コード例 #1
0
ファイル: init.c プロジェクト: antonywcl/AR-5315u_PLD
/*
 * paging_init() sets up the page tables - in fact we've already done this.
 */
static void __init paging_init(void)
{
	int i;
	unsigned long zones_size[MAX_NR_ZONES];

	/*
	 * old: we can DMA to/from any address.put all page into ZONE_DMA
	 * We use only ZONE_NORMAL
	 */
	zones_size[ZONE_NORMAL] = max_mapnr;

	/* every other zones are empty */
	for (i = 1; i < MAX_NR_ZONES; i++)
		zones_size[i] = 0;

	free_area_init(zones_size);
}
コード例 #2
0
ファイル: init.c プロジェクト: 110440/fastsocket
/*
 * paging_init() continues the virtual memory environment setup which
 * was begun by the code in arch/head.S.
 * The parameters are pointers to where to stick the starting and ending
 * addresses of available kernel virtual memory.
 */
void __init paging_init(void)
{
	/*
	 * Make sure start_mem is page aligned, otherwise bootmem and
	 * page_alloc get different views of the world.
	 */
#ifdef DEBUG
	unsigned long start_mem = PAGE_ALIGN(memory_start);
#endif
	unsigned long end_mem   = memory_end & PAGE_MASK;

#ifdef DEBUG
	printk (KERN_DEBUG "start_mem is %#lx\nvirtual_end is %#lx\n",
		start_mem, end_mem);
#endif

	/*
	 * Initialize the bad page table and bad page to point
	 * to a couple of allocated pages.
	 */
	empty_bad_page_table = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
	empty_bad_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
	empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
	memset((void *)empty_zero_page, 0, PAGE_SIZE);

	/*
	 * Set up SFC/DFC registers (user data space).
	 */
	set_fs (USER_DS);

#ifdef DEBUG
	printk (KERN_DEBUG "before free_area_init\n");

	printk (KERN_DEBUG "free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n",
		start_mem, end_mem);
#endif

	{
		unsigned long zones_size[MAX_NR_ZONES] = {0, };

		zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
		free_area_init(zones_size);
	}
}
コード例 #3
0
ファイル: init.c プロジェクト: Antonio-Zhou/Linux-2.6.11
/*
 * paging_init() continues the virtual memory environment setup which
 * was begun by the code in arch/head.S.
 * The parameters are pointers to where to stick the starting and ending
 * addresses  of available kernel virtual memory.
 */
void __init paging_init(void)
{
	unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0};

	/* allocate some pages for kernel housekeeping tasks */
	empty_bad_page_table	= (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
	empty_bad_page		= (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
	empty_zero_page		= (unsigned long) alloc_bootmem_pages(PAGE_SIZE);

	memset((void *) empty_zero_page, 0, PAGE_SIZE);

#if CONFIG_HIGHMEM
	if (num_physpages - num_mappedpages) {
		pgd_t *pge;
		pud_t *pue;
		pmd_t *pme;

		pkmap_page_table = alloc_bootmem_pages(PAGE_SIZE);

		memset(pkmap_page_table, 0, PAGE_SIZE);

		pge = swapper_pg_dir + pgd_index_k(PKMAP_BASE);
		pue = pud_offset(pge, PKMAP_BASE);
		pme = pmd_offset(pue, PKMAP_BASE);
		__set_pmd(pme, virt_to_phys(pkmap_page_table) | _PAGE_TABLE);
	}
#endif

	/* distribute the allocatable pages across the various zones and pass them to the allocator
	 */
	zones_size[ZONE_DMA]     = max_low_pfn - min_low_pfn;
	zones_size[ZONE_NORMAL]  = 0;
#ifdef CONFIG_HIGHMEM
	zones_size[ZONE_HIGHMEM] = num_physpages - num_mappedpages;
#endif

	free_area_init(zones_size);

#ifdef CONFIG_MMU
	/* initialise init's MMU context */
	init_new_context(&init_task, &init_mm);
#endif

} /* end paging_init() */
コード例 #4
0
ファイル: init_no.c プロジェクト: 7L/pi_plus
/*
 * paging_init() continues the virtual memory environment setup which
 * was begun by the code in arch/head.S.
 * The parameters are pointers to where to stick the starting and ending
 * addresses of available kernel virtual memory.
 */
void __init paging_init(void)
{
	/*
	 * Make sure start_mem is page aligned, otherwise bootmem and
	 * page_alloc get different views of the world.
	 */
	unsigned long end_mem   = memory_end & PAGE_MASK;
	unsigned long zones_size[MAX_NR_ZONES] = {0, };

	empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
	memset(empty_zero_page, 0, PAGE_SIZE);

	/*
	 * Set up SFC/DFC registers (user data space).
	 */
	set_fs (USER_DS);

	zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
	free_area_init(zones_size);
}
コード例 #5
0
ファイル: init.c プロジェクト: 0x000000FF/Linux4Edison
/*
 * paging_init() continues the virtual memory environment setup which
 * was begun by the code in arch/head.S.
 * The parameters are pointers to where to stick the starting and ending
 * addresses  of available kernel virtual memory.
 */
void __init paging_init(void)
{
	struct pglist_data *pgdat = NODE_DATA(0);
	unsigned long zones_size[MAX_NR_ZONES] = {0, };

	empty_zero_page      = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
	memset((void *)empty_zero_page, 0, PAGE_SIZE);

	/*
	 * Set up user data space
	 */
	set_fs(KERNEL_DS);

	/*
	 * Define zones
	 */
	zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
	pgdat->node_zones[ZONE_NORMAL].zone_start_pfn =
		__pa(PAGE_OFFSET) >> PAGE_SHIFT;

	free_area_init(zones_size);
}
コード例 #6
0
ファイル: init.c プロジェクト: FireBurn/linux
/*
 * paging_init() continues the virtual memory environment setup which
 * was begun by the code in arch/head.S.
 * The parameters are pointers to where to stick the starting and ending
 * addresses of available kernel virtual memory.
 */
void __init paging_init(void)
{
	/*
	 * Make sure start_mem is page aligned,  otherwise bootmem and
	 * page_alloc get different views og the world.
	 */
	unsigned long start_mem = PAGE_ALIGN(memory_start);
	unsigned long end_mem   = memory_end & PAGE_MASK;

	pr_debug("start_mem is %#lx\nvirtual_end is %#lx\n",
		 start_mem, end_mem);

	/*
	 * Initialize the bad page table and bad page to point
	 * to a couple of allocated pages.
	 */
	empty_zero_page = (unsigned long)memblock_alloc(PAGE_SIZE, PAGE_SIZE);
	if (!empty_zero_page)
		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
		      __func__, PAGE_SIZE, PAGE_SIZE);

	/*
	 * Set up SFC/DFC registers (user data space).
	 */
	set_fs(USER_DS);

	pr_debug("before free_area_init\n");

	pr_debug("free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n",
		 start_mem, end_mem);

	{
		unsigned long zones_size[MAX_NR_ZONES] = {0, };

		zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
		free_area_init(zones_size);
	}
}
コード例 #7
0
ファイル: init.c プロジェクト: tmatsuya/milkymist-linux
/*
 * paging_init() continues the virtual memory environment setup which
 * was begun by the code in arch/head.S.
 * The parameters are pointers to where to stick the starting and ending
 * addresses of available kernel virtual memory.
 */
void __init paging_init(void)
{
	/*
	 * Make sure start_mem is page aligned, otherwise bootmem and
	 * page_alloc get different views of the world.
	 */
#ifdef DEBUG
	unsigned long start_mem = PAGE_ALIGN(memory_start);
#endif
	unsigned long end_mem   = memory_end & PAGE_MASK;

#ifdef DEBUG
	printk ("start_mem is %#lx\nvirtual_end is %#lx\n",
		start_mem, end_mem);
#endif

	set_fs(KERNEL_DS);

#ifdef DEBUG
	printk ("before free_area_init\n");

	printk ("free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n",
		start_mem, end_mem);
#endif

	{
		unsigned i;
		unsigned long zones_size[MAX_NR_ZONES];

		for (i = 0; i < MAX_NR_ZONES; i++)
			zones_size[i] = 0;
		zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
		free_area_init(zones_size);
	}
	printk ("after free_area_init\n");
}
コード例 #8
0
ファイル: init.c プロジェクト: rohsaini/mkunity
unsigned long paging_init(unsigned long start_mem, unsigned long end_mem)
{
	return free_area_init(start_mem, end_mem);
}
コード例 #9
0
/* now sets up tables using sun3 PTEs rather than i386 as before. --m */
void __init paging_init(void)
{
	pgd_t * pg_dir;
	pte_t * pg_table;
	int i;
	unsigned long address;
	unsigned long next_pgtable;
	unsigned long bootmem_end;
	unsigned long zones_size[3] = {0, 0, 0};
	unsigned long size;


#ifdef TEST_VERIFY_AREA
	wp_works_ok = 0;
#endif
	empty_bad_page_table = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
	empty_bad_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
	empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
	memset((void *)empty_zero_page, 0, PAGE_SIZE);

	address = PAGE_OFFSET;
	pg_dir = swapper_pg_dir;
	memset (swapper_pg_dir, 0, sizeof (swapper_pg_dir));
	memset (kernel_pg_dir,  0, sizeof (kernel_pg_dir));

	size = num_pages * sizeof(pte_t);
	size = (size + PAGE_SIZE) & ~(PAGE_SIZE-1);
	
	next_pgtable = (unsigned long)alloc_bootmem_pages(size);
	bootmem_end = (next_pgtable + size + PAGE_SIZE) & PAGE_MASK;

	/* Map whole memory from PAGE_OFFSET (0x0E000000) */
	pg_dir += PAGE_OFFSET >> PGDIR_SHIFT; 

	while (address < (unsigned long)high_memory) {
		pg_table = (pte_t *) __pa (next_pgtable);
		next_pgtable += PTRS_PER_PTE * sizeof (pte_t);
		pgd_val(*pg_dir) = (unsigned long) pg_table;
		pg_dir++;

		/* now change pg_table to kernel virtual addresses */
		pg_table = (pte_t *) __va ((unsigned long) pg_table);
		for (i=0; i<PTRS_PER_PTE; ++i, ++pg_table) {
			pte_t pte = __mk_pte(address, PAGE_INIT);
			if (address >= (unsigned long)high_memory)
				pte_val (pte) = 0;
			set_pte (pg_table, pte);
			address += PAGE_SIZE;
		}
	}

	mmu_emu_init(bootmem_end);

	current->mm = NULL;

	/* memory sizing is a hack stolen from motorola.c..  hope it works for us */
	zones_size[0] = ((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
	zones_size[1] = 0;
	
	free_area_init(zones_size);

}