Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright 2013 Freescale Semiconductor, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 */
9
10 .macro addruart, rp, rv, tmp
11 ldr \rp, =0x40028000 @ physical
12 ldr \rv, =0xfe028000 @ virtual
13 .endm
14
15 .macro senduart, rd, rx
16 strb \rd, [\rx, #0x7] @ Data Register
17 .endm
18
19 .macro busyuart, rd, rx
201001: ldrb \rd, [\rx, #0x4] @ Status Register 1
21 tst \rd, #1 << 6 @ TC
22 beq 1001b @ wait until transmit done
23 .endm
24
25 .macro waituart,rd,rx
26 .endm