Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
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 * Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit
9 * accesses to the 8250.
10 */
11
12#include <linux/serial_reg.h>
13
14 .macro senduart,rd,rx
15 str \rd, [\rx, #UART_TX << UART_SHIFT]
16 .endm
17
18 .macro busyuart,rd,rx
191002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
20 and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
21 teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
22 bne 1002b
23 .endm
24
25 /* The UART's don't have any flow control IO's wired up. */
26 .macro waituart,rd,rx
27 .endm