| /* |
| * Copyright (C) 2003-2005 SAN People |
| * |
| * Debugging macro include header |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| |
| #if defined(CONFIG_AT91_DEBUG_LL_DBGU0) |
| #define AT91_DBGU 0xfffff200 /* AT91_BASE_DBGU0 */ |
| #elif defined(CONFIG_AT91_DEBUG_LL_DBGU1) |
| #define AT91_DBGU 0xffffee00 /* AT91_BASE_DBGU1 */ |
| #else |
| /* On sama5d4, use USART3 as low level serial console */ |
| #define AT91_DBGU 0xfc00c000 /* SAMA5D4_BASE_USART3 */ |
| #endif |
| |
| /* Keep in sync with mach-at91/include/mach/hardware.h */ |
| #define AT91_IO_P2V(x) ((x) - 0x01000000) |
| |
| #define AT91_DBGU_SR (0x14) /* Status Register */ |
| #define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */ |
| #define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */ |
| #define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */ |
| |
| .macro addruart, rp, rv, tmp |
| ldr \rp, =AT91_DBGU @ System peripherals (phys address) |
| ldr \rv, =AT91_IO_P2V(AT91_DBGU) @ System peripherals (virt address) |
| .endm |
| |
| .macro senduart,rd,rx |
| strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register |
| .endm |
| |
| .macro waituart,rd,rx |
| 1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register |
| tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit |
| beq 1001b |
| .endm |
| |
| .macro busyuart,rd,rx |
| 1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register |
| tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete |
| beq 1001b |
| .endm |
| |
