Changeset 416 for GPL/branches/uniaud32-2.0/include/asm/pgtable.h

Timestamp:

Mar 23, 2009, 12:05:32 AM (16 years ago)

Author:

Paul Smedley

Message:

Update header

File:

• GPL/branches/uniaud32-2.0/include/asm/pgtable.h (modified) (2 diffs)

GPL/branches/uniaud32-2.0/include/asm/pgtable.h

@@ -69 +69 @@
 #define __beep() asm("movb $0x3,%al; outb %al,$0x61")
 
+/* PMD_SHIFT determines the size of the area a second-level page table can map */
+#define PMD_SHIFT       22
 #define PMD_SIZE        (1UL << PMD_SHIFT)
 #define PMD_MASK        (~(PMD_SIZE-1))
+
+/* PGDIR_SHIFT determines what a third-level page table entry can map */
+#define PGDIR_SHIFT     22
 #define PGDIR_SIZE      (1UL << PGDIR_SHIFT)
 #define PGDIR_MASK      (~(PGDIR_SIZE-1))
 
+/*
+ * entries per page directory level: the i386 is two-level, so
+ * we don't really have any PMD directory physically.
+ */
+#define PTRS_PER_PTE    1024
+#define PTRS_PER_PMD    1
+#define PTRS_PER_PGD    1024
 #define USER_PTRS_PER_PGD       (TASK_SIZE/PGDIR_SIZE)
+
 
 #define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT)
@@ -189 +202 @@
 #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
 #define pte_page(x) (mem_map+pte_pagenr(x))
+
+/* Find an entry in the second-level page table.. */
+extern inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address)
+{
+        return (pmd_t *) dir;
+}
 
 /*