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- /*
- * 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
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