meson.S (771B)
1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2014 Carlo Caione 4 * Carlo Caione <carlo@caione.org> 5 */ 6 7#define MESON_AO_UART_WFIFO 0x0 8#define MESON_AO_UART_STATUS 0xc 9 10#define MESON_AO_UART_TX_FIFO_EMPTY (1 << 22) 11#define MESON_AO_UART_TX_FIFO_FULL (1 << 21) 12 13 .macro addruart, rp, rv, tmp 14 ldr \rp, =(CONFIG_DEBUG_UART_PHYS) @ physical 15 ldr \rv, =(CONFIG_DEBUG_UART_VIRT) @ virtual 16 .endm 17 18 .macro senduart,rd,rx 19 str \rd, [\rx, #MESON_AO_UART_WFIFO] 20 .endm 21 22 .macro busyuart,rd,rx 231002: ldr \rd, [\rx, #MESON_AO_UART_STATUS] 24 tst \rd, #MESON_AO_UART_TX_FIFO_EMPTY 25 beq 1002b 26 .endm 27 28 .macro waituartcts,rd,rx 29 .endm 30 31 .macro waituarttxrdy,rd,rx 321001: ldr \rd, [\rx, #MESON_AO_UART_STATUS] 33 tst \rd, #MESON_AO_UART_TX_FIFO_FULL 34 bne 1001b 35 .endm