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Text File  |  2008-12-24  |  719 b   |  30 lines
  1. /*
  2.  * arch/arm/include/asm/hardware/debug-8250.S
  3.  *
  4.  *  Copyright (C) 1994-1999 Russell King
  5.  *
  6.  * This program is free software; you can redistribute it and/or modify
  7.  * it under the terms of the GNU General Public License version 2 as
  8.  * published by the Free Software Foundation.
  9.  */
  10. #include <linux/serial_reg.h>
  11.  
  12.         .macro    senduart,rd,rx
  13.         strb    \rd, [\rx, #UART_TX << UART_SHIFT]
  14.         .endm
  15.  
  16.         .macro    busyuart,rd,rx
  17. 1002:        ldrb    \rd, [\rx, #UART_LSR << UART_SHIFT]
  18.         and    \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
  19.         teq    \rd, #UART_LSR_TEMT | UART_LSR_THRE
  20.         bne    1002b
  21.         .endm
  22.  
  23.         .macro    waituart,rd,rx
  24. #ifdef FLOW_CONTROL
  25. 1001:        ldrb    \rd, [\rx, #UART_MSR << UART_SHIFT]
  26.         tst    \rd, #UART_MSR_CTS
  27.         beq    1001b
  28. #endif
  29.         .endm
  30.