| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2014 Carlo Caione |
| * Carlo Caione <carlo@caione.org> |
| */ |
| |
| #define MESON_AO_UART_WFIFO 0x0 |
| #define MESON_AO_UART_STATUS 0xc |
| |
| #define MESON_AO_UART_TX_FIFO_EMPTY (1 << 22) |
| #define MESON_AO_UART_TX_FIFO_FULL (1 << 21) |
| |
| .macro addruart, rp, rv, tmp |
| ldr \rp, =(CONFIG_DEBUG_UART_PHYS) @ physical |
| ldr \rv, =(CONFIG_DEBUG_UART_VIRT) @ virtual |
| .endm |
| |
| .macro senduart,rd,rx |
| str \rd, [\rx, #MESON_AO_UART_WFIFO] |
| .endm |
| |
| .macro busyuart,rd,rx |
| 1002: ldr \rd, [\rx, #MESON_AO_UART_STATUS] |
| tst \rd, #MESON_AO_UART_TX_FIFO_EMPTY |
| beq 1002b |
| .endm |
| |
| .macro waituart,rd,rx |
| 1001: ldr \rd, [\rx, #MESON_AO_UART_STATUS] |
| tst \rd, #MESON_AO_UART_TX_FIFO_FULL |
| bne 1001b |
| .endm |
