Commit a1176734 authored by Guo Ren's avatar Guo Ren
Browse files

csky: Remove unnecessary flush_icache_* implementation 



The abiv2 CPUs are all PIPT cache, so there is no need to implement
flush_icache_page function.

The function flush_icache_user_range hasn't been used, so just
remove it.

The function flush_cache_range is not necessary for PIPT cache when
tlb mapping changed.

Signed-off-by: default avatarGuo Ren <guoren@linux.alibaba.com>
parent 761b4f69

arch/csky/abiv1/inc/abi/cacheflush.h

+0 −3
Original line number Diff line number Diff line
@@ -49,9 +49,6 @@ extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, u 
#define flush_icache_page(vma, page)		do {} while (0);

#define flush_icache_range(start, end)		cache_wbinv_range(start, end)



#define flush_icache_user_range(vma,page,addr,len) \

	flush_dcache_page(page)



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

do { \

	memcpy(dst, src, len); \

arch/csky/abiv2/cacheflush.c

+0 −23
Original line number Diff line number Diff line
@@ -6,29 +6,6 @@ 
#include <linux/mm.h>

#include <asm/cache.h>



void flush_icache_page(struct vm_area_struct *vma, struct page *page)

{

	unsigned long start;



	start = (unsigned long) kmap_atomic(page);



	cache_wbinv_range(start, start + PAGE_SIZE);



	kunmap_atomic((void *)start);

}



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

			     unsigned long vaddr, int len)

{

	unsigned long kaddr;



	kaddr = (unsigned long) kmap_atomic(page) + (vaddr & ~PAGE_MASK);



	cache_wbinv_range(kaddr, kaddr + len);



	kunmap_atomic((void *)kaddr);

}



void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,

		      pte_t *pte)

{

arch/csky/abiv2/inc/abi/cacheflush.h

+2 −11
Original line number Diff line number Diff line
@@ -13,25 +13,16 @@ 
#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 { \

		if (vma->vm_flags & VM_EXEC) \

			icache_inv_all(); \

	} while (0)



#define flush_cache_range(vma, start, end)	do { } while (0)

#define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0

#define flush_dcache_page(page)			do { } while (0)

#define flush_dcache_mmap_lock(mapping)		do { } while (0)

#define flush_dcache_mmap_unlock(mapping)	do { } while (0)

#define flush_icache_page(vma, page)		do { } while (0)



#define flush_icache_range(start, end)		cache_wbinv_range(start, end)



void flush_icache_page(struct vm_area_struct *vma, struct page *page);

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

			     unsigned long vaddr, int len);



#define flush_cache_vmap(start, end)		do { } while (0)

#define flush_cache_vunmap(start, end)		do { } while (0)