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  waituartcts, rd, rx
  27                 .endm
  28
  29                 .macro  waituarttxrdy, rd, rx
  30                 mov     \rd, #0x2000000
  31 1001:
  32                 subs    \rd, \rd, #1
  33                 bmi     1002f
  34                 mrc     p14, 0, \rx, c0, c1, 0
  35                 tst     \rx, #0x20000000
  36                 bne     1001b
  37 1002:
  38                 .endm
  39
  40 #elif defined(CONFIG_CPU_XSCALE)
  41
  42                 .macro  senduart, rd, rx
  43                 mcr     p14, 0, \rd, c8, c0, 0
  44                 .endm
  45
  46                 .macro  busyuart, rd, rx
  47 1001:
  48                 mrc     p14, 0, \rx, c14, c0, 0
  49                 tst     \rx, #0x10000000
  50                 beq     1001b
  51                 .endm
  52
  53                 .macro  waituartcts, rd, rx
  54                 .endm
  55
  56                 .macro  waituarttxrdy, rd, rx
  57                 mov     \rd, #0x10000000
  58 1001:
  59                 subs    \rd, \rd, #1
  60                 bmi     1002f
  61                 mrc     p14, 0, \rx, c14, c0, 0
  62                 tst     \rx, #0x10000000
  63                 bne     1001b
  64 1002:
  65                 .endm
  66
  67 #else
  68
  69                 .macro  senduart, rd, rx
  70                 mcr     p14, 0, \rd, c1, c0, 0
  71                 .endm
  72
  73                 .macro  busyuart, rd, rx
  74 1001:
  75                 mrc     p14, 0, \rx, c0, c0, 0
  76                 tst     \rx, #2
  77                 beq     1001b
  78
  79                 .endm
  80
  81                 .macro  waituartcts, rd, rx
  82                 .endm
  83
  84                 .macro  waituarttxrdy, rd, rx
  85                 mov     \rd, #0x2000000
  86 1001:
  87                 subs    \rd, \rd, #1
  88                 bmi     1002f
  89                 mrc     p14, 0, \rx, c0, c0, 0
  90                 tst     \rx, #2
  91                 bne     1001b
  92 1002:
  93                 .endm
  94
  95 #endif  /* CONFIG_CPU_V6 */