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[PATCH 13/15] MIPS: Netlogic: Make number of nodes configurable

To: linux-mips@linux-mips.org, ralf@linux-mips.org
Subject: [PATCH 13/15] MIPS: Netlogic: Make number of nodes configurable
From: "Jayachandran C" <jchandra@broadcom.com>
Date: Wed, 31 Oct 2012 18:31:40 +0530
Cc: "Jayachandran C" <jchandra@broadcom.com>
In-reply-to: <cover.1351688140.git.jchandra@broadcom.com>
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There can be 1, 2 or 4 SoCs(nodes) in a multi-chip XLP board. Add an
option for multi-chip boards in case of XLP, and make the number of
nodes configurable.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
---
 arch/mips/include/asm/mach-netlogic/irq.h        |    4 +-
 arch/mips/include/asm/mach-netlogic/multi-node.h |   54 ++++++++++++++++++++++
 arch/mips/include/asm/netlogic/common.h          |    9 ++--
 arch/mips/netlogic/Kconfig                       |   28 +++++++++++
 4 files changed, 90 insertions(+), 5 deletions(-)
 create mode 100644 arch/mips/include/asm/mach-netlogic/multi-node.h

diff --git a/arch/mips/include/asm/mach-netlogic/irq.h 
b/arch/mips/include/asm/mach-netlogic/irq.h
index b590245..868ed8a 100644
--- a/arch/mips/include/asm/mach-netlogic/irq.h
+++ b/arch/mips/include/asm/mach-netlogic/irq.h
@@ -8,7 +8,9 @@
 #ifndef __ASM_NETLOGIC_IRQ_H
 #define __ASM_NETLOGIC_IRQ_H
 
-#define NR_IRQS                        64
+#include <asm/mach-netlogic/multi-node.h>
+#define NR_IRQS                        (64 * NLM_NR_NODES)
+
 #define MIPS_CPU_IRQ_BASE      0
 
 #endif /* __ASM_NETLOGIC_IRQ_H */
diff --git a/arch/mips/include/asm/mach-netlogic/multi-node.h 
b/arch/mips/include/asm/mach-netlogic/multi-node.h
new file mode 100644
index 0000000..d62fc77
--- /dev/null
+++ b/arch/mips/include/asm/mach-netlogic/multi-node.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2003-2012 Broadcom Corporation
+ * All Rights Reserved
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the Broadcom
+ * license below:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _NETLOGIC_MULTI_NODE_H_
+#define _NETLOGIC_MULTI_NODE_H_
+
+#ifndef CONFIG_NLM_MULTINODE
+#define NLM_NR_NODES           1
+#else
+#if defined(CONFIG_NLM_MULTINODE_2)
+#define NLM_NR_NODES           2
+#elif defined(CONFIG_NLM_MULTINODE_4)
+#define NLM_NR_NODES           4
+#else
+#define NLM_NR_NODES           1
+#endif
+#endif
+
+#define NLM_CORES_PER_NODE     8
+#define NLM_THREADS_PER_CORE   4
+#define NLM_CPUS_PER_NODE      (NLM_CORES_PER_NODE * NLM_THREADS_PER_CORE)
+
+#endif
diff --git a/arch/mips/include/asm/netlogic/common.h 
b/arch/mips/include/asm/netlogic/common.h
index 2eb39fa..3c6814e 100644
--- a/arch/mips/include/asm/netlogic/common.h
+++ b/arch/mips/include/asm/netlogic/common.h
@@ -48,6 +48,7 @@
 #include <linux/cpumask.h>
 #include <linux/spinlock.h>
 #include <asm/irq.h>
+#include <asm/mach-netlogic/multi-node.h>
 
 struct irq_desc;
 void nlm_smp_function_ipi_handler(unsigned int irq, struct irq_desc *desc);
@@ -86,12 +87,12 @@ struct nlm_soc_info {
        spinlock_t piclock;
 };
 
-#define NLM_CORES_PER_NODE     8
-#define NLM_THREADS_PER_CORE   4
-#define NLM_CPUS_PER_NODE      (NLM_CORES_PER_NODE * NLM_THREADS_PER_CORE)
 #define        nlm_get_node(i)         (&nlm_nodes[i])
-#define NLM_NR_NODES           1
+#ifdef CONFIG_CPU_XLR
 #define        nlm_current_node()      (&nlm_nodes[0])
+#else
+#define nlm_current_node()     (&nlm_nodes[nlm_nodeid()])
+#endif
 
 struct irq_data;
 uint64_t nlm_pci_irqmask(int node);
diff --git a/arch/mips/netlogic/Kconfig b/arch/mips/netlogic/Kconfig
index 8059eb7..3c05bf9 100644
--- a/arch/mips/netlogic/Kconfig
+++ b/arch/mips/netlogic/Kconfig
@@ -9,6 +9,34 @@ config DT_XLP_EVP
          This DTB will be used if the firmware does not pass in a DTB
           pointer to the kernel.  The corresponding DTS file is at
           arch/mips/netlogic/dts/xlp_evp.dts
+
+config NLM_MULTINODE
+       bool "Support for multi-chip boards"
+       depends on NLM_XLP_BOARD
+       default n
+       help
+         Add support for boards with 2 or 4 XLPs connected over ICI.
+
+if NLM_MULTINODE
+choice
+       prompt "Number of XLPs on the board"
+       default NLM_MULTINODE_2
+       help
+         In the multi-node case, specify the number of SoCs on the board.
+
+config NLM_MULTINODE_2
+       bool "Dual-XLP board"
+       help
+         Support boards with upto two XLPs connected over ICI.
+
+config NLM_MULTINODE_4
+       bool "Quad-XLP board"
+       help
+         Support boards with upto four XLPs connected over ICI.
+
+endchoice
+
+endif
 endif
 
 config NLM_COMMON
-- 
1.7.9.5



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