1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Broadcom BCM63xx low-level UART debug
5 * Copyright (C) 2014 Broadcom Corporation
8 #include <linux/serial_bcm63xx.h>
10 .macro addruart, rp, rv, tmp
11 ldr \rp, =CONFIG_DEBUG_UART_PHYS
12 ldr \rv, =CONFIG_DEBUG_UART_VIRT
15 .macro senduart, rd, rx
16 /* word access do not work */
17 strb \rd, [\rx, #UART_FIFO_REG]
20 .macro waituart, rd, rx
21 1001: ldr \rd, [\rx, #UART_IR_REG]
22 tst \rd, #(1 << UART_IR_TXEMPTY)
26 .macro busyuart, rd, rx
27 1002: ldr \rd, [\rx, #UART_IR_REG]
28 tst \rd, #(1 << UART_IR_TXTRESH)