1/*
2 * Copyright (C) 2014 Carlo Caione
3 * Carlo Caione <carlo@caione.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10#define MESON_AO_UART_WFIFO		0x0
11#define MESON_AO_UART_STATUS		0xc
12
13#define MESON_AO_UART_TX_FIFO_EMPTY	(1 << 22)
14#define MESON_AO_UART_TX_FIFO_FULL	(1 << 21)
15
16	.macro	addruart, rp, rv, tmp
17	ldr	\rp, =(CONFIG_DEBUG_UART_PHYS)		@ physical
18	ldr	\rv, =(CONFIG_DEBUG_UART_VIRT)		@ virtual
19	.endm
20
21	.macro	senduart,rd,rx
22	str	\rd, [\rx, #MESON_AO_UART_WFIFO]
23	.endm
24
25	.macro	busyuart,rd,rx
261002:	ldr	\rd, [\rx, #MESON_AO_UART_STATUS]
27	tst	\rd, #MESON_AO_UART_TX_FIFO_EMPTY
28	beq	1002b
29	.endm
30
31	.macro	waituart,rd,rx
321001:	ldr	\rd, [\rx, #MESON_AO_UART_STATUS]
33	tst	\rd, #MESON_AO_UART_TX_FIFO_FULL
34	bne	1001b
35	.endm
36