C++ (Cpp) __flush_dcache_range示例

示例#1

文件： cache.c 项目： JamesChenFromChina/linux

void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
		unsigned long vaddr, void *dst, const void *src,
		unsigned long len)
{
	unsigned long phys = page_to_phys(page);
	unsigned long alias = !(DCACHE_ALIAS_EQ(vaddr, phys));

	/* Flush and invalidate user page if aliased. */

	if (alias) {
		unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
		__flush_invalidate_dcache_page_alias(t, phys);
	}

	/* Copy data */
	
	memcpy(dst, src, len);

	/*
	 * Flush and invalidate kernel page if aliased and synchronize 
	 * data and instruction caches for executable pages. 
	 */

	if (alias) {
		unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);

		__flush_invalidate_dcache_range((unsigned long) dst, len);
		if ((vma->vm_flags & VM_EXEC) != 0)
			__invalidate_icache_page_alias(t, phys);

	} else if ((vma->vm_flags & VM_EXEC) != 0) {
		__flush_dcache_range((unsigned long)dst,len);
		__invalidate_icache_range((unsigned long) dst, len);
	}
}

示例#2

文件： cache.c 项目： DirtyDroidX/android_kernel_htc_m8ul

void copy_to_user_page(struct vm_area_struct *vma, struct page *page, 
		unsigned long vaddr, void *dst, const void *src,
		unsigned long len)
{
	unsigned long phys = page_to_phys(page);
	unsigned long alias = !(DCACHE_ALIAS_EQ(vaddr, phys));

	

	if (alias) {
		unsigned long temp = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
		__flush_invalidate_dcache_page_alias(temp, phys);
	}

	
	
	memcpy(dst, src, len);


	if (alias) {
		unsigned long temp = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);

		__flush_invalidate_dcache_range((unsigned long) dst, len);
		if ((vma->vm_flags & VM_EXEC) != 0) {
			__invalidate_icache_page_alias(temp, phys);
		}

	} else if ((vma->vm_flags & VM_EXEC) != 0) {
		__flush_dcache_range((unsigned long)dst,len);
		__invalidate_icache_range((unsigned long) dst, len);
	}
}