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https://github.com/ARM-software/arm-trusted-firmware.git
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0b3d4273fa
Write char if fifo is empty. If this is done like this all chars are printed. Because origin code just put that chars to fifo and in case of reset messages were missing. Before this change chars are put to fifo and only check before adding if fifo is full. The patch is changing this logic that it is adding char only when fifo is empty to make sure that in case of reset (by another SW for example) all chars are printed. Maybe one char can be missed but for IP itself it is much easier to send just one char compare to full fifo. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Change-Id: Ic24c2c1252bce24be2aed68ee29477ca4a549e5f
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
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* Copyright (c) 2016-2018, 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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#ifndef CDNS_UART_H
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#define CDNS_UART_H
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#include <drivers/console.h>
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/* This is very minimalistic and will only work in QEMU. */
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/* CADENCE Registers */
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#define R_UART_CR 0
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#define R_UART_CR_RXRST (1 << 0) /* RX logic reset */
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#define R_UART_CR_TXRST (1 << 1) /* TX logic reset */
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#define R_UART_CR_RX_EN (1 << 2) /* RX enabled */
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#define R_UART_CR_TX_EN (1 << 4) /* TX enabled */
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#define R_UART_SR 0x2C
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#define UART_SR_INTR_REMPTY_BIT 1
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#define UART_SR_INTR_TFUL_BIT 4
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#define UART_SR_INTR_TEMPTY_BIT 3
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#define R_UART_TX 0x30
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#define R_UART_RX 0x30
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#ifndef __ASSEMBLER__
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#include <stdint.h>
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/*
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* Initialize a new Cadence console instance and register it with the console
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* framework. The |console| pointer must point to storage that will be valid
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* for the lifetime of the console, such as a global or static local variable.
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* Its contents will be reinitialized from scratch.
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*/
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int console_cdns_register(uintptr_t baseaddr, uint32_t clock, uint32_t baud,
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console_t *console);
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#endif /*__ASSEMBLER__*/
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#endif /* CDNS_UART_H */
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