Commit 0dfae7d5 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Use the now generic SH-4 clear/copy page ops for all MMU platforms. 



Now that the SH-4 page clear/copy ops are generic, they can be used for
all platforms with CONFIG_MMU=y. SH-5 remains the odd one out, but it too
will gradually be converted over to using this interface.

SH-3 platforms which do not contain aliases will see no impact from this
change, while aliasing SH-3 platforms will get the same interface as
SH-4.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 221c007b

arch/sh/include/asm/cacheflush.h

+0 −15
Original line number Diff line number Diff line
@@ -49,7 +49,6 @@ static inline void flush_kernel_dcache_page(struct page *page) 
	flush_dcache_page(page);

}



#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);
@@ -57,20 +56,6 @@ extern void copy_to_user_page(struct vm_area_struct *vma, 
extern void copy_from_user_page(struct vm_area_struct *vma,

	struct page *page, unsigned long vaddr, void *dst, const void *src,

	unsigned long len);

#else

#define copy_to_user_page(vma, page, vaddr, dst, src, len)	\

	do {							\

		flush_cache_page(vma, vaddr, page_to_pfn(page));\

		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)	\

	do {							\

		flush_cache_page(vma, vaddr, page_to_pfn(page));\

		memcpy(dst, src, len);				\

	} while (0)

#endif



#define flush_cache_vmap(start, end)		flush_cache_all()

#define flush_cache_vunmap(start, end)		flush_cache_all()

arch/sh/include/asm/page.h

+6 −5
Original line number Diff line number Diff line
@@ -63,22 +63,23 @@ 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))

#if defined(CONFIG_CPU_SH5)

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) || defined(CONFIG_SH7705_CACHE_32KB)



#elif defined(CONFIG_MMU)

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)

#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)



#endif



/*

arch/sh/include/asm/pgtable.h

+1 −2
Original line number Diff line number Diff line
@@ -141,8 +141,7 @@ 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_SH7705_CACHE_32KB)) && defined(CONFIG_MMU)

#if defined(CONFIG_MMU) && !defined(CONFIG_CPU_SH5)

extern void kmap_coherent_init(void);

#else

#define kmap_coherent_init()	do { } while (0)

arch/sh/mm/Makefile_32

+1 −5
Original line number Diff line number Diff line
@@ -15,7 +15,7 @@ endif 
obj-y			+= $(cache-y)



mmu-y			:= tlb-nommu.o pg-nommu.o

mmu-$(CONFIG_MMU)	:= fault_32.o tlbflush_32.o ioremap_32.o

mmu-$(CONFIG_MMU)	:= fault_32.o tlbflush_32.o ioremap_32.o pg-mmu.o



obj-y			+= $(mmu-y)

obj-$(CONFIG_DEBUG_FS)	+= asids-debugfs.o
@@ -29,10 +29,6 @@ tlb-$(CONFIG_CPU_SH3) := tlb-sh3.o 
tlb-$(CONFIG_CPU_SH4)		:= tlb-sh4.o

tlb-$(CONFIG_CPU_HAS_PTEAEX)	:= tlb-pteaex.o

obj-y				+= $(tlb-y)

ifndef CONFIG_CACHE_OFF

obj-$(CONFIG_CPU_SH4)		+= pg-sh4.o

obj-$(CONFIG_SH7705_CACHE_32KB)	+= pg-sh4.o

endif

endif



obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o

arch/sh/mm/cache-sh5.c

+17 −0
Original line number Diff line number Diff line
@@ -831,4 +831,21 @@ void clear_user_page(void *to, unsigned long address, struct page *page) 
	else

		sh64_clear_user_page_coloured(to, address);

}



void copy_to_user_page(struct vm_area_struct *vma, struct page *page,

		       unsigned long vaddr, void *dst, const void *src,

		       unsigned long len)

{

	flush_cache_page(vma, vaddr, page_to_pfn(page));

	memcpy(dst, src, len);

	flush_icache_user_range(vma, page, vaddr, len);

}



void copy_from_user_page(struct vm_area_struct *vma, struct page *page,

			 unsigned long vaddr, void *dst, const void *src,

			 unsigned long len)

{

	flush_cache_page(vma, vaddr, page_to_pfn(page));

	memcpy(dst, src, len);

}

#endif

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