summaryrefslogtreecommitdiffstats
path: root/arch/arm/include/debug/bcm63xx.S
blob: da65abb6738dba43de5af0c8ba0f5c3e00d84a44 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
/* 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