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- /*
- * Copyright (c) 2017-2023, 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) && RESET_TO_BL2
- # 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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