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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 waituarttxrdy,rd,rx
| .endm
|
| .macro waituartcts,rd,rx
| 1001: load \rd, [\rx, #UART_MSR << UART_SHIFT]
| tst \rd, #UART_MSR_CTS
| beq 1001b
| .endm
|
|
