| /* |
| * 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 |
| |
