You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
878 B
35 lines
878 B
/* |
|
* Copyright (C) 2014 Carlo Caione |
|
* Carlo Caione <carlo@caione.org> |
|
* |
|
* This program is free software; you can redistribute it and/or modify |
|
* it under the terms of the GNU General Public License version 2 as |
|
* published by the Free Software Foundation. |
|
*/ |
|
|
|
#define MESON_AO_UART_WFIFO 0x0 |
|
#define MESON_AO_UART_STATUS 0xc |
|
|
|
#define MESON_AO_UART_TX_FIFO_EMPTY (1 << 22) |
|
#define MESON_AO_UART_TX_FIFO_FULL (1 << 21) |
|
|
|
.macro addruart, rp, rv, tmp |
|
ldr \rp, =(CONFIG_DEBUG_UART_PHYS) @ physical |
|
ldr \rv, =(CONFIG_DEBUG_UART_VIRT) @ virtual |
|
.endm |
|
|
|
.macro senduart,rd,rx |
|
str \rd, [\rx, #MESON_AO_UART_WFIFO] |
|
.endm |
|
|
|
.macro busyuart,rd,rx |
|
1002: ldr \rd, [\rx, #MESON_AO_UART_STATUS] |
|
tst \rd, #MESON_AO_UART_TX_FIFO_EMPTY |
|
beq 1002b |
|
.endm |
|
|
|
.macro waituart,rd,rx |
|
1001: ldr \rd, [\rx, #MESON_AO_UART_STATUS] |
|
tst \rd, #MESON_AO_UART_TX_FIFO_FULL |
|
bne 1001b |
|
.endm
|
|
|