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/*
* Copyright (c) 2017-2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/* Runtime firmware routines to report errata status for the current CPU. */
#include <assert.h>
#include <stdbool.h>
#include <arch_helpers.h>
#include <common/debug.h>
#include <lib/cpus/errata_report.h>
#include <lib/el3_runtime/cpu_data.h>
#include <lib/spinlock.h>
#ifdef IMAGE_BL1
# define BL_STRING "BL1"
#elif defined(__aarch64__) && defined(IMAGE_BL31)
# define BL_STRING "BL31"
#elif !defined(__aarch64__) && defined(IMAGE_BL32)
# define BL_STRING "BL32"
#elif defined(IMAGE_BL2) && BL2_AT_EL3
# define BL_STRING "BL2"
#else
# error This image should not be printing errata status
#endif
/* Errata format: BL stage, CPU, errata ID, message */
#define ERRATA_FORMAT "%s: %s: CPU 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)
{
bool report_now;
/* If already reported, return false. */
if (*reported != 0U)
return 0;
/*
* Acquire lock. Determine whether status needs reporting, and then mark
* report status to true.
*/
spin_lock(lock);
report_now = (*reported == 0U);
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(unsigned 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 < ARRAY_SIZE(errata_status_str));
assert(cpu != NULL);
assert(id != NULL);
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;
}
}
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