1 files changed, 57 insertions, 0 deletions

diff --git a/include/asm-ppc/tlb.h b/include/asm-ppc/tlb.h
new file mode 100644
index 000000000000..2c142c5d8584
--- /dev/null
+++ b/include/asm-ppc/tlb.h
@@ -0,0 +1,57 @@
+/*
+ *      TLB shootdown specifics for PPC
+ *
+ * Copyright (C) 2002 Paul Mackerras, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _PPC_TLB_H
+#define _PPC_TLB_H
+
+#include <linux/config.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/tlbflush.h>
+#include <asm/page.h>
+#include <asm/mmu.h>
+
+#ifdef CONFIG_PPC_STD_MMU
+/* Classic PPC with hash-table based MMU... */
+
+struct mmu_gather;
+extern void tlb_flush(struct mmu_gather *tlb);
+
+/* Get the generic bits... */
+#include <asm-generic/tlb.h>
+
+/* Nothing needed here in fact... */
+#define tlb_start_vma(tlb, vma) do { } while (0)
+#define tlb_end_vma(tlb, vma)   do { } while (0)
+
+extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
+                             unsigned long address);
+
+static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
+                                        unsigned long address)
+{
+        if (pte_val(*ptep) & _PAGE_HASHPTE)
+                flush_hash_entry(tlb->mm, ptep, address);
+}
+
+#else
+/* Embedded PPC with software-loaded TLB, very simple... */
+
+#define tlb_start_vma(tlb, vma)         do { } while (0)
+#define tlb_end_vma(tlb, vma)           do { } while (0)
+#define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0)
+#define tlb_flush(tlb)                  flush_tlb_mm((tlb)->mm)
+
+/* Get the generic bits... */
+#include <asm-generic/tlb.h>
+
+#endif /* CONFIG_PPC_STD_MMU */
+
+#endif /* __PPC_TLB_H */