/* SPDX-License-Identifier: GPL-2.0-only */
/* arch/arm/mach-imx/include/mach/debug-macro.S
 *
 * Debugging macro include header
 *
 *  Copyright (C) 1994-1999 Russell King
 *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
 */

#include <asm/assembler.h>
#include "imx-uart.h"

/*
 * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to
 * stay sync with that.  It's hard to maintain, and should be fixed
 * globally for multi-platform build to use a fixed virtual address
 * for low-level debug uart port across platforms.
 */
#define IMX_IO_P2V(x)   (                                               \
                        (((x) & 0x80000000) >> 7) |                     \
                        (0xf4000000 +                                   \
                        (((x) & 0x50000000) >> 6) +                     \
                        (((x) & 0x0b000000) >> 4) +                     \
                        (((x) & 0x000fffff))))

#define UART_VADDR      IMX_IO_P2V(UART_PADDR)

                .macro  addruart, rp, rv, tmp
                ldr     \rp, =UART_PADDR        @ physical
                ldr     \rv, =UART_VADDR        @ virtual
                .endm

                .macro  senduart,rd,rx
                ARM_BE8(rev \rd, \rd)
                str     \rd, [\rx, #0x40]       @ TXDATA
                .endm

                .macro  waituartcts,rd,rx
                .endm

                .macro  waituarttxrdy,rd,rx
                .endm

                .macro  busyuart,rd,rx
1002:           ldr     \rd, [\rx, #0x98]       @ SR2
                ARM_BE8(rev \rd, \rd)
                tst     \rd, #1 << 3            @ TXDC
                beq     1002b                   @ wait until transmit done
                .endm