From be58c81aff4cd4c0ccf43dbd7998da4a6a08c03b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 21 Apr 2024 19:43:51 +0200 Subject: Adding upstream version 2.10.0+dfsg. Signed-off-by: Daniel Baumann --- drivers/renesas/common/console/rcar_console.S | 93 +++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 drivers/renesas/common/console/rcar_console.S (limited to 'drivers/renesas/common/console/rcar_console.S') diff --git a/drivers/renesas/common/console/rcar_console.S b/drivers/renesas/common/console/rcar_console.S new file mode 100644 index 0000000..b683d7b --- /dev/null +++ b/drivers/renesas/common/console/rcar_console.S @@ -0,0 +1,93 @@ +/* + * Copyright (c) 2018-2021, Renesas Electronics Corporation. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include +#include +#include +#include + + .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, #1 + 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 + + /* --------------------------------------------- + * void console_rcar_flush(void) + * Function to force a write of all buffered + * data that hasn't been output. It returns void + * Clobber list : x0, x1 + * --------------------------------------------- + */ +func console_rcar_flush + ret +endfunc console_rcar_flush -- cgit v1.2.3