i386: prepare shared mm/discontig.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 431 deletions

diff --git a/arch/i386/mm/discontig.c b/arch/i386/mm/discontig.c
deleted file mode 100644
index 860e912a3fbb4..0000000000000
--- a/arch/i386/mm/discontig.c
+++ /dev/null
@@ -1,431 +0,0 @@
-/*
- * Written by: Patricia Gaughen <gone@us.ibm.com>, IBM Corporation
- * August 2002: added remote node KVA remap - Martin J. Bligh 
- *
- * Copyright (C) 2002, IBM Corp.
- *
- * All rights reserved.          
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT.  See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/mm.h>
-#include <linux/bootmem.h>
-#include <linux/mmzone.h>
-#include <linux/highmem.h>
-#include <linux/initrd.h>
-#include <linux/nodemask.h>
-#include <linux/module.h>
-#include <linux/kexec.h>
-#include <linux/pfn.h>
-#include <linux/swap.h>
-
-#include <asm/e820.h>
-#include <asm/setup.h>
-#include <asm/mmzone.h>
-#include <bios_ebda.h>
-
-struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
-EXPORT_SYMBOL(node_data);
-bootmem_data_t node0_bdata;
-
-/*
- * numa interface - we expect the numa architecture specific code to have
- *                  populated the following initialisation.
- *
- * 1) node_online_map  - the map of all nodes configured (online) in the system
- * 2) node_start_pfn   - the starting page frame number for a node
- * 3) node_end_pfn     - the ending page fram number for a node
- */
-unsigned long node_start_pfn[MAX_NUMNODES] __read_mostly;
-unsigned long node_end_pfn[MAX_NUMNODES] __read_mostly;
-
-
-#ifdef CONFIG_DISCONTIGMEM
-/*
- * 4) physnode_map     - the mapping between a pfn and owning node
- * physnode_map keeps track of the physical memory layout of a generic
- * numa node on a 256Mb break (each element of the array will
- * represent 256Mb of memory and will be marked by the node id.  so,
- * if the first gig is on node 0, and the second gig is on node 1
- * physnode_map will contain:
- *
- *     physnode_map[0-3] = 0;
- *     physnode_map[4-7] = 1;
- *     physnode_map[8- ] = -1;
- */
-s8 physnode_map[MAX_ELEMENTS] __read_mostly = { [0 ... (MAX_ELEMENTS - 1)] = -1};
-EXPORT_SYMBOL(physnode_map);
-
-void memory_present(int nid, unsigned long start, unsigned long end)
-{
-	unsigned long pfn;
-
-	printk(KERN_INFO "Node: %d, start_pfn: %ld, end_pfn: %ld\n",
-			nid, start, end);
-	printk(KERN_DEBUG "  Setting physnode_map array to node %d for pfns:\n", nid);
-	printk(KERN_DEBUG "  ");
-	for (pfn = start; pfn < end; pfn += PAGES_PER_ELEMENT) {
-		physnode_map[pfn / PAGES_PER_ELEMENT] = nid;
-		printk("%ld ", pfn);
-	}
-	printk("\n");
-}
-
-unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,
-					      unsigned long end_pfn)
-{
-	unsigned long nr_pages = end_pfn - start_pfn;
-
-	if (!nr_pages)
-		return 0;
-
-	return (nr_pages + 1) * sizeof(struct page);
-}
-#endif
-
-extern unsigned long find_max_low_pfn(void);
-extern void add_one_highpage_init(struct page *, int, int);
-extern unsigned long highend_pfn, highstart_pfn;
-
-#define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE)
-
-unsigned long node_remap_start_pfn[MAX_NUMNODES];
-unsigned long node_remap_size[MAX_NUMNODES];
-unsigned long node_remap_offset[MAX_NUMNODES];
-void *node_remap_start_vaddr[MAX_NUMNODES];
-void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
-
-void *node_remap_end_vaddr[MAX_NUMNODES];
-void *node_remap_alloc_vaddr[MAX_NUMNODES];
-static unsigned long kva_start_pfn;
-static unsigned long kva_pages;
-/*
- * FLAT - support for basic PC memory model with discontig enabled, essentially
- *        a single node with all available processors in it with a flat
- *        memory map.
- */
-int __init get_memcfg_numa_flat(void)
-{
-	printk("NUMA - single node, flat memory mode\n");
-
-	/* Run the memory configuration and find the top of memory. */
-	find_max_pfn();
-	node_start_pfn[0] = 0;
-	node_end_pfn[0] = max_pfn;
-	memory_present(0, 0, max_pfn);
-
-        /* Indicate there is one node available. */
-	nodes_clear(node_online_map);
-	node_set_online(0);
-	return 1;
-}
-
-/*
- * Find the highest page frame number we have available for the node
- */
-static void __init find_max_pfn_node(int nid)
-{
-	if (node_end_pfn[nid] > max_pfn)
-		node_end_pfn[nid] = max_pfn;
-	/*
-	 * if a user has given mem=XXXX, then we need to make sure 
-	 * that the node _starts_ before that, too, not just ends
-	 */
-	if (node_start_pfn[nid] > max_pfn)
-		node_start_pfn[nid] = max_pfn;
-	BUG_ON(node_start_pfn[nid] > node_end_pfn[nid]);
-}
-
-/* 
- * Allocate memory for the pg_data_t for this node via a crude pre-bootmem
- * method.  For node zero take this from the bottom of memory, for
- * subsequent nodes place them at node_remap_start_vaddr which contains
- * node local data in physically node local memory.  See setup_memory()
- * for details.
- */
-static void __init allocate_pgdat(int nid)
-{
-	if (nid && node_has_online_mem(nid))
-		NODE_DATA(nid) = (pg_data_t *)node_remap_start_vaddr[nid];
-	else {
-		NODE_DATA(nid) = (pg_data_t *)(pfn_to_kaddr(min_low_pfn));
-		min_low_pfn += PFN_UP(sizeof(pg_data_t));
-	}
-}
-
-void *alloc_remap(int nid, unsigned long size)
-{
-	void *allocation = node_remap_alloc_vaddr[nid];
-
-	size = ALIGN(size, L1_CACHE_BYTES);
-
-	if (!allocation || (allocation + size) >= node_remap_end_vaddr[nid])
-		return 0;
-
-	node_remap_alloc_vaddr[nid] += size;
-	memset(allocation, 0, size);
-
-	return allocation;
-}
-
-void __init remap_numa_kva(void)
-{
-	void *vaddr;
-	unsigned long pfn;
-	int node;
-
-	for_each_online_node(node) {
-		for (pfn=0; pfn < node_remap_size[node]; pfn += PTRS_PER_PTE) {
-			vaddr = node_remap_start_vaddr[node]+(pfn<<PAGE_SHIFT);
-			set_pmd_pfn((ulong) vaddr, 
-				node_remap_start_pfn[node] + pfn, 
-				PAGE_KERNEL_LARGE);
-		}
-	}
-}
-
-static unsigned long calculate_numa_remap_pages(void)
-{
-	int nid;
-	unsigned long size, reserve_pages = 0;
-	unsigned long pfn;
-
-	for_each_online_node(nid) {
-		unsigned old_end_pfn = node_end_pfn[nid];
-
-		/*
-		 * The acpi/srat node info can show hot-add memroy zones
-		 * where memory could be added but not currently present.
-		 */
-		if (node_start_pfn[nid] > max_pfn)
-			continue;
-		if (node_end_pfn[nid] > max_pfn)
-			node_end_pfn[nid] = max_pfn;
-
-		/* ensure the remap includes space for the pgdat. */
-		size = node_remap_size[nid] + sizeof(pg_data_t);
-
-		/* convert size to large (pmd size) pages, rounding up */
-		size = (size + LARGE_PAGE_BYTES - 1) / LARGE_PAGE_BYTES;
-		/* now the roundup is correct, convert to PAGE_SIZE pages */
-		size = size * PTRS_PER_PTE;
-
-		/*
-		 * Validate the region we are allocating only contains valid
-		 * pages.
-		 */
-		for (pfn = node_end_pfn[nid] - size;
-		     pfn < node_end_pfn[nid]; pfn++)
-			if (!page_is_ram(pfn))
-				break;
-
-		if (pfn != node_end_pfn[nid])
-			size = 0;
-
-		printk("Reserving %ld pages of KVA for lmem_map of node %d\n",
-				size, nid);
-		node_remap_size[nid] = size;
-		node_remap_offset[nid] = reserve_pages;
-		reserve_pages += size;
-		printk("Shrinking node %d from %ld pages to %ld pages\n",
-			nid, node_end_pfn[nid], node_end_pfn[nid] - size);
-
-		if (node_end_pfn[nid] & (PTRS_PER_PTE-1)) {
-			/*
-			 * Align node_end_pfn[] and node_remap_start_pfn[] to
-			 * pmd boundary. remap_numa_kva will barf otherwise.
-			 */
-			printk("Shrinking node %d further by %ld pages for proper alignment\n",
-				nid, node_end_pfn[nid] & (PTRS_PER_PTE-1));
-			size +=  node_end_pfn[nid] & (PTRS_PER_PTE-1);
-		}
-
-		node_end_pfn[nid] -= size;
-		node_remap_start_pfn[nid] = node_end_pfn[nid];
-		shrink_active_range(nid, old_end_pfn, node_end_pfn[nid]);
-	}
-	printk("Reserving total of %ld pages for numa KVA remap\n",
-			reserve_pages);
-	return reserve_pages;
-}
-
-extern void setup_bootmem_allocator(void);
-unsigned long __init setup_memory(void)
-{
-	int nid;
-	unsigned long system_start_pfn, system_max_low_pfn;
-
-	/*
-	 * When mapping a NUMA machine we allocate the node_mem_map arrays
-	 * from node local memory.  They are then mapped directly into KVA
-	 * between zone normal and vmalloc space.  Calculate the size of
-	 * this space and use it to adjust the boundry between ZONE_NORMAL
-	 * and ZONE_HIGHMEM.
-	 */
-	find_max_pfn();
-	get_memcfg_numa();
-
-	kva_pages = calculate_numa_remap_pages();
-
-	/* partially used pages are not usable - thus round upwards */
-	system_start_pfn = min_low_pfn = PFN_UP(init_pg_tables_end);
-
-	kva_start_pfn = find_max_low_pfn() - kva_pages;
-
-#ifdef CONFIG_BLK_DEV_INITRD
-	/* Numa kva area is below the initrd */
-	if (LOADER_TYPE && INITRD_START)
-		kva_start_pfn = PFN_DOWN(INITRD_START)  - kva_pages;
-#endif
-	kva_start_pfn -= kva_start_pfn & (PTRS_PER_PTE-1);
-
-	system_max_low_pfn = max_low_pfn = find_max_low_pfn();
-	printk("kva_start_pfn ~ %ld find_max_low_pfn() ~ %ld\n",
-		kva_start_pfn, max_low_pfn);
-	printk("max_pfn = %ld\n", max_pfn);
-#ifdef CONFIG_HIGHMEM
-	highstart_pfn = highend_pfn = max_pfn;
-	if (max_pfn > system_max_low_pfn)
-		highstart_pfn = system_max_low_pfn;
-	printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
-	       pages_to_mb(highend_pfn - highstart_pfn));
-	num_physpages = highend_pfn;
-	high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
-#else
-	num_physpages = system_max_low_pfn;
-	high_memory = (void *) __va(system_max_low_pfn * PAGE_SIZE - 1) + 1;
-#endif
-	printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
-			pages_to_mb(system_max_low_pfn));
-	printk("min_low_pfn = %ld, max_low_pfn = %ld, highstart_pfn = %ld\n", 
-			min_low_pfn, max_low_pfn, highstart_pfn);
-
-	printk("Low memory ends at vaddr %08lx\n",
-			(ulong) pfn_to_kaddr(max_low_pfn));
-	for_each_online_node(nid) {
-		node_remap_start_vaddr[nid] = pfn_to_kaddr(
-				kva_start_pfn + node_remap_offset[nid]);
-		/* Init the node remap allocator */
-		node_remap_end_vaddr[nid] = node_remap_start_vaddr[nid] +
-			(node_remap_size[nid] * PAGE_SIZE);
-		node_remap_alloc_vaddr[nid] = node_remap_start_vaddr[nid] +
-			ALIGN(sizeof(pg_data_t), PAGE_SIZE);
-
-		allocate_pgdat(nid);
-		printk ("node %d will remap to vaddr %08lx - %08lx\n", nid,
-			(ulong) node_remap_start_vaddr[nid],
-			(ulong) pfn_to_kaddr(highstart_pfn
-			   + node_remap_offset[nid] + node_remap_size[nid]));
-	}
-	printk("High memory starts at vaddr %08lx\n",
-			(ulong) pfn_to_kaddr(highstart_pfn));
-	for_each_online_node(nid)
-		find_max_pfn_node(nid);
-
-	memset(NODE_DATA(0), 0, sizeof(struct pglist_data));
-	NODE_DATA(0)->bdata = &node0_bdata;
-	setup_bootmem_allocator();
-	return max_low_pfn;
-}
-
-void __init numa_kva_reserve(void)
-{
-	reserve_bootmem(PFN_PHYS(kva_start_pfn),PFN_PHYS(kva_pages));
-}
-
-void __init zone_sizes_init(void)
-{
-	int nid;
-	unsigned long max_zone_pfns[MAX_NR_ZONES];
-	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
-	max_zone_pfns[ZONE_DMA] =
-		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
-	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
-#ifdef CONFIG_HIGHMEM
-	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
-#endif
-
-	/* If SRAT has not registered memory, register it now */
-	if (find_max_pfn_with_active_regions() == 0) {
-		for_each_online_node(nid) {
-			if (node_has_online_mem(nid))
-				add_active_range(nid, node_start_pfn[nid],
-							node_end_pfn[nid]);
-		}
-	}
-
-	free_area_init_nodes(max_zone_pfns);
-	return;
-}
-
-void __init set_highmem_pages_init(int bad_ppro) 
-{
-#ifdef CONFIG_HIGHMEM
-	struct zone *zone;
-	struct page *page;
-
-	for_each_zone(zone) {
-		unsigned long node_pfn, zone_start_pfn, zone_end_pfn;
-
-		if (!is_highmem(zone))
-			continue;
-
-		zone_start_pfn = zone->zone_start_pfn;
-		zone_end_pfn = zone_start_pfn + zone->spanned_pages;
-
-		printk("Initializing %s for node %d (%08lx:%08lx)\n",
-				zone->name, zone_to_nid(zone),
-				zone_start_pfn, zone_end_pfn);
-
-		for (node_pfn = zone_start_pfn; node_pfn < zone_end_pfn; node_pfn++) {
-			if (!pfn_valid(node_pfn))
-				continue;
-			page = pfn_to_page(node_pfn);
-			add_one_highpage_init(page, node_pfn, bad_ppro);
-		}
-	}
-	totalram_pages += totalhigh_pages;
-#endif
-}
-
-#ifdef CONFIG_MEMORY_HOTPLUG
-int paddr_to_nid(u64 addr)
-{
-	int nid;
-	unsigned long pfn = PFN_DOWN(addr);
-
-	for_each_node(nid)
-		if (node_start_pfn[nid] <= pfn &&
-		    pfn < node_end_pfn[nid])
-			return nid;
-
-	return -1;
-}
-
-/*
- * This function is used to ask node id BEFORE memmap and mem_section's
- * initialization (pfn_to_nid() can't be used yet).
- * If _PXM is not defined on ACPI's DSDT, node id must be found by this.
- */
-int memory_add_physaddr_to_nid(u64 addr)
-{
-	int nid = paddr_to_nid(addr);
-	return (nid >= 0) ? nid : 0;
-}
-
-EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
-#endif