1 files changed, 99 insertions, 0 deletions

diff --git a/include/asm-ia64/tlbflush.h b/include/asm-ia64/tlbflush.h
new file mode 100644
index 000000000000..b65c62702724
--- /dev/null
+++ b/include/asm-ia64/tlbflush.h
@@ -0,0 +1,99 @@
+#ifndef _ASM_IA64_TLBFLUSH_H
+#define _ASM_IA64_TLBFLUSH_H
+
+/*
+ * Copyright (C) 2002 Hewlett-Packard Co
+ *      David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+#include <linux/config.h>
+
+#include <linux/mm.h>
+
+#include <asm/intrinsics.h>
+#include <asm/mmu_context.h>
+#include <asm/page.h>
+
+/*
+ * Now for some TLB flushing routines.  This is the kind of stuff that
+ * can be very expensive, so try to avoid them whenever possible.
+ */
+
+/*
+ * Flush everything (kernel mapping may also have changed due to
+ * vmalloc/vfree).
+ */
+extern void local_flush_tlb_all (void);
+
+#ifdef CONFIG_SMP
+  extern void smp_flush_tlb_all (void);
+  extern void smp_flush_tlb_mm (struct mm_struct *mm);
+# define flush_tlb_all()        smp_flush_tlb_all()
+#else
+# define flush_tlb_all()        local_flush_tlb_all()
+#endif
+
+static inline void
+local_finish_flush_tlb_mm (struct mm_struct *mm)
+{
+        if (mm == current->active_mm)
+                activate_context(mm);
+}
+
+/*
+ * Flush a specified user mapping.  This is called, e.g., as a result of fork() and
+ * exit().  fork() ends up here because the copy-on-write mechanism needs to write-protect
+ * the PTEs of the parent task.
+ */
+static inline void
+flush_tlb_mm (struct mm_struct *mm)
+{
+        if (!mm)
+                return;
+
+        mm->context = 0;
+
+        if (atomic_read(&mm->mm_users) == 0)
+                return;         /* happens as a result of exit_mmap() */
+
+#ifdef CONFIG_SMP
+        smp_flush_tlb_mm(mm);
+#else
+        local_finish_flush_tlb_mm(mm);
+#endif
+}
+
+extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end);
+
+/*
+ * Page-granular tlb flush.
+ */
+static inline void
+flush_tlb_page (struct vm_area_struct *vma, unsigned long addr)
+{
+#ifdef CONFIG_SMP
+        flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE);
+#else
+        if (vma->vm_mm == current->active_mm)
+                ia64_ptcl(addr, (PAGE_SHIFT << 2));
+        else
+                vma->vm_mm->context = 0;
+#endif
+}
+
+/*
+ * Flush the TLB entries mapping the virtually mapped linear page
+ * table corresponding to address range [START-END).
+ */
+static inline void
+flush_tlb_pgtables (struct mm_struct *mm, unsigned long start, unsigned long end)
+{
+        /*
+         * Deprecated.  The virtual page table is now flushed via the normal gather/flush
+         * interface (see tlb.h).
+         */
+}
+
+#define flush_tlb_kernel_range(start, end)      flush_tlb_all() /* XXX fix me */
+
+#endif /* _ASM_IA64_TLBFLUSH_H */