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   1 /* linux/include/asm-arm/arch-ebsa285/debug-macro.S
   2  *
   3  * Debugging macro include header
   4  *
   5  *  Copyright (C) 1994-1999 Russell King
   6  *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12 */
  13
  14 #include <asm/hardware/dec21285.h>
  15
  16 #ifndef CONFIG_DEBUG_DC21285_PORT
  17         /* For NetWinder debugging */
  18                 .macro  addruart,rx
  19                 mrc     p15, 0, \rx, c1, c0
  20                 tst     \rx, #1                 @ MMU enabled?
  21                 moveq   \rx, #0x7c000000        @ physical
  22                 movne   \rx, #0xff000000        @ virtual
  23                 orr     \rx, \rx, #0x000003f8
  24                 .endm
  25
  26                 .macro  senduart,rd,rx
  27                 strb    \rd, [\rx]
  28                 .endm
  29
  30                 .macro  busyuart,rd,rx
  31 1002:           ldrb    \rd, [\rx, #0x5]
  32                 and     \rd, \rd, #0x60
  33                 teq     \rd, #0x60
  34                 bne     1002b
  35                 .endm
  36
  37                 .macro  waituart,rd,rx
  38 1001:           ldrb    \rd, [\rx, #0x6]
  39                 tst     \rd, #0x10
  40                 beq     1001b
  41                 .endm
  42 #else
  43         /* For EBSA285 debugging */
  44                 .equ    dc21285_high, ARMCSR_BASE & 0xff000000
  45                 .equ    dc21285_low,  ARMCSR_BASE & 0x00ffffff
  46
  47                 .macro  addruart,rx
  48                 mrc     p15, 0, \rx, c1, c0
  49                 tst     \rx, #1                 @ MMU enabled?
  50                 moveq   \rx, #0x42000000
  51                 movne   \rx, #dc21285_high
  52                 .if     dc21285_low
  53                 orrne   \rx, \rx, #dc21285_low
  54                 .endif
  55                 .endm
  56
  57                 .macro  senduart,rd,rx
  58                 str     \rd, [\rx, #0x160]      @ UARTDR
  59                 .endm
  60
  61                 .macro  busyuart,rd,rx
  62 1001:           ldr     \rd, [\rx, #0x178]      @ UARTFLG
  63                 tst     \rd, #1 << 3
  64                 bne     1001b
  65                 .endm
  66
  67                 .macro  waituart,rd,rx
  68                 .endm
  69 #endif