include/debug/at91.S

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  *  Copyright (C) 2003-2005 SAN People
0004  *
0005  * Debugging macro include header
0006 */
0007
0008 #define AT91_DBGU_SR        (0x14)  /* Status Register */
0009 #define AT91_DBGU_THR       (0x1c)  /* Transmitter Holding Register */
0010 #define AT91_DBGU_TXRDY     (1 << 1)    /* Transmitter Ready */
0011 #define AT91_DBGU_TXEMPTY   (1 << 9)    /* Transmitter Empty */
0012
0013     .macro  addruart, rp, rv, tmp
0014     ldr \rp, =CONFIG_DEBUG_UART_PHYS        @ System peripherals (phys address)
0015     ldr \rv, =CONFIG_DEBUG_UART_VIRT        @ System peripherals (virt address)
0016     .endm
0017
0018     .macro  senduart,rd,rx
0019     strb    \rd, [\rx, #(AT91_DBGU_THR)]        @ Write to Transmitter Holding Register
0020     .endm
0021
0022     .macro  waituarttxrdy,rd,rx
0023 1001:   ldr \rd, [\rx, #(AT91_DBGU_SR)]     @ Read Status Register
0024     tst \rd, #AT91_DBGU_TXRDY           @ DBGU_TXRDY = 1 when ready to transmit
0025     beq 1001b
0026     .endm
0027
0028     .macro  waituartcts,rd,rx
0029     .endm
0030
0031     .macro  busyuart,rd,rx
0032 1001:   ldr \rd, [\rx, #(AT91_DBGU_SR)]     @ Read Status Register
0033     tst \rd, #AT91_DBGU_TXEMPTY         @ DBGU_TXEMPTY = 1 when transmission complete
0034     beq 1001b
0035     .endm
0036