| /* |
| * Copyright (c) 2018-2019, Renesas Electronics Corporation. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <console_macros.S> |
| #include <drivers/renesas/rcar/console/console.h> |
| |
| .globl console_rcar_register |
| .globl console_rcar_init |
| .globl console_rcar_putc |
| .globl console_rcar_flush |
| |
| .extern rcar_log_init |
| .extern rcar_set_log_data |
| |
| /* ----------------------------------------------- |
| * int console_rcar_register( |
| * uintptr_t base, uint32_t clk, uint32_t baud, |
| * console_t *console) |
| * Function to initialize and register a new rcar |
| * console. Storage passed in for the console struct |
| * *must* be persistent (i.e. not from the stack). |
| * In: x0 - UART register base address |
| * w1 - UART clock in Hz |
| * w2 - Baud rate |
| * x3 - pointer to empty console_t struct |
| * Out: return 1 on success, 0 on error |
| * Clobber list : x0, x1, x2, x6, x7, x14 |
| * ----------------------------------------------- |
| */ |
| func console_rcar_register |
| mov x7, x30 |
| mov x6, x3 |
| cbz x6, register_fail |
| str x0, [x6, #CONSOLE_T_BASE] |
| |
| bl rcar_log_init |
| cbz x0, register_fail |
| |
| mov x0, x6 |
| mov x30, x7 |
| finish_console_register rcar, putc=1, getc=0, flush=1 |
| |
| register_fail: |
| ret x7 |
| endfunc console_rcar_register |
| |
| /* --------------------------------------------- |
| * int console_rcar_init(unsigned long base_addr, |
| * unsigned int uart_clk, unsigned int baud_rate) |
| * Function to initialize the console without a |
| * C Runtime to print debug information. This |
| * function will be accessed by crash reporting. |
| * In: x0 - console base address |
| * w1 - Uart clock in Hz |
| * w2 - Baud rate |
| * Out: return 1 on success |
| * Clobber list : x1, x2 |
| * --------------------------------------------- |
| */ |
| func console_rcar_init |
| mov w0, #0 |
| ret |
| endfunc console_rcar_init |
| |
| /* -------------------------------------------------------- |
| * int console_rcar_putc(int c, console_t *console) |
| * Function to output a character over the console. It |
| * returns the character printed on success or -1 on error. |
| * In : w0 - character to be printed |
| * x1 - pointer to console_t structure |
| * Out : return -1 on error else return character. |
| * Clobber list : x2 |
| * -------------------------------------------------------- |
| */ |
| func console_rcar_putc |
| b rcar_set_log_data |
| endfunc console_rcar_putc |
| |
| /* --------------------------------------------- |
| * int console_rcar_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_rcar_flush |
| mov w0, #0 |
| ret |
| endfunc console_rcar_flush |