root/arch/arm/include/debug/icedcc.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  arch/arm/include/debug/icedcc.S
   4  *
   5  *  Copyright (C) 1994-1999 Russell King
   6  */
   7 
   8                 @@ debug using ARM EmbeddedICE DCC channel
   9 
  10                 .macro  addruart, rp, rv, tmp
  11                 .endm
  12 
  13 #if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
  14 
  15                 .macro  senduart, rd, rx
  16                 mcr     p14, 0, \rd, c0, c5, 0
  17                 .endm
  18 
  19                 .macro  busyuart, rd, rx
  20 1001:
  21                 mrc     p14, 0, \rx, c0, c1, 0
  22                 tst     \rx, #0x20000000
  23                 beq     1001b
  24                 .endm
  25 
  26                 .macro  waituart, rd, rx
  27                 mov     \rd, #0x2000000
  28 1001:
  29                 subs    \rd, \rd, #1
  30                 bmi     1002f
  31                 mrc     p14, 0, \rx, c0, c1, 0
  32                 tst     \rx, #0x20000000
  33                 bne     1001b
  34 1002:
  35                 .endm
  36 
  37 #elif defined(CONFIG_CPU_XSCALE)
  38 
  39                 .macro  senduart, rd, rx
  40                 mcr     p14, 0, \rd, c8, c0, 0
  41                 .endm
  42 
  43                 .macro  busyuart, rd, rx
  44 1001:
  45                 mrc     p14, 0, \rx, c14, c0, 0
  46                 tst     \rx, #0x10000000
  47                 beq     1001b
  48                 .endm
  49 
  50                 .macro  waituart, rd, rx
  51                 mov     \rd, #0x10000000
  52 1001:
  53                 subs    \rd, \rd, #1
  54                 bmi     1002f
  55                 mrc     p14, 0, \rx, c14, c0, 0
  56                 tst     \rx, #0x10000000
  57                 bne     1001b
  58 1002:
  59                 .endm
  60 
  61 #else
  62 
  63                 .macro  senduart, rd, rx
  64                 mcr     p14, 0, \rd, c1, c0, 0
  65                 .endm
  66 
  67                 .macro  busyuart, rd, rx
  68 1001:
  69                 mrc     p14, 0, \rx, c0, c0, 0
  70                 tst     \rx, #2
  71                 beq     1001b
  72 
  73                 .endm
  74 
  75                 .macro  waituart, rd, rx
  76                 mov     \rd, #0x2000000
  77 1001:
  78                 subs    \rd, \rd, #1
  79                 bmi     1002f
  80                 mrc     p14, 0, \rx, c0, c0, 0
  81                 tst     \rx, #2
  82                 bne     1001b
  83 1002:
  84                 .endm
  85 
  86 #endif  /* CONFIG_CPU_V6 */