[patch] NUMA API for 2.5.12 (3/4)

From: Matthew Dobson <colpatch@us.ibm.com>
To: linux-kernel@vger.kernel.org, torvalds@transmeta.com
Cc: mjbligh@us.ibm.com, lse-tech@lists.sourceforge.net,
	rml@tech9.net, efocht@ess.nec.de
Subject: [patch] NUMA API for 2.5.12 (3/4)
Date: Thu, 02 May 2002 15:52:31 -0700	[thread overview]
Message-ID: <3CD1C32F.AAB144B5@us.ibm.com> (raw)

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Ooops...  sent out two labeled (1/4)...  The second (1/4) was actually (3/4). 
Sending again to avoid _too_ much confusion!

Cheers!

-Matt
colpatch@us.ibm.com

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diff -Nur linux-2.5.12-vanilla/arch/i386/Config.help linux-2.5.12-api/arch/i386/Config.help

--- linux-2.5.12-vanilla/arch/i386/Config.help	Sun Apr 28 20:11:34 2002
+++ linux-2.5.12-api/arch/i386/Config.help	Wed May  1 17:21:13 2002
@@ -48,6 +48,13 @@
   You will need a new lynxer.elf file to flash your firmware with - send
   email to Martin.Bligh@us.ibm.com
 
+CONFIG_NUMA_API
+  This option is used to turn on support for the NUMA API, which allows
+  the binding of processes to specific processors/nodes/memory blocks.
+  This option is also used for some of the NUMA Topology features.
+  Please email Matthew Dobson <colpatch@us.ibm.com> with questions
+  and/or concerns.
+
 CONFIG_X86_UP_IOAPIC
   An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
   SMP-capable replacement for PC-style interrupt controllers. Most
diff -Nur linux-2.5.12-vanilla/arch/i386/config.in linux-2.5.12-api/arch/i386/config.in
--- linux-2.5.12-vanilla/arch/i386/config.in	Sun Apr 28 20:12:15 2002
+++ linux-2.5.12-api/arch/i386/config.in	Wed May  1 17:21:13 2002
@@ -198,6 +198,7 @@
    fi
 else
    bool 'Multiquad NUMA system' CONFIG_MULTIQUAD
+   bool 'Non-Uniform Memory Access API support' CONFIG_NUMA_API
 fi
 
 if [ "$CONFIG_SMP" = "y" -o "$CONFIG_PREEMPT" = "y" ]; then
diff -Nur linux-2.5.12-vanilla/include/asm-i386/core_ibmnumaq.h linux-2.5.12-api/include/asm-i386/core_ibmnumaq.h
--- linux-2.5.12-vanilla/include/asm-i386/core_ibmnumaq.h	Wed Dec 31 16:00:00 1969
+++ linux-2.5.12-api/include/asm-i386/core_ibmnumaq.h	Wed May  1 17:24:25 2002
@@ -0,0 +1,60 @@
+/*
+ * linux/include/asm-i386/mmzone.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_CORE_IBMNUMAQ_H_
+#define _ASM_CORE_IBMNUMAQ_H_
+
+/*
+ * These functions need to be defined for every architecture.
+ * The first five are necessary for the NUMA API to function.
+ * The last is needed by several pieces of NUMA code.
+ */
+
+/* Returns the number of the node containing CPU 'cpu' */
+#define _cpu_to_node(cpu)	(cpu_to_logical_apicid(cpu) >> 4)
+
+/* Returns the number of the node containing MemBlk 'memblk' */
+#define _memblk_to_node(memblk)	(memblk)
+
+/* Returns the number of the node containing Node 'nid'.  This architecture is flat, 
+   so it is a pretty simple function. */
+#define _node_to_node(nid)	(nid)
+
+/* Returns the number of the first CPU on Node 'node' */
+static inline int _node_to_cpu(int node)
+{
+	int i, cpu, logical_apicid = node << 4;
+
+	for(i = 1; i < 16; i <<= 1)
+		if ((cpu = logical_apicid_to_cpu(logical_apicid | i)) >= 0)
+			return cpu;
+
+	return 0;
+}
+
+/* Returns the number of the first MemBlk on Node 'node' */
+#define _node_to_memblk(node)	(node)
+
+#endif /* _ASM_CORE_IBMNUMAQ_H_ */
diff -Nur linux-2.5.12-vanilla/include/asm-i386/mmzone.h linux-2.5.12-api/include/asm-i386/mmzone.h
--- linux-2.5.12-vanilla/include/asm-i386/mmzone.h	Wed Dec 31 16:00:00 1969
+++ linux-2.5.12-api/include/asm-i386/mmzone.h	Wed May  1 17:24:25 2002
@@ -0,0 +1,44 @@
+/*
+ * linux/include/asm-i386/mmzone.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_MMZONE_H_
+#define _ASM_MMZONE_H_
+
+#include <asm/smpboot.h>
+
+#ifdef CONFIG_IBMNUMAQ
+#include <asm/core_ibmnumaq.h>
+#else /* !CONFIG_IBMNUMAQ */
+#define _cpu_to_node(cpu)	(0)
+#define _memblk_to_node(memblk)	(0)
+#define _node_to_node(nid)	(0)
+#define _node_to_cpu(node)	(0)
+#define _node_to_memblk(node)	(0)
+#endif /* CONFIG_IBMNUMAQ */
+
+/* Returns the number of the current Node. */
+#define numa_node_id()		(_cpu_to_node(smp_processor_id()))
+
+#endif /* _ASM_MMZONE_H_ */
