summaryrefslogtreecommitdiffstats
path: root/kernel/arch/x86/mm/numa_32.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/arch/x86/mm/numa_32.c')
-rw-r--r--kernel/arch/x86/mm/numa_32.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/kernel/arch/x86/mm/numa_32.c b/kernel/arch/x86/mm/numa_32.c
new file mode 100644
index 000000000..47b6436e4
--- /dev/null
+++ b/kernel/arch/x86/mm/numa_32.c
@@ -0,0 +1,104 @@
+/*
+ * 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/bootmem.h>
+#include <linux/memblock.h>
+#include <linux/module.h>
+
+#include "numa_internal.h"
+
+#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_SECTIONS] __read_mostly = { [0 ... (MAX_SECTIONS - 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 " ");
+ start = round_down(start, PAGES_PER_SECTION);
+ end = round_up(end, PAGES_PER_SECTION);
+ for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) {
+ physnode_map[pfn / PAGES_PER_SECTION] = 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 highend_pfn, highstart_pfn;
+
+void __init initmem_init(void)
+{
+ x86_numa_init();
+
+#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));
+ high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
+#else
+ 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));
+
+ printk(KERN_DEBUG "High memory starts at vaddr %08lx\n",
+ (ulong) pfn_to_kaddr(highstart_pfn));
+
+ setup_bootmem_allocator();
+}