arch/unicore32/include/mach/ocd.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * linux/arch/unicore32/include/mach/ocd.h
   4  *
   5  * Code specific to PKUnity SoC and UniCore ISA
   6  *
   7  * Copyright (C) 2001-2010 GUAN Xue-tao
   8  */
   9
  10 #ifndef __MACH_PUV3_OCD_H__
  11 #define __MACH_PUV3_OCD_H__
  12
  13 #if defined(CONFIG_DEBUG_OCD)
  14 static inline void ocd_putc(unsigned int c)
  15 {
  16         int status, i = 0x2000000;
  17
  18         do {
  19                 if (--i < 0)
  20                         return;
  21
  22                 asm volatile ("movc %0, p1.c0, #0" : "=r" (status));
  23         } while (status & 2);
  24
  25         asm("movc p1.c1, %0, #1" : : "r" (c));
  26 }
  27
  28 #define putc(ch)        ocd_putc(ch)
  29 #else
  30 #define putc(ch)
  31 #endif
  32
  33 #endif