arch/arm/plat-samsung/include/plat/debug-macro.S

   1 /* arch/arm/plat-samsung/include/plat/debug-macro.S
   2  *
   3  * Copyright 2005, 2007 Simtec Electronics
   4  *      http://armlinux.simtec.co.uk/
   5  *      Ben Dooks <ben@simtec.co.uk>
   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 #include <plat/regs-serial.h>
  13
  14 /* The S5PV210/S5PC110 implementations are as belows. */
  15
  16         .macro fifo_level_s5pv210 rd, rx
  17                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  18                 and     \rd, \rd, #S5PV210_UFSTAT_TXMASK
  19         .endm
  20
  21         .macro  fifo_full_s5pv210 rd, rx
  22                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  23                 tst     \rd, #S5PV210_UFSTAT_TXFULL
  24         .endm
  25
  26 /* The S3C2440 implementations are used by default as they are the
  27  * most widely re-used */
  28
  29         .macro fifo_level_s3c2440 rd, rx
  30                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  31                 and     \rd, \rd, #S3C2440_UFSTAT_TXMASK
  32         .endm
  33
  34 #ifndef fifo_level
  35 #define fifo_level fifo_level_s3c2440
  36 #endif
  37
  38         .macro  fifo_full_s3c2440 rd, rx
  39                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  40                 tst     \rd, #S3C2440_UFSTAT_TXFULL
  41         .endm
  42
  43 #ifndef fifo_full
  44 #define fifo_full fifo_full_s3c2440
  45 #endif
  46
  47         .macro  senduart,rd,rx
  48                 strb    \rd, [\rx, # S3C2410_UTXH ]
  49         .endm
  50
  51         .macro  busyuart, rd, rx
  52                 ldr     \rd, [ \rx, # S3C2410_UFCON ]
  53                 tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
  54                 beq     1001f                           @
  55                 @ FIFO enabled...
  56 1003:
  57                 fifo_full \rd, \rx
  58                 bne     1003b
  59                 b       1002f
  60
  61 1001:
  62                 @ busy waiting for non fifo
  63                 ldr     \rd, [ \rx, # S3C2410_UTRSTAT ]
  64                 tst     \rd, #S3C2410_UTRSTAT_TXFE
  65                 beq     1001b
  66
  67 1002:           @ exit busyuart
  68         .endm
  69
  70         .macro  waituart,rd,rx
  71                 ldr     \rd, [ \rx, # S3C2410_UFCON ]
  72                 tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
  73                 beq     1001f                           @
  74                 @ FIFO enabled...
  75 1003:
  76                 fifo_level \rd, \rx
  77                 teq     \rd, #0
  78                 bne     1003b
  79                 b       1002f
  80 1001:
  81                 @ idle waiting for non fifo
  82                 ldr     \rd, [ \rx, # S3C2410_UTRSTAT ]
  83                 tst     \rd, #S3C2410_UTRSTAT_TXFE
  84                 beq     1001b
  85
  86 1002:           @ exit busyuart
  87         .endm