1 /* 2 * Copyright (c) 2015-2020, Renesas Electronics Corporation. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <stdarg.h> 8 #include <stdint.h> 9 10 #include <platform_def.h> 11 12 #include <arch_helpers.h> 13 #include <common/debug.h> 14 #include <lib/bakery_lock.h> 15 16 #include "rcar_def.h" 17 #include "rcar_private.h" 18 #include "rcar_printf.h" 19 20 #define INDEX_TIMER_COUNT (4U) 21 22 #define RCAR_LOG_HEAD (('T' << 0) | ('L' << 8) | ('O' << 16) | ('G' << 24)) 23 24 /* 25 * The log is initialized and used before BL31 xlat tables are initialized, 26 * therefore the log memory is a device memory at that point. Make sure the 27 * memory is correclty aligned and accessed only with up-to 32bit, aligned, 28 * writes. 29 */ 30 CASSERT((RCAR_BL31_LOG_BASE & 0x7) == 0, assert_bl31_log_base_unaligned); 31 CASSERT((RCAR_BL31_LOG_MAX & 0x7) == 0, assert_bl31_log_max_unaligned); 32 33 extern RCAR_INSTANTIATE_LOCK typedef struct log_head { 34 uint32_t head; 35 uint32_t index; 36 uint32_t size; 37 uint32_t res; 38 } loghead_t; 39 40 typedef struct log_map { 41 loghead_t header; 42 uint8_t log_data[RCAR_BL31_LOG_MAX]; 43 uint8_t res_data[RCAR_LOG_RES_SIZE]; 44 } logmap_t; 45 rcar_set_log_data(int32_t c)46int32_t rcar_set_log_data(int32_t c) 47 { 48 logmap_t *t_log; 49 50 t_log = (logmap_t *) RCAR_BL31_LOG_BASE; 51 52 rcar_lock_get(); 53 54 /* 55 * If index is broken, then index and size initialize 56 */ 57 if (t_log->header.index >= (uint32_t) RCAR_BL31_LOG_MAX) { 58 t_log->header.index = 0U; 59 t_log->header.size = 0U; 60 } 61 /* 62 * data store to log area then index and size renewal 63 */ 64 t_log->log_data[t_log->header.index] = (uint8_t) c; 65 t_log->header.index++; 66 if (t_log->header.size < t_log->header.index) { 67 t_log->header.size = t_log->header.index; 68 } 69 if (t_log->header.index >= (uint32_t) RCAR_BL31_LOG_MAX) { 70 t_log->header.index = 0U; 71 } 72 73 rcar_lock_release(); 74 75 return 1; 76 } 77 rcar_log_init(void)78int32_t rcar_log_init(void) 79 { 80 logmap_t *t_log = (logmap_t *)RCAR_BL31_LOG_BASE; 81 uint32_t *log_data = (uint32_t *)t_log->log_data; 82 int16_t init_flag = 0; 83 int i; 84 85 if (t_log->header.head != RCAR_LOG_HEAD) { 86 /* 87 * Log header is not "TLOG", then log area initialize 88 */ 89 init_flag = 1; 90 } 91 if (t_log->header.index >= (uint32_t) RCAR_BL31_LOG_MAX) { 92 /* 93 * index is broken, then log area initialize 94 */ 95 init_flag = 1; 96 } 97 if (init_flag == 1) { 98 for (i = 0; i < RCAR_BL31_LOG_MAX; i += 4) 99 *log_data++ = 0; 100 101 t_log->header.head = RCAR_LOG_HEAD; 102 t_log->header.index = 0U; 103 t_log->header.size = 0U; 104 } 105 rcar_lock_init(); 106 107 return 1; 108 } 109