arch/cris/arch-v32/kernel/cache.c

   1 #include <linux/module.h>
   2 #include <asm/io.h>
   3 #include <arch/cache.h>
   4 #include <arch/hwregs/dma.h>
   5
   6 /* This file is used to workaround a cache bug, Guinness TR 106. */
   7
   8 inline void flush_dma_descr(struct dma_descr_data *descr, int flush_buf)
   9 {
  10         /* Flush descriptor to make sure we get correct in_eop and after. */
  11         asm volatile ("ftagd [%0]" :: "r" (descr));
  12         /* Flush buffer pointed out by descriptor. */
  13         if (flush_buf)
  14                 cris_flush_cache_range(phys_to_virt((unsigned)descr->buf),
  15                                 (unsigned)(descr->after - descr->buf));
  16 }
  17 EXPORT_SYMBOL(flush_dma_descr);
  18
  19 void flush_dma_list(struct dma_descr_data *descr)
  20 {
  21         while (1) {
  22                 flush_dma_descr(descr, 1);
  23                 if (descr->eol)
  24                         break;
  25                 descr = phys_to_virt((unsigned)descr->next);
  26         }
  27 }
  28 EXPORT_SYMBOL(flush_dma_list);
  29
  30 /* From cacheflush.S */
  31 EXPORT_SYMBOL(cris_flush_cache);
  32 /* From cacheflush.S */
  33 EXPORT_SYMBOL(cris_flush_cache_range);