GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/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 <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, #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