blob: 29b26c2e8964f8ddfc08972eb20ce6fd1d99c649 [file] [log] [blame]
/*
* Copyright (c) 2017, 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.
*/
/* Runtime firmware routines to report errata status for the current CPU. */
#include <arch_helpers.h>
#include <assert.h>
#include <cpu_data.h>
#include <debug.h>
#include <errata_report.h>
#include <spinlock.h>
#include <utils.h>
#ifdef IMAGE_BL1
# define BL_STRING "BL1"
#elif defined(AARCH64) && defined(IMAGE_BL31)
# define BL_STRING "BL31"
#elif defined(AARCH32) && defined(IMAGE_BL32)
# define BL_STRING "BL32"
#else
# error This image should not be printing errata status
#endif
/* Errata format: BL stage, CPU, errata ID, message */
#define ERRATA_FORMAT "%s: %s: errata workaround for %s was %s\n"
/*
* Returns whether errata needs to be reported. Passed arguments are private to
* a CPU type.
*/
int errata_needs_reporting(spinlock_t *lock, uint32_t *reported)
{
int report_now;
/* If already reported, return false. */
if (*reported)
return 0;
/*
* Acquire lock. Determine whether status needs reporting, and then mark
* report status to true.
*/
spin_lock(lock);
report_now = !(*reported);
if (report_now)
*reported = 1;
spin_unlock(lock);
return report_now;
}
/*
* Print errata status message.
*
* Unknown: WARN
* Missing: WARN
* Applied: INFO
* Not applied: VERBOSE
*/
void errata_print_msg(int status, const char *cpu, const char *id)
{
/* Errata status strings */
static const char *const errata_status_str[] = {
[ERRATA_NOT_APPLIES] = "not applied",
[ERRATA_APPLIES] = "applied",
[ERRATA_MISSING] = "missing!"
};
static const char *const __unused bl_str = BL_STRING;
const char *msg __unused;
assert(status >= 0 && status < ARRAY_SIZE(errata_status_str));
assert(cpu);
assert(id);
msg = errata_status_str[status];
switch (status) {
case ERRATA_NOT_APPLIES:
VERBOSE(ERRATA_FORMAT, bl_str, cpu, id, msg);
break;
case ERRATA_APPLIES:
INFO(ERRATA_FORMAT, bl_str, cpu, id, msg);
break;
case ERRATA_MISSING:
WARN(ERRATA_FORMAT, bl_str, cpu, id, msg);
break;
default:
WARN(ERRATA_FORMAT, bl_str, cpu, id, "unknown");
break;
}
}