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/* 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