1 files changed, 97 insertions, 0 deletions

diff --git a/arch/mips/mm/pgtable-32.c b/arch/mips/mm/pgtable-32.c
new file mode 100644
index 000000000000..4f07f81e8500
--- /dev/null
+++ b/arch/mips/mm/pgtable-32.c
@@ -0,0 +1,97 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 2003 by Ralf Baechle
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/highmem.h>
+#include <asm/pgtable.h>
+
+void pgd_init(unsigned long page)
+{
+        unsigned long *p = (unsigned long *) page;
+        int i;
+
+        for (i = 0; i < USER_PTRS_PER_PGD; i+=8) {
+                p[i + 0] = (unsigned long) invalid_pte_table;
+                p[i + 1] = (unsigned long) invalid_pte_table;
+                p[i + 2] = (unsigned long) invalid_pte_table;
+                p[i + 3] = (unsigned long) invalid_pte_table;
+                p[i + 4] = (unsigned long) invalid_pte_table;
+                p[i + 5] = (unsigned long) invalid_pte_table;
+                p[i + 6] = (unsigned long) invalid_pte_table;
+                p[i + 7] = (unsigned long) invalid_pte_table;
+        }
+}
+
+#ifdef CONFIG_HIGHMEM
+static void __init fixrange_init (unsigned long start, unsigned long end,
+        pgd_t *pgd_base)
+{
+        pgd_t *pgd;
+        pmd_t *pmd;
+        pte_t *pte;
+        int i, j;
+        unsigned long vaddr;
+
+        vaddr = start;
+        i = __pgd_offset(vaddr);
+        j = __pmd_offset(vaddr);
+        pgd = pgd_base + i;
+
+        for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
+                pmd = (pmd_t *)pgd;
+                for (; (j < PTRS_PER_PMD) && (vaddr != end); pmd++, j++) {
+                        if (pmd_none(*pmd)) {
+                                pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+                                set_pmd(pmd, __pmd((unsigned long)pte));
+                                if (pte != pte_offset_kernel(pmd, 0))
+                                        BUG();
+                        }
+                        vaddr += PMD_SIZE;
+                }
+                j = 0;
+        }
+}
+#endif
+
+void __init pagetable_init(void)
+{
+#ifdef CONFIG_HIGHMEM
+        unsigned long vaddr;
+        pgd_t *pgd, *pgd_base;
+        pmd_t *pmd;
+        pte_t *pte;
+#endif
+
+        /* Initialize the entire pgd.  */
+        pgd_init((unsigned long)swapper_pg_dir);
+        pgd_init((unsigned long)swapper_pg_dir
+                 + sizeof(pgd_t) * USER_PTRS_PER_PGD);
+
+#ifdef CONFIG_HIGHMEM
+        pgd_base = swapper_pg_dir;
+
+        /*
+         * Fixed mappings:
+         */
+        vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
+        fixrange_init(vaddr, 0, pgd_base);
+
+        /*
+         * Permanent kmaps:
+         */
+        vaddr = PKMAP_BASE;
+        fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base);
+
+        pgd = swapper_pg_dir + __pgd_offset(vaddr);
+        pmd = pmd_offset(pgd, vaddr);
+        pte = pte_offset_kernel(pmd, vaddr);
+        pkmap_page_table = pte;
+#endif
+}