1 /*
2 * Copyright (c) 2015-2026, 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 correctly 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
console_renesas_putc(int c,console_t * pconsole)46 int console_renesas_putc(int c, console_t *pconsole)
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
renesas_log_init(void)78 int32_t renesas_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
console_renesas_init(uintptr_t base_addr,uint32_t uart_clk,uint32_t baud_rate)110 void console_renesas_init(uintptr_t base_addr, uint32_t uart_clk,
111 uint32_t baud_rate)
112 {
113 /*
114 * Compatibility with SCIF console only, may be
115 * invoked from R-Car Gen3 plat_crash_console_init()
116 */
117 }
118
119 static console_t console_renesas_console = {
120 .flags = CONSOLE_FLAG_BOOT,
121 .putc = console_renesas_putc,
122 };
123
console_renesas_register(uintptr_t baseaddr,uint32_t clock,uint32_t baud,uint32_t flags)124 void console_renesas_register(uintptr_t baseaddr, uint32_t clock,
125 uint32_t baud, uint32_t flags)
126 {
127 console_renesas_console.base = baseaddr;
128 console_renesas_console.flags = flags;
129
130 console_register(&console_renesas_console);
131 }
132