[PATCH] i386 driverfs Topology

From Matthew Dobson.

Update/Create i386 specific files for DriverFS Topology.

This patch creates the i386 specific files/functions/structures to
implement driverfs Topology.  These structures have the generic
CPU/MemBlk/Node structures embedded in them.

This patch also creates the arch-specific initialization routine to
instantiate the topology.

arch/i386/mach-generic/Makefile

@@ -4,6 +4,6 @@
 
 EXTRA_CFLAGS	+= -I../kernel
 
-obj-y				:= setup.o
+obj-y				:= setup.o topology.o
 
 include $(TOPDIR)/Rules.make

arch/i386/mach-generic/topology.c

+/*
+ * arch/i386/mach-generic/topology.c - Populate driverfs with topology information
+ *
+ * Written by: Matthew Dobson, IBM Corporation
+ * Original Code: Paul Dorwin, IBM Corporation, Patrick Mochel, OSDL
+ *
+ * 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>
+ */
+#include <linux/init.h>
+#include <asm/cpu.h>
+
+struct i386_cpu cpu_devices[NR_CPUS];
+
+#ifdef CONFIG_NUMA
+#include <linux/mmzone.h>
+#include <asm/node.h>
+#include <asm/memblk.h>
+
+struct i386_node node_devices[MAX_NUMNODES];
+struct i386_memblk memblk_devices[MAX_NR_MEMBLKS];
+
+extern int numnodes;
+
+static int __init topology_init(void)
+{
+	int i;
+
+	for (i = 0; i < numnodes; i++)
+		arch_register_node(i);
+	for (i = 0; i < NR_CPUS; i++)
+		if (cpu_possible(i)) arch_register_cpu(i);
+	for (i = 0; i < numnodes; i++)
+		arch_register_memblk(i);
+	return 0;
+}
+
+#else /* !CONFIG_NUMA */
+
+static int __init topology_init(void)
+{
+	int i;
+
+	for (i = 0; i < NR_CPUS; i++)
+		if (cpu_possible(i)) arch_register_cpu(i);
+	return 0;
+}
+
+#endif /* CONFIG_NUMA */
+
+subsys_initcall(topology_init);

include/asm-i386/cpu.h

+#ifndef _ASM_I386_CPU_H_
+#define _ASM_I386_CPU_H_
+
+#include <linux/device.h>
+#include <linux/cpu.h>
+
+#include <asm/topology.h>
+#include <asm/node.h>
+
+struct i386_cpu {
+	struct cpu cpu;
+};
+extern struct i386_cpu cpu_devices[NR_CPUS];
+
+
+#ifdef CONFIG_NUMA
+static inline void arch_register_cpu(int num){
+	int p_node = __cpu_to_node(num);
+	
+	if (p_node >= 0 && p_node < NR_CPUS)
+		register_cpu(&cpu_devices[num].cpu, num, 
+			&node_devices[p_node].node);
+}
+#else /* !CONFIG_NUMA */
+static inline void arch_register_cpu(int num){
+	register_cpu(&cpu_devices[num].cpu, num, (struct node *) NULL);
+}
+#endif /* CONFIG_NUMA */
+
+#endif /* _ASM_I386_CPU_H_ */

include/asm-i386/memblk.h

+#ifndef _ASM_I386_MEMBLK_H_
+#define _ASM_I386_MEMBLK_H_
+
+#include <linux/device.h>
+#include <linux/mmzone.h>
+#include <linux/memblk.h>
+
+#include <asm/topology.h>
+#include <asm/node.h>
+
+struct i386_memblk {
+	struct memblk memblk;
+};
+extern struct i386_memblk memblk_devices[MAX_NR_MEMBLKS];
+
+static inline void arch_register_memblk(int num){
+	int p_node = __memblk_to_node(num);
+
+	if (p_node >= 0 && p_node < MAX_NR_MEMBLKS)
+		register_memblk(&memblk_devices[num].memblk, num, 
+			&node_devices[p_node].node);
+}
+
+#endif /* _ASM_I386_MEMBLK_H_ */

include/asm-i386/node.h

+#ifndef _ASM_I386_NODE_H_
+#define _ASM_I386_NODE_H_
+
+#include <linux/device.h>
+#include <linux/mmzone.h>
+#include <linux/node.h>
+
+#include <asm/topology.h>
+
+struct i386_node {
+	struct node node;
+};
+extern struct i386_node node_devices[MAX_NUMNODES];
+
+static inline void arch_register_node(int num){
+	int p_node = __parent_node(num);
+
+	if (p_node != num)
+		register_node(&node_devices[num].node, num, 
+			&node_devices[p_node].node);
+	else
+		register_node(&node_devices[num].node, num, 
+			(struct node *) NULL);
+}
+
+#endif /* _ASM_I386_NODE_H_ */