mirror of https://gitee.com/openkylin/linux.git
68 lines
1.7 KiB
ArmAsm
68 lines
1.7 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>
|
|
|
|
#include <mach/serial.h>
|
|
|
|
#define UART_SHIFT 2
|
|
|
|
#if defined(CONFIG_DEBUG_DAVINCI_DMx_UART0)
|
|
#define UART_BASE DAVINCI_UART0_BASE
|
|
#elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART0)
|
|
#define UART_BASE DA8XX_UART0_BASE
|
|
#elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART1)
|
|
#define UART_BASE DA8XX_UART1_BASE
|
|
#elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART2)
|
|
#define UART_BASE DA8XX_UART2_BASE
|
|
#elif defined(CONFIG_DEBUG_DAVINCI_TNETV107X_UART1)
|
|
#define UART_BASE TNETV107X_UART2_BASE
|
|
#define UART_VIRTBASE TNETV107X_UART2_VIRT
|
|
#else
|
|
#error "Select a specifc port for DEBUG_LL"
|
|
#endif
|
|
|
|
#ifndef UART_VIRTBASE
|
|
#define UART_VIRTBASE IO_ADDRESS(UART_BASE)
|
|
#endif
|
|
|
|
.macro addruart, rp, rv, tmp
|
|
ldr \rp, =UART_BASE
|
|
ldr \rv, =UART_VIRTBASE
|
|
.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
|
|
|