C++ (Cpp) kmap_high Examples

Example #1

File: highmem-xen.c Project: dduval/kernel-rhel4

void *kmap(struct page *page)
{
	might_sleep();
	if (page < highmem_start_page)
		return page_address(page);
	return kmap_high(page);
}

Example #2

void *kmap(struct page *page)
{
	might_sleep();
	if (!PageHighMem(page))
		return page_address(page);
	return kmap_high(page);
}

Example #3

File: highmem.c Project: idtek/linux-2.6.11

void *kmap(struct page *page)//½¨Á¢ÓÀ¾ÃÄÚºËÓ³Éä¡£
{
	might_sleep();
	if (!PageHighMem(page))
		return page_address(page);
	return kmap_high(page);
}

Example #4

File: highmem.c Project: chl4651/HEAPO

void *kmap(struct page *page)
{
	might_sleep();
	//POS (Cheolhee Lee)
	if (!(PageHighMem(page) || PageNVRAM(page)))
		return page_address(page);
	return kmap_high(page);
}

Example #5

File: highmem.c Project: Mellanox/linux

void *kmap(struct page *page)
{
	BUG_ON(in_interrupt());
	if (!PageHighMem(page))
		return page_address(page);

	return kmap_high(page);
}

Example #6

File: highmem.c Project: Einheri/wl500g

void *__kmap(struct page *page)
{
	void *addr;

	might_sleep();
	if (!PageHighMem(page))
		return page_address(page);
	addr = kmap_high(page);
	flush_tlb_one((unsigned long)addr);

	return addr;
}

Example #7

File: highmem.c Project: 12019/hg556a_source

void *__kmap(struct page *page)
{
	void *addr;

	might_sleep();
	if (page < highmem_start_page)
		return page_address(page);
	addr = kmap_high(page);
	flush_tlb_one((unsigned long)addr);

	return addr;
}

Example #8

File: highmem.c Project: sarnobat/knoppix

void *kmap(struct page *page)
{
	void *addr;

	if (in_interrupt())
		BUG();

	if (page < highmem_start_page)
		return page_address(page);
	addr = kmap_high(page);
	flush_tlb_one((unsigned long)addr);

	return addr;
}

Example #9

File: highmem.c Project: TaoAndHua/linux-2.6.11.12-comment

/**
 * 建立永久内核映射。
 */
void *kmap(struct page *page)
{
	/**
	 * kmap是允许睡眠的，意思是说不能在中断和可延迟函数中调用。
	 * 如果试图在中断中调用，那么might_sleep会触发异常。
	 */
	might_sleep();
	/**
	 * 如果页框不属于高端内存，则调用page_address直接返回线性地址。
	 */
	if (!PageHighMem(page))
		return page_address(page);
	/**
	 * 否则调用kmap_high真正建立永久内核映射。
	 */
	return kmap_high(page);
}

Example #10

File: kmap_high.c Project: fjrti/snippets

int __init kmap_high_init(void) 
{ 
	pages = alloc_pages(__GFP_HIGHMEM, 0); //从高端内存分配一个页 
	if(!pages) 
	{ 
		return -ENOMEM; 
	} 
	else 
	{		 
		printk("<0>alloc_pages Successfully!\npage = 0x%lx\n",(unsigned long)pages); 

        	/*调用函数kmap_high( )，将高端内存页映射到内核地址空间，返回映射的虚拟地址*/
		void * addr = kmap_high(pages);   
		printk("<0>addr = 0x%lx\n",(unsigned long)addr); 
	}	 
	return 0; 
}