49 lines
1.2 KiB
ArmAsm
49 lines
1.2 KiB
ArmAsm
/*
|
|
* Debugging macro for DaVinci
|
|
*
|
|
* Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
|
|
*
|
|
* 2007 (c) MontaVista Software, Inc. This file is licensed under
|
|
* the terms of the GNU General Public License version 2. This program
|
|
* is licensed "as is" without any warranty of any kind, whether express
|
|
* or implied.
|
|
*/
|
|
|
|
/* Modifications
|
|
* Jan 2009 Chaithrika U S Added senduart, busyuart, waituart
|
|
* macros, based on debug-8250.S file
|
|
* but using 32-bit accesses required for
|
|
* some davinci devices.
|
|
*/
|
|
|
|
#include <linux/serial_reg.h>
|
|
#define UART_SHIFT 2
|
|
|
|
.macro addruart, rx
|
|
mrc p15, 0, \rx, c1, c0
|
|
tst \rx, #1 @ MMU enabled?
|
|
moveq \rx, #0x01000000 @ physical base address
|
|
movne \rx, #0xfe000000 @ virtual base
|
|
orr \rx, \rx, #0x00c20000 @ UART 0
|
|
.endm
|
|
|
|
.macro senduart,rd,rx
|
|
str \rd, [\rx, #UART_TX << UART_SHIFT]
|
|
.endm
|
|
|
|
.macro busyuart,rd,rx
|
|
1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
|
|
and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
|
|
teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
|
|
bne 1002b
|
|
.endm
|
|
|
|
.macro waituart,rd,rx
|
|
#ifdef FLOW_CONTROL
|
|
1001: ldr \rd, [\rx, #UART_MSR << UART_SHIFT]
|
|
tst \rd, #UART_MSR_CTS
|
|
beq 1001b
|
|
#endif
|
|
.endm
|
|
|