This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sh / mm / pg-sh7705.c

diff --git a/arch/sh/mm/pg-sh7705.c b/arch/sh/mm/pg-sh7705.c
new file mode 100644 (file)
index 0000000..4a6eea8
--- /dev/null
+++ b/arch/sh/mm/pg-sh7705.c
@@ -0,0 +1,137 @@
+/*
+ * arch/sh/mm/pg-sh7705.c
+ *
+ * Copyright (C) 1999, 2000  Niibe Yutaka
+ * Copyright (C) 2004  Alex Song
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/threads.h>
+#include <asm/addrspace.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/cache.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+static inline void __flush_purge_virtual_region(void *p1, void *virt, int size)
+{
+       unsigned long v;
+       unsigned long begin, end;
+       unsigned long p1_begin;
+
+
+       begin = L1_CACHE_ALIGN((unsigned long)virt);
+       end = L1_CACHE_ALIGN((unsigned long)virt + size);
+
+       p1_begin = (unsigned long)p1 & ~(L1_CACHE_BYTES - 1);
+
+       /* do this the slow way as we may not have TLB entries
+        * for virt yet. */
+       for (v = begin; v < end; v += L1_CACHE_BYTES) {
+               unsigned long p;
+               unsigned long ways, addr;
+
+               p = __pa(p1_begin);
+
+               ways = cpu_data->dcache.ways;
+               addr = CACHE_OC_ADDRESS_ARRAY;
+
+               do {
+                       unsigned long data;
+
+                       addr |= (v & cpu_data->dcache.entry_mask);
+
+                       data = ctrl_inl(addr);
+                       if ((data & CACHE_PHYSADDR_MASK) ==
+                              (p & CACHE_PHYSADDR_MASK)) {
+                               data &= ~(SH_CACHE_UPDATED|SH_CACHE_VALID);
+                               ctrl_outl(data, addr);
+                       }
+
+                       addr += cpu_data->dcache.way_incr;
+               } while (--ways);
+
+               p1_begin += L1_CACHE_BYTES;
+       }
+}
+
+/*
+ * clear_user_page
+ * @to: P1 address
+ * @address: U0 address to be mapped
+ */
+void clear_user_page(void *to, unsigned long address, struct page *pg)
+{
+       struct page *page = virt_to_page(to);
+
+       __set_bit(PG_mapped, &page->flags);
+       if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
+               clear_page(to);
+               __flush_wback_region(to, PAGE_SIZE);
+       } else {
+               __flush_purge_virtual_region(to,
+                                            (void *)(address & 0xfffff000),
+                                            PAGE_SIZE);
+               clear_page(to);
+               __flush_wback_region(to, PAGE_SIZE);
+       }
+}
+
+/*
+ * copy_user_page
+ * @to: P1 address
+ * @from: P1 address
+ * @address: U0 address to be mapped
+ */
+void copy_user_page(void *to, void *from, unsigned long address, struct page *pg)
+{
+       struct page *page = virt_to_page(to);
+
+
+       __set_bit(PG_mapped, &page->flags);
+       if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
+               copy_page(to, from);
+               __flush_wback_region(to, PAGE_SIZE);
+       } else {
+               __flush_purge_virtual_region(to,
+                                            (void *)(address & 0xfffff000),
+                                            PAGE_SIZE);
+               copy_page(to, from);
+               __flush_wback_region(to, PAGE_SIZE);
+       }
+}
+
+/*
+ * For SH7705, we have our own implementation for ptep_get_and_clear
+ * Copied from pg-sh4.c
+ */
+inline pte_t ptep_get_and_clear(pte_t *ptep)
+{
+       pte_t pte = *ptep;
+
+       pte_clear(ptep);
+       if (!pte_not_present(pte)) {
+               unsigned long pfn = pte_pfn(pte);
+               if (pfn_valid(pfn)) {
+                       struct page *page = pfn_to_page(pfn);
+                       struct address_space *mapping = page_mapping(page);
+                       if (!mapping || !mapping_writably_mapped(mapping))
+                               __clear_bit(PG_mapped, &page->flags);
+               }
+       }
+
+       return pte;
+}
+