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35 lines
771 B
35 lines
771 B
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2014 Carlo Caione |
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* Carlo Caione <carlo@caione.org> |
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*/ |
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#define MESON_AO_UART_WFIFO 0x0 |
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#define MESON_AO_UART_STATUS 0xc |
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#define MESON_AO_UART_TX_FIFO_EMPTY (1 << 22) |
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#define MESON_AO_UART_TX_FIFO_FULL (1 << 21) |
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.macro addruart, rp, rv, tmp |
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ldr \rp, =(CONFIG_DEBUG_UART_PHYS) @ physical |
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ldr \rv, =(CONFIG_DEBUG_UART_VIRT) @ virtual |
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.endm |
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.macro senduart,rd,rx |
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str \rd, [\rx, #MESON_AO_UART_WFIFO] |
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.endm |
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.macro busyuart,rd,rx |
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1002: ldr \rd, [\rx, #MESON_AO_UART_STATUS] |
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tst \rd, #MESON_AO_UART_TX_FIFO_EMPTY |
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beq 1002b |
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.endm |
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.macro waituartcts,rd,rx |
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.endm |
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.macro waituarttxrdy,rd,rx |
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1001: ldr \rd, [\rx, #MESON_AO_UART_STATUS] |
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tst \rd, #MESON_AO_UART_TX_FIFO_FULL |
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bne 1001b |
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.endm
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