1 /* 2 * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* Runtime firmware routines to report errata status for the current CPU. */ 32 33 #include <arch_helpers.h> 34 #include <assert.h> 35 #include <cpu_data.h> 36 #include <debug.h> 37 #include <errata_report.h> 38 #include <spinlock.h> 39 #include <utils.h> 40 41 #ifdef IMAGE_BL1 42 # define BL_STRING "BL1" 43 #elif defined(AARCH64) && defined(IMAGE_BL31) 44 # define BL_STRING "BL31" 45 #elif defined(AARCH32) && defined(IMAGE_BL32) 46 # define BL_STRING "BL32" 47 #else 48 # error This image should not be printing errata status 49 #endif 50 51 /* Errata format: BL stage, CPU, errata ID, message */ 52 #define ERRATA_FORMAT "%s: %s: errata workaround for %s was %s\n" 53 54 /* 55 * Returns whether errata needs to be reported. Passed arguments are private to 56 * a CPU type. 57 */ 58 int errata_needs_reporting(spinlock_t *lock, uint32_t *reported) 59 { 60 int report_now; 61 62 /* If already reported, return false. */ 63 if (*reported) 64 return 0; 65 66 /* 67 * Acquire lock. Determine whether status needs reporting, and then mark 68 * report status to true. 69 */ 70 spin_lock(lock); 71 report_now = !(*reported); 72 if (report_now) 73 *reported = 1; 74 spin_unlock(lock); 75 76 return report_now; 77 } 78 79 /* 80 * Print errata status message. 81 * 82 * Unknown: WARN 83 * Missing: WARN 84 * Applied: INFO 85 * Not applied: VERBOSE 86 */ 87 void errata_print_msg(int status, const char *cpu, const char *id) 88 { 89 /* Errata status strings */ 90 static const char *const errata_status_str[] = { 91 [ERRATA_NOT_APPLIES] = "not applied", 92 [ERRATA_APPLIES] = "applied", 93 [ERRATA_MISSING] = "missing!" 94 }; 95 static const char *const __unused bl_str = BL_STRING; 96 const char *msg __unused; 97 98 99 assert(status >= 0 && status < ARRAY_SIZE(errata_status_str)); 100 assert(cpu); 101 assert(id); 102 103 msg = errata_status_str[status]; 104 105 switch (status) { 106 case ERRATA_NOT_APPLIES: 107 VERBOSE(ERRATA_FORMAT, bl_str, cpu, id, msg); 108 break; 109 110 case ERRATA_APPLIES: 111 INFO(ERRATA_FORMAT, bl_str, cpu, id, msg); 112 break; 113 114 case ERRATA_MISSING: 115 WARN(ERRATA_FORMAT, bl_str, cpu, id, msg); 116 break; 117 118 default: 119 WARN(ERRATA_FORMAT, bl_str, cpu, id, "unknown"); 120 break; 121 } 122 } 123