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