1/* 2 * Copyright (C) 2003-2005 SAN People 3 * 4 * Debugging macro include header 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10*/ 11 12#if defined(CONFIG_AT91_DEBUG_LL_DBGU0) 13#define AT91_DBGU 0xfffff200 /* AT91_BASE_DBGU0 */ 14#elif defined(CONFIG_AT91_DEBUG_LL_DBGU1) 15#define AT91_DBGU 0xffffee00 /* AT91_BASE_DBGU1 */ 16#else 17/* On sama5d4, use USART3 as low level serial console */ 18#define AT91_DBGU 0xfc00c000 /* SAMA5D4_BASE_USART3 */ 19#endif 20 21/* Keep in sync with mach-at91/include/mach/hardware.h */ 22#define AT91_IO_P2V(x) ((x) - 0x01000000) 23 24#define AT91_DBGU_SR (0x14) /* Status Register */ 25#define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */ 26#define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */ 27#define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */ 28 29 .macro addruart, rp, rv, tmp 30 ldr \rp, =AT91_DBGU @ System peripherals (phys address) 31 ldr \rv, =AT91_IO_P2V(AT91_DBGU) @ System peripherals (virt address) 32 .endm 33 34 .macro senduart,rd,rx 35 strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register 36 .endm 37 38 .macro waituart,rd,rx 391001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register 40 tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit 41 beq 1001b 42 .endm 43 44 .macro busyuart,rd,rx 451001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register 46 tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete 47 beq 1001b 48 .endm 49 50