1 /* cache.S - Flush the processor cache for a specific region. */
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 2004,2007 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 #define CACHE_LINE_BYTES 32
25 .globl grub_arch_sync_caches
26 grub_arch_sync_caches:
27 /* `address' may not be CACHE_LINE_BYTES-aligned. */
28 andi. 6, 3, CACHE_LINE_BYTES - 1 /* Find the misalignment. */
29 add 4, 4, 6 /* Adjust `size' to compensate. */
31 /* Force the dcache lines to memory. */
34 addi 5, 5, CACHE_LINE_BYTES
37 sync /* Force all dcbsts to complete. */
39 /* Invalidate the icache lines. */
42 addi 5, 5, CACHE_LINE_BYTES
45 sync /* Force all icbis to complete. */
46 isync /* Discard partially executed instructions that were
47 loaded from the invalid icache. */