alt_dcache_flush_all.c

nios中自定义指令集实现三角函数的软件部分。

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#include "nios2.h"
#include "system.h"

#include "alt_types.h"
#include "sys/alt_cache.h" 

/*
 * alt_dcache_flush_all() is called to flush the entire data cache.
 */

void alt_dcache_flush_all (void)
{
#if NIOS2_DCACHE_SIZE > 0
  char* i;
  
  for (i = (char*) 0; i < (char*) NIOS2_DCACHE_SIZE; i+= NIOS2_DCACHE_LINE_SIZE)
  { 
    __asm__ volatile ("flushd (%0)" :: "r" (i));
  }
#endif /* NIOS2_DCACHE_SIZE > 0 */
}