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Diffstat (limited to 'arch/x86/mm/discontig_32.c')
| -rw-r--r-- | arch/x86/mm/discontig_32.c | 444 |
1 files changed, 0 insertions, 444 deletions
diff --git a/arch/x86/mm/discontig_32.c b/arch/x86/mm/discontig_32.c deleted file mode 100644 index 62fa440678d8..000000000000 --- a/arch/x86/mm/discontig_32.c +++ /dev/null @@ -1,444 +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 <linux/acpi.h> - -#include <asm/e820.h> -#include <asm/setup.h> -#include <asm/mmzone.h> -#include <asm/bios_ebda.h> -#include <asm/proto.h> - -struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; -EXPORT_SYMBOL(node_data); - -/* - * 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 64Mb break (each element of the array will - * represent 64Mb 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[0-15] = 0; - * physnode_map[16-31] = 1; - * physnode_map[32- ] = -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: %lx, end_pfn: %lx\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(KERN_CONT "%lx ", pfn); - } - printk(KERN_CONT "\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 unsigned long highend_pfn, highstart_pfn; - -#define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE) - -unsigned long node_remap_size[MAX_NUMNODES]; -static void *node_remap_start_vaddr[MAX_NUMNODES]; -void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags); - -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(KERN_DEBUG "NUMA - single node, flat memory mode\n"); - - node_start_pfn[0] = 0; - node_end_pfn[0] = max_pfn; - e820_register_active_regions(0, 0, max_pfn); - memory_present(0, 0, max_pfn); - node_remap_size[0] = node_memmap_size_bytes(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 propagate_e820_map_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) -{ - char buf[16]; - - if (node_has_online_mem(nid) && node_remap_start_vaddr[nid]) - NODE_DATA(nid) = (pg_data_t *)node_remap_start_vaddr[nid]; - else { - unsigned long pgdat_phys; - pgdat_phys = find_e820_area(min_low_pfn<<PAGE_SHIFT, - max_pfn_mapped<<PAGE_SHIFT, - sizeof(pg_data_t), - PAGE_SIZE); - NODE_DATA(nid) = (pg_data_t *)(pfn_to_kaddr(pgdat_phys>>PAGE_SHIFT)); - memset(buf, 0, sizeof(buf)); - sprintf(buf, "NODE_DATA %d", nid); - reserve_early(pgdat_phys, pgdat_phys + sizeof(pg_data_t), buf); - } - printk(KERN_DEBUG "allocate_pgdat: node %d NODE_DATA %08lx\n", - nid, (unsigned long)NODE_DATA(nid)); -} - -/* - * In the DISCONTIGMEM and SPARSEMEM memory model, a portion of the kernel - * virtual address space (KVA) is reserved and portions of nodes are mapped - * using it. This is to allow node-local memory to be allocated for - * structures that would normally require ZONE_NORMAL. The memory is - * allocated with alloc_remap() and callers should be prepared to allocate - * from the bootmem allocator instead. - */ -static unsigned long node_remap_start_pfn[MAX_NUMNODES]; -static void *node_remap_end_vaddr[MAX_NUMNODES]; -static void *node_remap_alloc_vaddr[MAX_NUMNODES]; -static unsigned long node_remap_offset[MAX_NUMNODES]; - -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; -} - -static void __init remap_numa_kva(void) -{ - void *vaddr; - unsigned long pfn; - int node; - - for_each_online_node(node) { - printk(KERN_DEBUG "remap_numa_kva: node %d\n", node); - for (pfn=0; pfn < node_remap_size[node]; pfn += PTRS_PER_PTE) { - vaddr = node_remap_start_vaddr[node]+(pfn<<PAGE_SHIFT); - printk(KERN_DEBUG "remap_numa_kva: %08lx to pfn %08lx\n", - (unsigned long)vaddr, - node_remap_start_pfn[node] + pfn); - 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; - - for_each_online_node(nid) { - u64 node_kva_target; - u64 node_kva_final; - - /* - * The acpi/srat node info can show hot-add memroy zones - * where memory could be added but not currently present. - */ - printk(KERN_DEBUG "node %d pfn: [%lx - %lx]\n", - nid, node_start_pfn[nid], node_end_pfn[nid]); - if (node_start_pfn[nid] > max_pfn) - continue; - if (!node_end_pfn[nid]) - 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; - - node_kva_target = round_down(node_end_pfn[nid] - size, - PTRS_PER_PTE); - node_kva_target <<= PAGE_SHIFT; - do { - node_kva_final = find_e820_area(node_kva_target, - ((u64)node_end_pfn[nid])<<PAGE_SHIFT, - ((u64)size)<<PAGE_SHIFT, - LARGE_PAGE_BYTES); - node_kva_target -= LARGE_PAGE_BYTES; - } while (node_kva_final == -1ULL && - (node_kva_target>>PAGE_SHIFT) > (node_start_pfn[nid])); - - if (node_kva_final == -1ULL) - panic("Can not get kva ram\n"); - - node_remap_size[nid] = size; - node_remap_offset[nid] = reserve_pages; - reserve_pages += size; - printk(KERN_DEBUG "Reserving %ld pages of KVA for lmem_map of" - " node %d at %llx\n", - size, nid, node_kva_final>>PAGE_SHIFT); - - /* - * prevent kva address below max_low_pfn want it on system - * with less memory later. - * layout will be: KVA address , KVA RAM - * - * we are supposed to only record the one less then max_low_pfn - * but we could have some hole in high memory, and it will only - * check page_is_ram(pfn) && !page_is_reserved_early(pfn) to decide - * to use it as free. - * So reserve_early here, hope we don't run out of that array - */ - reserve_early(node_kva_final, - node_kva_final+(((u64)size)<<PAGE_SHIFT), - "KVA RAM"); - - node_remap_start_pfn[nid] = node_kva_final>>PAGE_SHIFT; - remove_active_range(nid, node_remap_start_pfn[nid], - node_remap_start_pfn[nid] + size); - } - printk(KERN_INFO "Reserving total of %lx pages for numa KVA remap\n", - reserve_pages); - return reserve_pages; -} - -static void init_remap_allocator(int nid) -{ - node_remap_start_vaddr[nid] = pfn_to_kaddr( - kva_start_pfn + node_remap_offset[nid]); - 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); - - printk(KERN_DEBUG "node %d will remap to vaddr %08lx - %08lx\n", nid, - (ulong) node_remap_start_vaddr[nid], - (ulong) node_remap_end_vaddr[nid]); -} - -void __init initmem_init(unsigned long start_pfn, - unsigned long end_pfn) -{ - int nid; - long kva_target_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 boundary between ZONE_NORMAL - * and ZONE_HIGHMEM. - */ - - get_memcfg_numa(); - - kva_pages = round_up(calculate_numa_remap_pages(), PTRS_PER_PTE); - - kva_target_pfn = round_down(max_low_pfn - kva_pages, PTRS_PER_PTE); - do { - kva_start_pfn = find_e820_area(kva_target_pfn<<PAGE_SHIFT, - max_low_pfn<<PAGE_SHIFT, - kva_pages<<PAGE_SHIFT, - PTRS_PER_PTE<<PAGE_SHIFT) >> PAGE_SHIFT; - kva_target_pfn -= PTRS_PER_PTE; - } while (kva_start_pfn == -1UL && kva_target_pfn > min_low_pfn); - - if (kva_start_pfn == -1UL) - panic("Can not get kva space\n"); - - printk(KERN_INFO "kva_start_pfn ~ %lx max_low_pfn ~ %lx\n", - kva_start_pfn, max_low_pfn); - printk(KERN_INFO "max_pfn = %lx\n", max_pfn); - - /* avoid clash with initrd */ - reserve_early(kva_start_pfn<<PAGE_SHIFT, - (kva_start_pfn + kva_pages)<<PAGE_SHIFT, - "KVA PG"); -#ifdef CONFIG_HIGHMEM - highstart_pfn = highend_pfn = max_pfn; - if (max_pfn > max_low_pfn) - highstart_pfn = 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 = max_low_pfn; - high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; -#endif - printk(KERN_NOTICE "%ldMB LOWMEM available.\n", - pages_to_mb(max_low_pfn)); - printk(KERN_DEBUG "max_low_pfn = %lx, highstart_pfn = %lx\n", - max_low_pfn, highstart_pfn); - - printk(KERN_DEBUG "Low memory ends at vaddr %08lx\n", - (ulong) pfn_to_kaddr(max_low_pfn)); - for_each_online_node(nid) { - init_remap_allocator(nid); - - allocate_pgdat(nid); - } - remap_numa_kva(); - - printk(KERN_DEBUG "High memory starts at vaddr %08lx\n", - (ulong) pfn_to_kaddr(highstart_pfn)); - for_each_online_node(nid) - propagate_e820_map_node(nid); - - for_each_online_node(nid) - memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); - - NODE_DATA(0)->bdata = &bootmem_node_data[0]; - setup_bootmem_allocator(); -} - -void __init set_highmem_pages_init(void) -{ -#ifdef CONFIG_HIGHMEM - struct zone *zone; - int nid; - - for_each_zone(zone) { - unsigned long 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; - - nid = zone_to_nid(zone); - printk(KERN_INFO "Initializing %s for node %d (%08lx:%08lx)\n", - zone->name, nid, zone_start_pfn, zone_end_pfn); - - add_highpages_with_active_regions(nid, zone_start_pfn, - zone_end_pfn); - } - totalram_pages += totalhigh_pages; -#endif -} - -#ifdef CONFIG_MEMORY_HOTPLUG -static 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 - |
