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#ifdef CONFIG_MMU 22#define AT91_IO_P2V(x) ((x) - 0x01000000) 23#else 24#define AT91_IO_P2V(x) (x) 25#endif 26 27#define AT91_DBGU_SR (0x14) /* Status Register */ 28#define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */ 29#define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */ 30#define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */ 31 32 .macro addruart, rp, rv, tmp 33 ldr \rp, =AT91_DBGU @ System peripherals (phys address) 34 ldr \rv, =AT91_IO_P2V(AT91_DBGU) @ System peripherals (virt address) 35 .endm 36 37 .macro senduart,rd,rx 38 strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register 39 .endm 40 41 .macro waituart,rd,rx 421001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register 43 tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit 44 beq 1001b 45 .endm 46 47 .macro busyuart,rd,rx 481001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register 49 tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete 50 beq 1001b 51 .endm 52 53