81 lines
2.2 KiB
ArmAsm
81 lines
2.2 KiB
ArmAsm
/*
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* Copyright (c) 2015-2017, ARM Limited and Contributors. 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 <aarch64/asm_macros.S>
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#include <aarch64/el3_common_macros.S>
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#include <debug.h>
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.globl console_init
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.globl console_putc
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.globl console_getc
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.globl console_flush
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.globl console_tstc
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/* -----------------------------------------------
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* int console_init(uintptr_t not_used,
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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. It saves
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* the console base to the data section.
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* In: x0 - not used
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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 else 0 on error
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* Clobber list : x1 - x4
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* -----------------------------------------------
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*/
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func console_init
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mov_imm x0, PLAT_BOOT_UART_BASE
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b console_core_init
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ret
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endfunc console_init
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/* ---------------------------------------------
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* int console_putc(int c)
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* Function to output a character over the
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* console. It returns the character printed on
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* success or -1 on error.
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* In : x0 - character to be printed
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* Out : return -1 on error else return character.
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* Clobber list : x1, x2
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* ---------------------------------------------
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*/
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func console_putc
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mov_imm x1, PLAT_BOOT_UART_BASE
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b console_core_putc
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endfunc console_putc
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/* ---------------------------------------------
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* int console_getc(void)
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* Function to get a character from the console.
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* It returns the character grabbed on success
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* or -1 on error.
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* Clobber list : x0, x1
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* ---------------------------------------------
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*/
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func console_getc
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mov_imm x0, PLAT_BOOT_UART_BASE
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b console_core_getc
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endfunc console_getc
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func console_tstc
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mov_imm x0, PLAT_BOOT_UART_BASE
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b console_core_tstc
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endfunc console_tstc
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/* ---------------------------------------------
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* int console_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 0
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* upon successful completion, otherwise it
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* returns -1.
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* Clobber list : x0, x1
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* ---------------------------------------------
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*/
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func console_flush
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mov_imm x0, PLAT_BOOT_UART_BASE
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b console_core_flush
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endfunc console_flush
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