34 lines
643 B
ArmAsm
34 lines
643 B
ArmAsm
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* Broadcom BCM63xx low-level UART debug
|
||
|
|
*
|
||
|
|
* Copyright (C) 2014 Broadcom Corporation
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/serial_bcm63xx.h>
|
||
|
|
|
||
|
|
.macro addruart, rp, rv, tmp
|
||
|
|
ldr \rp, =CONFIG_DEBUG_UART_PHYS
|
||
|
|
ldr \rv, =CONFIG_DEBUG_UART_VIRT
|
||
|
|
.endm
|
||
|
|
|
||
|
|
.macro senduart, rd, rx
|
||
|
|
/* word access do not work */
|
||
|
|
strb \rd, [\rx, #UART_FIFO_REG]
|
||
|
|
.endm
|
||
|
|
|
||
|
|
.macro waituarttxrdy, rd, rx
|
||
|
|
1001: ldr \rd, [\rx, #UART_IR_REG]
|
||
|
|
tst \rd, #(1 << UART_IR_TXEMPTY)
|
||
|
|
beq 1001b
|
||
|
|
.endm
|
||
|
|
|
||
|
|
.macro waituartcts, rd, rx
|
||
|
|
.endm
|
||
|
|
|
||
|
|
.macro busyuart, rd, rx
|
||
|
|
1002: ldr \rd, [\rx, #UART_IR_REG]
|
||
|
|
tst \rd, #(1 << UART_IR_TXTRESH)
|
||
|
|
beq 1002b
|
||
|
|
.endm
|