[deliverable/linux.git] / arch / alpha / mm / numa.c

/*
 *  linux/arch/alpha/mm/numa.c
 *
 *  DISCONTIGMEM NUMA alpha support.
 *
 *  Copyright (C) 2001 Andrea Arcangeli <andrea@suse.de> SuSE
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/swap.h>
#include <linux/initrd.h>
#include <linux/pfn.h>
#include <linux/module.h>

#include <asm/hwrpb.h>
#include <asm/pgalloc.h>
#include <asm/sections.h>

pg_data_t node_data[MAX_NUMNODES];
EXPORT_SYMBOL(node_data);

#undef DEBUG_DISCONTIG
#ifdef DEBUG_DISCONTIG
#define DBGDCONT(args...) printk(args)
#else
#define DBGDCONT(args...)
#endif

#define for_each_mem_cluster(memdesc, _cluster, i)		\
	for ((_cluster) = (memdesc)->cluster, (i) = 0;		\
	     (i) < (memdesc)->numclusters; (i)++, (_cluster)++)

static void __init show_mem_layout(void)
{
	struct memclust_struct * cluster;
	struct memdesc_struct * memdesc;
	int i;

	/* Find free clusters, and init and free the bootmem accordingly.  */
	memdesc = (struct memdesc_struct *)
	  (hwrpb->mddt_offset + (unsigned long) hwrpb);

	printk("Raw memory layout:\n");
	for_each_mem_cluster(memdesc, cluster, i) {
		printk(" memcluster %2d, usage %1lx, start %8lu, end %8lu\n",
		       i, cluster->usage, cluster->start_pfn,
		       cluster->start_pfn + cluster->numpages);
	}
}

static void __init
setup_memory_node(int nid, void *kernel_end)
{
	extern unsigned long mem_size_limit;
	struct memclust_struct * cluster;
	struct memdesc_struct * memdesc;
	unsigned long start_kernel_pfn, end_kernel_pfn;
	unsigned long bootmap_size, bootmap_pages, bootmap_start;
	unsigned long start, end;
	unsigned long node_pfn_start, node_pfn_end;
	unsigned long node_min_pfn, node_max_pfn;
	int i;
	unsigned long node_datasz = PFN_UP(sizeof(pg_data_t));
	int show_init = 0;

	/* Find the bounds of current node */
	node_pfn_start = (node_mem_start(nid)) >> PAGE_SHIFT;
	node_pfn_end = node_pfn_start + (node_mem_size(nid) >> PAGE_SHIFT);
	
	/* Find free clusters, and init and free the bootmem accordingly.  */
	memdesc = (struct memdesc_struct *)
	  (hwrpb->mddt_offset + (unsigned long) hwrpb);

	/* find the bounds of this node (node_min_pfn/node_max_pfn) */
	node_min_pfn = ~0UL;
	node_max_pfn = 0UL;
	for_each_mem_cluster(memdesc, cluster, i) {
		/* Bit 0 is console/PALcode reserved.  Bit 1 is
		   non-volatile memory -- we might want to mark
		   this for later.  */
		if (cluster->usage & 3)
			continue;

		start = cluster->start_pfn;
		end = start + cluster->numpages;

		if (start >= node_pfn_end || end <= node_pfn_start)
			continue;

		if (!show_init) {
			show_init = 1;
			printk("Initializing bootmem allocator on Node ID %d\n", nid);
		}
		printk(" memcluster %2d, usage %1lx, start %8lu, end %8lu\n",
		       i, cluster->usage, cluster->start_pfn,
		       cluster->start_pfn + cluster->numpages);

		if (start < node_pfn_start)
			start = node_pfn_start;
		if (end > node_pfn_end)
			end = node_pfn_end;

		if (start < node_min_pfn)
			node_min_pfn = start;
		if (end > node_max_pfn)
			node_max_pfn = end;
	}

	if (mem_size_limit && node_max_pfn > mem_size_limit) {
		static int msg_shown = 0;
		if (!msg_shown) {
			msg_shown = 1;
			printk("setup: forcing memory size to %ldK (from %ldK).\n",
			       mem_size_limit << (PAGE_SHIFT - 10),
			       node_max_pfn    << (PAGE_SHIFT - 10));
		}
		node_max_pfn = mem_size_limit;
	}

	if (node_min_pfn >= node_max_pfn)
		return;

	/* Update global {min,max}_low_pfn from node information. */
	if (node_min_pfn < min_low_pfn)
		min_low_pfn = node_min_pfn;
	if (node_max_pfn > max_low_pfn)
		max_pfn = max_low_pfn = node_max_pfn;

#if 0 /* we'll try this one again in a little while */
	/* Cute trick to make sure our local node data is on local memory */
	node_data[nid] = (pg_data_t *)(__va(node_min_pfn << PAGE_SHIFT));
#endif
	/* Quasi-mark the pg_data_t as in-use */
	node_min_pfn += node_datasz;
	if (node_min_pfn >= node_max_pfn) {
		printk(" not enough mem to reserve NODE_DATA");
		return;
	}
	NODE_DATA(nid)->bdata = &bootmem_node_data[nid];

	printk(" Detected node memory:   start %8lu, end %8lu\n",
	       node_min_pfn, node_max_pfn);

	DBGDCONT(" DISCONTIG: node_data[%d]   is at 0x%p\n", nid, NODE_DATA(nid));
	DBGDCONT(" DISCONTIG: NODE_DATA(%d)->bdata is at 0x%p\n", nid, NODE_DATA(nid)->bdata);

	/* Find the bounds of kernel memory.  */
	start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
	end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
	bootmap_start = -1;

	if (!nid && (node_max_pfn < end_kernel_pfn || node_min_pfn > start_kernel_pfn))
		panic("kernel loaded out of ram");

	/* Zone start phys-addr must be 2^(MAX_ORDER-1) aligned.
	   Note that we round this down, not up - node memory
	   has much larger alignment than 8Mb, so it's safe. */
	node_min_pfn &= ~((1UL << (MAX_ORDER-1))-1);

	/* We need to know how many physically contiguous pages
	   we'll need for the bootmap.  */
	bootmap_pages = bootmem_bootmap_pages(node_max_pfn-node_min_pfn);

	/* Now find a good region where to allocate the bootmap.  */
	for_each_mem_cluster(memdesc, cluster, i) {
		if (cluster->usage & 3)
			continue;

		start = cluster->start_pfn;
		end = start + cluster->numpages;

		if (start >= node_max_pfn || end <= node_min_pfn)
			continue;

		if (end > node_max_pfn)
			end = node_max_pfn;
		if (start < node_min_pfn)
			start = node_min_pfn;

		if (start < start_kernel_pfn) {
			if (end > end_kernel_pfn
			    && end - end_kernel_pfn >= bootmap_pages) {
				bootmap_start = end_kernel_pfn;
				break;
			} else if (end > start_kernel_pfn)
				end = start_kernel_pfn;
		} else if (start < end_kernel_pfn)
			start = end_kernel_pfn;
		if (end - start >= bootmap_pages) {
			bootmap_start = start;
			break;
		}
	}

	if (bootmap_start == -1)
		panic("couldn't find a contiguous place for the bootmap");

	/* Allocate the bootmap and mark the whole MM as reserved.  */
	bootmap_size = init_bootmem_node(NODE_DATA(nid), bootmap_start,
					 node_min_pfn, node_max_pfn);
	DBGDCONT(" bootmap_start %lu, bootmap_size %lu, bootmap_pages %lu\n",
		 bootmap_start, bootmap_size, bootmap_pages);

	/* Mark the free regions.  */
	for_each_mem_cluster(memdesc, cluster, i) {
		if (cluster->usage & 3)
			continue;

		start = cluster->start_pfn;
		end = cluster->start_pfn + cluster->numpages;

		if (start >= node_max_pfn || end <= node_min_pfn)
			continue;

		if (end > node_max_pfn)
			end = node_max_pfn;
		if (start < node_min_pfn)
			start = node_min_pfn;

		if (start < start_kernel_pfn) {
			if (end > end_kernel_pfn) {
				free_bootmem_node(NODE_DATA(nid), PFN_PHYS(start),
					     (PFN_PHYS(start_kernel_pfn)
					      - PFN_PHYS(start)));
				printk(" freeing pages %ld:%ld\n",
				       start, start_kernel_pfn);
				start = end_kernel_pfn;
			} else if (end > start_kernel_pfn)
				end = start_kernel_pfn;
		} else if (start < end_kernel_pfn)
			start = end_kernel_pfn;
		if (start >= end)
			continue;

		free_bootmem_node(NODE_DATA(nid), PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
		printk(" freeing pages %ld:%ld\n", start, end);
	}

	/* Reserve the bootmap memory.  */
	reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(bootmap_start),
			bootmap_size, BOOTMEM_DEFAULT);
	printk(" reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));

	node_set_online(nid);
}

void __init
setup_memory(void *kernel_end)
{
	int nid;

	show_mem_layout();

	nodes_clear(node_online_map);

	min_low_pfn = ~0UL;
	max_low_pfn = 0UL;
	for (nid = 0; nid < MAX_NUMNODES; nid++)
		setup_memory_node(nid, kernel_end);

#ifdef CONFIG_BLK_DEV_INITRD
	initrd_start = INITRD_START;
	if (initrd_start) {
		extern void *move_initrd(unsigned long);

		initrd_end = initrd_start+INITRD_SIZE;
		printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
		       (void *) initrd_start, INITRD_SIZE);

		if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
			if (!move_initrd(PFN_PHYS(max_low_pfn)))
				printk("initrd extends beyond end of memory "
				       "(0x%08lx > 0x%p)\ndisabling initrd\n",
				       initrd_end,
				       phys_to_virt(PFN_PHYS(max_low_pfn)));
		} else {
			nid = kvaddr_to_nid(initrd_start);
			reserve_bootmem_node(NODE_DATA(nid),
					     virt_to_phys((void *)initrd_start),
					     INITRD_SIZE, BOOTMEM_DEFAULT);
		}
	}
#endif /* CONFIG_BLK_DEV_INITRD */
}

void __init paging_init(void)
{
	unsigned int    nid;
	unsigned long   zones_size[MAX_NR_ZONES] = {0, };
	unsigned long	dma_local_pfn;

	/*
	 * The old global MAX_DMA_ADDRESS per-arch API doesn't fit
	 * in the NUMA model, for now we convert it to a pfn and
	 * we interpret this pfn as a local per-node information.
	 * This issue isn't very important since none of these machines
	 * have legacy ISA slots anyways.
	 */
	dma_local_pfn = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;

	for_each_online_node(nid) {
		bootmem_data_t *bdata = &bootmem_node_data[nid];
		unsigned long start_pfn = bdata->node_min_pfn;
		unsigned long end_pfn = bdata->node_low_pfn;

		if (dma_local_pfn >= end_pfn - start_pfn)
			zones_size[ZONE_DMA] = end_pfn - start_pfn;
		else {
			zones_size[ZONE_DMA] = dma_local_pfn;
			zones_size[ZONE_NORMAL] = (end_pfn - start_pfn) - dma_local_pfn;
		}
		node_set_state(nid, N_NORMAL_MEMORY);
		free_area_init_node(nid, zones_size, start_pfn, NULL);
	}

	/* Initialize the kernel's ZERO_PGE. */
	memset((void *)ZERO_PGE, 0, PAGE_SIZE);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/alpha/mm/numa.c
	3	*
	4	* DISCONTIGMEM NUMA alpha support.
	5	*
	6	* Copyright (C) 2001 Andrea Arcangeli <andrea@suse.de> SuSE
	7	*/
	8
1da177e4 LT	9	#include <linux/types.h>
	10	#include <linux/kernel.h>
	11	#include <linux/mm.h>
	12	#include <linux/bootmem.h>
	13	#include <linux/swap.h>
	14	#include <linux/initrd.h>
22a9835c	15	#include <linux/pfn.h>
cff52daf	16	#include <linux/module.h>
1da177e4 LT	17
	18	#include <asm/hwrpb.h>
	19	#include <asm/pgalloc.h>
f3beeb4a	20	#include <asm/sections.h>
1da177e4 LT	21
1da177e4 LT	22	pg_data_t node_data[MAX_NUMNODES];
cff52daf	23	EXPORT_SYMBOL(node_data);
1da177e4 LT	24
	25	#undef DEBUG_DISCONTIG
	26	#ifdef DEBUG_DISCONTIG
	27	#define DBGDCONT(args...) printk(args)
	28	#else
	29	#define DBGDCONT(args...)
	30	#endif
	31
fb26b3e6 RK	32	#define for_each_mem_cluster(memdesc, _cluster, i) \
	33	for ((_cluster) = (memdesc)->cluster, (i) = 0; \
	34	(i) < (memdesc)->numclusters; (i)++, (_cluster)++)
1da177e4 LT	35
	36	static void __init show_mem_layout(void)
	37	{
	38	struct memclust_struct * cluster;
	39	struct memdesc_struct * memdesc;
	40	int i;
	41
	42	/* Find free clusters, and init and free the bootmem accordingly. */
	43	memdesc = (struct memdesc_struct *)
	44	(hwrpb->mddt_offset + (unsigned long) hwrpb);
	45
	46	printk("Raw memory layout:\n");
	47	for_each_mem_cluster(memdesc, cluster, i) {
	48	printk(" memcluster %2d, usage %1lx, start %8lu, end %8lu\n",
	49	i, cluster->usage, cluster->start_pfn,
	50	cluster->start_pfn + cluster->numpages);
	51	}
	52	}
	53
	54	static void __init
	55	setup_memory_node(int nid, void *kernel_end)
	56	{
	57	extern unsigned long mem_size_limit;
	58	struct memclust_struct * cluster;
	59	struct memdesc_struct * memdesc;
	60	unsigned long start_kernel_pfn, end_kernel_pfn;
	61	unsigned long bootmap_size, bootmap_pages, bootmap_start;
	62	unsigned long start, end;
	63	unsigned long node_pfn_start, node_pfn_end;
	64	unsigned long node_min_pfn, node_max_pfn;
	65	int i;
	66	unsigned long node_datasz = PFN_UP(sizeof(pg_data_t));
	67	int show_init = 0;
	68
	69	/* Find the bounds of current node */
	70	node_pfn_start = (node_mem_start(nid)) >> PAGE_SHIFT;
	71	node_pfn_end = node_pfn_start + (node_mem_size(nid) >> PAGE_SHIFT);
	72
	73	/* Find free clusters, and init and free the bootmem accordingly. */
	74	memdesc = (struct memdesc_struct *)
	75	(hwrpb->mddt_offset + (unsigned long) hwrpb);
	76
	77	/* find the bounds of this node (node_min_pfn/node_max_pfn) */
	78	node_min_pfn = ~0UL;
	79	node_max_pfn = 0UL;
	80	for_each_mem_cluster(memdesc, cluster, i) {
	81	/* Bit 0 is console/PALcode reserved. Bit 1 is
	82	non-volatile memory -- we might want to mark
	83	this for later. */
	84	if (cluster->usage & 3)
	85	continue;
	86
	87	start = cluster->start_pfn;
	88	end = start + cluster->numpages;
	89
	90	if (start >= node_pfn_end \|\| end <= node_pfn_start)
	91	continue;
	92
	93	if (!show_init) {
	94	show_init = 1;
	95	printk("Initializing bootmem allocator on Node ID %d\n", nid);
	96	}
	97	printk(" memcluster %2d, usage %1lx, start %8lu, end %8lu\n",
	98	i, cluster->usage, cluster->start_pfn,
99	cluster->start_pfn + cluster->numpages);
100
101	if (start < node_pfn_start)
102	start = node_pfn_start;
103	if (end > node_pfn_end)
104	end = node_pfn_end;
105
106	if (start < node_min_pfn)
107	node_min_pfn = start;
108	if (end > node_max_pfn)
109	node_max_pfn = end;
110	}
111
112	if (mem_size_limit && node_max_pfn > mem_size_limit) {
113	static int msg_shown = 0;
114	if (!msg_shown) {
115	msg_shown = 1;
116	printk("setup: forcing memory size to %ldK (from %ldK).\n",
117	mem_size_limit << (PAGE_SHIFT - 10),
118	node_max_pfn << (PAGE_SHIFT - 10));
119	}
120	node_max_pfn = mem_size_limit;
121	}
122
123	if (node_min_pfn >= node_max_pfn)
124	return;
125
126	/* Update global {min,max}_low_pfn from node information. */
127	if (node_min_pfn < min_low_pfn)
128	min_low_pfn = node_min_pfn;
129	if (node_max_pfn > max_low_pfn)
130	max_pfn = max_low_pfn = node_max_pfn;
131
1da177e4 LT	132	#if 0 /* we'll try this one again in a little while */
	133	/* Cute trick to make sure our local node data is on local memory */
	134	node_data[nid] = (pg_data_t *)(__va(node_min_pfn << PAGE_SHIFT));
	135	#endif
	136	/* Quasi-mark the pg_data_t as in-use */
	137	node_min_pfn += node_datasz;
	138	if (node_min_pfn >= node_max_pfn) {
	139	printk(" not enough mem to reserve NODE_DATA");
	140	return;
	141	}
b61bfa3c	142	NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
1da177e4 LT	143
	144	printk(" Detected node memory: start %8lu, end %8lu\n",
	145	node_min_pfn, node_max_pfn);
	146
	147	DBGDCONT(" DISCONTIG: node_data[%d] is at 0x%p\n", nid, NODE_DATA(nid));
	148	DBGDCONT(" DISCONTIG: NODE_DATA(%d)->bdata is at 0x%p\n", nid, NODE_DATA(nid)->bdata);
	149
	150	/* Find the bounds of kernel memory. */
	151	start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
	152	end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
	153	bootmap_start = -1;
	154
	155	if (!nid && (node_max_pfn < end_kernel_pfn \|\| node_min_pfn > start_kernel_pfn))
	156	panic("kernel loaded out of ram");
	157
	158	/* Zone start phys-addr must be 2^(MAX_ORDER-1) aligned.
	159	Note that we round this down, not up - node memory
	160	has much larger alignment than 8Mb, so it's safe. */
	161	node_min_pfn &= ~((1UL << (MAX_ORDER-1))-1);
	162
	163	/* We need to know how many physically contiguous pages
	164	we'll need for the bootmap. */
	165	bootmap_pages = bootmem_bootmap_pages(node_max_pfn-node_min_pfn);
	166
	167	/* Now find a good region where to allocate the bootmap. */
	168	for_each_mem_cluster(memdesc, cluster, i) {
	169	if (cluster->usage & 3)
	170	continue;
	171
	172	start = cluster->start_pfn;
	173	end = start + cluster->numpages;
	174
	175	if (start >= node_max_pfn \|\| end <= node_min_pfn)
	176	continue;
	177
	178	if (end > node_max_pfn)
	179	end = node_max_pfn;
	180	if (start < node_min_pfn)
	181	start = node_min_pfn;
	182
	183	if (start < start_kernel_pfn) {
	184	if (end > end_kernel_pfn
	185	&& end - end_kernel_pfn >= bootmap_pages) {
	186	bootmap_start = end_kernel_pfn;
	187	break;
	188	} else if (end > start_kernel_pfn)
	189	end = start_kernel_pfn;
	190	} else if (start < end_kernel_pfn)
	191	start = end_kernel_pfn;
	192	if (end - start >= bootmap_pages) {
	193	bootmap_start = start;
	194	break;
	195	}
	196	}
	197
	198	if (bootmap_start == -1)
af901ca1	199	panic("couldn't find a contiguous place for the bootmap");
1da177e4 LT	200
	201	/* Allocate the bootmap and mark the whole MM as reserved. */
	202	bootmap_size = init_bootmem_node(NODE_DATA(nid), bootmap_start,
	203	node_min_pfn, node_max_pfn);
	204	DBGDCONT(" bootmap_start %lu, bootmap_size %lu, bootmap_pages %lu\n",
	205	bootmap_start, bootmap_size, bootmap_pages);
	206
	207	/* Mark the free regions. */
	208	for_each_mem_cluster(memdesc, cluster, i) {
	209	if (cluster->usage & 3)
	210	continue;
	211
	212	start = cluster->start_pfn;
	213	end = cluster->start_pfn + cluster->numpages;
	214
	215	if (start >= node_max_pfn \|\| end <= node_min_pfn)
	216	continue;
	217
	218	if (end > node_max_pfn)
	219	end = node_max_pfn;
	220	if (start < node_min_pfn)
	221	start = node_min_pfn;
	222
	223	if (start < start_kernel_pfn) {
	224	if (end > end_kernel_pfn) {
	225	free_bootmem_node(NODE_DATA(nid), PFN_PHYS(start),
	226	(PFN_PHYS(start_kernel_pfn)
	227	- PFN_PHYS(start)));
	228	printk(" freeing pages %ld:%ld\n",
	229	start, start_kernel_pfn);
	230	start = end_kernel_pfn;
	231	} else if (end > start_kernel_pfn)
	232	end = start_kernel_pfn;
	233	} else if (start < end_kernel_pfn)
	234	start = end_kernel_pfn;
	235	if (start >= end)
	236	continue;
	237
	238	free_bootmem_node(NODE_DATA(nid), PFN_PHYS(start), PFN_PHYS(end) - PFN_PHYS(start));
	239	printk(" freeing pages %ld:%ld\n", start, end);
	240	}
	241
	242	/* Reserve the bootmap memory. */
72a7fe39 BW	243	reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(bootmap_start),
72a7fe39 BW	244	bootmap_size, BOOTMEM_DEFAULT);
1da177e4 LT	245	printk(" reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
	246
	247	node_set_online(nid);
	248	}
	249
	250	void __init
	251	setup_memory(void *kernel_end)
	252	{
	253	int nid;
	254
	255	show_mem_layout();
	256
	257	nodes_clear(node_online_map);
	258
	259	min_low_pfn = ~0UL;
	260	max_low_pfn = 0UL;
	261	for (nid = 0; nid < MAX_NUMNODES; nid++)
	262	setup_memory_node(nid, kernel_end);
	263
	264	#ifdef CONFIG_BLK_DEV_INITRD
	265	initrd_start = INITRD_START;
	266	if (initrd_start) {
	267	extern void *move_initrd(unsigned long);
	268
	269	initrd_end = initrd_start+INITRD_SIZE;
	270	printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
	271	(void *) initrd_start, INITRD_SIZE);
	272
	273	if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
	274	if (!move_initrd(PFN_PHYS(max_low_pfn)))
	275	printk("initrd extends beyond end of memory "
	276	"(0x%08lx > 0x%p)\ndisabling initrd\n",
	277	initrd_end,
	278	phys_to_virt(PFN_PHYS(max_low_pfn)));
	279	} else {
	280	nid = kvaddr_to_nid(initrd_start);
	281	reserve_bootmem_node(NODE_DATA(nid),
	282	virt_to_phys((void *)initrd_start),
72a7fe39	283	INITRD_SIZE, BOOTMEM_DEFAULT);
1da177e4 LT	284	}
	285	}
	286	#endif /* CONFIG_BLK_DEV_INITRD */
	287	}
	288
	289	void __init paging_init(void)
	290	{
	291	unsigned int nid;
	292	unsigned long zones_size[MAX_NR_ZONES] = {0, };
	293	unsigned long dma_local_pfn;
	294
	295	/*
	296	* The old global MAX_DMA_ADDRESS per-arch API doesn't fit
	297	* in the NUMA model, for now we convert it to a pfn and
	298	* we interpret this pfn as a local per-node information.
	299	* This issue isn't very important since none of these machines
	300	* have legacy ISA slots anyways.
	301	*/
	302	dma_local_pfn = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
	303
	304	for_each_online_node(nid) {
b61bfa3c	305	bootmem_data_t *bdata = &bootmem_node_data[nid];
3560e249	306	unsigned long start_pfn = bdata->node_min_pfn;
b61bfa3c	307	unsigned long end_pfn = bdata->node_low_pfn;
1da177e4 LT	308
	309	if (dma_local_pfn >= end_pfn - start_pfn)
	310	zones_size[ZONE_DMA] = end_pfn - start_pfn;
	311	else {
	312	zones_size[ZONE_DMA] = dma_local_pfn;
	313	zones_size[ZONE_NORMAL] = (end_pfn - start_pfn) - dma_local_pfn;
	314	}
ad8b4b28	315	node_set_state(nid, N_NORMAL_MEMORY);
9109fb7b	316	free_area_init_node(nid, zones_size, start_pfn, NULL);
1da177e4 LT	317	}
	318
	319	/* Initialize the kernel's ZERO_PGE. */
	320	memset((void *)ZERO_PGE, 0, PAGE_SIZE);
	321	}