/* * 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 #include #include #include #include #include #include #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; } }