifying which CPU displays the message. There are 8 standard colors so
* if the platform has more than 8 CPUs, some colors will be reused.
*/
#if SHELL_COLOR
#define PRINT_MPID_HDR(_mpid) \
do { \
unsigned int linear_id = platform_get_core_pos(_mpid); \
printf("\033[1;%u;40m", 30 + (linear_id & 0x7)); \
printf("[cpu 0x%.4x] ", _mpid); \
printf("\033[0m"); \
} while (0)
#else
#define PRINT_MPID_HDR(_mpid) \
printf("[cpu 0x%.4x] ", _mpid)
#endif /* SHELL_COLOR */
void mp_printf(const char *fmt, ...)
{
va_list ap;
char str[256];
unsigned int mpid = read_mpidr_el1() & 0xFFFF;
/*
* TODO: It would be simpler to use vprintf() instead of
* vsnprintf() + printf(), we wouldn't need to declare a static buffer
* for storing the product of vsnprintf(). Unfortunately our C library
* doesn't provide vprintf() at the moment.
* Import vprintf() code from FreeBSD C library to our local C library.
*/
va_start(ap, fmt);
vsnprintf(str, sizeof(str), fmt, ap);
str[sizeof(str) - 1] = 0;
va_end(ap);
spin_lock(&printf_lock);
PRINT_MPID_HDR(mpid);
printf("%s", str);
spin_unlock(&printf_lock);
}
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