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https://github.com/ARM-software/arm-trusted-firmware.git
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831b0e9824
And from crash_console_flush. We ignore the error information return by console_flush in _every_ place where we call it, and casting the return type to void does not work around the MISRA violation that this causes. Instead, we collect the error information from the driver (to avoid changing that API), and don't return it to the caller. Change-Id: I1e35afe01764d5c8f0efd04f8949d333ffb688c1 Signed-off-by: Jimmy Brisson <jimmy.brisson@arm.com>
88 lines
1.6 KiB
ArmAsm
88 lines
1.6 KiB
ArmAsm
/*
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* Copyright (c) 2018-2020, 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 <arch.h>
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#include <asm_macros.S>
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#include <console_macros.S>
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#include <assert_macros.S>
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#include "imx_uart.h"
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#define URXD 0x0 /* Receiver Register */
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#define UTXD 0x40 /* Transmitter Register */
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#define UTS 0xb4 /* UART Test Register (mx31) */
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#define URXD_RX_DATA (0xFF)
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.globl console_imx_uart_register
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.globl console_imx_uart_init
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.globl console_imx_uart_putc
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.globl console_imx_uart_getc
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.globl console_imx_uart_flush
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func console_imx_uart_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 console_imx_uart_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 imx_uart putc=1, getc=1, flush=1
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register_fail:
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ret x7
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endfunc console_imx_uart_register
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func console_imx_uart_init
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mov w0, #1
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ret
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endfunc console_imx_uart_init
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func console_imx_uart_putc
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ldr x1, [x1, #CONSOLE_T_BASE]
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cbz x1, putc_error
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/* Prepare '\r' to '\n' */
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cmp w0, #0xA
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b.ne 2f
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1:
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/* Check if the transmit FIFO is full */
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ldr w2, [x1, #UTS]
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tbz w2, #6, 1b
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mov w2, #0xD
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str w2, [x1, #UTXD]
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2:
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/* Check if the transmit FIFO is full */
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ldr w2, [x1, #UTS]
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tbz w2, #6, 2b
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str w0, [x1, #UTXD]
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ret
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putc_error:
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mov w0, #-1
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ret
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endfunc console_imx_uart_putc
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func console_imx_uart_getc
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ldr x0, [x0, #CONSOLE_T_BASE]
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cbz x0, getc_error
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1:
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ldr w1, [x0, #UTS]
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tbnz w1, #5, 1b
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ldr w1, [x0, #URXD]
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and w0, w1, #URXD_RX_DATA
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ret
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getc_error:
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mov w0, #-1
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ret
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endfunc console_imx_uart_getc
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func console_imx_uart_flush
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ret
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endfunc console_imx_uart_flush
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