kernel/arch/arm/include/debug/netx.S

   1 /*
   2  * Debugging macro include header
   3  *
   4  *  Copyright (C) 1994-1999 Russell King
   5  *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11 */
  12
  13 #define UART_DATA 0
  14 #define UART_FLAG 0x18
  15 #define UART_FLAG_BUSY (1 << 3)
  16
  17                 .macro  addruart, rp, rv, tmp
  18                 ldr     \rp, =CONFIG_DEBUG_UART_PHYS
  19                 ldr     \rv, =CONFIG_DEBUG_UART_VIRT
  20                 .endm
  21
  22                 .macro  senduart,rd,rx
  23                 str     \rd, [\rx, #UART_DATA]
  24                 .endm
  25
  26                 .macro  busyuart,rd,rx
  27 1002:           ldr     \rd, [\rx, #UART_FLAG]
  28                 tst     \rd, #UART_FLAG_BUSY
  29                 bne     1002b
  30                 .endm
  31
  32                 .macro  waituart,rd,rx
  33 1001:           ldr     \rd, [\rx, #UART_FLAG]
  34                 tst     \rd, #UART_FLAG_BUSY
  35                 bne     1001b
  36                 .endm