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#ifdef CONFIG_MMU 13#define AT91_IO_P2V(x) ((x) - 0x01000000) 14#else 15#define AT91_IO_P2V(x) (x) 16#endif 17 18#define AT91_DEBUG_UART_VIRT AT91_IO_P2V(CONFIG_DEBUG_UART_PHYS) 19 20#define AT91_DBGU_SR (0x14) /* Status Register */ 21#define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */ 22#define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */ 23#define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */ 24 25 .macro addruart, rp, rv, tmp 26 ldr \rp, =CONFIG_DEBUG_UART_PHYS @ System peripherals (phys address) 27 ldr \rv, =AT91_DEBUG_UART_VIRT @ System peripherals (virt address) 28 .endm 29 30 .macro senduart,rd,rx 31 strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register 32 .endm 33 34 .macro waituart,rd,rx 351001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register 36 tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit 37 beq 1001b 38 .endm 39 40 .macro busyuart,rd,rx 411001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register 42 tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete 43 beq 1001b 44 .endm 45 46