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c456cfc2 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
5a846aba RF |
2 | /* |
3 | * arch/sh/mm/cache-j2.c | |
4 | * | |
5 | * Copyright (C) 2015-2016 Smart Energy Instruments, Inc. | |
5a846aba RF |
6 | */ |
7 | ||
8 | #include <linux/init.h> | |
9 | #include <linux/mm.h> | |
10 | #include <linux/cpumask.h> | |
11 | ||
12 | #include <asm/cache.h> | |
13 | #include <asm/addrspace.h> | |
14 | #include <asm/processor.h> | |
15 | #include <asm/cacheflush.h> | |
16 | #include <asm/io.h> | |
17 | ||
18 | #define ICACHE_ENABLE 0x1 | |
19 | #define DCACHE_ENABLE 0x2 | |
20 | #define CACHE_ENABLE (ICACHE_ENABLE | DCACHE_ENABLE) | |
21 | #define ICACHE_FLUSH 0x100 | |
22 | #define DCACHE_FLUSH 0x200 | |
23 | #define CACHE_FLUSH (ICACHE_FLUSH | DCACHE_FLUSH) | |
24 | ||
25 | u32 __iomem *j2_ccr_base; | |
26 | ||
27 | static void j2_flush_icache(void *args) | |
28 | { | |
29 | unsigned cpu; | |
30 | for_each_possible_cpu(cpu) | |
31 | __raw_writel(CACHE_ENABLE | ICACHE_FLUSH, j2_ccr_base + cpu); | |
32 | } | |
33 | ||
34 | static void j2_flush_dcache(void *args) | |
35 | { | |
36 | unsigned cpu; | |
37 | for_each_possible_cpu(cpu) | |
38 | __raw_writel(CACHE_ENABLE | DCACHE_FLUSH, j2_ccr_base + cpu); | |
39 | } | |
40 | ||
41 | static void j2_flush_both(void *args) | |
42 | { | |
43 | unsigned cpu; | |
44 | for_each_possible_cpu(cpu) | |
45 | __raw_writel(CACHE_ENABLE | CACHE_FLUSH, j2_ccr_base + cpu); | |
46 | } | |
47 | ||
48 | void __init j2_cache_init(void) | |
49 | { | |
50 | if (!j2_ccr_base) | |
51 | return; | |
52 | ||
53 | local_flush_cache_all = j2_flush_both; | |
54 | local_flush_cache_mm = j2_flush_both; | |
55 | local_flush_cache_dup_mm = j2_flush_both; | |
56 | local_flush_cache_page = j2_flush_both; | |
57 | local_flush_cache_range = j2_flush_both; | |
58 | local_flush_dcache_page = j2_flush_dcache; | |
59 | local_flush_icache_range = j2_flush_icache; | |
60 | local_flush_icache_page = j2_flush_icache; | |
61 | local_flush_cache_sigtramp = j2_flush_icache; | |
62 | ||
63 | pr_info("Initial J2 CCR is %.8x\n", __raw_readl(j2_ccr_base)); | |
64 | } |