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path: root/drivers/renesas/common/console/rcar_printf.c
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Diffstat (limited to 'drivers/renesas/common/console/rcar_printf.c')
-rw-r--r--drivers/renesas/common/console/rcar_printf.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/renesas/common/console/rcar_printf.c b/drivers/renesas/common/console/rcar_printf.c
new file mode 100644
index 0000000000..ad074fe059
--- /dev/null
+++ b/drivers/renesas/common/console/rcar_printf.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2015-2020, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdarg.h>
+#include <stdint.h>
+
+#include <platform_def.h>
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <lib/bakery_lock.h>
+
+#include "rcar_def.h"
+#include "rcar_private.h"
+#include "rcar_printf.h"
+
+#define INDEX_TIMER_COUNT (4U)
+
+#define RCAR_LOG_HEAD (('T' << 0) | ('L' << 8) | ('O' << 16) | ('G' << 24))
+
+/*
+ * The log is initialized and used before BL31 xlat tables are initialized,
+ * therefore the log memory is a device memory at that point. Make sure the
+ * memory is correclty aligned and accessed only with up-to 32bit, aligned,
+ * writes.
+ */
+CASSERT((RCAR_BL31_LOG_BASE & 0x7) == 0, assert_bl31_log_base_unaligned);
+CASSERT((RCAR_BL31_LOG_MAX & 0x7) == 0, assert_bl31_log_max_unaligned);
+
+extern RCAR_INSTANTIATE_LOCK typedef struct log_head {
+ uint32_t head;
+ uint32_t index;
+ uint32_t size;
+ uint32_t res;
+} loghead_t;
+
+typedef struct log_map {
+ loghead_t header;
+ uint8_t log_data[RCAR_BL31_LOG_MAX];
+ uint8_t res_data[RCAR_LOG_RES_SIZE];
+} logmap_t;
+
+int32_t rcar_set_log_data(int32_t c)
+{
+ logmap_t *t_log;
+
+ t_log = (logmap_t *) RCAR_BL31_LOG_BASE;
+
+ rcar_lock_get();
+
+ /*
+ * If index is broken, then index and size initialize
+ */
+ if (t_log->header.index >= (uint32_t) RCAR_BL31_LOG_MAX) {
+ t_log->header.index = 0U;
+ t_log->header.size = 0U;
+ }
+ /*
+ * data store to log area then index and size renewal
+ */
+ t_log->log_data[t_log->header.index] = (uint8_t) c;
+ t_log->header.index++;
+ if (t_log->header.size < t_log->header.index) {
+ t_log->header.size = t_log->header.index;
+ }
+ if (t_log->header.index >= (uint32_t) RCAR_BL31_LOG_MAX) {
+ t_log->header.index = 0U;
+ }
+
+ rcar_lock_release();
+
+ return 1;
+}
+
+int32_t rcar_log_init(void)
+{
+ logmap_t *t_log = (logmap_t *)RCAR_BL31_LOG_BASE;
+ uint32_t *log_data = (uint32_t *)t_log->log_data;
+ int16_t init_flag = 0;
+ int i;
+
+ if (t_log->header.head != RCAR_LOG_HEAD) {
+ /*
+ * Log header is not "TLOG", then log area initialize
+ */
+ init_flag = 1;
+ }
+ if (t_log->header.index >= (uint32_t) RCAR_BL31_LOG_MAX) {
+ /*
+ * index is broken, then log area initialize
+ */
+ init_flag = 1;
+ }
+ if (init_flag == 1) {
+ for (i = 0; i < RCAR_BL31_LOG_MAX; i += 4)
+ *log_data++ = 0;
+
+ t_log->header.head = RCAR_LOG_HEAD;
+ t_log->header.index = 0U;
+ t_log->header.size = 0U;
+ }
+ rcar_lock_init();
+
+ return 1;
+}