1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2001-2003, 2006 Silicon Graphics, Inc. All rights reserved.
7 *
8 */
9#include <linux/module.h>
10#include <asm/pgalloc.h>
11#include <asm/sn/arch.h>
12
13/**
14 * sn_flush_all_caches - flush a range of address from all caches (incl. L4)
15 * @flush_addr: identity mapped region 7 address to start flushing
16 * @bytes: number of bytes to flush
17 *
18 * Flush a range of addresses from all caches including L4.
19 * All addresses fully or partially contained within
20 * @flush_addr to @flush_addr + @bytes are flushed
21 * from all caches.
22 */
23void
24sn_flush_all_caches(long flush_addr, long bytes)
25{
26	unsigned long addr = flush_addr;
27
28	/* SHub1 requires a cached address */
29	if (is_shub1() && (addr & RGN_BITS) == RGN_BASE(RGN_UNCACHED))
30		addr = (addr - RGN_BASE(RGN_UNCACHED)) + RGN_BASE(RGN_KERNEL);
31
32	flush_icache_range(addr, addr + bytes);
33	/*
34	 * The last call may have returned before the caches
35	 * were actually flushed, so we call it again to make
36	 * sure.
37	 */
38	flush_icache_range(addr, addr + bytes);
39	mb();
40}
41EXPORT_SYMBOL(sn_flush_all_caches);
42