arch/arm/include/debug/digicolor.S

   1 /*
   2  * Debugging macro include header for Conexant Digicolor USART
   3  *
   4  * Copyright (C) 2014 Paradox Innovation Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10 */
  11
  12 #define UA0_STATUS      0x0742
  13 #define UA0_EMI_REC     0x0744
  14
  15 #define UA0_STATUS_TX_READY     0x40
  16
  17 #ifdef CONFIG_DEBUG_UART_PHYS
  18                 .macro  addruart, rp, rv, tmp
  19                 ldr     \rp, =CONFIG_DEBUG_UART_PHYS
  20                 ldr     \rv, =CONFIG_DEBUG_UART_VIRT
  21                 .endm
  22 #endif
  23
  24                 .macro  senduart,rd,rx
  25                 strb    \rd, [\rx, #UA0_EMI_REC]
  26                 .endm
  27
  28                 .macro  waituart,rd,rx
  29                 .endm
  30
  31         .macro  busyuart,rd,rx
  32 1001:           ldrb    \rd, [\rx, #UA0_STATUS]
  33                 tst     \rd, #UA0_STATUS_TX_READY
  34                 beq     1001b
  35                 .endm