[net-next-2.6.git] / arch / sh / mm / init.c

/*
 * linux/arch/sh/mm/init.c
 *
 *  Copyright (C) 1999  Niibe Yutaka
 *  Copyright (C) 2002 - 2007  Paul Mundt
 *
 *  Based on linux/arch/i386/mm/init.c:
 *   Copyright (C) 1995  Linus Torvalds
 */
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/proc_fs.h>
#include <linux/pagemap.h>
#include <linux/percpu.h>
#include <linux/io.h>
#include <asm/mmu_context.h>
#include <asm/tlb.h>
#include <asm/cacheflush.h>
#include <asm/sections.h>
#include <asm/cache.h>

DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
pgd_t swapper_pg_dir[PTRS_PER_PGD];

#ifdef CONFIG_SUPERH32
/*
 * Handle trivial transitions between cached and uncached
 * segments, making use of the 1:1 mapping relationship in
 * 512MB lowmem.
 *
 * This is the offset of the uncached section from its cached alias.
 * Default value only valid in 29 bit mode, in 32bit mode will be
 * overridden in pmb_init.
 */
unsigned long cached_to_uncached = P2SEG - P1SEG;
#endif

#ifdef CONFIG_MMU
static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
{
	pgd_t *pgd;
	pud_t *pud;
	pmd_t *pmd;
	pte_t *pte;

	pgd = pgd_offset_k(addr);
	if (pgd_none(*pgd)) {
		pgd_ERROR(*pgd);
		return;
	}

	pud = pud_alloc(NULL, pgd, addr);
	if (unlikely(!pud)) {
		pud_ERROR(*pud);
		return;
	}

	pmd = pmd_alloc(NULL, pud, addr);
	if (unlikely(!pmd)) {
		pmd_ERROR(*pmd);
		return;
	}

	pte = pte_offset_kernel(pmd, addr);
	if (!pte_none(*pte)) {
		pte_ERROR(*pte);
		return;
	}

	set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot));
	local_flush_tlb_one(get_asid(), addr);
}

/*
 * As a performance optimization, other platforms preserve the fixmap mapping
 * across a context switch, we don't presently do this, but this could be done
 * in a similar fashion as to the wired TLB interface that sh64 uses (by way
 * of the memory mapped UTLB configuration) -- this unfortunately forces us to
 * give up a TLB entry for each mapping we want to preserve. While this may be
 * viable for a small number of fixmaps, it's not particularly useful for
 * everything and needs to be carefully evaluated. (ie, we may want this for
 * the vsyscall page).
 *
 * XXX: Perhaps add a _PAGE_WIRED flag or something similar that we can pass
 * in at __set_fixmap() time to determine the appropriate behavior to follow.
 *
 *					 -- PFM.
 */
void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
{
	unsigned long address = __fix_to_virt(idx);

	if (idx >= __end_of_fixed_addresses) {
		BUG();
		return;
	}

	set_pte_phys(address, phys, prot);
}

void __init page_table_range_init(unsigned long start, unsigned long end,
					 pgd_t *pgd_base)
{
	pgd_t *pgd;
	pud_t *pud;
	pmd_t *pmd;
	pte_t *pte;
	int i, j, k;
	unsigned long vaddr;

	vaddr = start;
	i = __pgd_offset(vaddr);
	j = __pud_offset(vaddr);
	k = __pmd_offset(vaddr);
	pgd = pgd_base + i;

	for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
		pud = (pud_t *)pgd;
		for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
			pmd = (pmd_t *)pud;
			for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
				if (pmd_none(*pmd)) {
					pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
					pmd_populate_kernel(&init_mm, pmd, pte);
					BUG_ON(pte != pte_offset_kernel(pmd, 0));
				}
				vaddr += PMD_SIZE;
			}
			k = 0;
		}
		j = 0;
	}
}
#endif	/* CONFIG_MMU */

/*
 * paging_init() sets up the page tables
 */
void __init paging_init(void)
{
	unsigned long max_zone_pfns[MAX_NR_ZONES];
	unsigned long vaddr, end;
	int nid;

	/* We don't need to map the kernel through the TLB, as
	 * it is permanatly mapped using P1. So clear the
	 * entire pgd. */
	memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));

	/* Set an initial value for the MMU.TTB so we don't have to
	 * check for a null value. */
	set_TTB(swapper_pg_dir);

	/*
	 * Populate the relevant portions of swapper_pg_dir so that
	 * we can use the fixmap entries without calling kmalloc.
	 * pte's will be filled in by __set_fixmap().
	 */
	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
	end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
	page_table_range_init(vaddr, end, swapper_pg_dir);

	kmap_coherent_init();

	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));

	for_each_online_node(nid) {
		pg_data_t *pgdat = NODE_DATA(nid);
		unsigned long low, start_pfn;

		start_pfn = pgdat->bdata->node_min_pfn;
		low = pgdat->bdata->node_low_pfn;

		if (max_zone_pfns[ZONE_NORMAL] < low)
			max_zone_pfns[ZONE_NORMAL] = low;

		printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n",
		       nid, start_pfn, low);
	}

	free_area_init_nodes(max_zone_pfns);

	/* Set up the uncached fixmap */
	set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start));
}

static struct kcore_list kcore_mem;

void __init mem_init(void)
{
	int codesize, datasize, initsize;
	int nid;

	num_physpages = 0;
	high_memory = NULL;

	for_each_online_node(nid) {
		pg_data_t *pgdat = NODE_DATA(nid);
		unsigned long node_pages = 0;
		void *node_high_memory;

		num_physpages += pgdat->node_present_pages;

		if (pgdat->node_spanned_pages)
			node_pages = free_all_bootmem_node(pgdat);

		totalram_pages += node_pages;

		node_high_memory = (void *)__va((pgdat->node_start_pfn +
						 pgdat->node_spanned_pages) <<
						 PAGE_SHIFT);
		if (node_high_memory > high_memory)
			high_memory = node_high_memory;
	}

	/* Set this up early, so we can take care of the zero page */
	cpu_cache_init();

	/* clear the zero-page */
	memset(empty_zero_page, 0, PAGE_SIZE);
	__flush_wback_region(empty_zero_page, PAGE_SIZE);

	codesize =  (unsigned long) &_etext - (unsigned long) &_text;
	datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
	initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;

	kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);

	printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
	       "%dk data, %dk init)\n",
		nr_free_pages() << (PAGE_SHIFT-10),
		num_physpages << (PAGE_SHIFT-10),
		codesize >> 10,
		datasize >> 10,
		initsize >> 10);

	/* Initialize the vDSO */
	vsyscall_init();
}

void free_initmem(void)
{
	unsigned long addr;

	addr = (unsigned long)(&__init_begin);
	for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
		ClearPageReserved(virt_to_page(addr));
		init_page_count(virt_to_page(addr));
		free_page(addr);
		totalram_pages++;
	}
	printk("Freeing unused kernel memory: %ldk freed\n",
	       ((unsigned long)&__init_end -
	        (unsigned long)&__init_begin) >> 10);
}

#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
	unsigned long p;
	for (p = start; p < end; p += PAGE_SIZE) {
		ClearPageReserved(virt_to_page(p));
		init_page_count(virt_to_page(p));
		free_page(p);
		totalram_pages++;
	}
	printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
}
#endif

#if THREAD_SHIFT < PAGE_SHIFT
static struct kmem_cache *thread_info_cache;

struct thread_info *alloc_thread_info(struct task_struct *tsk)
{
	struct thread_info *ti;

	ti = kmem_cache_alloc(thread_info_cache, GFP_KERNEL);
	if (unlikely(ti == NULL))
		return NULL;
#ifdef CONFIG_DEBUG_STACK_USAGE
	memset(ti, 0, THREAD_SIZE);
#endif
	return ti;
}

void free_thread_info(struct thread_info *ti)
{
	kmem_cache_free(thread_info_cache, ti);
}

void thread_info_cache_init(void)
{
	thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,
					      THREAD_SIZE, 0, NULL);
	BUG_ON(thread_info_cache == NULL);
}
#endif /* THREAD_SHIFT < PAGE_SHIFT */

#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size)
{
	pg_data_t *pgdat;
	unsigned long start_pfn = start >> PAGE_SHIFT;
	unsigned long nr_pages = size >> PAGE_SHIFT;
	int ret;

	pgdat = NODE_DATA(nid);

	/* We only have ZONE_NORMAL, so this is easy.. */
	ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL,
				start_pfn, nr_pages);
	if (unlikely(ret))
		printk("%s: Failed, __add_pages() == %d\n", __func__, ret);

	return ret;
}
EXPORT_SYMBOL_GPL(arch_add_memory);

#ifdef CONFIG_NUMA
int memory_add_physaddr_to_nid(u64 addr)
{
	/* Node 0 for now.. */
	return 0;
}
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
#endif /* CONFIG_MEMORY_HOTPLUG */
Commit	Line	Data
01066625 PM	1	/*
01066625 PM	2	* linux/arch/sh/mm/init.c
1da177e4 LT	3	*
1da177e4 LT	4	* Copyright (C) 1999 Niibe Yutaka
01066625	5	* Copyright (C) 2002 - 2007 Paul Mundt
1da177e4 LT	6	*
	7	* Based on linux/arch/i386/mm/init.c:
	8	* Copyright (C) 1995 Linus Torvalds
	9	*/
1da177e4 LT	10	#include <linux/mm.h>
1da177e4 LT	11	#include <linux/swap.h>
1da177e4	12	#include <linux/init.h>
1da177e4	13	#include <linux/bootmem.h>
2cb7ce3b	14	#include <linux/proc_fs.h>
27641dee	15	#include <linux/pagemap.h>
01066625 PM	16	#include <linux/percpu.h>
01066625 PM	17	#include <linux/io.h>
1da177e4	18	#include <asm/mmu_context.h>
1da177e4 LT	19	#include <asm/tlb.h>
1da177e4 LT	20	#include <asm/cacheflush.h>
07cbb41b	21	#include <asm/sections.h>
1da177e4 LT	22	#include <asm/cache.h>
	23
	24	DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
	25	pgd_t swapper_pg_dir[PTRS_PER_PGD];
c6feb614 SM	26
	27	#ifdef CONFIG_SUPERH32
	28	/*
	29	* Handle trivial transitions between cached and uncached
	30	* segments, making use of the 1:1 mapping relationship in
	31	* 512MB lowmem.
	32	*
	33	* This is the offset of the uncached section from its cached alias.
	34	* Default value only valid in 29 bit mode, in 32bit mode will be
	35	* overridden in pmb_init.
	36	*/
	37	unsigned long cached_to_uncached = P2SEG - P1SEG;
	38	#endif
1da177e4	39
11cbb70e	40	#ifdef CONFIG_MMU
1da177e4 LT	41	static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
	42	{
	43	pgd_t *pgd;
26ff6c11	44	pud_t *pud;
1da177e4 LT	45	pmd_t *pmd;
	46	pte_t *pte;
	47
99a596f9	48	pgd = pgd_offset_k(addr);
1da177e4 LT	49	if (pgd_none(*pgd)) {
	50	pgd_ERROR(*pgd);
	51	return;
	52	}
	53
99a596f9 SM	54	pud = pud_alloc(NULL, pgd, addr);
	55	if (unlikely(!pud)) {
	56	pud_ERROR(*pud);
	57	return;
26ff6c11 PM	58	}
26ff6c11 PM	59
99a596f9 SM	60	pmd = pmd_alloc(NULL, pud, addr);
	61	if (unlikely(!pmd)) {
	62	pmd_ERROR(*pmd);
	63	return;
1da177e4 LT	64	}
	65
	66	pte = pte_offset_kernel(pmd, addr);
	67	if (!pte_none(*pte)) {
	68	pte_ERROR(*pte);
	69	return;
	70	}
	71
	72	set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot));
997d0030	73	local_flush_tlb_one(get_asid(), addr);
1da177e4 LT	74	}
	75
	76	/*
	77	* As a performance optimization, other platforms preserve the fixmap mapping
	78	* across a context switch, we don't presently do this, but this could be done
	79	* in a similar fashion as to the wired TLB interface that sh64 uses (by way
e868d612	80	* of the memory mapped UTLB configuration) -- this unfortunately forces us to
1da177e4 LT	81	* give up a TLB entry for each mapping we want to preserve. While this may be
	82	* viable for a small number of fixmaps, it's not particularly useful for
	83	* everything and needs to be carefully evaluated. (ie, we may want this for
	84	* the vsyscall page).
	85	*
	86	* XXX: Perhaps add a _PAGE_WIRED flag or something similar that we can pass
	87	* in at __set_fixmap() time to determine the appropriate behavior to follow.
	88	*
	89	* -- PFM.
	90	*/
	91	void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
	92	{
	93	unsigned long address = __fix_to_virt(idx);
	94
	95	if (idx >= __end_of_fixed_addresses) {
	96	BUG();
	97	return;
	98	}
	99
	100	set_pte_phys(address, phys, prot);
	101	}
2adb4e10 SM	102
	103	void __init page_table_range_init(unsigned long start, unsigned long end,
	104	pgd_t *pgd_base)
	105	{
	106	pgd_t *pgd;
	107	pud_t *pud;
	108	pmd_t *pmd;
0906a3ad PM	109	pte_t *pte;
0906a3ad PM	110	int i, j, k;
2adb4e10 SM	111	unsigned long vaddr;
2adb4e10 SM	112
0906a3ad PM	113	vaddr = start;
	114	i = __pgd_offset(vaddr);
	115	j = __pud_offset(vaddr);
	116	k = __pmd_offset(vaddr);
	117	pgd = pgd_base + i;
	118
	119	for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
	120	pud = (pud_t *)pgd;
	121	for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
	122	pmd = (pmd_t *)pud;
	123	for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
	124	if (pmd_none(*pmd)) {
	125	pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
	126	pmd_populate_kernel(&init_mm, pmd, pte);
	127	BUG_ON(pte != pte_offset_kernel(pmd, 0));
	128	}
	129	vaddr += PMD_SIZE;
	130	}
	131	k = 0;
2adb4e10	132	}
0906a3ad	133	j = 0;
2adb4e10 SM	134	}
2adb4e10 SM	135	}
11cbb70e	136	#endif /* CONFIG_MMU */
1da177e4	137
1da177e4 LT	138	/*
1da177e4 LT	139	* paging_init() sets up the page tables
1da177e4 LT	140	*/
	141	void __init paging_init(void)
	142	{
2de212eb	143	unsigned long max_zone_pfns[MAX_NR_ZONES];
0906a3ad	144	unsigned long vaddr, end;
01066625	145	int nid;
1da177e4	146
01066625 PM	147	/* We don't need to map the kernel through the TLB, as
	148	* it is permanatly mapped using P1. So clear the
	149	* entire pgd. */
	150	memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));
1da177e4	151
6e4662ff SM	152	/* Set an initial value for the MMU.TTB so we don't have to
	153	* check for a null value. */
	154	set_TTB(swapper_pg_dir);
	155
acca4f4d PM	156	/*
acca4f4d PM	157	* Populate the relevant portions of swapper_pg_dir so that
2adb4e10	158	* we can use the fixmap entries without calling kmalloc.
acca4f4d PM	159	* pte's will be filled in by __set_fixmap().
	160	*/
	161	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
0906a3ad PM	162	end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
0906a3ad PM	163	page_table_range_init(vaddr, end, swapper_pg_dir);
acca4f4d PM	164
acca4f4d PM	165	kmap_coherent_init();
2adb4e10	166
2de212eb PM	167	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
2de212eb PM	168
01066625 PM	169	for_each_online_node(nid) {
01066625 PM	170	pg_data_t *pgdat = NODE_DATA(nid);
01066625 PM	171	unsigned long low, start_pfn;
01066625 PM	172
3560e249	173	start_pfn = pgdat->bdata->node_min_pfn;
01066625 PM	174	low = pgdat->bdata->node_low_pfn;
01066625 PM	175
2de212eb PM	176	if (max_zone_pfns[ZONE_NORMAL] < low)
2de212eb PM	177	max_zone_pfns[ZONE_NORMAL] = low;
01066625 PM	178
	179	printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n",
	180	nid, start_pfn, low);
01066625	181	}
2de212eb PM	182
2de212eb PM	183	free_area_init_nodes(max_zone_pfns);
cbaa118e SM	184
	185	/* Set up the uncached fixmap */
	186	set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start));
1da177e4 LT	187	}
1da177e4 LT	188
a0614da8	189	static struct kcore_list kcore_mem;
2cb7ce3b	190
1da177e4 LT	191	void __init mem_init(void)
1da177e4 LT	192	{
dfbb9042	193	int codesize, datasize, initsize;
01066625	194	int nid;
1da177e4	195
2de212eb PM	196	num_physpages = 0;
	197	high_memory = NULL;
	198
01066625 PM	199	for_each_online_node(nid) {
	200	pg_data_t *pgdat = NODE_DATA(nid);
	201	unsigned long node_pages = 0;
	202	void *node_high_memory;
01066625 PM	203
	204	num_physpages += pgdat->node_present_pages;
	205
	206	if (pgdat->node_spanned_pages)
	207	node_pages = free_all_bootmem_node(pgdat);
	208
	209	totalram_pages += node_pages;
1da177e4	210
2de212eb PM	211	node_high_memory = (void *)__va((pgdat->node_start_pfn +
	212	pgdat->node_spanned_pages) <<
	213	PAGE_SHIFT);
01066625 PM	214	if (node_high_memory > high_memory)
	215	high_memory = node_high_memory;
	216	}
1da177e4	217
37443ef3 PM	218	/* Set this up early, so we can take care of the zero page */
	219	cpu_cache_init();
	220
1da177e4 LT	221	/* clear the zero-page */
	222	memset(empty_zero_page, 0, PAGE_SIZE);
	223	__flush_wback_region(empty_zero_page, PAGE_SIZE);
	224
1da177e4 LT	225	codesize = (unsigned long) &_etext - (unsigned long) &_text;
	226	datasize = (unsigned long) &_edata - (unsigned long) &_etext;
	227	initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
	228
c30bb2a2	229	kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
2cb7ce3b PM	230
2cb7ce3b PM	231	printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
dfbb9042	232	"%dk data, %dk init)\n",
cc013a88	233	nr_free_pages() << (PAGE_SHIFT-10),
2de212eb	234	num_physpages << (PAGE_SHIFT-10),
1da177e4	235	codesize >> 10,
1da177e4 LT	236	datasize >> 10,
	237	initsize >> 10);
	238
19f9a34f PM	239	/* Initialize the vDSO */
19f9a34f PM	240	vsyscall_init();
1da177e4 LT	241	}
	242
	243	void free_initmem(void)
	244	{
	245	unsigned long addr;
65463b73	246
1da177e4 LT	247	addr = (unsigned long)(&__init_begin);
	248	for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
	249	ClearPageReserved(virt_to_page(addr));
7835e98b	250	init_page_count(virt_to_page(addr));
1da177e4 LT	251	free_page(addr);
	252	totalram_pages++;
	253	}
07cbb41b PM	254	printk("Freeing unused kernel memory: %ldk freed\n",
	255	((unsigned long)&__init_end -
	256	(unsigned long)&__init_begin) >> 10);
1da177e4 LT	257	}
	258
	259	#ifdef CONFIG_BLK_DEV_INITRD
	260	void free_initrd_mem(unsigned long start, unsigned long end)
	261	{
	262	unsigned long p;
	263	for (p = start; p < end; p += PAGE_SIZE) {
	264	ClearPageReserved(virt_to_page(p));
7835e98b	265	init_page_count(virt_to_page(p));
1da177e4 LT	266	free_page(p);
	267	totalram_pages++;
	268	}
2de212eb	269	printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
1da177e4 LT	270	}
1da177e4 LT	271	#endif
33d63bd8	272
c15c5f8c PM	273	#if THREAD_SHIFT < PAGE_SHIFT
	274	static struct kmem_cache *thread_info_cache;
	275
	276	struct thread_info alloc_thread_info(struct task_struct tsk)
	277	{
	278	struct thread_info *ti;
	279
	280	ti = kmem_cache_alloc(thread_info_cache, GFP_KERNEL);
	281	if (unlikely(ti == NULL))
	282	return NULL;
	283	#ifdef CONFIG_DEBUG_STACK_USAGE
	284	memset(ti, 0, THREAD_SIZE);
	285	#endif
	286	return ti;
	287	}
	288
	289	void free_thread_info(struct thread_info *ti)
	290	{
	291	kmem_cache_free(thread_info_cache, ti);
	292	}
	293
	294	void thread_info_cache_init(void)
	295	{
	296	thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,
	297	THREAD_SIZE, 0, NULL);
	298	BUG_ON(thread_info_cache == NULL);
	299	}
	300	#endif /* THREAD_SHIFT < PAGE_SHIFT */
	301
33d63bd8	302	#ifdef CONFIG_MEMORY_HOTPLUG
33d63bd8 PM	303	int arch_add_memory(int nid, u64 start, u64 size)
	304	{
	305	pg_data_t *pgdat;
	306	unsigned long start_pfn = start >> PAGE_SHIFT;
	307	unsigned long nr_pages = size >> PAGE_SHIFT;
	308	int ret;
	309
	310	pgdat = NODE_DATA(nid);
	311
	312	/* We only have ZONE_NORMAL, so this is easy.. */
c04fc586 GH	313	ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL,
c04fc586 GH	314	start_pfn, nr_pages);
33d63bd8	315	if (unlikely(ret))
866e6b9e	316	printk("%s: Failed, __add_pages() == %d\n", __func__, ret);
33d63bd8 PM	317
	318	return ret;
	319	}
	320	EXPORT_SYMBOL_GPL(arch_add_memory);
	321
357d5946	322	#ifdef CONFIG_NUMA
33d63bd8 PM	323	int memory_add_physaddr_to_nid(u64 addr)
	324	{
	325	/* Node 0 for now.. */
	326	return 0;
	327	}
	328	EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
	329	#endif
3159e7d6	330	#endif /* CONFIG_MEMORY_HOTPLUG */