| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Broadcom BCM63xx low-level UART debug |
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| 4 | * |
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| 5 | * Copyright (C) 2014 Broadcom Corporation |
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| 6 | */ |
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| 7 | |
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| 8 | #include <linux/serial_bcm63xx.h> |
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| 9 | |
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| 10 | .macro addruart, rp, rv, tmp |
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| 11 | ldr \rp, =CONFIG_DEBUG_UART_PHYS |
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| 12 | ldr \rv, =CONFIG_DEBUG_UART_VIRT |
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| 13 | .endm |
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| 14 | |
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| 15 | .macro senduart, rd, rx |
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| 16 | /* word access do not work */ |
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| 17 | strb \rd, [\rx, #UART_FIFO_REG] |
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| 18 | .endm |
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| 19 | |
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| 20 | .macro waituarttxrdy, rd, rx |
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| 21 | 1001: ldr \rd, [\rx, #UART_IR_REG] |
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| 22 | tst \rd, #(1 << UART_IR_TXEMPTY) |
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| 23 | beq 1001b |
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| 24 | .endm |
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| 25 | |
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| 26 | .macro waituartcts, rd, rx |
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| 27 | .endm |
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| 28 | |
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| 29 | .macro busyuart, rd, rx |
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| 30 | 1002: ldr \rd, [\rx, #UART_IR_REG] |
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| 31 | tst \rd, #(1 << UART_IR_TXTRESH) |
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| 32 | beq 1002b |
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| 33 | .endm |
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| 34 | |
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