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#include <linux/serial_reg.h>
12
13#define UART_SHIFT 2
14#define PICOXCELL_UART1_BASE 0x80230000
15#define PHYS_TO_IO(x) (((x) & 0x00ffffff) | 0xfe000000)
16
17 .macro addruart, rp, rv, tmp
18 ldr \rv, =PHYS_TO_IO(PICOXCELL_UART1_BASE)
19 ldr \rp, =PICOXCELL_UART1_BASE
20 .endm
21
22 .macro senduart,rd,rx
23 str \rd, [\rx, #UART_TX << UART_SHIFT]
24 .endm
25
26 .macro busyuart,rd,rx
271002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
28 and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
29 teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
30 bne 1002b
31 .endm
32
33 /* The UART's don't have any flow control IO's wired up. */
34 .macro waituart,rd,rx
35 .endm