sh: Migrate SH-4 cacheflush ops to function pointers.

This paves the way for allowing individual CPUs to overload the
individual flushing routines that they care about without having to
depend on weak aliases. SH-4 is converted over initially, as it wires
up pretty much everything. The majority of the other CPUs will simply use
the default no-op implementation with their own region flushers wired up.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 20 insertions, 17 deletions

diff --git a/arch/sh/include/cpu-common/cpu/cacheflush.h b/arch/sh/include/cpu-common/cpu/cacheflush.h
index 5dc3736218e7..8189dbd68f8f 100644
--- a/arch/sh/include/cpu-common/cpu/cacheflush.h
+++ b/arch/sh/include/cpu-common/cpu/cacheflush.h
@@ -1,14 +1,12 @@
 /*
- * include/asm-sh/cpu-sh2/cacheflush.h
- *
  * Copyright (C) 2003 Paul Mundt
  *
  * 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_CPU_SH2_CACHEFLUSH_H
-#define __ASM_CPU_SH2_CACHEFLUSH_H
+#ifndef __ASM_CPU_SH_CACHEFLUSH_H
+#define __ASM_CPU_SH_CACHEFLUSH_H
 
 /*
  * Cache flushing:
@@ -22,18 +20,23 @@
  *  - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
  *  - flush_icache_range(start, end) flushes(invalidates) a range for icache
  *  - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
- *
- *  Caches are indexed (effectively) by physical address on SH-2, so
- *  we don't need them.
+ *  - flush_cache_sigtramp(vaddr) flushes the signal trampoline
  */
-#define flush_cache_all()                       do { } while (0)
-#define flush_cache_mm(mm)                      do { } while (0)
-#define flush_cache_dup_mm(mm)                  do { } while (0)
-#define flush_cache_range(vma, start, end)      do { } while (0)
-#define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
-#define flush_dcache_page(page)                 do { } while (0)
-#define flush_icache_range(start, end)          do { } while (0)
-#define flush_icache_page(vma,pg)               do { } while (0)
-#define flush_cache_sigtramp(vaddr)             do { } while (0)
+extern void (*flush_cache_all)(void);
+extern void (*flush_cache_mm)(struct mm_struct *mm);
+extern void (*flush_cache_dup_mm)(struct mm_struct *mm);
+extern void (*flush_cache_page)(struct vm_area_struct *vma,
+                                unsigned long addr, unsigned long pfn);
+extern void (*flush_cache_range)(struct vm_area_struct *vma,
+                                 unsigned long start, unsigned long end);
+extern void (*flush_dcache_page)(struct page *page);
+extern void (*flush_icache_range)(unsigned long start, unsigned long end);
+extern void (*flush_icache_page)(struct vm_area_struct *vma,
+                                 struct page *page);
+extern void (*flush_cache_sigtramp)(unsigned long address);
+
+extern void (*__flush_wback_region)(void *start, int size);
+extern void (*__flush_purge_region)(void *start, int size);
+extern void (*__flush_invalidate_region)(void *start, int size);
 
-#endif /* __ASM_CPU_SH2_CACHEFLUSH_H */
+#endif /* __ASM_CPU_SH_CACHEFLUSH_H */