forked from Minki/linux
5a5a6451ac
Linux may be used without MMU on atmel SoCs, fix debug in this configuration. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
53 lines
1.5 KiB
ArmAsm
53 lines
1.5 KiB
ArmAsm
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#if defined(CONFIG_AT91_DEBUG_LL_DBGU0)
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#define AT91_DBGU 0xfffff200 /* AT91_BASE_DBGU0 */
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#elif defined(CONFIG_AT91_DEBUG_LL_DBGU1)
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#define AT91_DBGU 0xffffee00 /* AT91_BASE_DBGU1 */
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#else
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/* On sama5d4, use USART3 as low level serial console */
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#define AT91_DBGU 0xfc00c000 /* SAMA5D4_BASE_USART3 */
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#endif
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#ifdef CONFIG_MMU
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#define AT91_IO_P2V(x) ((x) - 0x01000000)
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#else
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#define AT91_IO_P2V(x) (x)
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#endif
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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, =AT91_DBGU @ System peripherals (phys address)
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ldr \rv, =AT91_IO_P2V(AT91_DBGU) @ 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 waituart,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 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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