| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright (C) 2014 Carlo Caione |
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| 4 | * Carlo Caione <carlo@caione.org> |
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| 5 | */ |
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| 6 | |
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| 7 | #define MESON_AO_UART_WFIFO 0x0 |
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| 8 | #define MESON_AO_UART_STATUS 0xc |
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| 9 | |
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| 10 | #define MESON_AO_UART_TX_FIFO_EMPTY (1 << 22) |
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| 11 | #define MESON_AO_UART_TX_FIFO_FULL (1 << 21) |
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| 12 | |
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| 13 | .macro addruart, rp, rv, tmp |
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| 14 | ldr \rp, =(CONFIG_DEBUG_UART_PHYS) @ physical |
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| 15 | ldr \rv, =(CONFIG_DEBUG_UART_VIRT) @ virtual |
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| 16 | .endm |
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| 17 | |
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| 18 | .macro senduart,rd,rx |
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| 19 | str \rd, [\rx, #MESON_AO_UART_WFIFO] |
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| 20 | .endm |
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| 21 | |
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| 22 | .macro busyuart,rd,rx |
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| 23 | 1002: ldr \rd, [\rx, #MESON_AO_UART_STATUS] |
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| 24 | tst \rd, #MESON_AO_UART_TX_FIFO_EMPTY |
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| 25 | beq 1002b |
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| 26 | .endm |
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| 27 | |
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| 28 | .macro waituartcts,rd,rx |
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| 29 | .endm |
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| 30 | |
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| 31 | .macro waituarttxrdy,rd,rx |
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| 32 | 1001: ldr \rd, [\rx, #MESON_AO_UART_STATUS] |
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| 33 | tst \rd, #MESON_AO_UART_TX_FIFO_FULL |
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| 34 | bne 1001b |
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| 35 | .endm |
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| 36 | |
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