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

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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>
This commit is contained in:
Paul Mundt
2009-07-27 20:53:22 +09:00
parent 2277ab4a1d
commit dfff0fa65a
9 changed files with 27 additions and 182 deletions
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12
arch/sh/include/asm/page.h
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@@ -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)