kernel/arch/arm/include/debug/pl01x.S

   1 /* arch/arm/include/debug/pl01x.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 #include <linux/amba/serial.h>
  14
  15 #ifdef CONFIG_DEBUG_ZTE_ZX
  16 #undef UART01x_DR
  17 #undef UART01x_FR
  18 #define UART01x_DR     0x04
  19 #define UART01x_FR     0x14
  20 #endif
  21
  22 #ifdef CONFIG_DEBUG_UART_PHYS
  23                 .macro  addruart, rp, rv, tmp
  24                 ldr     \rp, =CONFIG_DEBUG_UART_PHYS
  25                 ldr     \rv, =CONFIG_DEBUG_UART_VIRT
  26                 .endm
  27 #endif
  28
  29                 .macro  senduart,rd,rx
  30                 strb    \rd, [\rx, #UART01x_DR]
  31                 .endm
  32
  33                 .macro  waituart,rd,rx
  34 1001:           ldr     \rd, [\rx, #UART01x_FR]
  35  ARM_BE8(       rev     \rd, \rd )
  36                 tst     \rd, #UART01x_FR_TXFF
  37                 bne     1001b
  38                 .endm
  39
  40                 .macro  busyuart,rd,rx
  41 1001:           ldr     \rd, [\rx, #UART01x_FR]
  42  ARM_BE8(       rev     \rd, \rd )
  43                 tst     \rd, #UART01x_FR_BUSY
  44                 bne     1001b
  45                 .endm