init android origin source code

1 files changed, 70 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/arch/mips/mm/pgtable-32.c b/ANDROID_3.4.5/arch/mips/mm/pgtable-32.c
new file mode 100644
index 00000000..adc6911b
--- /dev/null
+++ b/ANDROID_3.4.5/arch/mips/mm/pgtable-32.c
@@ -0,0 +1,70 @@
+/*
+ * 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/init.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/highmem.h>
+#include <asm/fixmap.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.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;
+	}
+}
+
+void __init pagetable_init(void)
+{
+	unsigned long vaddr;
+	pgd_t *pgd_base;
+#ifdef CONFIG_HIGHMEM
+	pgd_t *pgd;
+	pud_t *pud;
+	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);
+
+	pgd_base = swapper_pg_dir;
+
+	/*
+	 * Fixed mappings:
+	 */
+	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
+	fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
+
+#ifdef CONFIG_HIGHMEM
+	/*
+	 * Permanent kmaps:
+	 */
+	vaddr = PKMAP_BASE;
+	fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base);
+
+	pgd = swapper_pg_dir + __pgd_offset(vaddr);
+	pud = pud_offset(pgd, vaddr);
+	pmd = pmd_offset(pud, vaddr);
+	pte = pte_offset_kernel(pmd, vaddr);
+	pkmap_page_table = pte;
+#endif
+}