1 /* cache.S - Flush the processor cache for a specific region. */
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 2005,2007 Free Software Foundation, Inc.
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.
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.
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/>.
20 #include <grub/symbol.h>
27 * void grub_arch_sync_caches (void *address, grub_size_t len)
29 FUNCTION(grub_arch_sync_caches)
30 save %o6, -0xC, %o6 ! Get a new register window,
31 ! reserve space on stack for
33 brz,pn %i0, return ! Return if address == 0.
35 brz,pn %i1, return ! Return if len == 0.
37 loop: flush %i0 + %i2 ! Flush address + index.
38 cmp %i1, %i2 ! Compare len & index .
39 bpos,a,pt %xcc, loop ! If len > index, loop.
40 add %i2, 8, %i2 ! Go to next doubleword.
41 return: ret ! Restore caller's register
42 restore ! window and return.