1 files changed, 49 insertions, 0 deletions

diff --git a/include/asm-ppc/cacheflush.h b/include/asm-ppc/cacheflush.h
new file mode 100644
index 000000000000..6a243efb3317
--- /dev/null
+++ b/include/asm-ppc/cacheflush.h
@@ -0,0 +1,49 @@
+/*
+ * include/asm-ppc/cacheflush.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_CACHEFLUSH_H
+#define _PPC_CACHEFLUSH_H
+
+#include <linux/mm.h>
+
+/*
+ * No cache flushing is required when address mappings are
+ * changed, because the caches on PowerPCs are physically
+ * addressed.  -- paulus
+ * Also, when SMP we use the coherency (M) bit of the
+ * BATs and PTEs.  -- Cort
+ */
+#define flush_cache_all()               do { } while (0)
+#define flush_cache_mm(mm)              do { } while (0)
+#define flush_cache_range(vma, a, b)    do { } while (0)
+#define flush_cache_page(vma, p, pfn)   do { } while (0)
+#define flush_icache_page(vma, page)    do { } while (0)
+#define flush_cache_vmap(start, end)    do { } while (0)
+#define flush_cache_vunmap(start, end)  do { } while (0)
+
+extern void flush_dcache_page(struct page *page);
+#define flush_dcache_mmap_lock(mapping)         do { } while (0)
+#define flush_dcache_mmap_unlock(mapping)       do { } while (0)
+
+extern void flush_icache_range(unsigned long, unsigned long);
+extern void flush_icache_user_range(struct vm_area_struct *vma,
+                struct page *page, unsigned long addr, int len);
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { memcpy(dst, src, len); \
+     flush_icache_user_range(vma, page, vaddr, len); \
+} while (0)
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+        memcpy(dst, src, len)
+
+extern void __flush_dcache_icache(void *page_va);
+extern void __flush_dcache_icache_phys(unsigned long physaddr);
+extern void flush_dcache_icache_page(struct page *page);
+#endif /* _PPC_CACHEFLUSH_H */
+#endif /* __KERNEL__ */