1/*
 2 * arch/sh/mm/cache-j2.c
 3 *
 4 * Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
 5 *
 6 * Released under the terms of the GNU GPL v2.0.
 7 */
 8
 9#include <linux/init.h>
10#include <linux/mm.h>
11#include <linux/cpumask.h>
12
13#include <asm/cache.h>
14#include <asm/addrspace.h>
15#include <asm/processor.h>
16#include <asm/cacheflush.h>
17#include <asm/io.h>
18
19#define ICACHE_ENABLE	0x1
20#define DCACHE_ENABLE	0x2
21#define CACHE_ENABLE	(ICACHE_ENABLE | DCACHE_ENABLE)
22#define ICACHE_FLUSH	0x100
23#define DCACHE_FLUSH	0x200
24#define CACHE_FLUSH	(ICACHE_FLUSH | DCACHE_FLUSH)
25
26u32 __iomem *j2_ccr_base;
27
28static void j2_flush_icache(void *args)
29{
30	unsigned cpu;
31	for_each_possible_cpu(cpu)
32		__raw_writel(CACHE_ENABLE | ICACHE_FLUSH, j2_ccr_base + cpu);
33}
34
35static void j2_flush_dcache(void *args)
36{
37	unsigned cpu;
38	for_each_possible_cpu(cpu)
39		__raw_writel(CACHE_ENABLE | DCACHE_FLUSH, j2_ccr_base + cpu);
40}
41
42static void j2_flush_both(void *args)
43{
44	unsigned cpu;
45	for_each_possible_cpu(cpu)
46		__raw_writel(CACHE_ENABLE | CACHE_FLUSH, j2_ccr_base + cpu);
47}
48
49void __init j2_cache_init(void)
50{
51	if (!j2_ccr_base)
52		return;
53
54	local_flush_cache_all = j2_flush_both;
55	local_flush_cache_mm = j2_flush_both;
56	local_flush_cache_dup_mm = j2_flush_both;
57	local_flush_cache_page = j2_flush_both;
58	local_flush_cache_range = j2_flush_both;
59	local_flush_dcache_page = j2_flush_dcache;
60	local_flush_icache_range = j2_flush_icache;
61	local_flush_icache_page = j2_flush_icache;
62	local_flush_cache_sigtramp = j2_flush_icache;
63
64	pr_info("Initial J2 CCR is %.8x\n", __raw_readl(j2_ccr_base));
65}