18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-only */
28c2ecf20Sopenharmony_ci/* arch/arm/mach-imx/include/mach/debug-macro.S
38c2ecf20Sopenharmony_ci *
48c2ecf20Sopenharmony_ci * Debugging macro include header
58c2ecf20Sopenharmony_ci *
68c2ecf20Sopenharmony_ci *  Copyright (C) 1994-1999 Russell King
78c2ecf20Sopenharmony_ci *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
88c2ecf20Sopenharmony_ci */
98c2ecf20Sopenharmony_ci
108c2ecf20Sopenharmony_ci#include <asm/assembler.h>
118c2ecf20Sopenharmony_ci#include "imx-uart.h"
128c2ecf20Sopenharmony_ci
138c2ecf20Sopenharmony_ci/*
148c2ecf20Sopenharmony_ci * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to
158c2ecf20Sopenharmony_ci * stay sync with that.  It's hard to maintain, and should be fixed
168c2ecf20Sopenharmony_ci * globally for multi-platform build to use a fixed virtual address
178c2ecf20Sopenharmony_ci * for low-level debug uart port across platforms.
188c2ecf20Sopenharmony_ci */
198c2ecf20Sopenharmony_ci#define IMX_IO_P2V(x)	(						\
208c2ecf20Sopenharmony_ci			(((x) & 0x80000000) >> 7) |			\
218c2ecf20Sopenharmony_ci			(0xf4000000 +					\
228c2ecf20Sopenharmony_ci			(((x) & 0x50000000) >> 6) +			\
238c2ecf20Sopenharmony_ci			(((x) & 0x0b000000) >> 4) +			\
248c2ecf20Sopenharmony_ci			(((x) & 0x000fffff))))
258c2ecf20Sopenharmony_ci
268c2ecf20Sopenharmony_ci#define UART_VADDR	IMX_IO_P2V(UART_PADDR)
278c2ecf20Sopenharmony_ci
288c2ecf20Sopenharmony_ci		.macro	addruart, rp, rv, tmp
298c2ecf20Sopenharmony_ci		ldr	\rp, =UART_PADDR	@ physical
308c2ecf20Sopenharmony_ci		ldr	\rv, =UART_VADDR	@ virtual
318c2ecf20Sopenharmony_ci		.endm
328c2ecf20Sopenharmony_ci
338c2ecf20Sopenharmony_ci		.macro	senduart,rd,rx
348c2ecf20Sopenharmony_ci		ARM_BE8(rev \rd, \rd)
358c2ecf20Sopenharmony_ci		str	\rd, [\rx, #0x40]	@ TXDATA
368c2ecf20Sopenharmony_ci		.endm
378c2ecf20Sopenharmony_ci
388c2ecf20Sopenharmony_ci		.macro	waituartcts,rd,rx
398c2ecf20Sopenharmony_ci		.endm
408c2ecf20Sopenharmony_ci
418c2ecf20Sopenharmony_ci		.macro	waituarttxrdy,rd,rx
428c2ecf20Sopenharmony_ci		.endm
438c2ecf20Sopenharmony_ci
448c2ecf20Sopenharmony_ci		.macro	busyuart,rd,rx
458c2ecf20Sopenharmony_ci1002:		ldr	\rd, [\rx, #0x98]	@ SR2
468c2ecf20Sopenharmony_ci		ARM_BE8(rev \rd, \rd)
478c2ecf20Sopenharmony_ci		tst	\rd, #1 << 3		@ TXDC
488c2ecf20Sopenharmony_ci		beq	1002b			@ wait until transmit done
498c2ecf20Sopenharmony_ci		.endm
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