arch/unicore32/include/mach/ocd.h

   1 /*
   2  * linux/arch/unicore32/include/mach/ocd.h
   3  *
   4  * Code specific to PKUnity SoC and UniCore ISA
   5  *
   6  * Copyright (C) 2001-2010 GUAN Xue-tao
   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 #ifndef __MACH_PUV3_OCD_H__
  14 #define __MACH_PUV3_OCD_H__
  15
  16 #if defined(CONFIG_DEBUG_OCD)
  17 static inline void ocd_putc(unsigned int c)
  18 {
  19         int status, i = 0x2000000;
  20
  21         do {
  22                 if (--i < 0)
  23                         return;
  24
  25                 asm volatile ("movc %0, p1.c0, #0" : "=r" (status));
  26         } while (status & 2);
  27
  28         asm("movc p1.c1, %0, #1" : : "r" (c));
  29 }
  30
  31 #define putc(ch)        ocd_putc(ch)
  32 #else
  33 #define putc(ch)
  34 #endif
  35
  36 #endif