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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* arch/arm/include/debug/8250.S
*
* Copyright (C) 1994-2013 Russell King
*/
#include <linux/serial_reg.h>
.macro addruart, rp, rv, tmp
ldr \rp, =CONFIG_DEBUG_UART_PHYS
ldr \rv, =CONFIG_DEBUG_UART_VIRT
.endm
#ifdef CONFIG_DEBUG_UART_8250_WORD
.macro store, rd, rx:vararg
ARM_BE8(rev \rd, \rd)
str \rd, \rx
ARM_BE8(rev \rd, \rd)
.endm
.macro load, rd, rx:vararg
ldr \rd, \rx
ARM_BE8(rev \rd, \rd)
.endm
#else
.macro store, rd, rx:vararg
strb \rd, \rx
.endm
.macro load, rd, rx:vararg
ldrb \rd, \rx
.endm
#endif
#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
.macro senduart,rd,rx
store \rd, [\rx, #UART_TX << UART_SHIFT]
.endm
.macro busyuart,rd,rx
1002: load \rd, [\rx, #UART_LSR << UART_SHIFT]
and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
bne 1002b
.endm
.macro waituart,rd,rx
#ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL
1001: load \rd, [\rx, #UART_MSR << UART_SHIFT]
tst \rd, #UART_MSR_CTS
beq 1001b
#endif
.endm
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