1 files changed, 108 insertions, 0 deletions
diff --git a/include/asm-i386/topology.h b/include/asm-i386/topology.h
new file mode 100644
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+++ b/include/asm-i386/topology.h
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+/*
+ * linux/include/asm-i386/topology.h
+ *
+ * Written by: Matthew Dobson, IBM Corporation
+ *
+ * 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.
+ *
+ * Send feedback to <colpatch@us.ibm.com>
+ */
+#ifndef _ASM_I386_TOPOLOGY_H
+#define _ASM_I386_TOPOLOGY_H
+
+#ifdef CONFIG_NUMA
+
+#include <asm/mpspec.h>
+
+#include <linux/cpumask.h>
+
+/* Mappings between logical cpu number and node number */
+extern cpumask_t node_2_cpu_mask[];
+extern int cpu_2_node[];
+
+/* Returns the number of the node containing CPU 'cpu' */
+static inline int cpu_to_node(int cpu)
+{ 
+	return cpu_2_node[cpu];
+}
+
+/* Returns the number of the node containing Node 'node'.  This architecture is flat, 
+   so it is a pretty simple function! */
+#define parent_node(node) (node)
+
+/* Returns a bitmask of CPUs on Node 'node'. */
+static inline cpumask_t node_to_cpumask(int node)
+{
+	return node_2_cpu_mask[node];
+}
+
+/* Returns the number of the first CPU on Node 'node'. */
+static inline int node_to_first_cpu(int node)
+{ 
+	cpumask_t mask = node_to_cpumask(node);
+	return first_cpu(mask);
+}
+
+/* Returns the number of the node containing PCI bus number 'busnr' */
+static inline cpumask_t __pcibus_to_cpumask(int busnr)
+{
+	return node_to_cpumask(mp_bus_id_to_node[busnr]);
+}
+#define pcibus_to_cpumask(bus)	__pcibus_to_cpumask(bus->number)
+
+/* sched_domains SD_NODE_INIT for NUMAQ machines */
+#define SD_NODE_INIT (struct sched_domain) {		\
+	.span			= CPU_MASK_NONE,	\
+	.parent			= NULL,			\
+	.groups			= NULL,			\
+	.min_interval		= 8,			\
+	.max_interval		= 32,			\
+	.busy_factor		= 32,			\
+	.imbalance_pct		= 125,			\
+	.cache_hot_time		= (10*1000000),		\
+	.cache_nice_tries	= 1,			\
+	.per_cpu_gain		= 100,			\
+	.flags			= SD_LOAD_BALANCE	\
+				| SD_BALANCE_EXEC	\
+				| SD_BALANCE_NEWIDLE	\
+				| SD_WAKE_IDLE		\
+				| SD_WAKE_BALANCE,	\
+	.last_balance		= jiffies,		\
+	.balance_interval	= 1,			\
+	.nr_balance_failed	= 0,			\
+}
+
+extern unsigned long node_start_pfn[];
+extern unsigned long node_end_pfn[];
+extern unsigned long node_remap_size[];
+
+#define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
+
+#else /* !CONFIG_NUMA */
+/*
+ * Other i386 platforms should define their own version of the 
+ * above macros here.
+ */
+
+#include <asm-generic/topology.h>
+
+#endif /* CONFIG_NUMA */
+
+#endif /* _ASM_I386_TOPOLOGY_H */