1/* 2 * arch/arm/mach-at91/include/mach/debug-macro.S 3 * 4 * Copyright (C) 2003-2005 SAN People 5 * 6 * Debugging macro include header 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12*/ 13 14#include <mach/hardware.h> 15#include <mach/at91_dbgu.h> 16 17#if defined(CONFIG_AT91_DEBUG_LL_DBGU0) 18#define AT91_DBGU AT91_BASE_DBGU0 19#elif defined(CONFIG_AT91_DEBUG_LL_DBGU1) 20#define AT91_DBGU AT91_BASE_DBGU1 21#else 22/* On sama5d4, use USART3 as low level serial console */ 23#define AT91_DBGU SAMA5D4_BASE_USART3 24#endif 25 26 .macro addruart, rp, rv, tmp 27 ldr \rp, =AT91_DBGU @ System peripherals (phys address) 28 ldr \rv, =AT91_IO_P2V(AT91_DBGU) @ System peripherals (virt address) 29 .endm 30 31 .macro senduart,rd,rx 32 strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register 33 .endm 34 35 .macro waituart,rd,rx 361001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register 37 tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit 38 beq 1001b 39 .endm 40 41 .macro busyuart,rd,rx 421001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register 43 tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete 44 beq 1001b 45 .endm 46 47