2 * arch/arm/include/debug/8250.S
4 * Copyright (C) 1994-2013 Russell King
6 * SPDX-License-Identifier: GPL-2.0+
8 #include <linux/serial_reg.h>
10 .macro addruart, rp, rv, tmp
11 ldr \rp, =CONFIG_DEBUG_UART_PHYS
12 ldr \rv, =CONFIG_DEBUG_UART_VIRT
15 #ifdef CONFIG_DEBUG_UART_8250_WORD
16 .macro store, rd, rx:vararg
20 .macro load, rd, rx:vararg
24 .macro store, rd, rx:vararg
28 .macro load, rd, rx:vararg
33 #define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
36 store \rd, [\rx, #UART_TX << UART_SHIFT]
40 1002: load \rd, [\rx, #UART_LSR << UART_SHIFT]
41 and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
42 teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
47 #ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL
48 1001: load \rd, [\rx, #UART_MSR << UART_SHIFT]
49 tst \rd, #UART_MSR_CTS