2 * arch/sh/mm/pg-sh7705.c
4 * Copyright (C) 1999, 2000 Niibe Yutaka
5 * Copyright (C) 2004 Alex Song
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file "COPYING" in the main directory of this archive
11 #include <linux/init.h>
12 #include <linux/mman.h>
14 #include <linux/threads.h>
15 #include <asm/addrspace.h>
17 #include <asm/pgtable.h>
18 #include <asm/processor.h>
19 #include <asm/cache.h>
21 #include <asm/uaccess.h>
22 #include <asm/pgalloc.h>
23 #include <asm/mmu_context.h>
24 #include <asm/cacheflush.h>
26 static inline void __flush_purge_virtual_region(void *p1, void *virt, int size)
29 unsigned long begin, end;
30 unsigned long p1_begin;
33 begin = L1_CACHE_ALIGN((unsigned long)virt);
34 end = L1_CACHE_ALIGN((unsigned long)virt + size);
36 p1_begin = (unsigned long)p1 & ~(L1_CACHE_BYTES - 1);
38 /* do this the slow way as we may not have TLB entries
40 for (v = begin; v < end; v += L1_CACHE_BYTES) {
42 unsigned long ways, addr;
46 ways = current_cpu_data.dcache.ways;
47 addr = CACHE_OC_ADDRESS_ARRAY;
52 addr |= (v & current_cpu_data.dcache.entry_mask);
54 data = ctrl_inl(addr);
55 if ((data & CACHE_PHYSADDR_MASK) ==
56 (p & CACHE_PHYSADDR_MASK)) {
57 data &= ~(SH_CACHE_UPDATED|SH_CACHE_VALID);
58 ctrl_outl(data, addr);
61 addr += current_cpu_data.dcache.way_incr;
64 p1_begin += L1_CACHE_BYTES;
71 * @address: U0 address to be mapped
73 void clear_user_page(void *to, unsigned long address, struct page *pg)
75 struct page *page = virt_to_page(to);
77 if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
79 __flush_wback_region(to, PAGE_SIZE);
81 __flush_purge_virtual_region(to,
82 (void *)(address & 0xfffff000),
85 __flush_wback_region(to, PAGE_SIZE);
93 * @address: U0 address to be mapped
95 void copy_user_page(void *to, void *from, unsigned long address,
98 struct page *page = virt_to_page(to);
100 if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
102 __flush_wback_region(to, PAGE_SIZE);
104 __flush_purge_virtual_region(to,
105 (void *)(address & 0xfffff000),
108 __flush_wback_region(to, PAGE_SIZE);