37 lines
1.0 KiB
ArmAsm
37 lines
1.0 KiB
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2003-2005 SAN People
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*
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* Debugging macro include header
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*/
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#define AT91_DBGU_SR (0x14) /* Status Register */
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#define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */
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#define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */
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#define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */
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.macro addruart, rp, rv, tmp
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ldr \rp, =CONFIG_DEBUG_UART_PHYS @ System peripherals (phys address)
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ldr \rv, =CONFIG_DEBUG_UART_VIRT @ System peripherals (virt address)
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.endm
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.macro senduart,rd,rx
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strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register
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.endm
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.macro waituarttxrdy,rd,rx
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1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register
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tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit
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beq 1001b
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.endm
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.macro waituartcts,rd,rx
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.endm
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.macro busyuart,rd,rx
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1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register
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tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete
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beq 1001b
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.endm
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