/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * arch/arm/include/debug/8250.S
 *
 *  Copyright (C) 1994-2013 Russell King
 */
#include <linux/serial_reg.h>

                .macro  addruart, rp, rv, tmp
                ldr     \rp, =CONFIG_DEBUG_UART_PHYS
                ldr     \rv, =CONFIG_DEBUG_UART_VIRT
                .endm

#ifdef CONFIG_DEBUG_UART_8250_WORD
                .macro  store, rd, rx:vararg
         ARM_BE8(rev \rd, \rd)
                str     \rd, \rx
         ARM_BE8(rev \rd, \rd)
                .endm

                .macro  load, rd, rx:vararg
                ldr     \rd, \rx
        ARM_BE8(rev \rd, \rd)
                .endm
#else
                .macro  store, rd, rx:vararg
                strb    \rd, \rx
                .endm

                .macro  load, rd, rx:vararg
                ldrb    \rd, \rx
                .endm
#endif

#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT

                .macro  senduart,rd,rx
                store   \rd, [\rx, #UART_TX << UART_SHIFT]
                .endm

                .macro  busyuart,rd,rx
1002:           load    \rd, [\rx, #UART_LSR << UART_SHIFT]
                and     \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
                teq     \rd, #UART_LSR_TEMT | UART_LSR_THRE
                bne     1002b
                .endm

                .macro  waituarttxrdy,rd,rx
                .endm

                .macro  waituartcts,rd,rx
1001:           load    \rd, [\rx, #UART_MSR << UART_SHIFT]
                tst     \rd, #UART_MSR_CTS
                beq     1001b
                .endm