1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/sh/mm/cache-sh2.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2002 Paul Mundt
6*4882a593Smuzhiyun * Copyright (C) 2008 Yoshinori Sato
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/init.h>
10*4882a593Smuzhiyun #include <linux/mm.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <asm/cache.h>
13*4882a593Smuzhiyun #include <asm/addrspace.h>
14*4882a593Smuzhiyun #include <asm/processor.h>
15*4882a593Smuzhiyun #include <asm/cacheflush.h>
16*4882a593Smuzhiyun #include <asm/io.h>
17*4882a593Smuzhiyun
sh2__flush_wback_region(void * start,int size)18*4882a593Smuzhiyun static void sh2__flush_wback_region(void *start, int size)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun unsigned long v;
21*4882a593Smuzhiyun unsigned long begin, end;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
24*4882a593Smuzhiyun end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
25*4882a593Smuzhiyun & ~(L1_CACHE_BYTES-1);
26*4882a593Smuzhiyun for (v = begin; v < end; v+=L1_CACHE_BYTES) {
27*4882a593Smuzhiyun unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0);
28*4882a593Smuzhiyun int way;
29*4882a593Smuzhiyun for (way = 0; way < 4; way++) {
30*4882a593Smuzhiyun unsigned long data = __raw_readl(addr | (way << 12));
31*4882a593Smuzhiyun if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
32*4882a593Smuzhiyun data &= ~SH_CACHE_UPDATED;
33*4882a593Smuzhiyun __raw_writel(data, addr | (way << 12));
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
sh2__flush_purge_region(void * start,int size)39*4882a593Smuzhiyun static void sh2__flush_purge_region(void *start, int size)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun unsigned long v;
42*4882a593Smuzhiyun unsigned long begin, end;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
45*4882a593Smuzhiyun end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
46*4882a593Smuzhiyun & ~(L1_CACHE_BYTES-1);
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun for (v = begin; v < end; v+=L1_CACHE_BYTES)
49*4882a593Smuzhiyun __raw_writel((v & CACHE_PHYSADDR_MASK),
50*4882a593Smuzhiyun CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008);
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
sh2__flush_invalidate_region(void * start,int size)53*4882a593Smuzhiyun static void sh2__flush_invalidate_region(void *start, int size)
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun #ifdef CONFIG_CACHE_WRITEBACK
56*4882a593Smuzhiyun /*
57*4882a593Smuzhiyun * SH-2 does not support individual line invalidation, only a
58*4882a593Smuzhiyun * global invalidate.
59*4882a593Smuzhiyun */
60*4882a593Smuzhiyun unsigned long ccr;
61*4882a593Smuzhiyun unsigned long flags;
62*4882a593Smuzhiyun local_irq_save(flags);
63*4882a593Smuzhiyun jump_to_uncached();
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun ccr = __raw_readl(SH_CCR);
66*4882a593Smuzhiyun ccr |= CCR_CACHE_INVALIDATE;
67*4882a593Smuzhiyun __raw_writel(ccr, SH_CCR);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun back_to_cached();
70*4882a593Smuzhiyun local_irq_restore(flags);
71*4882a593Smuzhiyun #else
72*4882a593Smuzhiyun unsigned long v;
73*4882a593Smuzhiyun unsigned long begin, end;
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
76*4882a593Smuzhiyun end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
77*4882a593Smuzhiyun & ~(L1_CACHE_BYTES-1);
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun for (v = begin; v < end; v+=L1_CACHE_BYTES)
80*4882a593Smuzhiyun __raw_writel((v & CACHE_PHYSADDR_MASK),
81*4882a593Smuzhiyun CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008);
82*4882a593Smuzhiyun #endif
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun
sh2_cache_init(void)85*4882a593Smuzhiyun void __init sh2_cache_init(void)
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun __flush_wback_region = sh2__flush_wback_region;
88*4882a593Smuzhiyun __flush_purge_region = sh2__flush_purge_region;
89*4882a593Smuzhiyun __flush_invalidate_region = sh2__flush_invalidate_region;
90*4882a593Smuzhiyun }
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