1/* SPDX-License-Identifier: GPL-2.0-only */
2/* arch/arm/mach-imx/include/mach/debug-macro.S
3 *
4 * Debugging macro include header
5 *
6 *  Copyright (C) 1994-1999 Russell King
7 *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
8 */
9
10#include <asm/assembler.h>
11#include "imx-uart.h"
12
13/*
14 * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to
15 * stay sync with that.  It's hard to maintain, and should be fixed
16 * globally for multi-platform build to use a fixed virtual address
17 * for low-level debug uart port across platforms.
18 */
19#define IMX_IO_P2V(x)	(						\
20			(((x) & 0x80000000) >> 7) |			\
21			(0xf4000000 +					\
22			(((x) & 0x50000000) >> 6) +			\
23			(((x) & 0x0b000000) >> 4) +			\
24			(((x) & 0x000fffff))))
25
26#define UART_VADDR	IMX_IO_P2V(UART_PADDR)
27
28		.macro	addruart, rp, rv, tmp
29		ldr	\rp, =UART_PADDR	@ physical
30		ldr	\rv, =UART_VADDR	@ virtual
31		.endm
32
33		.macro	senduart,rd,rx
34		ARM_BE8(rev \rd, \rd)
35		str	\rd, [\rx, #0x40]	@ TXDATA
36		.endm
37
38		.macro	waituartcts,rd,rx
39		.endm
40
41		.macro	waituarttxrdy,rd,rx
42		.endm
43
44		.macro	busyuart,rd,rx
451002:		ldr	\rd, [\rx, #0x98]	@ SR2
46		ARM_BE8(rev \rd, \rd)
47		tst	\rd, #1 << 3		@ TXDC
48		beq	1002b			@ wait until transmit done
49		.endm
50