1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * arch/arm/include/debug/8250.S
 4 *
 5 *  Copyright (C) 1994-2013 Russell King
 6 */
 7#include <linux/serial_reg.h>
 8
 9		.macro	addruart, rp, rv, tmp
10		ldr	\rp, =CONFIG_DEBUG_UART_PHYS
11		ldr	\rv, =CONFIG_DEBUG_UART_VIRT
12		.endm
13
14#ifdef CONFIG_DEBUG_UART_8250_WORD
15		.macro	store, rd, rx:vararg
16	 ARM_BE8(rev \rd, \rd)
17		str	\rd, \rx
18	 ARM_BE8(rev \rd, \rd)
19		.endm
20
21		.macro	load, rd, rx:vararg
22		ldr	\rd, \rx
23	ARM_BE8(rev \rd, \rd)
24		.endm
25#else
26		.macro	store, rd, rx:vararg
27		strb	\rd, \rx
28		.endm
29
30		.macro	load, rd, rx:vararg
31		ldrb	\rd, \rx
32		.endm
33#endif
34
35#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
36
37		.macro	senduart,rd,rx
38		store	\rd, [\rx, #UART_TX << UART_SHIFT]
39		.endm
40
41		.macro	busyuart,rd,rx
421002:		load	\rd, [\rx, #UART_LSR << UART_SHIFT]
43		and	\rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
44		teq	\rd, #UART_LSR_TEMT | UART_LSR_THRE
45		bne	1002b
46		.endm
47
48		.macro	waituarttxrdy,rd,rx
49		.endm
50
51		.macro	waituartcts,rd,rx
521001:		load	\rd, [\rx, #UART_MSR << UART_SHIFT]
53		tst	\rd, #UART_MSR_CTS
54		beq	1001b
55		.endm

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * arch/arm/include/debug/8250.S
 4 *
 5 *  Copyright (C) 1994-2013 Russell King
 6 */
 7#include <linux/serial_reg.h>
 8
 9		.macro	addruart, rp, rv, tmp
10		ldr	\rp, =CONFIG_DEBUG_UART_PHYS
11		ldr	\rv, =CONFIG_DEBUG_UART_VIRT
12		.endm
13
14#ifdef CONFIG_DEBUG_UART_8250_WORD
15		.macro	store, rd, rx:vararg
16	 ARM_BE8(rev \rd, \rd)
17		str	\rd, \rx
18	 ARM_BE8(rev \rd, \rd)
19		.endm
20
21		.macro	load, rd, rx:vararg
22		ldr	\rd, \rx
23	ARM_BE8(rev \rd, \rd)
24		.endm
25#else
26		.macro	store, rd, rx:vararg
27		strb	\rd, \rx
28		.endm
29
30		.macro	load, rd, rx:vararg
31		ldrb	\rd, \rx
32		.endm
33#endif
34
35#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
36
37		.macro	senduart,rd,rx
38		store	\rd, [\rx, #UART_TX << UART_SHIFT]
39		.endm
40
41		.macro	busyuart,rd,rx
421002:		load	\rd, [\rx, #UART_LSR << UART_SHIFT]
43		and	\rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
44		teq	\rd, #UART_LSR_TEMT | UART_LSR_THRE
45		bne	1002b
46		.endm
47
48		.macro	waituarttxrdy,rd,rx
49		.endm
50
51		.macro	waituartcts,rd,rx
521001:		load	\rd, [\rx, #UART_MSR << UART_SHIFT]
53		tst	\rd, #UART_MSR_CTS
54		beq	1001b
55		.endm