2 * arch/sh/mm/cache-sh2a.c
4 * Copyright (C) 2008 Yoshinori Sato
6 * Released under the terms of the GNU GPL v2.0.
9 #include <linux/init.h>
12 #include <asm/cache.h>
13 #include <asm/addrspace.h>
14 #include <asm/processor.h>
15 #include <asm/cacheflush.h>
18 static void sh2a__flush_wback_region(void *start, int size)
21 unsigned long begin, end;
24 begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
25 end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
26 & ~(L1_CACHE_BYTES-1);
28 local_irq_save(flags);
31 for (v = begin; v < end; v+=L1_CACHE_BYTES) {
32 unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0);
34 for (way = 0; way < 4; way++) {
35 unsigned long data = __raw_readl(addr | (way << 11));
36 if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
37 data &= ~SH_CACHE_UPDATED;
38 __raw_writel(data, addr | (way << 11));
44 local_irq_restore(flags);
47 static void sh2a__flush_purge_region(void *start, int size)
50 unsigned long begin, end;
53 begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
54 end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
55 & ~(L1_CACHE_BYTES-1);
57 local_irq_save(flags);
60 for (v = begin; v < end; v+=L1_CACHE_BYTES) {
61 __raw_writel((v & CACHE_PHYSADDR_MASK),
62 CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
65 local_irq_restore(flags);
68 static void sh2a__flush_invalidate_region(void *start, int size)
71 unsigned long begin, end;
74 begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
75 end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
76 & ~(L1_CACHE_BYTES-1);
77 local_irq_save(flags);
80 #ifdef CONFIG_CACHE_WRITEBACK
81 __raw_writel(__raw_readl(CCR) | CCR_OCACHE_INVALIDATE, CCR);
82 /* I-cache invalidate */
83 for (v = begin; v < end; v+=L1_CACHE_BYTES) {
84 __raw_writel((v & CACHE_PHYSADDR_MASK),
85 CACHE_IC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
88 for (v = begin; v < end; v+=L1_CACHE_BYTES) {
89 __raw_writel((v & CACHE_PHYSADDR_MASK),
90 CACHE_IC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
91 __raw_writel((v & CACHE_PHYSADDR_MASK),
92 CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
96 local_irq_restore(flags);
99 /* WBack O-Cache and flush I-Cache */
100 static void sh2a_flush_icache_range(void *args)
102 struct flusher_data *data = args;
103 unsigned long start, end;
107 start = data->addr1 & ~(L1_CACHE_BYTES-1);
108 end = (data->addr2 + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);
110 local_irq_save(flags);
113 for (v = start; v < end; v+=L1_CACHE_BYTES) {
114 unsigned long addr = (v & 0x000007f0);
116 /* O-Cache writeback */
117 for (way = 0; way < 4; way++) {
118 unsigned long data = __raw_readl(CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
119 if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
120 data &= ~SH_CACHE_UPDATED;
121 __raw_writel(data, CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
124 /* I-Cache invalidate */
126 CACHE_IC_ADDRESS_ARRAY | addr | 0x00000008);
130 local_irq_restore(flags);
133 void __init sh2a_cache_init(void)
135 local_flush_icache_range = sh2a_flush_icache_range;
137 __flush_wback_region = sh2a__flush_wback_region;
138 __flush_purge_region = sh2a__flush_purge_region;
139 __flush_invalidate_region = sh2a__flush_invalidate_region;