1/* arch/arm/mach-imx/include/mach/debug-macro.S
2 *
3 * Debugging macro include header
4 *
5 *  Copyright (C) 1994-1999 Russell King
6 *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 */
13
14#include "imx-uart.h"
15
16/*
17 * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to
18 * stay sync with that.  It's hard to maintain, and should be fixed
19 * globally for multi-platform build to use a fixed virtual address
20 * for low-level debug uart port across platforms.
21 */
22#define IMX_IO_P2V(x)	(						\
23			(((x) & 0x80000000) >> 7) |			\
24			(0xf4000000 +					\
25			(((x) & 0x50000000) >> 6) +			\
26			(((x) & 0x0b000000) >> 4) +			\
27			(((x) & 0x000fffff))))
28
29#define UART_VADDR	IMX_IO_P2V(UART_PADDR)
30
31		.macro	addruart, rp, rv, tmp
32		ldr	\rp, =UART_PADDR	@ physical
33		ldr	\rv, =UART_VADDR	@ virtual
34		.endm
35
36		.macro	senduart,rd,rx
37		str	\rd, [\rx, #0x40]	@ TXDATA
38		.endm
39
40		.macro	waituart,rd,rx
41		.endm
42
43		.macro	busyuart,rd,rx
441002:		ldr	\rd, [\rx, #0x98]	@ SR2
45		tst	\rd, #1 << 3		@ TXDC
46		beq	1002b			@ wait until transmit done
47		.endm
48