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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: Paul Mundt <lethal@linux-sh.org>
hifive-unleashed-5.1
Paul Mundt 2009-07-27 21:30:17 +09:00
parent 221c007b02
commit 0dfae7d5a2
6 changed files with 38 additions and 33 deletions
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15
arch/sh/include/asm/cacheflush.h
View File

@ -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()

11
arch/sh/include/asm/page.h
View File

@ -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
/*

3
arch/sh/include/asm/pgtable.h
View File

@ -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)

6
arch/sh/mm/Makefile_32
View File

@ -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

17
arch/sh/mm/cache-sh5.c
View File

@ -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

19
arch/sh/mm/pg-sh4.c → arch/sh/mm/pg-mmu.c
View File

@ -1,5 +1,5 @@
/*
* arch/sh/mm/pg-sh4.c
* arch/sh/mm/pg-mmu.c
*
* Copyright (C) 1999, 2000, 2002 Niibe Yutaka
* Copyright (C) 2002 - 2009 Paul Mundt
@ -22,11 +22,13 @@ static pte_t *kmap_coherent_pte;
void __init kmap_coherent_init(void)
{
#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)
unsigned long vaddr;
/* cache the first coherent kmap pte */
vaddr = __fix_to_virt(FIX_CMAP_BEGIN);
kmap_coherent_pte = kmap_get_fixmap_pte(vaddr);
#endif
}
static inline void *kmap_coherent(struct page *page, unsigned long addr)
@ -62,13 +64,15 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, void *dst, const void *src,
unsigned long len)
{
if (page_mapped(page) && !test_bit(PG_dcache_dirty, &page->flags)) {
if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
!test_bit(PG_dcache_dirty, &page->flags)) {
void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
memcpy(vto, src, len);
kunmap_coherent(vto);
} else {
memcpy(dst, src, len);
set_bit(PG_dcache_dirty, &page->flags);
if (boot_cpu_data.dcache.n_aliases)
set_bit(PG_dcache_dirty, &page->flags);
}
if (vma->vm_flags & VM_EXEC)
@ -79,13 +83,15 @@ void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, void *dst, const void *src,
unsigned long len)
{
if (page_mapped(page) && !test_bit(PG_dcache_dirty, &page->flags)) {
if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
!test_bit(PG_dcache_dirty, &page->flags)) {
void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
memcpy(dst, vfrom, len);
kunmap_coherent(vfrom);
} else {
memcpy(dst, src, len);
set_bit(PG_dcache_dirty, &page->flags);
if (boot_cpu_data.dcache.n_aliases)
set_bit(PG_dcache_dirty, &page->flags);
}
}
@ -96,7 +102,8 @@ void copy_user_highpage(struct page *to, struct page *from,
vto = kmap_atomic(to, KM_USER1);
if (page_mapped(from) && !test_bit(PG_dcache_dirty, &from->flags)) {
if (boot_cpu_data.dcache.n_aliases && page_mapped(from) &&
!test_bit(PG_dcache_dirty, &from->flags)) {
vfrom = kmap_coherent(from, vaddr);
copy_page(vto, vfrom);
kunmap_coherent(vfrom);