1/*
2 * LZMA compressed kernel loader for Atheros AR7XXX/AR9XXX based boards
3 *
4 * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
5 *
6 * The cache manipulation routine has been taken from the U-Boot project.
7 *	(C) Copyright 2003
8 *	Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published
12 * by the Free Software Foundation.
13 *
14 */
15
16#include "cache.h"
17#include "cacheops.h"
18#include "config.h"
19
20#define cache_op(op,addr)						\
21	__asm__ __volatile__(						\
22	"	.set	push					\n"	\
23	"	.set	noreorder				\n"	\
24	"	.set	mips3\n\t				\n"	\
25	"	cache	%0, %1					\n"	\
26	"	.set	pop					\n"	\
27	:								\
28	: "i" (op), "R" (*(unsigned char *)(addr)))
29
30void flush_cache(unsigned long start_addr, unsigned long size)
31{
32	unsigned long lsize = CONFIG_CACHELINE_SIZE;
33	unsigned long addr = start_addr & ~(lsize - 1);
34	unsigned long aend = (start_addr + size - 1) & ~(lsize - 1);
35
36	while (1) {
37		cache_op(Hit_Writeback_Inv_D, addr);
38		cache_op(Hit_Invalidate_I, addr);
39		if (addr == aend)
40			break;
41		addr += lsize;
42	}
43}
44