[net-next-2.6.git] / arch / powerpc / mm / init_64.c

/*
 *  PowerPC version
 *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
 *
 *  Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
 *  and Cort Dougan (PReP) (cort@cs.nmt.edu)
 *    Copyright (C) 1996 Paul Mackerras
 *
 *  Derived from "arch/i386/mm/init.c"
 *    Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
 *
 *  Dave Engebretsen <engebret@us.ibm.com>
 *      Rework for PPC64 port.
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version
 *  2 of the License, or (at your option) any later version.
 *
 */

#undef DEBUG

#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/stddef.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/bootmem.h>
#include <linux/highmem.h>
#include <linux/idr.h>
#include <linux/nodemask.h>
#include <linux/module.h>
#include <linux/poison.h>
#include <linux/memblock.h>
#include <linux/hugetlb.h>
#include <linux/slab.h>

#include <asm/pgalloc.h>
#include <asm/page.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/io.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#include <asm/mmu.h>
#include <asm/uaccess.h>
#include <asm/smp.h>
#include <asm/machdep.h>
#include <asm/tlb.h>
#include <asm/eeh.h>
#include <asm/processor.h>
#include <asm/mmzone.h>
#include <asm/cputable.h>
#include <asm/sections.h>
#include <asm/system.h>
#include <asm/iommu.h>
#include <asm/abs_addr.h>
#include <asm/vdso.h>

#include "mmu_decl.h"

#ifdef CONFIG_PPC_STD_MMU_64
#if PGTABLE_RANGE > USER_VSID_RANGE
#warning Limited user VSID range means pagetable space is wasted
#endif

#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE)
#warning TASK_SIZE is smaller than it needs to be.
#endif
#endif /* CONFIG_PPC_STD_MMU_64 */

phys_addr_t memstart_addr = ~0;
EXPORT_SYMBOL_GPL(memstart_addr);
phys_addr_t kernstart_addr;
EXPORT_SYMBOL_GPL(kernstart_addr);

void free_initmem(void)
{
	unsigned long addr;

	addr = (unsigned long)__init_begin;
	for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
		memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
		ClearPageReserved(virt_to_page(addr));
		init_page_count(virt_to_page(addr));
		free_page(addr);
		totalram_pages++;
	}
	printk ("Freeing unused kernel memory: %luk 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)
{
	if (start < end)
		printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
	for (; start < end; start += PAGE_SIZE) {
		ClearPageReserved(virt_to_page(start));
		init_page_count(virt_to_page(start));
		free_page(start);
		totalram_pages++;
	}
}
#endif

static void pgd_ctor(void *addr)
{
	memset(addr, 0, PGD_TABLE_SIZE);
}

static void pmd_ctor(void *addr)
{
	memset(addr, 0, PMD_TABLE_SIZE);
}

struct kmem_cache *pgtable_cache[MAX_PGTABLE_INDEX_SIZE];

/*
 * Create a kmem_cache() for pagetables.  This is not used for PTE
 * pages - they're linked to struct page, come from the normal free
 * pages pool and have a different entry size (see real_pte_t) to
 * everything else.  Caches created by this function are used for all
 * the higher level pagetables, and for hugepage pagetables.
 */
void pgtable_cache_add(unsigned shift, void (*ctor)(void *))
{
	char *name;
	unsigned long table_size = sizeof(void *) << shift;
	unsigned long align = table_size;

	/* When batching pgtable pointers for RCU freeing, we store
	 * the index size in the low bits.  Table alignment must be
	 * big enough to fit it.
	 *
	 * Likewise, hugeapge pagetable pointers contain a (different)
	 * shift value in the low bits.  All tables must be aligned so
	 * as to leave enough 0 bits in the address to contain it. */
	unsigned long minalign = max(MAX_PGTABLE_INDEX_SIZE + 1,
				     HUGEPD_SHIFT_MASK + 1);
	struct kmem_cache *new;

	/* It would be nice if this was a BUILD_BUG_ON(), but at the
	 * moment, gcc doesn't seem to recognize is_power_of_2 as a
	 * constant expression, so so much for that. */
	BUG_ON(!is_power_of_2(minalign));
	BUG_ON((shift < 1) || (shift > MAX_PGTABLE_INDEX_SIZE));

	if (PGT_CACHE(shift))
		return; /* Already have a cache of this size */

	align = max_t(unsigned long, align, minalign);
	name = kasprintf(GFP_KERNEL, "pgtable-2^%d", shift);
	new = kmem_cache_create(name, table_size, align, 0, ctor);
	PGT_CACHE(shift) = new;

	pr_debug("Allocated pgtable cache for order %d\n", shift);
}


void pgtable_cache_init(void)
{
	pgtable_cache_add(PGD_INDEX_SIZE, pgd_ctor);
	pgtable_cache_add(PMD_INDEX_SIZE, pmd_ctor);
	if (!PGT_CACHE(PGD_INDEX_SIZE) || !PGT_CACHE(PMD_INDEX_SIZE))
		panic("Couldn't allocate pgtable caches");

	/* In all current configs, when the PUD index exists it's the
	 * same size as either the pgd or pmd index.  Verify that the
	 * initialization above has also created a PUD cache.  This
	 * will need re-examiniation if we add new possibilities for
	 * the pagetable layout. */
	BUG_ON(PUD_INDEX_SIZE && !PGT_CACHE(PUD_INDEX_SIZE));
}

#ifdef CONFIG_SPARSEMEM_VMEMMAP
/*
 * Given an address within the vmemmap, determine the pfn of the page that
 * represents the start of the section it is within.  Note that we have to
 * do this by hand as the proffered address may not be correctly aligned.
 * Subtraction of non-aligned pointers produces undefined results.
 */
static unsigned long __meminit vmemmap_section_start(unsigned long page)
{
	unsigned long offset = page - ((unsigned long)(vmemmap));

	/* Return the pfn of the start of the section. */
	return (offset / sizeof(struct page)) & PAGE_SECTION_MASK;
}

/*
 * Check if this vmemmap page is already initialised.  If any section
 * which overlaps this vmemmap page is initialised then this page is
 * initialised already.
 */
static int __meminit vmemmap_populated(unsigned long start, int page_size)
{
	unsigned long end = start + page_size;

	for (; start < end; start += (PAGES_PER_SECTION * sizeof(struct page)))
		if (pfn_valid(vmemmap_section_start(start)))
			return 1;

	return 0;
}

/* On hash-based CPUs, the vmemmap is bolted in the hash table.
 *
 * On Book3E CPUs, the vmemmap is currently mapped in the top half of
 * the vmalloc space using normal page tables, though the size of
 * pages encoded in the PTEs can be different
 */

#ifdef CONFIG_PPC_BOOK3E
static void __meminit vmemmap_create_mapping(unsigned long start,
					     unsigned long page_size,
					     unsigned long phys)
{
	/* Create a PTE encoding without page size */
	unsigned long i, flags = _PAGE_PRESENT | _PAGE_ACCESSED |
		_PAGE_KERNEL_RW;

	/* PTEs only contain page size encodings up to 32M */
	BUG_ON(mmu_psize_defs[mmu_vmemmap_psize].enc > 0xf);

	/* Encode the size in the PTE */
	flags |= mmu_psize_defs[mmu_vmemmap_psize].enc << 8;

	/* For each PTE for that area, map things. Note that we don't
	 * increment phys because all PTEs are of the large size and
	 * thus must have the low bits clear
	 */
	for (i = 0; i < page_size; i += PAGE_SIZE)
		BUG_ON(map_kernel_page(start + i, phys, flags));
}
#else /* CONFIG_PPC_BOOK3E */
static void __meminit vmemmap_create_mapping(unsigned long start,
					     unsigned long page_size,
					     unsigned long phys)
{
	int  mapped = htab_bolt_mapping(start, start + page_size, phys,
					PAGE_KERNEL, mmu_vmemmap_psize,
					mmu_kernel_ssize);
	BUG_ON(mapped < 0);
}
#endif /* CONFIG_PPC_BOOK3E */

struct vmemmap_backing *vmemmap_list;

static __meminit struct vmemmap_backing * vmemmap_list_alloc(int node)
{
	static struct vmemmap_backing *next;
	static int num_left;

	/* allocate a page when required and hand out chunks */
	if (!next || !num_left) {
		next = vmemmap_alloc_block(PAGE_SIZE, node);
		if (unlikely(!next)) {
			WARN_ON(1);
			return NULL;
		}
		num_left = PAGE_SIZE / sizeof(struct vmemmap_backing);
	}

	num_left--;

	return next++;
}

static __meminit void vmemmap_list_populate(unsigned long phys,
					    unsigned long start,
					    int node)
{
	struct vmemmap_backing *vmem_back;

	vmem_back = vmemmap_list_alloc(node);
	if (unlikely(!vmem_back)) {
		WARN_ON(1);
		return;
	}

	vmem_back->phys = phys;
	vmem_back->virt_addr = start;
	vmem_back->list = vmemmap_list;

	vmemmap_list = vmem_back;
}

int __meminit vmemmap_populate(struct page *start_page,
			       unsigned long nr_pages, int node)
{
	unsigned long start = (unsigned long)start_page;
	unsigned long end = (unsigned long)(start_page + nr_pages);
	unsigned long page_size = 1 << mmu_psize_defs[mmu_vmemmap_psize].shift;

	/* Align to the page size of the linear mapping. */
	start = _ALIGN_DOWN(start, page_size);

	pr_debug("vmemmap_populate page %p, %ld pages, node %d\n",
		 start_page, nr_pages, node);
	pr_debug(" -> map %lx..%lx\n", start, end);

	for (; start < end; start += page_size) {
		void *p;

		if (vmemmap_populated(start, page_size))
			continue;

		p = vmemmap_alloc_block(page_size, node);
		if (!p)
			return -ENOMEM;

		vmemmap_list_populate(__pa(p), start, node);

		pr_debug("      * %016lx..%016lx allocated at %p\n",
			 start, start + page_size, p);

		vmemmap_create_mapping(start, page_size, __pa(p));
	}

	return 0;
}
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
Commit	Line	Data
14cf11af PM	1	/*
	2	* PowerPC version
	3	* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
	4	*
	5	* Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
	6	* and Cort Dougan (PReP) (cort@cs.nmt.edu)
	7	* Copyright (C) 1996 Paul Mackerras
14cf11af PM	8	*
	9	* Derived from "arch/i386/mm/init.c"
	10	* Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
	11	*
	12	* Dave Engebretsen <engebret@us.ibm.com>
	13	* Rework for PPC64 port.
	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License
	17	* as published by the Free Software Foundation; either version
	18	* 2 of the License, or (at your option) any later version.
	19	*
	20	*/
	21
cec08e7a BH	22	#undef DEBUG
cec08e7a BH	23
14cf11af PM	24	#include <linux/signal.h>
	25	#include <linux/sched.h>
	26	#include <linux/kernel.h>
	27	#include <linux/errno.h>
	28	#include <linux/string.h>
	29	#include <linux/types.h>
	30	#include <linux/mman.h>
	31	#include <linux/mm.h>
	32	#include <linux/swap.h>
	33	#include <linux/stddef.h>
	34	#include <linux/vmalloc.h>
	35	#include <linux/init.h>
	36	#include <linux/delay.h>
	37	#include <linux/bootmem.h>
	38	#include <linux/highmem.h>
	39	#include <linux/idr.h>
	40	#include <linux/nodemask.h>
	41	#include <linux/module.h>
c9cf5528	42	#include <linux/poison.h>
95f72d1e	43	#include <linux/memblock.h>
a4fe3ce7	44	#include <linux/hugetlb.h>
5a0e3ad6	45	#include <linux/slab.h>
14cf11af PM	46
	47	#include <asm/pgalloc.h>
	48	#include <asm/page.h>
	49	#include <asm/prom.h>
14cf11af PM	50	#include <asm/rtas.h>
	51	#include <asm/io.h>
	52	#include <asm/mmu_context.h>
	53	#include <asm/pgtable.h>
	54	#include <asm/mmu.h>
	55	#include <asm/uaccess.h>
	56	#include <asm/smp.h>
	57	#include <asm/machdep.h>
	58	#include <asm/tlb.h>
	59	#include <asm/eeh.h>
	60	#include <asm/processor.h>
	61	#include <asm/mmzone.h>
	62	#include <asm/cputable.h>
14cf11af PM	63	#include <asm/sections.h>
	64	#include <asm/system.h>
	65	#include <asm/iommu.h>
	66	#include <asm/abs_addr.h>
	67	#include <asm/vdso.h>
800fc3ee DG	68
800fc3ee DG	69	#include "mmu_decl.h"
14cf11af	70
94491685	71	#ifdef CONFIG_PPC_STD_MMU_64
14cf11af PM	72	#if PGTABLE_RANGE > USER_VSID_RANGE
	73	#warning Limited user VSID range means pagetable space is wasted
	74	#endif
	75
	76	#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE)
	77	#warning TASK_SIZE is smaller than it needs to be.
	78	#endif
94491685	79	#endif /* CONFIG_PPC_STD_MMU_64 */
14cf11af	80
37dd2bad	81	phys_addr_t memstart_addr = ~0;
79c3095f	82	EXPORT_SYMBOL_GPL(memstart_addr);
37dd2bad	83	phys_addr_t kernstart_addr;
79c3095f	84	EXPORT_SYMBOL_GPL(kernstart_addr);
d7917ba7	85
14cf11af PM	86	void free_initmem(void)
	87	{
	88	unsigned long addr;
	89
	90	addr = (unsigned long)__init_begin;
	91	for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
c9cf5528	92	memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
14cf11af	93	ClearPageReserved(virt_to_page(addr));
7835e98b	94	init_page_count(virt_to_page(addr));
14cf11af PM	95	free_page(addr);
	96	totalram_pages++;
	97	}
	98	printk ("Freeing unused kernel memory: %luk freed\n",
	99	((unsigned long)__init_end - (unsigned long)__init_begin) >> 10);
	100	}
	101
	102	#ifdef CONFIG_BLK_DEV_INITRD
	103	void free_initrd_mem(unsigned long start, unsigned long end)
	104	{
	105	if (start < end)
	106	printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
	107	for (; start < end; start += PAGE_SIZE) {
	108	ClearPageReserved(virt_to_page(start));
7835e98b	109	init_page_count(virt_to_page(start));
14cf11af PM	110	free_page(start);
	111	totalram_pages++;
	112	}
	113	}
	114	#endif
	115
51cc5068	116	static void pgd_ctor(void *addr)
14cf11af	117	{
51cc5068 AD	118	memset(addr, 0, PGD_TABLE_SIZE);
	119	}
	120
	121	static void pmd_ctor(void *addr)
	122	{
	123	memset(addr, 0, PMD_TABLE_SIZE);
14cf11af PM	124	}
14cf11af PM	125
a0668cdc DG	126	struct kmem_cache *pgtable_cache[MAX_PGTABLE_INDEX_SIZE];
	127
	128	/*
	129	* Create a kmem_cache() for pagetables. This is not used for PTE
	130	* pages - they're linked to struct page, come from the normal free
	131	* pages pool and have a different entry size (see real_pte_t) to
	132	* everything else. Caches created by this function are used for all
	133	* the higher level pagetables, and for hugepage pagetables.
	134	*/
	135	void pgtable_cache_add(unsigned shift, void (ctor)(void ))
	136	{
	137	char *name;
	138	unsigned long table_size = sizeof(void *) << shift;
	139	unsigned long align = table_size;
	140
	141	/* When batching pgtable pointers for RCU freeing, we store
	142	* the index size in the low bits. Table alignment must be
a4fe3ce7 DG	143	* big enough to fit it.
	144	*
	145	* Likewise, hugeapge pagetable pointers contain a (different)
	146	* shift value in the low bits. All tables must be aligned so
	147	* as to leave enough 0 bits in the address to contain it. */
	148	unsigned long minalign = max(MAX_PGTABLE_INDEX_SIZE + 1,
	149	HUGEPD_SHIFT_MASK + 1);
a0668cdc DG	150	struct kmem_cache *new;
	151
	152	/* It would be nice if this was a BUILD_BUG_ON(), but at the
	153	* moment, gcc doesn't seem to recognize is_power_of_2 as a
	154	* constant expression, so so much for that. */
	155	BUG_ON(!is_power_of_2(minalign));
	156	BUG_ON((shift < 1) \|\| (shift > MAX_PGTABLE_INDEX_SIZE));
	157
	158	if (PGT_CACHE(shift))
	159	return; /* Already have a cache of this size */
	160
	161	align = max_t(unsigned long, align, minalign);
	162	name = kasprintf(GFP_KERNEL, "pgtable-2^%d", shift);
	163	new = kmem_cache_create(name, table_size, align, 0, ctor);
	164	PGT_CACHE(shift) = new;
	165
	166	pr_debug("Allocated pgtable cache for order %d\n", shift);
	167	}
	168
14cf11af PM	169
	170	void pgtable_cache_init(void)
	171	{
a0668cdc DG	172	pgtable_cache_add(PGD_INDEX_SIZE, pgd_ctor);
	173	pgtable_cache_add(PMD_INDEX_SIZE, pmd_ctor);
	174	if (!PGT_CACHE(PGD_INDEX_SIZE) \|\| !PGT_CACHE(PMD_INDEX_SIZE))
	175	panic("Couldn't allocate pgtable caches");
	176
	177	/* In all current configs, when the PUD index exists it's the
	178	* same size as either the pgd or pmd index. Verify that the
	179	* initialization above has also created a PUD cache. This
	180	* will need re-examiniation if we add new possibilities for
	181	* the pagetable layout. */
	182	BUG_ON(PUD_INDEX_SIZE && !PGT_CACHE(PUD_INDEX_SIZE));
14cf11af	183	}
d29eff7b AW	184
	185	#ifdef CONFIG_SPARSEMEM_VMEMMAP
	186	/*
	187	* Given an address within the vmemmap, determine the pfn of the page that
	188	* represents the start of the section it is within. Note that we have to
	189	* do this by hand as the proffered address may not be correctly aligned.
	190	* Subtraction of non-aligned pointers produces undefined results.
	191	*/
09de9ff8	192	static unsigned long __meminit vmemmap_section_start(unsigned long page)
d29eff7b AW	193	{
	194	unsigned long offset = page - ((unsigned long)(vmemmap));
	195
	196	/* Return the pfn of the start of the section. */
	197	return (offset / sizeof(struct page)) & PAGE_SECTION_MASK;
	198	}
	199
	200	/*
	201	* Check if this vmemmap page is already initialised. If any section
	202	* which overlaps this vmemmap page is initialised then this page is
	203	* initialised already.
	204	*/
09de9ff8	205	static int __meminit vmemmap_populated(unsigned long start, int page_size)
d29eff7b AW	206	{
	207	unsigned long end = start + page_size;
	208
	209	for (; start < end; start += (PAGES_PER_SECTION * sizeof(struct page)))
	210	if (pfn_valid(vmemmap_section_start(start)))
	211	return 1;
	212
	213	return 0;
	214	}
	215
32a74949 BH	216	/* On hash-based CPUs, the vmemmap is bolted in the hash table.
	217	*
	218	* On Book3E CPUs, the vmemmap is currently mapped in the top half of
	219	* the vmalloc space using normal page tables, though the size of
	220	* pages encoded in the PTEs can be different
	221	*/
	222
	223	#ifdef CONFIG_PPC_BOOK3E
	224	static void __meminit vmemmap_create_mapping(unsigned long start,
	225	unsigned long page_size,
	226	unsigned long phys)
	227	{
	228	/* Create a PTE encoding without page size */
	229	unsigned long i, flags = _PAGE_PRESENT \| _PAGE_ACCESSED \|
	230	_PAGE_KERNEL_RW;
	231
	232	/* PTEs only contain page size encodings up to 32M */
	233	BUG_ON(mmu_psize_defs[mmu_vmemmap_psize].enc > 0xf);
	234
	235	/* Encode the size in the PTE */
	236	flags \|= mmu_psize_defs[mmu_vmemmap_psize].enc << 8;
	237
	238	/* For each PTE for that area, map things. Note that we don't
	239	* increment phys because all PTEs are of the large size and
	240	* thus must have the low bits clear
	241	*/
	242	for (i = 0; i < page_size; i += PAGE_SIZE)
	243	BUG_ON(map_kernel_page(start + i, phys, flags));
	244	}
	245	#else /* CONFIG_PPC_BOOK3E */
	246	static void __meminit vmemmap_create_mapping(unsigned long start,
	247	unsigned long page_size,
	248	unsigned long phys)
	249	{
	250	int mapped = htab_bolt_mapping(start, start + page_size, phys,
	251	PAGE_KERNEL, mmu_vmemmap_psize,
	252	mmu_kernel_ssize);
	253	BUG_ON(mapped < 0);
	254	}
	255	#endif /* CONFIG_PPC_BOOK3E */
	256
91eea67c MN	257	struct vmemmap_backing *vmemmap_list;
	258
	259	static __meminit struct vmemmap_backing * vmemmap_list_alloc(int node)
	260	{
	261	static struct vmemmap_backing *next;
	262	static int num_left;
	263
	264	/* allocate a page when required and hand out chunks */
	265	if (!next \|\| !num_left) {
	266	next = vmemmap_alloc_block(PAGE_SIZE, node);
	267	if (unlikely(!next)) {
	268	WARN_ON(1);
	269	return NULL;
	270	}
	271	num_left = PAGE_SIZE / sizeof(struct vmemmap_backing);
	272	}
	273
	274	num_left--;
	275
	276	return next++;
	277	}
	278
	279	static __meminit void vmemmap_list_populate(unsigned long phys,
	280	unsigned long start,
	281	int node)
	282	{
	283	struct vmemmap_backing *vmem_back;
	284
	285	vmem_back = vmemmap_list_alloc(node);
	286	if (unlikely(!vmem_back)) {
	287	WARN_ON(1);
	288	return;
	289	}
	290
	291	vmem_back->phys = phys;
	292	vmem_back->virt_addr = start;
	293	vmem_back->list = vmemmap_list;
	294
	295	vmemmap_list = vmem_back;
	296	}
	297
d29eff7b	298	int __meminit vmemmap_populate(struct page *start_page,
cec08e7a	299	unsigned long nr_pages, int node)
d29eff7b	300	{
d29eff7b AW	301	unsigned long start = (unsigned long)start_page;
d29eff7b AW	302	unsigned long end = (unsigned long)(start_page + nr_pages);
cec08e7a	303	unsigned long page_size = 1 << mmu_psize_defs[mmu_vmemmap_psize].shift;
d29eff7b	304
d29eff7b AW	305	/* Align to the page size of the linear mapping. */
	306	start = _ALIGN_DOWN(start, page_size);
	307
32a74949 BH	308	pr_debug("vmemmap_populate page %p, %ld pages, node %d\n",
	309	start_page, nr_pages, node);
	310	pr_debug(" -> map %lx..%lx\n", start, end);
	311
d29eff7b	312	for (; start < end; start += page_size) {
d29eff7b AW	313	void *p;
	314
	315	if (vmemmap_populated(start, page_size))
	316	continue;
	317
	318	p = vmemmap_alloc_block(page_size, node);
	319	if (!p)
	320	return -ENOMEM;
	321
91eea67c MN	322	vmemmap_list_populate(__pa(p), start, node);
91eea67c MN	323
32a74949 BH	324	pr_debug(" * %016lx..%016lx allocated at %p\n",
32a74949 BH	325	start, start + page_size, p);
d29eff7b	326
32a74949	327	vmemmap_create_mapping(start, page_size, __pa(p));
d29eff7b AW	328	}
	329
	330	return 0;
	331	}
cec08e7a	332	#endif /* CONFIG_SPARSEMEM_VMEMMAP */