arch/alpha/mm/numa.c - maze/linux - Git at Google

 /*
  *  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;

 	num_physpages += node_max_pfn - node_min_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);
 }

 void __init mem_init(void)
 {
 	unsigned long codesize, reservedpages, datasize, initsize, pfn;
 	extern int page_is_ram(unsigned long) __init;
 	unsigned long nid, i;
 	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);

 	reservedpages = 0;
 	for_each_online_node(nid) {
 		/*
 		 * This will free up the bootmem, ie, slot 0 memory
 		 */
 		totalram_pages += free_all_bootmem_node(NODE_DATA(nid));

 		pfn = NODE_DATA(nid)->node_start_pfn;
 		for (i = 0; i < node_spanned_pages(nid); i++, pfn++)
 			if (page_is_ram(pfn) &&
 			    PageReserved(nid_page_nr(nid, i)))
 				reservedpages++;
 	}

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

 	printk("Memory: %luk/%luk available (%luk kernel code, %luk reserved, "
 	       "%luk data, %luk init)\n",
 	       nr_free_pages() << (PAGE_SHIFT-10),
 	       num_physpages << (PAGE_SHIFT-10),
 	       codesize >> 10,
 	       reservedpages << (PAGE_SHIFT-10),
 	       datasize >> 10,
 	       initsize >> 10);
 #if 0
 	mem_stress();
 #endif
 }
	/*
	* 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;

	num_physpages += node_max_pfn - node_min_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);
	}

	void __init mem_init(void)
	{
	unsigned long codesize, reservedpages, datasize, initsize, pfn;
	extern int page_is_ram(unsigned long) __init;
	unsigned long nid, i;
	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);

	reservedpages = 0;
	for_each_online_node(nid) {
	/*
	* This will free up the bootmem, ie, slot 0 memory
	*/
	totalram_pages += free_all_bootmem_node(NODE_DATA(nid));

	pfn = NODE_DATA(nid)->node_start_pfn;
	for (i = 0; i < node_spanned_pages(nid); i++, pfn++)
	if (page_is_ram(pfn) &&
	PageReserved(nid_page_nr(nid, i)))
	reservedpages++;
	}

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

	printk("Memory: %luk/%luk available (%luk kernel code, %luk reserved, "
	"%luk data, %luk init)\n",
	nr_free_pages() << (PAGE_SHIFT-10),
	num_physpages << (PAGE_SHIFT-10),
	codesize >> 10,
	reservedpages << (PAGE_SHIFT-10),
	datasize >> 10,
	initsize >> 10);
	#if 0
	mem_stress();
	#endif
	}