grub-core/kern/ia64/cache.c

   1 /* init.c - initialize an ia64-based EFI system */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2008  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/types.h>
  21 #include <grub/cache.h>
  22
  23 void
  24 grub_arch_sync_caches (void *address, grub_size_t len)
  25 {
  26   /* Cache line length is at least 32.  */
  27   len += (grub_uint64_t)address & 0x1f;
  28   grub_uint64_t a = (grub_uint64_t)address & ~0x1f;
  29
  30   /* Flush data.  */
  31   for (len = (len + 31) & ~0x1f; len > 0; len -= 0x20, a += 0x20)
  32     asm volatile ("fc.i %0" : : "r" (a));
  33   /* Sync and serialize.  Maybe extra.  */
  34   asm volatile (";; sync.i;; srlz.i;;");
  35 }