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authorMichal Simek <monstr@monstr.eu>2009-03-27 14:25:16 +0100
committerMichal Simek <monstr@monstr.eu>2009-03-27 14:25:16 +0100
commit8beb8503bfa305cd7d9efa590517a9c01e2f97b4 (patch)
tree910b5b96454482b4ad8540c528456a0a53291c0b /arch/microblaze/include/asm/cacheflush.h
parent37069abf2973f51aa12aa9dcb86c7403c9828161 (diff)
downloadvexpress-lsk-8beb8503bfa305cd7d9efa590517a9c01e2f97b4.tar.gz
microblaze_v8: cache support
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/include/asm/cacheflush.h')
-rw-r--r--arch/microblaze/include/asm/cacheflush.h85
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/cacheflush.h b/arch/microblaze/include/asm/cacheflush.h
new file mode 100644
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+++ b/arch/microblaze/include/asm/cacheflush.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2007 PetaLogix
+ * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
+ * based on v850 version which was
+ * Copyright (C) 2001,02,03 NEC Electronics Corporation
+ * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file COPYING in the main directory of this
+ * archive for more details.
+ *
+ */
+
+#ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
+#define _ASM_MICROBLAZE_CACHEFLUSH_H
+
+/* Somebody depends on this; sigh... */
+#include <linux/mm.h>
+
+/*
+ * Cache handling functions.
+ * Microblaze has a write-through data cache, meaning that the data cache
+ * never needs to be flushed. The only flushing operations that are
+ * implemented are to invalidate the instruction cache. These are called
+ * after loading a user application into memory, we must invalidate the
+ * instruction cache to make sure we don't fetch old, bad code.
+ */
+
+/* FIXME for LL-temac driver */
+#define invalidate_dcache_range(start, end) \
+ __invalidate_dcache_range(start, end)
+
+#define flush_cache_all() __invalidate_cache_all()
+#define flush_cache_mm(mm) do { } while (0)
+#define flush_cache_range(vma, start, end) __invalidate_cache_all()
+#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
+
+#define flush_dcache_range(start, end) __invalidate_dcache_range(start, end)
+#define flush_dcache_page(page) do { } while (0)
+#define flush_dcache_mmap_lock(mapping) do { } while (0)
+#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+
+#define flush_icache_range(start, len) __invalidate_icache_range(start, len)
+#define flush_icache_page(vma, pg) do { } while (0)
+
+#define flush_cache_vmap(start, end) do { } while (0)
+#define flush_cache_vunmap(start, end) do { } while (0)
+
+struct page;
+struct mm_struct;
+struct vm_area_struct;
+
+/* see arch/microblaze/kernel/cache.c */
+extern void __invalidate_icache_all(void);
+extern void __invalidate_icache_range(unsigned long start, unsigned long end);
+extern void __invalidate_icache_page(struct vm_area_struct *vma,
+ struct page *page);
+extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
+ struct page *page,
+ unsigned long adr, int len);
+extern void __invalidate_cache_sigtramp(unsigned long addr);
+
+extern void __invalidate_dcache_all(void);
+extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
+extern void __invalidate_dcache_page(struct vm_area_struct *vma,
+ struct page *page);
+extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
+ struct page *page,
+ unsigned long adr, int len);
+
+extern inline void __invalidate_cache_all(void)
+{
+ __invalidate_icache_all();
+ __invalidate_dcache_all();
+}
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { memcpy((dst), (src), (len)); \
+ flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
+} while (0)
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+ memcpy((dst), (src), (len))
+
+#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */