4 * Copyright (C) 1999, 2000, 2002 Niibe Yutaka
5 * Copyright (C) 2002 - 2009 Paul Mundt
7 * Released under the terms of the GNU GPL v2.0.
10 #include <linux/init.h>
11 #include <linux/mutex.h>
13 #include <linux/highmem.h>
14 #include <linux/module.h>
15 #include <asm/mmu_context.h>
16 #include <asm/cacheflush.h>
18 void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
19 unsigned long vaddr, void *dst, const void *src,
22 if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
23 !test_bit(PG_dcache_dirty, &page->flags)) {
24 void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
25 memcpy(vto, src, len);
28 memcpy(dst, src, len);
29 if (boot_cpu_data.dcache.n_aliases)
30 set_bit(PG_dcache_dirty, &page->flags);
33 if (vma->vm_flags & VM_EXEC)
34 flush_cache_page(vma, vaddr, page_to_pfn(page));
37 void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
38 unsigned long vaddr, void *dst, const void *src,
41 if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
42 !test_bit(PG_dcache_dirty, &page->flags)) {
43 void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
44 memcpy(dst, vfrom, len);
47 memcpy(dst, src, len);
48 if (boot_cpu_data.dcache.n_aliases)
49 set_bit(PG_dcache_dirty, &page->flags);
53 void copy_user_highpage(struct page *to, struct page *from,
54 unsigned long vaddr, struct vm_area_struct *vma)
58 vto = kmap_atomic(to, KM_USER1);
60 if (boot_cpu_data.dcache.n_aliases && page_mapped(from) &&
61 !test_bit(PG_dcache_dirty, &from->flags)) {
62 vfrom = kmap_coherent(from, vaddr);
63 copy_page(vto, vfrom);
66 vfrom = kmap_atomic(from, KM_USER0);
67 copy_page(vto, vfrom);
68 kunmap_atomic(vfrom, KM_USER0);
71 if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
72 __flush_wback_region(vto, PAGE_SIZE);
74 kunmap_atomic(vto, KM_USER1);
75 /* Make sure this page is cleared on other CPU's too before using it */
78 EXPORT_SYMBOL(copy_user_highpage);
80 void clear_user_highpage(struct page *page, unsigned long vaddr)
82 void *kaddr = kmap_atomic(page, KM_USER0);
86 if (pages_do_alias((unsigned long)kaddr, vaddr & PAGE_MASK))
87 __flush_wback_region(kaddr, PAGE_SIZE);
89 kunmap_atomic(kaddr, KM_USER0);
91 EXPORT_SYMBOL(clear_user_highpage);
93 void __update_cache(struct vm_area_struct *vma,
94 unsigned long address, pte_t pte)
97 unsigned long pfn = pte_pfn(pte);
99 if (!boot_cpu_data.dcache.n_aliases)
102 page = pfn_to_page(pfn);
103 if (pfn_valid(pfn) && page_mapping(page)) {
104 int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
106 unsigned long addr = (unsigned long)page_address(page);
108 if (pages_do_alias(addr, address & PAGE_MASK))
109 __flush_wback_region((void *)addr, PAGE_SIZE);
114 void __flush_anon_page(struct page *page, unsigned long vmaddr)
116 unsigned long addr = (unsigned long) page_address(page);
118 if (pages_do_alias(addr, vmaddr)) {
119 if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
120 !test_bit(PG_dcache_dirty, &page->flags)) {
123 kaddr = kmap_coherent(page, vmaddr);
124 __flush_wback_region((void *)kaddr, PAGE_SIZE);
127 __flush_wback_region((void *)addr, PAGE_SIZE);
131 static void compute_alias(struct cache_info *c)
133 c->alias_mask = ((c->sets - 1) << c->entry_shift) & ~(PAGE_SIZE - 1);
134 c->n_aliases = c->alias_mask ? (c->alias_mask >> PAGE_SHIFT) + 1 : 0;
137 static void __init emit_cache_params(void)
139 printk(KERN_NOTICE "I-cache : n_ways=%d n_sets=%d way_incr=%d\n",
140 boot_cpu_data.icache.ways,
141 boot_cpu_data.icache.sets,
142 boot_cpu_data.icache.way_incr);
143 printk(KERN_NOTICE "I-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n",
144 boot_cpu_data.icache.entry_mask,
145 boot_cpu_data.icache.alias_mask,
146 boot_cpu_data.icache.n_aliases);
147 printk(KERN_NOTICE "D-cache : n_ways=%d n_sets=%d way_incr=%d\n",
148 boot_cpu_data.dcache.ways,
149 boot_cpu_data.dcache.sets,
150 boot_cpu_data.dcache.way_incr);
151 printk(KERN_NOTICE "D-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n",
152 boot_cpu_data.dcache.entry_mask,
153 boot_cpu_data.dcache.alias_mask,
154 boot_cpu_data.dcache.n_aliases);
157 * Emit Secondary Cache parameters if the CPU has a probed L2.
159 if (boot_cpu_data.flags & CPU_HAS_L2_CACHE) {
160 printk(KERN_NOTICE "S-cache : n_ways=%d n_sets=%d way_incr=%d\n",
161 boot_cpu_data.scache.ways,
162 boot_cpu_data.scache.sets,
163 boot_cpu_data.scache.way_incr);
164 printk(KERN_NOTICE "S-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n",
165 boot_cpu_data.scache.entry_mask,
166 boot_cpu_data.scache.alias_mask,
167 boot_cpu_data.scache.n_aliases);
171 void __init cpu_cache_init(void)
173 compute_alias(&boot_cpu_data.icache);
174 compute_alias(&boot_cpu_data.dcache);
175 compute_alias(&boot_cpu_data.scache);
177 if ((boot_cpu_data.family == CPU_FAMILY_SH4) ||
178 (boot_cpu_data.family == CPU_FAMILY_SH4A) ||
179 (boot_cpu_data.family == CPU_FAMILY_SH4AL_DSP)) {
180 extern void __weak sh4_cache_init(void);