Initial import

1 files changed, 104 insertions, 0 deletions

diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
new file mode 100644
index 000000000..47b6436e4
--- /dev/null
+++ b/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();
+}