Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/sh/mm/pg-sh7705.c b/arch/sh/mm/pg-sh7705.c
new file mode 100644
index 0000000..ff9ece9
--- /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(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+ pte_t pte = *ptep;
+
+ pte_clear(mm, addr, 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;
+}
+