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/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2003-2005 SAN People * * Debugging macro include header */ #define AT91_DBGU_SR (0x14) /* Status Register */ #define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */ #define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */ #define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */ .macro addruart, rp, rv, tmp ldr \rp, =CONFIG_DEBUG_UART_PHYS @ System peripherals (phys address) ldr \rv, =CONFIG_DEBUG_UART_VIRT @ System peripherals (virt address) .endm .macro senduart,rd,rx strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register .endm .macro waituarttxrdy,rd,rx 1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit beq 1001b .endm .macro waituartcts,rd,rx .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete beq 1001b .endm