1 files changed, 115 insertions, 0 deletions

diff --git a/include/asm-ppc/tlbflush.h b/include/asm-ppc/tlbflush.h
new file mode 100644
index 000000000000..9850f53f54b0
--- /dev/null
+++ b/include/asm-ppc/tlbflush.h
@@ -0,0 +1,115 @@
+/*
+ * include/asm-ppc/tlbflush.h
+ *
+ *  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.
+ */
+#ifdef __KERNEL__
+#ifndef _PPC_TLBFLUSH_H
+#define _PPC_TLBFLUSH_H
+
+#include <linux/config.h>
+#include <linux/mm.h>
+
+extern void _tlbie(unsigned long address);
+extern void _tlbia(void);
+
+#if defined(CONFIG_4xx)
+
+#ifndef CONFIG_44x
+#define __tlbia()       asm volatile ("sync; tlbia; isync" : : : "memory")
+#else
+#define __tlbia         _tlbia
+#endif
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+        { __tlbia(); }
+static inline void flush_tlb_page(struct vm_area_struct *vma,
+                                unsigned long vmaddr)
+        { _tlbie(vmaddr); }
+static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
+                                         unsigned long vmaddr)
+        { _tlbie(vmaddr); }
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+                                unsigned long start, unsigned long end)
+        { __tlbia(); }
+static inline void flush_tlb_kernel_range(unsigned long start,
+                                unsigned long end)
+        { __tlbia(); }
+
+#elif defined(CONFIG_FSL_BOOKE)
+
+/* TODO: determine if flush_tlb_range & flush_tlb_kernel_range
+ * are best implemented as tlbia vs specific tlbie's */
+
+#define __tlbia()       _tlbia()
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+        { __tlbia(); }
+static inline void flush_tlb_page(struct vm_area_struct *vma,
+                                unsigned long vmaddr)
+        { _tlbie(vmaddr); }
+static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
+                                         unsigned long vmaddr)
+        { _tlbie(vmaddr); }
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+                                unsigned long start, unsigned long end)
+        { __tlbia(); }
+static inline void flush_tlb_kernel_range(unsigned long start,
+                                unsigned long end)
+        { __tlbia(); }
+
+#elif defined(CONFIG_8xx)
+#define __tlbia()       asm volatile ("tlbia; sync" : : : "memory")
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+        { __tlbia(); }
+static inline void flush_tlb_page(struct vm_area_struct *vma,
+                                unsigned long vmaddr)
+        { _tlbie(vmaddr); }
+static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
+                                         unsigned long vmaddr)
+        { _tlbie(vmaddr); }
+static inline void flush_tlb_range(struct mm_struct *mm,
+                                unsigned long start, unsigned long end)
+        { __tlbia(); }
+static inline void flush_tlb_kernel_range(unsigned long start,
+                                unsigned long end)
+        { __tlbia(); }
+
+#else   /* 6xx, 7xx, 7xxx cpus */
+struct mm_struct;
+struct vm_area_struct;
+extern void flush_tlb_mm(struct mm_struct *mm);
+extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
+extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
+extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+                            unsigned long end);
+extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
+#endif
+
+/*
+ * This is called in munmap when we have freed up some page-table
+ * pages.  We don't need to do anything here, there's nothing special
+ * about our page-table pages.  -- paulus
+ */
+static inline void flush_tlb_pgtables(struct mm_struct *mm,
+                                      unsigned long start, unsigned long end)
+{
+}
+
+/*
+ * This gets called at the end of handling a page fault, when
+ * the kernel has put a new PTE into the page table for the process.
+ * We use it to ensure coherency between the i-cache and d-cache
+ * for the page which has just been mapped in.
+ * On machines which use an MMU hash table, we use this to put a
+ * corresponding HPTE into the hash table ahead of time, instead of
+ * waiting for the inevitable extra hash-table miss exception.
+ */
+extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
+
+#endif /* _PPC_TLBFLUSH_H */
+#endif /*__KERNEL__ */