sh: wire up clear_user_highpage() for sh4, convert sh7705.

This wires up clear_user_highpage() on SH-4 and subsequently converts the
SH7705 32kB cache mode over to using it. Now that the SH-4 implementation
handles all of the dcache purging directly in the aliasing case, there is
no need to do this in the default clear_page() implementation.

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

3 files changed, 11 insertions, 6 deletions

diff --git a/arch/sh/include/asm/cacheflush.h b/arch/sh/include/asm/cacheflush.h
index 4c5462daa74c..4e360114269d 100644
--- a/arch/sh/include/asm/cacheflush.h
+++ b/arch/sh/include/asm/cacheflush.h
@@ -49,7 +49,7 @@ static inline void flush_kernel_dcache_page(struct page *page)
         flush_dcache_page(page);
 }
 
-#if defined(CONFIG_CPU_SH4) && !defined(CONFIG_CACHE_OFF)
+#if (defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)) && !defined(CONFIG_CACHE_OFF)
 extern void copy_to_user_page(struct vm_area_struct *vma,
         struct page *page, unsigned long vaddr, void *dst, const void *src,
         unsigned long len);
diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
index a31ab40040f0..5208b7bfc24e 100644
--- a/arch/sh/include/asm/page.h
+++ b/arch/sh/include/asm/page.h
@@ -56,21 +56,25 @@ pages_do_alias(unsigned long addr1, unsigned long addr2)
         return (addr1 ^ addr2) & shm_align_mask;
 }
 
-extern void clear_page(void *to);
+
+#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
 extern void copy_page(void *to, void *from);
 
+struct page;
+struct vm_area_struct;
+
 #if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU) && \
         (defined(CONFIG_CPU_SH5) || defined(CONFIG_CPU_SH4) || \
          defined(CONFIG_SH7705_CACHE_32KB))
-struct page;
-struct vm_area_struct;
 extern void clear_user_page(void *to, unsigned long address, struct page *page);
 extern void copy_user_page(void *to, void *from, unsigned long address,
                            struct page *page);
-#if defined(CONFIG_CPU_SH4)
+#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)
 extern void copy_user_highpage(struct page *to, struct page *from,
                                unsigned long vaddr, struct vm_area_struct *vma);
 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
+extern void clear_user_highpage(struct page *page, unsigned long vaddr);
+#define clear_user_highpage     clear_user_highpage
 #endif
 #else
 #define clear_user_page(page, vaddr, pg)        clear_page(page)
diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h
index d9f68f9c3cb3..bef3ab7fc09e 100644
--- a/arch/sh/include/asm/pgtable.h
+++ b/arch/sh/include/asm/pgtable.h
@@ -141,7 +141,8 @@ extern void paging_init(void);
 extern void page_table_range_init(unsigned long start, unsigned long end,
                                   pgd_t *pgd);
 
-#if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_CPU_SH4) && defined(CONFIG_MMU)
+#if !defined(CONFIG_CACHE_OFF) && (defined(CONFIG_CPU_SH4) || \
+    defined(CONFIG_SH7705_CACHE_32KB)) && defined(CONFIG_MMU)
 extern void kmap_coherent_init(void);
 #else
 #define kmap_coherent_init()    do { } while (0)