| /* SPDX-License-Identifier: GPL-2.0-only */ | |
| /* | |
| * Broadcom BCM63xx low-level UART debug | |
| * | |
| * Copyright (C) 2014 Broadcom Corporation | |
| */ | |
| #include <linux/serial_bcm63xx.h> | |
| .macro addruart, rp, rv, tmp | |
| ldr \rp, =CONFIG_DEBUG_UART_PHYS | |
| ldr \rv, =CONFIG_DEBUG_UART_VIRT | |
| .endm | |
| .macro senduart, rd, rx | |
| /* word access do not work */ | |
| strb \rd, [\rx, #UART_FIFO_REG] | |
| .endm | |
| .macro waituart, rd, rx | |
| 1001: ldr \rd, [\rx, #UART_IR_REG] | |
| tst \rd, #(1 << UART_IR_TXEMPTY) | |
| beq 1001b | |
| .endm | |
| .macro busyuart, rd, rx | |
| 1002: ldr \rd, [\rx, #UART_IR_REG] | |
| tst \rd, #(1 << UART_IR_TXTRESH) | |
| beq 1002b | |
| .endm |