50 lines
1.5 KiB
ArmAsm
50 lines
1.5 KiB
ArmAsm
/*
|
|
* 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
|
|
|