rcar_gen3: drivers: console

Signed-off-by: ldts <jramirez@baylibre.com>

drivers/renesas/rcar/console/rcar_console.S

+/*
+ * Copyright (c) 2018, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+
+	.globl	console_init
+	.globl	console_putc
+	.globl	console_uninit
+	.globl	console_core_init
+	.globl	console_core_putc
+	.globl	console_core_getc
+	.globl	console_flush
+
+	.extern	rcar_log_init
+	.extern	rcar_set_log_data
+
+	/* -----------------------------------------------
+	 * int console_core_init(unsigned long base_addr,
+	 * unsigned int uart_clk, unsigned int baud_rate)
+	 * Function to initialize the log area. This
+	 * function will be accessed by console_init and
+	 * crash reporting.
+	 * Return 1 on SUCCESS, 0 on error
+	 * In: x0 - Not used
+	 *     w1 - Not used
+	 *     w2 - Not used
+	 * -----------------------------------------------
+	 */
+func console_core_init
+	b	rcar_log_init
+endfunc console_core_init
+func  console_init
+	b	console_core_init
+endfunc console_init
+
+	/* --------------------------------------------------------
+	 * int console_core_putc(int c, unsigned long base_addr)
+	 * Function to output a character over the log area.
+	 * Return 1 on SUCCESS, 0 on error
+	 * In : w0 - Not used
+	 *      x1 - Not used
+	 * --------------------------------------------------------
+	 */
+func console_core_putc
+	b	rcar_set_log_data
+endfunc console_core_putc
+func console_putc
+	b	console_core_putc
+endfunc console_putc
+
+	/* ---------------------------------------------
+	 * int console_core_getc(unsigned long base_addr)
+	 * Function to get a character from the console.
+	 * It returns the character grabbed on success
+	 * or -1 on error.
+	 * In : x0 - console base address
+	 * Clobber list : x0, x1
+	 * ---------------------------------------------
+	 */
+func console_core_getc
+	ret
+endfunc console_core_getc
+
+	/* -----------------------------------------------
+	 * void console_uninit(void)
+	 * Function to finish the use of console driver.
+	 * -----------------------------------------------
+	 */
+func console_uninit
+	ret
+endfunc console_uninit
+
+	/* ---------------------------------------------
+	 * int console_flush(void)
+	 * Function to force a write of all buffered
+	 * data that hasn't been output. It returns 0
+	 * upon successful completion, otherwise it
+	 * returns -1.
+	 * Clobber list : x0, x1
+	 * ---------------------------------------------
+	 */
+func console_flush
+	mov	w0, #0
+	ret
+endfunc console_flush

drivers/renesas/rcar/console/rcar_printf.c

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <debug.h>
+#include <stdarg.h>
+#include <stdint.h>
+
+#include	<arch_helpers.h>
+#include	<platform_def.h>
+#include	<bakery_lock.h>
+#include	"rcar_def.h"
+#include	"rcar_private.h"
+#include	"rcar_printf.h"
+
+#define INDEX_TIMER_COUNT	(4U)
+
+extern RCAR_INSTANTIATE_LOCK typedef struct log_head {
+	uint8_t head[4];
+	uint32_t index;
+	uint32_t size;
+	uint8_t res[4];
+} 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)
+{
+
+	static const uint8_t const_header[] = "TLOG";
+	logmap_t *t_log;
+	int16_t init_flag = 0;
+
+	t_log = (logmap_t *) RCAR_BL31_LOG_BASE;
+	if (memcmp
+	    ((const void *)t_log->header.head, (const void *)const_header,
+	     sizeof(t_log->header.head)) != 0) {
+		/*
+		 * 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) {
+		(void)memset((void *)t_log->log_data, 0,
+			     (size_t) RCAR_BL31_LOG_MAX);
+		(void)memcpy((void *)t_log->header.head,
+			     (const void *)const_header,
+			     sizeof(t_log->header.head));
+		t_log->header.index = 0U;
+		t_log->header.size = 0U;
+#ifndef IMAGE_BL2
+		rcar_stack_generic_timer[INDEX_TIMER_COUNT] = 0U;
+#endif
+	}
+	rcar_lock_init();
+
+	return 1;
+}

drivers/renesas/rcar/console/rcar_printf.h

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef	RCAR_PRINTF_H__
+#define	RCAR_PRINTF_H__
+
+#include <string.h>
+
+int32_t rcar_set_log_data(int32_t c);
+int32_t rcar_log_init(void);
+
+#if IMAGE_BL31
+extern uint64_t rcar_stack_generic_timer[5];
+#endif
+
+#endif