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authorHauke Mehrtens <hauke@hauke-m.de>2015-12-02 15:23:08 +0000
committerHauke Mehrtens <hauke@hauke-m.de>2015-12-02 15:23:08 +0000
commit0e73da37d5b0edd7918dd3f9ee025a2167d0f788 (patch)
tree34daa49e211f8bf0711bd5bfd468f6ab52227927 /target/linux/bcm53xx
parentc03f264f6d8a00249ab86574884c615ea8fda5a4 (diff)
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bcm53xx: update SMP patches
Broadcom submitted new SMP patches for this SoC to upstream Linux, add them to OpenWrt. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> SVN-Revision: 47687
Diffstat (limited to 'target/linux/bcm53xx')
-rw-r--r--target/linux/bcm53xx/patches-4.1/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch69
-rw-r--r--target/linux/bcm53xx/patches-4.1/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch206
-rw-r--r--target/linux/bcm53xx/patches-4.1/133-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch (renamed from target/linux/bcm53xx/patches-4.1/130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch)325
-rw-r--r--target/linux/bcm53xx/patches-4.1/134-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch (renamed from target/linux/bcm53xx/patches-4.1/131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch)28
-rw-r--r--target/linux/bcm53xx/patches-4.3/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch69
-rw-r--r--target/linux/bcm53xx/patches-4.3/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch206
-rw-r--r--target/linux/bcm53xx/patches-4.3/133-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch (renamed from target/linux/bcm53xx/patches-4.3/130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch)325
-rw-r--r--target/linux/bcm53xx/patches-4.3/134-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch (renamed from target/linux/bcm53xx/patches-4.3/131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch)28
8 files changed, 836 insertions, 420 deletions
diff --git a/target/linux/bcm53xx/patches-4.1/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch b/target/linux/bcm53xx/patches-4.1/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch
new file mode 100644
index 0000000000..ce002a29da
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.1/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch
@@ -0,0 +1,69 @@
+From 204b9dbd7c4bd5a223fd104b9cba56c12fe04add Mon Sep 17 00:00:00 2001
+From: Kapil Hali <kapilh@broadcom.com>
+Date: Wed, 19 Aug 2015 13:42:23 -0400
+Subject: [PATCH 130/134] dt-bindings: add SMP enable-method for Broadcom NSP
+
+Add a compatible string "brcm,bcm-nsp-smp" for Broadcom's
+Northstar Plus CPU to the 32-bit ARM CPU device tree binding
+documentation file and create a new binding documentation for
+Northstar Plus CPU.
+
+Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+---
+ .../bindings/arm/bcm/brcm,nsp-cpu-method.txt | 39 ++++++++++++++++++++++
+ Documentation/devicetree/bindings/arm/cpus.txt | 1 +
+ 2 files changed, 40 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
+@@ -0,0 +1,39 @@
++Broadcom Northstar Plus SoC CPU Enable Method
++---------------------------------------------
++This binding defines the enable method used for starting secondary
++CPUs in the following Broadcom SoCs:
++ BCM58522, BCM58525, BCM58535, BCM58622, BCM58623, BCM58625, BCM88312
++
++The enable method is specified by defining the following required
++properties in the "cpus" device tree node:
++ - enable-method = "brcm,bcm-nsp-smp";
++ - secondary-boot-reg = <...>;
++
++The secondary-boot-reg property is a u32 value that specifies the
++physical address of the register which should hold the common
++entry point for a secondary CPU. This entry is cpu node specific
++and should be added per cpu. E.g., in case of NSP (BCM58625) which
++is a dual core CPU SoC, this entry should be added to cpu1 node.
++
++
++Example:
++ cpus {
++ #address-cells = <1>;
++ #size-cells = <0>;
++ enable-method = "brcm,bcm-nsp-smp";
++
++ cpu0: cpu@0 {
++ device_type = "cpu";
++ compatible = "arm,cortex-a9";
++ next-level-cache = <&L2>;
++ reg = <0>;
++ };
++
++ cpu1: cpu@1 {
++ device_type = "cpu";
++ compatible = "arm,cortex-a9";
++ next-level-cache = <&L2>;
++ reg = <1>;
++ secondary-boot-reg = <0xffff042c>;
++ };
++ };
+--- a/Documentation/devicetree/bindings/arm/cpus.txt
++++ b/Documentation/devicetree/bindings/arm/cpus.txt
+@@ -189,6 +189,7 @@ nodes to be present and contain the prop
+ can be one of:
+ "allwinner,sun6i-a31"
+ "arm,psci"
++ "brcm,bcm-nsp-smp"
+ "brcm,brahma-b15"
+ "marvell,armada-375-smp"
+ "marvell,armada-380-smp"
diff --git a/target/linux/bcm53xx/patches-4.1/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch b/target/linux/bcm53xx/patches-4.1/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch
new file mode 100644
index 0000000000..7a48a13e64
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.1/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch
@@ -0,0 +1,206 @@
+From 8622d6da5d95293d474c156612fd819fdaf542ec Mon Sep 17 00:00:00 2001
+From: Kapil Hali <kapilh@broadcom.com>
+Date: Wed, 25 Nov 2015 08:58:53 -0500
+Subject: [PATCH 131/134] ARM: BCM: Clean up SMP support for Broadcom Kona
+
+These changes cleans up SMP implementaion for Broadcom's
+Kona SoC which are required for handling SMP for iProc
+family of SoCs at a single place for BCM NSP and BCM Kona.
+
+Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+---
+ arch/arm/boot/dts/bcm11351.dtsi | 2 +-
+ arch/arm/boot/dts/bcm21664.dtsi | 2 +-
+ arch/arm/mach-bcm/kona_smp.c | 82 +++++++++++++++++++++++++++--------------
+ 3 files changed, 56 insertions(+), 30 deletions(-)
+
+--- a/arch/arm/boot/dts/bcm11351.dtsi
++++ b/arch/arm/boot/dts/bcm11351.dtsi
+@@ -31,7 +31,6 @@
+ #address-cells = <1>;
+ #size-cells = <0>;
+ enable-method = "brcm,bcm11351-cpu-method";
+- secondary-boot-reg = <0x3500417c>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+@@ -42,6 +41,7 @@
+ cpu1: cpu@1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a9";
++ secondary-boot-reg = <0x3500417c>;
+ reg = <1>;
+ };
+ };
+--- a/arch/arm/boot/dts/bcm21664.dtsi
++++ b/arch/arm/boot/dts/bcm21664.dtsi
+@@ -31,7 +31,6 @@
+ #address-cells = <1>;
+ #size-cells = <0>;
+ enable-method = "brcm,bcm11351-cpu-method";
+- secondary-boot-reg = <0x35004178>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+@@ -42,6 +41,7 @@
+ cpu1: cpu@1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a9";
++ secondary-boot-reg = <0x35004178>;
+ reg = <1>;
+ };
+ };
+--- a/arch/arm/mach-bcm/kona_smp.c
++++ b/arch/arm/mach-bcm/kona_smp.c
+@@ -1,5 +1,5 @@
+ /*
+- * Copyright (C) 2014 Broadcom Corporation
++ * Copyright (C) 2014-2015 Broadcom Corporation
+ * Copyright 2014 Linaro Limited
+ *
+ * This program is free software; you can redistribute it and/or
+@@ -30,9 +30,10 @@
+
+ /* Name of device node property defining secondary boot register location */
+ #define OF_SECONDARY_BOOT "secondary-boot-reg"
++#define MPIDR_CPUID_BITMASK 0x3
+
+ /* I/O address of register used to coordinate secondary core startup */
+-static u32 secondary_boot;
++static u32 secondary_boot_addr;
+
+ /*
+ * Enable the Cortex A9 Snoop Control Unit
+@@ -78,44 +79,68 @@ static int __init scu_a9_enable(void)
+ static void __init bcm_smp_prepare_cpus(unsigned int max_cpus)
+ {
+ static cpumask_t only_cpu_0 = { CPU_BITS_CPU0 };
+- struct device_node *node;
++ struct device_node *cpus_node = NULL;
++ struct device_node *cpu_node = NULL;
+ int ret;
+
+- BUG_ON(secondary_boot); /* We're called only once */
+-
+ /*
+ * This function is only called via smp_ops->smp_prepare_cpu().
+ * That only happens if a "/cpus" device tree node exists
+ * and has an "enable-method" property that selects the SMP
+ * operations defined herein.
+ */
+- node = of_find_node_by_path("/cpus");
+- BUG_ON(!node);
+-
+- /*
+- * Our secondary enable method requires a "secondary-boot-reg"
+- * property to specify a register address used to request the
+- * ROM code boot a secondary code. If we have any trouble
+- * getting this we fall back to uniprocessor mode.
+- */
+- if (of_property_read_u32(node, OF_SECONDARY_BOOT, &secondary_boot)) {
+- pr_err("%s: missing/invalid " OF_SECONDARY_BOOT " property\n",
+- node->name);
+- ret = -ENOENT; /* Arrange to disable SMP */
+- goto out;
++ cpus_node = of_find_node_by_path("/cpus");
++ if (!cpus_node)
++ return;
++
++ for_each_child_of_node(cpus_node, cpu_node) {
++ u32 cpuid;
++
++ if (of_node_cmp(cpu_node->type, "cpu"))
++ continue;
++
++ if (of_property_read_u32(cpu_node, "reg", &cpuid)) {
++ pr_debug("%s: missing reg property\n",
++ cpu_node->full_name);
++ ret = -ENOENT;
++ goto out;
++ }
++
++ /*
++ * "secondary-boot-reg" property should be defined only
++ * for secondary cpu
++ */
++ if ((cpuid & MPIDR_CPUID_BITMASK) == 1) {
++ /*
++ * Our secondary enable method requires a
++ * "secondary-boot-reg" property to specify a register
++ * address used to request the ROM code boot a secondary
++ * core. If we have any trouble getting this we fall
++ * back to uniprocessor mode.
++ */
++ if (of_property_read_u32(cpu_node,
++ OF_SECONDARY_BOOT,
++ &secondary_boot_addr)) {
++ pr_warn("%s: no" OF_SECONDARY_BOOT "property\n",
++ cpu_node->name);
++ ret = -ENOENT;
++ goto out;
++ }
++ }
+ }
+
+ /*
+- * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
++ * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
+ * returned, the SoC reported a uniprocessor configuration.
+ * We bail on any other error.
+ */
+ ret = scu_a9_enable();
+ out:
+- of_node_put(node);
++ of_node_put(cpu_node);
++ of_node_put(cpus_node);
++
+ if (ret) {
+ /* Update the CPU present map to reflect uniprocessor mode */
+- BUG_ON(ret != -ENOENT);
+ pr_warn("disabling SMP\n");
+ init_cpu_present(&only_cpu_0);
+ }
+@@ -139,7 +164,7 @@ out:
+ * - Wait for the secondary boot register to be re-written, which
+ * indicates the secondary core has started.
+ */
+-static int bcm_boot_secondary(unsigned int cpu, struct task_struct *idle)
++static int kona_boot_secondary(unsigned int cpu, struct task_struct *idle)
+ {
+ void __iomem *boot_reg;
+ phys_addr_t boot_func;
+@@ -154,15 +179,16 @@ static int bcm_boot_secondary(unsigned i
+ return -EINVAL;
+ }
+
+- if (!secondary_boot) {
++ if (!secondary_boot_addr) {
+ pr_err("required secondary boot register not specified\n");
+ return -EINVAL;
+ }
+
+- boot_reg = ioremap_nocache((phys_addr_t)secondary_boot, sizeof(u32));
++ boot_reg = ioremap_nocache(
++ (phys_addr_t)secondary_boot_addr, sizeof(u32));
+ if (!boot_reg) {
+ pr_err("unable to map boot register for cpu %u\n", cpu_id);
+- return -ENOSYS;
++ return -ENOMEM;
+ }
+
+ /*
+@@ -191,12 +217,12 @@ static int bcm_boot_secondary(unsigned i
+
+ pr_err("timeout waiting for cpu %u to start\n", cpu_id);
+
+- return -ENOSYS;
++ return -ENXIO;
+ }
+
+ static struct smp_operations bcm_smp_ops __initdata = {
+ .smp_prepare_cpus = bcm_smp_prepare_cpus,
+- .smp_boot_secondary = bcm_boot_secondary,
++ .smp_boot_secondary = kona_boot_secondary,
+ };
+ CPU_METHOD_OF_DECLARE(bcm_smp_bcm281xx, "brcm,bcm11351-cpu-method",
+ &bcm_smp_ops);
diff --git a/target/linux/bcm53xx/patches-4.1/130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch b/target/linux/bcm53xx/patches-4.1/133-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch
index 5e3bd7793d..14a1da1eb5 100644
--- a/target/linux/bcm53xx/patches-4.1/130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch
+++ b/target/linux/bcm53xx/patches-4.1/133-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch
@@ -1,12 +1,12 @@
-From a0ad1511d5805b95ac4c454d7904c670a1696055 Mon Sep 17 00:00:00 2001
+From e99fb6d01cddf38cffc11655aba4a96a981d604e Mon Sep 17 00:00:00 2001
From: Kapil Hali <kapilh@broadcom.com>
-Date: Wed, 14 Oct 2015 13:47:00 -0400
-Subject: [PATCH] ARM: BCM: Add SMP support for Broadcom NSP
+Date: Wed, 25 Nov 2015 13:25:55 -0500
+Subject: [PATCH 133/134] ARM: BCM: Add SMP support for Broadcom NSP
-Add SMP support for Broadcom's Northstar Plus SoC,
-cpu enable method and pen_release procedures. This
-changes also consolidates iProc family's - BCM NSP
-and BCM Kona, SMP handling in a common file.
+Add SMP support for Broadcom's Northstar Plus SoC
+cpu enable method. This changes also consolidates
+iProc family's - BCM NSP and BCM Kona, platform
+SMP handling in a common file.
Northstar Plus SoC is based on ARM Cortex-A9
revision r3p0 which requires configuration for ARM
@@ -15,14 +15,11 @@ configuration option.
Signed-off-by: Kapil Hali <kapilh@broadcom.com>
---
- arch/arm/mach-bcm/Makefile | 2 +-
- arch/arm/mach-bcm/bcm_nsp.h | 19 +++
- arch/arm/mach-bcm/headsmp.S | 37 +++++
- arch/arm/mach-bcm/kona_smp.c | 202 ---------------------------
- arch/arm/mach-bcm/platsmp.c | 326 +++++++++++++++++++++++++++++++++++++++++++
- 5 files changed, 383 insertions(+), 203 deletions(-)
- create mode 100644 arch/arm/mach-bcm/bcm_nsp.h
- create mode 100644 arch/arm/mach-bcm/headsmp.S
+ arch/arm/mach-bcm/Kconfig | 2 +
+ arch/arm/mach-bcm/Makefile | 8 +-
+ arch/arm/mach-bcm/kona_smp.c | 228 ----------------------------------
+ arch/arm/mach-bcm/platsmp.c | 290 +++++++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 298 insertions(+), 230 deletions(-)
delete mode 100644 arch/arm/mach-bcm/kona_smp.c
create mode 100644 arch/arm/mach-bcm/platsmp.c
@@ -37,73 +34,11 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
# BCM281XX and BCM21664 L2 cache control
obj-$(CONFIG_ARCH_BCM_MOBILE_L2_CACHE) += kona_l2_cache.o
---- /dev/null
-+++ b/arch/arm/mach-bcm/bcm_nsp.h
-@@ -0,0 +1,19 @@
-+/*
-+ * Copyright (C) 2015 Broadcom Corporation
-+ *
-+ * 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 version 2.
-+ *
-+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
-+ * kind, whether express or implied; without even the implied warranty
-+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#ifndef __BCM_NSP_H
-+#define __BCM_NSP_H
-+
-+extern void nsp_secondary_startup(void);
-+
-+#endif /* __BCM_NSP_H */
---- /dev/null
-+++ b/arch/arm/mach-bcm/headsmp.S
-@@ -0,0 +1,37 @@
-+/*
-+ * Copyright (C) 2015 Broadcom Corporation
-+ *
-+ * 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 version 2.
-+ *
-+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
-+ * kind, whether express or implied; without even the implied warranty
-+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#include <linux/linkage.h>
-+
-+/*
-+ * iProc specific entry point for secondary CPUs. This provides
-+ * a "holding pen" into which all secondary cores are held until
-+ * we are ready for them to initialise.
-+ */
-+ENTRY(nsp_secondary_startup)
-+ mrc p15, 0, r0, c0, c0, 5
-+ and r0, r0, #15
-+ adr r4, 1f
-+ ldmia r4, {r5, r6}
-+ sub r4, r4, r5
-+ add r6, r6, r4
-+pen: ldr r7, [r6]
-+ cmp r7, r0
-+ bne pen
-+
-+ b secondary_startup
-+
-+1: .long .
-+ .long pen_release
-+
-+ENDPROC(nsp_secondary_startup)
--- a/arch/arm/mach-bcm/kona_smp.c
+++ /dev/null
-@@ -1,202 +0,0 @@
+@@ -1,228 +0,0 @@
-/*
-- * Copyright (C) 2014 Broadcom Corporation
+- * Copyright (C) 2014-2015 Broadcom Corporation
- * Copyright 2014 Linaro Limited
- *
- * This program is free software; you can redistribute it and/or
@@ -134,9 +69,10 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
-
-/* Name of device node property defining secondary boot register location */
-#define OF_SECONDARY_BOOT "secondary-boot-reg"
+-#define MPIDR_CPUID_BITMASK 0x3
-
-/* I/O address of register used to coordinate secondary core startup */
--static u32 secondary_boot;
+-static u32 secondary_boot_addr;
-
-/*
- * Enable the Cortex A9 Snoop Control Unit
@@ -182,44 +118,68 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
-static void __init bcm_smp_prepare_cpus(unsigned int max_cpus)
-{
- static cpumask_t only_cpu_0 = { CPU_BITS_CPU0 };
-- struct device_node *node;
+- struct device_node *cpus_node = NULL;
+- struct device_node *cpu_node = NULL;
- int ret;
-
-- BUG_ON(secondary_boot); /* We're called only once */
--
- /*
- * This function is only called via smp_ops->smp_prepare_cpu().
- * That only happens if a "/cpus" device tree node exists
- * and has an "enable-method" property that selects the SMP
- * operations defined herein.
- */
-- node = of_find_node_by_path("/cpus");
-- BUG_ON(!node);
+- cpus_node = of_find_node_by_path("/cpus");
+- if (!cpus_node)
+- return;
-
-- /*
-- * Our secondary enable method requires a "secondary-boot-reg"
-- * property to specify a register address used to request the
-- * ROM code boot a secondary code. If we have any trouble
-- * getting this we fall back to uniprocessor mode.
-- */
-- if (of_property_read_u32(node, OF_SECONDARY_BOOT, &secondary_boot)) {
-- pr_err("%s: missing/invalid " OF_SECONDARY_BOOT " property\n",
-- node->name);
-- ret = -ENOENT; /* Arrange to disable SMP */
-- goto out;
+- for_each_child_of_node(cpus_node, cpu_node) {
+- u32 cpuid;
+-
+- if (of_node_cmp(cpu_node->type, "cpu"))
+- continue;
+-
+- if (of_property_read_u32(cpu_node, "reg", &cpuid)) {
+- pr_debug("%s: missing reg property\n",
+- cpu_node->full_name);
+- ret = -ENOENT;
+- goto out;
+- }
+-
+- /*
+- * "secondary-boot-reg" property should be defined only
+- * for secondary cpu
+- */
+- if ((cpuid & MPIDR_CPUID_BITMASK) == 1) {
+- /*
+- * Our secondary enable method requires a
+- * "secondary-boot-reg" property to specify a register
+- * address used to request the ROM code boot a secondary
+- * core. If we have any trouble getting this we fall
+- * back to uniprocessor mode.
+- */
+- if (of_property_read_u32(cpu_node,
+- OF_SECONDARY_BOOT,
+- &secondary_boot_addr)) {
+- pr_warn("%s: no" OF_SECONDARY_BOOT "property\n",
+- cpu_node->name);
+- ret = -ENOENT;
+- goto out;
+- }
+- }
- }
-
- /*
-- * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
+- * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
- * returned, the SoC reported a uniprocessor configuration.
- * We bail on any other error.
- */
- ret = scu_a9_enable();
-out:
-- of_node_put(node);
+- of_node_put(cpu_node);
+- of_node_put(cpus_node);
+-
- if (ret) {
- /* Update the CPU present map to reflect uniprocessor mode */
-- BUG_ON(ret != -ENOENT);
- pr_warn("disabling SMP\n");
- init_cpu_present(&only_cpu_0);
- }
@@ -243,7 +203,7 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
- * - Wait for the secondary boot register to be re-written, which
- * indicates the secondary core has started.
- */
--static int bcm_boot_secondary(unsigned int cpu, struct task_struct *idle)
+-static int kona_boot_secondary(unsigned int cpu, struct task_struct *idle)
-{
- void __iomem *boot_reg;
- phys_addr_t boot_func;
@@ -258,15 +218,16 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
- return -EINVAL;
- }
-
-- if (!secondary_boot) {
+- if (!secondary_boot_addr) {
- pr_err("required secondary boot register not specified\n");
- return -EINVAL;
- }
-
-- boot_reg = ioremap_nocache((phys_addr_t)secondary_boot, sizeof(u32));
+- boot_reg = ioremap_nocache(
+- (phys_addr_t)secondary_boot_addr, sizeof(u32));
- if (!boot_reg) {
- pr_err("unable to map boot register for cpu %u\n", cpu_id);
-- return -ENOSYS;
+- return -ENOMEM;
- }
-
- /*
@@ -295,18 +256,18 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
-
- pr_err("timeout waiting for cpu %u to start\n", cpu_id);
-
-- return -ENOSYS;
+- return -ENXIO;
-}
-
-static struct smp_operations bcm_smp_ops __initdata = {
- .smp_prepare_cpus = bcm_smp_prepare_cpus,
-- .smp_boot_secondary = bcm_boot_secondary,
+- .smp_boot_secondary = kona_boot_secondary,
-};
-CPU_METHOD_OF_DECLARE(bcm_smp_bcm281xx, "brcm,bcm11351-cpu-method",
- &bcm_smp_ops);
--- /dev/null
+++ b/arch/arm/mach-bcm/platsmp.c
-@@ -0,0 +1,326 @@
+@@ -0,0 +1,290 @@
+/*
+ * Copyright (C) 2014-2015 Broadcom Corporation
+ * Copyright 2014 Linaro Limited
@@ -336,8 +297,6 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
-+#include "bcm_nsp.h"
-+
+/* Size of mapped Cortex A9 SCU address space */
+#define CORTEX_A9_SCU_SIZE 0x58
+
@@ -346,27 +305,10 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+
+/* Name of device node property defining secondary boot register location */
+#define OF_SECONDARY_BOOT "secondary-boot-reg"
++#define MPIDR_CPUID_BITMASK 0x3
+
+/* I/O address of register used to coordinate secondary core startup */
-+static u32 secondary_boot;
-+
-+static DEFINE_SPINLOCK(boot_lock);
-+
-+/*
-+ * Write pen_release in a way that is guaranteed to be visible to all
-+ * observers, irrespective of whether they're taking part in coherency
-+ * or not. This is necessary for the hotplug code to work reliably.
-+ */
-+static void write_pen_release(int val)
-+{
-+ pen_release = val;
-+ /*
-+ * Ensure write to pen_release is visible to the other cores,
-+ * here - primary core
-+ */
-+ smp_wmb();
-+ sync_cache_w(&pen_release);
-+}
++static u32 secondary_boot_addr;
+
+/*
+ * Enable the Cortex A9 Snoop Control Unit
@@ -409,18 +351,18 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+ return 0;
+}
+
-+static int nsp_write_lut(void (*secondary_startup) (void))
++static int nsp_write_lut(void)
+{
+ void __iomem *sku_rom_lut;
+ phys_addr_t secondary_startup_phy;
+
-+ if (!secondary_boot) {
++ if (!secondary_boot_addr) {
+ pr_warn("required secondary boot register not specified\n");
+ return -EINVAL;
+ }
+
-+ sku_rom_lut = ioremap_nocache((phys_addr_t)secondary_boot,
-+ sizeof(secondary_boot));
++ sku_rom_lut = ioremap_nocache((phys_addr_t)secondary_boot_addr,
++ sizeof(secondary_boot_addr));
+ if (!sku_rom_lut) {
+ pr_warn("unable to ioremap SKU-ROM LUT register\n");
+ return -ENOMEM;
@@ -430,9 +372,8 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+ BUG_ON(secondary_startup_phy > (phys_addr_t)U32_MAX);
+
+ writel_relaxed(secondary_startup_phy, sku_rom_lut);
-+ /*
-+ * Ensure the write is visible to the secondary core.
-+ */
++
++ /* Ensure the write is visible to the secondary core */
+ smp_wmb();
+
+ iounmap(sku_rom_lut);
@@ -440,58 +381,69 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+ return 0;
+}
+
-+static void nsp_secondary_init(unsigned int cpu)
-+{
-+ /*
-+ * Let the primary cpu know we are out of holding pen.
-+ */
-+ write_pen_release(-1);
-+
-+ /*
-+ * Synchronise with the boot thread.
-+ */
-+ spin_lock(&boot_lock);
-+ spin_unlock(&boot_lock);
-+}
-+
+static void __init bcm_smp_prepare_cpus(unsigned int max_cpus)
+{
+ static cpumask_t only_cpu_0 = { CPU_BITS_CPU0 };
-+ struct device_node *node;
++ struct device_node *cpus_node = NULL;
++ struct device_node *cpu_node = NULL;
+ int ret;
+
-+ BUG_ON(secondary_boot); /* We're called only once */
-+
+ /*
+ * This function is only called via smp_ops->smp_prepare_cpu().
+ * That only happens if a "/cpus" device tree node exists
+ * and has an "enable-method" property that selects the SMP
+ * operations defined herein.
+ */
-+ node = of_find_node_by_path("/cpus");
-+ BUG_ON(!node);
-+
-+ /*
-+ * Our secondary enable method requires a "secondary-boot-reg"
-+ * property to specify a register address used to request the
-+ * ROM code boot a secondary core. If we have any trouble
-+ * getting this we fall back to uniprocessor mode.
-+ */
-+ if (of_property_read_u32(node, OF_SECONDARY_BOOT, &secondary_boot)) {
-+ pr_warn("%s: missing/invalid " OF_SECONDARY_BOOT " property\n",
-+ node->name);
-+ ret = -ENOENT; /* Arrange to disable SMP */
-+ goto out;
++ cpus_node = of_find_node_by_path("/cpus");
++ if (!cpus_node)
++ return;
++
++ for_each_child_of_node(cpus_node, cpu_node) {
++ u32 cpuid;
++
++ if (of_node_cmp(cpu_node->type, "cpu"))
++ continue;
++
++ if (of_property_read_u32(cpu_node, "reg", &cpuid)) {
++ pr_debug("%s: missing reg property\n",
++ cpu_node->full_name);
++ ret = -ENOENT;
++ goto out;
++ }
++
++ /*
++ * "secondary-boot-reg" property should be defined only
++ * for secondary cpu
++ */
++ if ((cpuid & MPIDR_CPUID_BITMASK) == 1) {
++ /*
++ * Our secondary enable method requires a
++ * "secondary-boot-reg" property to specify a register
++ * address used to request the ROM code boot a secondary
++ * core. If we have any trouble getting this we fall
++ * back to uniprocessor mode.
++ */
++ if (of_property_read_u32(cpu_node,
++ OF_SECONDARY_BOOT,
++ &secondary_boot_addr)) {
++ pr_warn("%s: no" OF_SECONDARY_BOOT "property\n",
++ cpu_node->name);
++ ret = -ENOENT;
++ goto out;
++ }
++ }
+ }
+
+ /*
-+ * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
++ * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
+ * returned, the SoC reported a uniprocessor configuration.
+ * We bail on any other error.
+ */
+ ret = scu_a9_enable();
+out:
-+ of_node_put(node);
++ of_node_put(cpu_node);
++ of_node_put(cpus_node);
++
+ if (ret) {
+ /* Update the CPU present map to reflect uniprocessor mode */
+ pr_warn("disabling SMP\n");
@@ -532,12 +484,13 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+ return -EINVAL;
+ }
+
-+ if (!secondary_boot) {
++ if (!secondary_boot_addr) {
+ pr_err("required secondary boot register not specified\n");
+ return -EINVAL;
+ }
+
-+ boot_reg = ioremap_nocache((phys_addr_t)secondary_boot, sizeof(u32));
++ boot_reg = ioremap_nocache(
++ (phys_addr_t)secondary_boot_addr, sizeof(u32));
+ if (!boot_reg) {
+ pr_err("unable to map boot register for cpu %u\n", cpu_id);
+ return -ENOMEM;
@@ -574,47 +527,20 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+
+static int nsp_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
-+ unsigned long timeout;
+ int ret;
+
+ /*
+ * After wake up, secondary core branches to the startup
+ * address programmed at SKU ROM LUT location.
+ */
-+ ret = nsp_write_lut(nsp_secondary_startup);
++ ret = nsp_write_lut();
+ if (ret) {
+ pr_err("unable to write startup addr to SKU ROM LUT\n");
+ goto out;
+ }
+
-+ /*
-+ * The secondary processor is waiting to be released from
-+ * the holding pen - release it, then wait for it to flag
-+ * that it has been released by resetting pen_release.
-+ */
-+ spin_lock(&boot_lock);
-+
-+ write_pen_release(cpu_logical_map(cpu));
-+ /*
-+ * Send an Event to wake up the secondary core which is in
-+ * WFE state. Updated pen_release should also be visible to
-+ * the secondary core.
-+ */
-+ dsb_sev();
-+
-+ timeout = jiffies + (1 * HZ);
-+ while (time_before(jiffies, timeout)) {
-+ /* Make sure loads on other CPU is visible */
-+ smp_rmb();
-+ if (pen_release == -1)
-+ break;
-+
-+ udelay(10);
-+ }
-+
-+ spin_unlock(&boot_lock);
-+
-+ ret = pen_release != -1 ? -ENXIO : 0;
++ /* Send a CPU wakeup interrupt to the secondary core */
++ arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+
+out:
+ return ret;
@@ -629,7 +555,6 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+
+struct smp_operations nsp_smp_ops __initdata = {
+ .smp_prepare_cpus = bcm_smp_prepare_cpus,
-+ .smp_secondary_init = nsp_secondary_init,
+ .smp_boot_secondary = nsp_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(bcm_smp_nsp, "brcm,bcm-nsp-smp", &nsp_smp_ops);
diff --git a/target/linux/bcm53xx/patches-4.1/131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch b/target/linux/bcm53xx/patches-4.1/134-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch
index a23aa5df36..5ff1c3526f 100644
--- a/target/linux/bcm53xx/patches-4.1/131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch
+++ b/target/linux/bcm53xx/patches-4.1/134-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch
@@ -1,30 +1,38 @@
-From ddbf0ad85be06948dd214c7beb7b315ef2749e65 Mon Sep 17 00:00:00 2001
+From 16e1bf7dde22ee22a331aabf824cc31a6794a4cb Mon Sep 17 00:00:00 2001
From: Jon Mason <jonmason@broadcom.com>
-Date: Thu, 15 Oct 2015 14:14:10 -0400
-Subject: [PATCH] ARM: BCM: Add SMP support for Broadcom 4708
-
-ARM: BCM: Add SMP support for Broadcom 4708
+Date: Thu, 15 Oct 2015 14:09:10 -0400
+Subject: [PATCH 134/134] ARM: BCM: Add SMP support for Broadcom 4708
Add SMP support for Broadcom's 4708 SoCs.
Signed-off-by: Jon Mason <jonmason@broadcom.com>
+Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
+Tested-by: Hauke Mehrtens <hauke@hauke-m.de>
+Signed-off-by: Kapil Hali <kapilh@broadcom.com>
---
arch/arm/boot/dts/bcm4708.dtsi | 2 ++
- arch/arm/mach-bcm/Kconfig | 2 ++
+ arch/arm/mach-bcm/Kconfig | 1 +
arch/arm/mach-bcm/Makefile | 3 +++
- 3 files changed, 7 insertions(+)
+ 3 files changed, 6 insertions(+)
--- a/arch/arm/boot/dts/bcm4708.dtsi
+++ b/arch/arm/boot/dts/bcm4708.dtsi
-@@ -15,6 +15,8 @@
+@@ -15,6 +15,7 @@
cpus {
#address-cells = <1>;
#size-cells = <0>;
+ enable-method = "brcm,bcm-nsp-smp";
-+ secondary-boot-reg = <0xffff0400>;
cpu@0 {
device_type = "cpu";
+@@ -27,6 +28,7 @@
+ device_type = "cpu";
+ compatible = "arm,cortex-a9";
+ next-level-cache = <&L2>;
++ secondary-boot-reg = <0xffff0400>;
+ reg = <0x1>;
+ };
+ };
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -41,6 +41,7 @@ config ARCH_BCM_5301X
@@ -42,7 +50,7 @@ Signed-off-by: Jon Mason <jonmason@broadcom.com>
# BCM5301X
obj-$(CONFIG_ARCH_BCM_5301X) += bcm_5301x.o
+ifeq ($(CONFIG_ARCH_BCM_5301X),y)
-+obj-$(CONFIG_SMP) += headsmp.o platsmp.o
++obj-$(CONFIG_SMP) += platsmp.o
+endif
# BCM63XXx
diff --git a/target/linux/bcm53xx/patches-4.3/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch b/target/linux/bcm53xx/patches-4.3/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch
new file mode 100644
index 0000000000..1de37b0132
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.3/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch
@@ -0,0 +1,69 @@
+From 204b9dbd7c4bd5a223fd104b9cba56c12fe04add Mon Sep 17 00:00:00 2001
+From: Kapil Hali <kapilh@broadcom.com>
+Date: Wed, 19 Aug 2015 13:42:23 -0400
+Subject: [PATCH 130/134] dt-bindings: add SMP enable-method for Broadcom NSP
+
+Add a compatible string "brcm,bcm-nsp-smp" for Broadcom's
+Northstar Plus CPU to the 32-bit ARM CPU device tree binding
+documentation file and create a new binding documentation for
+Northstar Plus CPU.
+
+Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+---
+ .../bindings/arm/bcm/brcm,nsp-cpu-method.txt | 39 ++++++++++++++++++++++
+ Documentation/devicetree/bindings/arm/cpus.txt | 1 +
+ 2 files changed, 40 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
+@@ -0,0 +1,39 @@
++Broadcom Northstar Plus SoC CPU Enable Method
++---------------------------------------------
++This binding defines the enable method used for starting secondary
++CPUs in the following Broadcom SoCs:
++ BCM58522, BCM58525, BCM58535, BCM58622, BCM58623, BCM58625, BCM88312
++
++The enable method is specified by defining the following required
++properties in the "cpus" device tree node:
++ - enable-method = "brcm,bcm-nsp-smp";
++ - secondary-boot-reg = <...>;
++
++The secondary-boot-reg property is a u32 value that specifies the
++physical address of the register which should hold the common
++entry point for a secondary CPU. This entry is cpu node specific
++and should be added per cpu. E.g., in case of NSP (BCM58625) which
++is a dual core CPU SoC, this entry should be added to cpu1 node.
++
++
++Example:
++ cpus {
++ #address-cells = <1>;
++ #size-cells = <0>;
++ enable-method = "brcm,bcm-nsp-smp";
++
++ cpu0: cpu@0 {
++ device_type = "cpu";
++ compatible = "arm,cortex-a9";
++ next-level-cache = <&L2>;
++ reg = <0>;
++ };
++
++ cpu1: cpu@1 {
++ device_type = "cpu";
++ compatible = "arm,cortex-a9";
++ next-level-cache = <&L2>;
++ reg = <1>;
++ secondary-boot-reg = <0xffff042c>;
++ };
++ };
+--- a/Documentation/devicetree/bindings/arm/cpus.txt
++++ b/Documentation/devicetree/bindings/arm/cpus.txt
+@@ -190,6 +190,7 @@ nodes to be present and contain the prop
+ "allwinner,sun6i-a31"
+ "allwinner,sun8i-a23"
+ "arm,psci"
++ "brcm,bcm-nsp-smp"
+ "brcm,brahma-b15"
+ "marvell,armada-375-smp"
+ "marvell,armada-380-smp"
diff --git a/target/linux/bcm53xx/patches-4.3/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch b/target/linux/bcm53xx/patches-4.3/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch
new file mode 100644
index 0000000000..7a48a13e64
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.3/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch
@@ -0,0 +1,206 @@
+From 8622d6da5d95293d474c156612fd819fdaf542ec Mon Sep 17 00:00:00 2001
+From: Kapil Hali <kapilh@broadcom.com>
+Date: Wed, 25 Nov 2015 08:58:53 -0500
+Subject: [PATCH 131/134] ARM: BCM: Clean up SMP support for Broadcom Kona
+
+These changes cleans up SMP implementaion for Broadcom's
+Kona SoC which are required for handling SMP for iProc
+family of SoCs at a single place for BCM NSP and BCM Kona.
+
+Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+---
+ arch/arm/boot/dts/bcm11351.dtsi | 2 +-
+ arch/arm/boot/dts/bcm21664.dtsi | 2 +-
+ arch/arm/mach-bcm/kona_smp.c | 82 +++++++++++++++++++++++++++--------------
+ 3 files changed, 56 insertions(+), 30 deletions(-)
+
+--- a/arch/arm/boot/dts/bcm11351.dtsi
++++ b/arch/arm/boot/dts/bcm11351.dtsi
+@@ -31,7 +31,6 @@
+ #address-cells = <1>;
+ #size-cells = <0>;
+ enable-method = "brcm,bcm11351-cpu-method";
+- secondary-boot-reg = <0x3500417c>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+@@ -42,6 +41,7 @@
+ cpu1: cpu@1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a9";
++ secondary-boot-reg = <0x3500417c>;
+ reg = <1>;
+ };
+ };
+--- a/arch/arm/boot/dts/bcm21664.dtsi
++++ b/arch/arm/boot/dts/bcm21664.dtsi
+@@ -31,7 +31,6 @@
+ #address-cells = <1>;
+ #size-cells = <0>;
+ enable-method = "brcm,bcm11351-cpu-method";
+- secondary-boot-reg = <0x35004178>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+@@ -42,6 +41,7 @@
+ cpu1: cpu@1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a9";
++ secondary-boot-reg = <0x35004178>;
+ reg = <1>;
+ };
+ };
+--- a/arch/arm/mach-bcm/kona_smp.c
++++ b/arch/arm/mach-bcm/kona_smp.c
+@@ -1,5 +1,5 @@
+ /*
+- * Copyright (C) 2014 Broadcom Corporation
++ * Copyright (C) 2014-2015 Broadcom Corporation
+ * Copyright 2014 Linaro Limited
+ *
+ * This program is free software; you can redistribute it and/or
+@@ -30,9 +30,10 @@
+
+ /* Name of device node property defining secondary boot register location */
+ #define OF_SECONDARY_BOOT "secondary-boot-reg"
++#define MPIDR_CPUID_BITMASK 0x3
+
+ /* I/O address of register used to coordinate secondary core startup */
+-static u32 secondary_boot;
++static u32 secondary_boot_addr;
+
+ /*
+ * Enable the Cortex A9 Snoop Control Unit
+@@ -78,44 +79,68 @@ static int __init scu_a9_enable(void)
+ static void __init bcm_smp_prepare_cpus(unsigned int max_cpus)
+ {
+ static cpumask_t only_cpu_0 = { CPU_BITS_CPU0 };
+- struct device_node *node;
++ struct device_node *cpus_node = NULL;
++ struct device_node *cpu_node = NULL;
+ int ret;
+
+- BUG_ON(secondary_boot); /* We're called only once */
+-
+ /*
+ * This function is only called via smp_ops->smp_prepare_cpu().
+ * That only happens if a "/cpus" device tree node exists
+ * and has an "enable-method" property that selects the SMP
+ * operations defined herein.
+ */
+- node = of_find_node_by_path("/cpus");
+- BUG_ON(!node);
+-
+- /*
+- * Our secondary enable method requires a "secondary-boot-reg"
+- * property to specify a register address used to request the
+- * ROM code boot a secondary code. If we have any trouble
+- * getting this we fall back to uniprocessor mode.
+- */
+- if (of_property_read_u32(node, OF_SECONDARY_BOOT, &secondary_boot)) {
+- pr_err("%s: missing/invalid " OF_SECONDARY_BOOT " property\n",
+- node->name);
+- ret = -ENOENT; /* Arrange to disable SMP */
+- goto out;
++ cpus_node = of_find_node_by_path("/cpus");
++ if (!cpus_node)
++ return;
++
++ for_each_child_of_node(cpus_node, cpu_node) {
++ u32 cpuid;
++
++ if (of_node_cmp(cpu_node->type, "cpu"))
++ continue;
++
++ if (of_property_read_u32(cpu_node, "reg", &cpuid)) {
++ pr_debug("%s: missing reg property\n",
++ cpu_node->full_name);
++ ret = -ENOENT;
++ goto out;
++ }
++
++ /*
++ * "secondary-boot-reg" property should be defined only
++ * for secondary cpu
++ */
++ if ((cpuid & MPIDR_CPUID_BITMASK) == 1) {
++ /*
++ * Our secondary enable method requires a
++ * "secondary-boot-reg" property to specify a register
++ * address used to request the ROM code boot a secondary
++ * core. If we have any trouble getting this we fall
++ * back to uniprocessor mode.
++ */
++ if (of_property_read_u32(cpu_node,
++ OF_SECONDARY_BOOT,
++ &secondary_boot_addr)) {
++ pr_warn("%s: no" OF_SECONDARY_BOOT "property\n",
++ cpu_node->name);
++ ret = -ENOENT;
++ goto out;
++ }
++ }
+ }
+
+ /*
+- * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
++ * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
+ * returned, the SoC reported a uniprocessor configuration.
+ * We bail on any other error.
+ */
+ ret = scu_a9_enable();
+ out:
+- of_node_put(node);
++ of_node_put(cpu_node);
++ of_node_put(cpus_node);
++
+ if (ret) {
+ /* Update the CPU present map to reflect uniprocessor mode */
+- BUG_ON(ret != -ENOENT);
+ pr_warn("disabling SMP\n");
+ init_cpu_present(&only_cpu_0);
+ }
+@@ -139,7 +164,7 @@ out:
+ * - Wait for the secondary boot register to be re-written, which
+ * indicates the secondary core has started.
+ */
+-static int bcm_boot_secondary(unsigned int cpu, struct task_struct *idle)
++static int kona_boot_secondary(unsigned int cpu, struct task_struct *idle)
+ {
+ void __iomem *boot_reg;
+ phys_addr_t boot_func;
+@@ -154,15 +179,16 @@ static int bcm_boot_secondary(unsigned i
+ return -EINVAL;
+ }
+
+- if (!secondary_boot) {
++ if (!secondary_boot_addr) {
+ pr_err("required secondary boot register not specified\n");
+ return -EINVAL;
+ }
+
+- boot_reg = ioremap_nocache((phys_addr_t)secondary_boot, sizeof(u32));
++ boot_reg = ioremap_nocache(
++ (phys_addr_t)secondary_boot_addr, sizeof(u32));
+ if (!boot_reg) {
+ pr_err("unable to map boot register for cpu %u\n", cpu_id);
+- return -ENOSYS;
++ return -ENOMEM;
+ }
+
+ /*
+@@ -191,12 +217,12 @@ static int bcm_boot_secondary(unsigned i
+
+ pr_err("timeout waiting for cpu %u to start\n", cpu_id);
+
+- return -ENOSYS;
++ return -ENXIO;
+ }
+
+ static struct smp_operations bcm_smp_ops __initdata = {
+ .smp_prepare_cpus = bcm_smp_prepare_cpus,
+- .smp_boot_secondary = bcm_boot_secondary,
++ .smp_boot_secondary = kona_boot_secondary,
+ };
+ CPU_METHOD_OF_DECLARE(bcm_smp_bcm281xx, "brcm,bcm11351-cpu-method",
+ &bcm_smp_ops);
diff --git a/target/linux/bcm53xx/patches-4.3/130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch b/target/linux/bcm53xx/patches-4.3/133-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch
index 5e3bd7793d..14a1da1eb5 100644
--- a/target/linux/bcm53xx/patches-4.3/130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch
+++ b/target/linux/bcm53xx/patches-4.3/133-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch
@@ -1,12 +1,12 @@
-From a0ad1511d5805b95ac4c454d7904c670a1696055 Mon Sep 17 00:00:00 2001
+From e99fb6d01cddf38cffc11655aba4a96a981d604e Mon Sep 17 00:00:00 2001
From: Kapil Hali <kapilh@broadcom.com>
-Date: Wed, 14 Oct 2015 13:47:00 -0400
-Subject: [PATCH] ARM: BCM: Add SMP support for Broadcom NSP
+Date: Wed, 25 Nov 2015 13:25:55 -0500
+Subject: [PATCH 133/134] ARM: BCM: Add SMP support for Broadcom NSP
-Add SMP support for Broadcom's Northstar Plus SoC,
-cpu enable method and pen_release procedures. This
-changes also consolidates iProc family's - BCM NSP
-and BCM Kona, SMP handling in a common file.
+Add SMP support for Broadcom's Northstar Plus SoC
+cpu enable method. This changes also consolidates
+iProc family's - BCM NSP and BCM Kona, platform
+SMP handling in a common file.
Northstar Plus SoC is based on ARM Cortex-A9
revision r3p0 which requires configuration for ARM
@@ -15,14 +15,11 @@ configuration option.
Signed-off-by: Kapil Hali <kapilh@broadcom.com>
---
- arch/arm/mach-bcm/Makefile | 2 +-
- arch/arm/mach-bcm/bcm_nsp.h | 19 +++
- arch/arm/mach-bcm/headsmp.S | 37 +++++
- arch/arm/mach-bcm/kona_smp.c | 202 ---------------------------
- arch/arm/mach-bcm/platsmp.c | 326 +++++++++++++++++++++++++++++++++++++++++++
- 5 files changed, 383 insertions(+), 203 deletions(-)
- create mode 100644 arch/arm/mach-bcm/bcm_nsp.h
- create mode 100644 arch/arm/mach-bcm/headsmp.S
+ arch/arm/mach-bcm/Kconfig | 2 +
+ arch/arm/mach-bcm/Makefile | 8 +-
+ arch/arm/mach-bcm/kona_smp.c | 228 ----------------------------------
+ arch/arm/mach-bcm/platsmp.c | 290 +++++++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 298 insertions(+), 230 deletions(-)
delete mode 100644 arch/arm/mach-bcm/kona_smp.c
create mode 100644 arch/arm/mach-bcm/platsmp.c
@@ -37,73 +34,11 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
# BCM281XX and BCM21664 L2 cache control
obj-$(CONFIG_ARCH_BCM_MOBILE_L2_CACHE) += kona_l2_cache.o
---- /dev/null
-+++ b/arch/arm/mach-bcm/bcm_nsp.h
-@@ -0,0 +1,19 @@
-+/*
-+ * Copyright (C) 2015 Broadcom Corporation
-+ *
-+ * 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 version 2.
-+ *
-+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
-+ * kind, whether express or implied; without even the implied warranty
-+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#ifndef __BCM_NSP_H
-+#define __BCM_NSP_H
-+
-+extern void nsp_secondary_startup(void);
-+
-+#endif /* __BCM_NSP_H */
---- /dev/null
-+++ b/arch/arm/mach-bcm/headsmp.S
-@@ -0,0 +1,37 @@
-+/*
-+ * Copyright (C) 2015 Broadcom Corporation
-+ *
-+ * 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 version 2.
-+ *
-+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
-+ * kind, whether express or implied; without even the implied warranty
-+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#include <linux/linkage.h>
-+
-+/*
-+ * iProc specific entry point for secondary CPUs. This provides
-+ * a "holding pen" into which all secondary cores are held until
-+ * we are ready for them to initialise.
-+ */
-+ENTRY(nsp_secondary_startup)
-+ mrc p15, 0, r0, c0, c0, 5
-+ and r0, r0, #15
-+ adr r4, 1f
-+ ldmia r4, {r5, r6}
-+ sub r4, r4, r5
-+ add r6, r6, r4
-+pen: ldr r7, [r6]
-+ cmp r7, r0
-+ bne pen
-+
-+ b secondary_startup
-+
-+1: .long .
-+ .long pen_release
-+
-+ENDPROC(nsp_secondary_startup)
--- a/arch/arm/mach-bcm/kona_smp.c
+++ /dev/null
-@@ -1,202 +0,0 @@
+@@ -1,228 +0,0 @@
-/*
-- * Copyright (C) 2014 Broadcom Corporation
+- * Copyright (C) 2014-2015 Broadcom Corporation
- * Copyright 2014 Linaro Limited
- *
- * This program is free software; you can redistribute it and/or
@@ -134,9 +69,10 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
-
-/* Name of device node property defining secondary boot register location */
-#define OF_SECONDARY_BOOT "secondary-boot-reg"
+-#define MPIDR_CPUID_BITMASK 0x3
-
-/* I/O address of register used to coordinate secondary core startup */
--static u32 secondary_boot;
+-static u32 secondary_boot_addr;
-
-/*
- * Enable the Cortex A9 Snoop Control Unit
@@ -182,44 +118,68 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
-static void __init bcm_smp_prepare_cpus(unsigned int max_cpus)
-{
- static cpumask_t only_cpu_0 = { CPU_BITS_CPU0 };
-- struct device_node *node;
+- struct device_node *cpus_node = NULL;
+- struct device_node *cpu_node = NULL;
- int ret;
-
-- BUG_ON(secondary_boot); /* We're called only once */
--
- /*
- * This function is only called via smp_ops->smp_prepare_cpu().
- * That only happens if a "/cpus" device tree node exists
- * and has an "enable-method" property that selects the SMP
- * operations defined herein.
- */
-- node = of_find_node_by_path("/cpus");
-- BUG_ON(!node);
+- cpus_node = of_find_node_by_path("/cpus");
+- if (!cpus_node)
+- return;
-
-- /*
-- * Our secondary enable method requires a "secondary-boot-reg"
-- * property to specify a register address used to request the
-- * ROM code boot a secondary code. If we have any trouble
-- * getting this we fall back to uniprocessor mode.
-- */
-- if (of_property_read_u32(node, OF_SECONDARY_BOOT, &secondary_boot)) {
-- pr_err("%s: missing/invalid " OF_SECONDARY_BOOT " property\n",
-- node->name);
-- ret = -ENOENT; /* Arrange to disable SMP */
-- goto out;
+- for_each_child_of_node(cpus_node, cpu_node) {
+- u32 cpuid;
+-
+- if (of_node_cmp(cpu_node->type, "cpu"))
+- continue;
+-
+- if (of_property_read_u32(cpu_node, "reg", &cpuid)) {
+- pr_debug("%s: missing reg property\n",
+- cpu_node->full_name);
+- ret = -ENOENT;
+- goto out;
+- }
+-
+- /*
+- * "secondary-boot-reg" property should be defined only
+- * for secondary cpu
+- */
+- if ((cpuid & MPIDR_CPUID_BITMASK) == 1) {
+- /*
+- * Our secondary enable method requires a
+- * "secondary-boot-reg" property to specify a register
+- * address used to request the ROM code boot a secondary
+- * core. If we have any trouble getting this we fall
+- * back to uniprocessor mode.
+- */
+- if (of_property_read_u32(cpu_node,
+- OF_SECONDARY_BOOT,
+- &secondary_boot_addr)) {
+- pr_warn("%s: no" OF_SECONDARY_BOOT "property\n",
+- cpu_node->name);
+- ret = -ENOENT;
+- goto out;
+- }
+- }
- }
-
- /*
-- * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
+- * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
- * returned, the SoC reported a uniprocessor configuration.
- * We bail on any other error.
- */
- ret = scu_a9_enable();
-out:
-- of_node_put(node);
+- of_node_put(cpu_node);
+- of_node_put(cpus_node);
+-
- if (ret) {
- /* Update the CPU present map to reflect uniprocessor mode */
-- BUG_ON(ret != -ENOENT);
- pr_warn("disabling SMP\n");
- init_cpu_present(&only_cpu_0);
- }
@@ -243,7 +203,7 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
- * - Wait for the secondary boot register to be re-written, which
- * indicates the secondary core has started.
- */
--static int bcm_boot_secondary(unsigned int cpu, struct task_struct *idle)
+-static int kona_boot_secondary(unsigned int cpu, struct task_struct *idle)
-{
- void __iomem *boot_reg;
- phys_addr_t boot_func;
@@ -258,15 +218,16 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
- return -EINVAL;
- }
-
-- if (!secondary_boot) {
+- if (!secondary_boot_addr) {
- pr_err("required secondary boot register not specified\n");
- return -EINVAL;
- }
-
-- boot_reg = ioremap_nocache((phys_addr_t)secondary_boot, sizeof(u32));
+- boot_reg = ioremap_nocache(
+- (phys_addr_t)secondary_boot_addr, sizeof(u32));
- if (!boot_reg) {
- pr_err("unable to map boot register for cpu %u\n", cpu_id);
-- return -ENOSYS;
+- return -ENOMEM;
- }
-
- /*
@@ -295,18 +256,18 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
-
- pr_err("timeout waiting for cpu %u to start\n", cpu_id);
-
-- return -ENOSYS;
+- return -ENXIO;
-}
-
-static struct smp_operations bcm_smp_ops __initdata = {
- .smp_prepare_cpus = bcm_smp_prepare_cpus,
-- .smp_boot_secondary = bcm_boot_secondary,
+- .smp_boot_secondary = kona_boot_secondary,
-};
-CPU_METHOD_OF_DECLARE(bcm_smp_bcm281xx, "brcm,bcm11351-cpu-method",
- &bcm_smp_ops);
--- /dev/null
+++ b/arch/arm/mach-bcm/platsmp.c
-@@ -0,0 +1,326 @@
+@@ -0,0 +1,290 @@
+/*
+ * Copyright (C) 2014-2015 Broadcom Corporation
+ * Copyright 2014 Linaro Limited
@@ -336,8 +297,6 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
-+#include "bcm_nsp.h"
-+
+/* Size of mapped Cortex A9 SCU address space */
+#define CORTEX_A9_SCU_SIZE 0x58
+
@@ -346,27 +305,10 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+
+/* Name of device node property defining secondary boot register location */
+#define OF_SECONDARY_BOOT "secondary-boot-reg"
++#define MPIDR_CPUID_BITMASK 0x3
+
+/* I/O address of register used to coordinate secondary core startup */
-+static u32 secondary_boot;
-+
-+static DEFINE_SPINLOCK(boot_lock);
-+
-+/*
-+ * Write pen_release in a way that is guaranteed to be visible to all
-+ * observers, irrespective of whether they're taking part in coherency
-+ * or not. This is necessary for the hotplug code to work reliably.
-+ */
-+static void write_pen_release(int val)
-+{
-+ pen_release = val;
-+ /*
-+ * Ensure write to pen_release is visible to the other cores,
-+ * here - primary core
-+ */
-+ smp_wmb();
-+ sync_cache_w(&pen_release);
-+}
++static u32 secondary_boot_addr;
+
+/*
+ * Enable the Cortex A9 Snoop Control Unit
@@ -409,18 +351,18 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+ return 0;
+}
+
-+static int nsp_write_lut(void (*secondary_startup) (void))
++static int nsp_write_lut(void)
+{
+ void __iomem *sku_rom_lut;
+ phys_addr_t secondary_startup_phy;
+
-+ if (!secondary_boot) {
++ if (!secondary_boot_addr) {
+ pr_warn("required secondary boot register not specified\n");
+ return -EINVAL;
+ }
+
-+ sku_rom_lut = ioremap_nocache((phys_addr_t)secondary_boot,
-+ sizeof(secondary_boot));
++ sku_rom_lut = ioremap_nocache((phys_addr_t)secondary_boot_addr,
++ sizeof(secondary_boot_addr));
+ if (!sku_rom_lut) {
+ pr_warn("unable to ioremap SKU-ROM LUT register\n");
+ return -ENOMEM;
@@ -430,9 +372,8 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+ BUG_ON(secondary_startup_phy > (phys_addr_t)U32_MAX);
+
+ writel_relaxed(secondary_startup_phy, sku_rom_lut);
-+ /*
-+ * Ensure the write is visible to the secondary core.
-+ */
++
++ /* Ensure the write is visible to the secondary core */
+ smp_wmb();
+
+ iounmap(sku_rom_lut);
@@ -440,58 +381,69 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+ return 0;
+}
+
-+static void nsp_secondary_init(unsigned int cpu)
-+{
-+ /*
-+ * Let the primary cpu know we are out of holding pen.
-+ */
-+ write_pen_release(-1);
-+
-+ /*
-+ * Synchronise with the boot thread.
-+ */
-+ spin_lock(&boot_lock);
-+ spin_unlock(&boot_lock);
-+}
-+
+static void __init bcm_smp_prepare_cpus(unsigned int max_cpus)
+{
+ static cpumask_t only_cpu_0 = { CPU_BITS_CPU0 };
-+ struct device_node *node;
++ struct device_node *cpus_node = NULL;
++ struct device_node *cpu_node = NULL;
+ int ret;
+
-+ BUG_ON(secondary_boot); /* We're called only once */
-+
+ /*
+ * This function is only called via smp_ops->smp_prepare_cpu().
+ * That only happens if a "/cpus" device tree node exists
+ * and has an "enable-method" property that selects the SMP
+ * operations defined herein.
+ */
-+ node = of_find_node_by_path("/cpus");
-+ BUG_ON(!node);
-+
-+ /*
-+ * Our secondary enable method requires a "secondary-boot-reg"
-+ * property to specify a register address used to request the
-+ * ROM code boot a secondary core. If we have any trouble
-+ * getting this we fall back to uniprocessor mode.
-+ */
-+ if (of_property_read_u32(node, OF_SECONDARY_BOOT, &secondary_boot)) {
-+ pr_warn("%s: missing/invalid " OF_SECONDARY_BOOT " property\n",
-+ node->name);
-+ ret = -ENOENT; /* Arrange to disable SMP */
-+ goto out;
++ cpus_node = of_find_node_by_path("/cpus");
++ if (!cpus_node)
++ return;
++
++ for_each_child_of_node(cpus_node, cpu_node) {
++ u32 cpuid;
++
++ if (of_node_cmp(cpu_node->type, "cpu"))
++ continue;
++
++ if (of_property_read_u32(cpu_node, "reg", &cpuid)) {
++ pr_debug("%s: missing reg property\n",
++ cpu_node->full_name);
++ ret = -ENOENT;
++ goto out;
++ }
++
++ /*
++ * "secondary-boot-reg" property should be defined only
++ * for secondary cpu
++ */
++ if ((cpuid & MPIDR_CPUID_BITMASK) == 1) {
++ /*
++ * Our secondary enable method requires a
++ * "secondary-boot-reg" property to specify a register
++ * address used to request the ROM code boot a secondary
++ * core. If we have any trouble getting this we fall
++ * back to uniprocessor mode.
++ */
++ if (of_property_read_u32(cpu_node,
++ OF_SECONDARY_BOOT,
++ &secondary_boot_addr)) {
++ pr_warn("%s: no" OF_SECONDARY_BOOT "property\n",
++ cpu_node->name);
++ ret = -ENOENT;
++ goto out;
++ }
++ }
+ }
+
+ /*
-+ * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
++ * Enable the SCU on Cortex A9 based SoCs. If -ENOENT is
+ * returned, the SoC reported a uniprocessor configuration.
+ * We bail on any other error.
+ */
+ ret = scu_a9_enable();
+out:
-+ of_node_put(node);
++ of_node_put(cpu_node);
++ of_node_put(cpus_node);
++
+ if (ret) {
+ /* Update the CPU present map to reflect uniprocessor mode */
+ pr_warn("disabling SMP\n");
@@ -532,12 +484,13 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+ return -EINVAL;
+ }
+
-+ if (!secondary_boot) {
++ if (!secondary_boot_addr) {
+ pr_err("required secondary boot register not specified\n");
+ return -EINVAL;
+ }
+
-+ boot_reg = ioremap_nocache((phys_addr_t)secondary_boot, sizeof(u32));
++ boot_reg = ioremap_nocache(
++ (phys_addr_t)secondary_boot_addr, sizeof(u32));
+ if (!boot_reg) {
+ pr_err("unable to map boot register for cpu %u\n", cpu_id);
+ return -ENOMEM;
@@ -574,47 +527,20 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+
+static int nsp_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
-+ unsigned long timeout;
+ int ret;
+
+ /*
+ * After wake up, secondary core branches to the startup
+ * address programmed at SKU ROM LUT location.
+ */
-+ ret = nsp_write_lut(nsp_secondary_startup);
++ ret = nsp_write_lut();
+ if (ret) {
+ pr_err("unable to write startup addr to SKU ROM LUT\n");
+ goto out;
+ }
+
-+ /*
-+ * The secondary processor is waiting to be released from
-+ * the holding pen - release it, then wait for it to flag
-+ * that it has been released by resetting pen_release.
-+ */
-+ spin_lock(&boot_lock);
-+
-+ write_pen_release(cpu_logical_map(cpu));
-+ /*
-+ * Send an Event to wake up the secondary core which is in
-+ * WFE state. Updated pen_release should also be visible to
-+ * the secondary core.
-+ */
-+ dsb_sev();
-+
-+ timeout = jiffies + (1 * HZ);
-+ while (time_before(jiffies, timeout)) {
-+ /* Make sure loads on other CPU is visible */
-+ smp_rmb();
-+ if (pen_release == -1)
-+ break;
-+
-+ udelay(10);
-+ }
-+
-+ spin_unlock(&boot_lock);
-+
-+ ret = pen_release != -1 ? -ENXIO : 0;
++ /* Send a CPU wakeup interrupt to the secondary core */
++ arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+
+out:
+ return ret;
@@ -629,7 +555,6 @@ Signed-off-by: Kapil Hali <kapilh@broadcom.com>
+
+struct smp_operations nsp_smp_ops __initdata = {
+ .smp_prepare_cpus = bcm_smp_prepare_cpus,
-+ .smp_secondary_init = nsp_secondary_init,
+ .smp_boot_secondary = nsp_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(bcm_smp_nsp, "brcm,bcm-nsp-smp", &nsp_smp_ops);
diff --git a/target/linux/bcm53xx/patches-4.3/131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch b/target/linux/bcm53xx/patches-4.3/134-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch
index ec07be5277..9260190a34 100644
--- a/target/linux/bcm53xx/patches-4.3/131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch
+++ b/target/linux/bcm53xx/patches-4.3/134-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch
@@ -1,30 +1,38 @@
-From ddbf0ad85be06948dd214c7beb7b315ef2749e65 Mon Sep 17 00:00:00 2001
+From 16e1bf7dde22ee22a331aabf824cc31a6794a4cb Mon Sep 17 00:00:00 2001
From: Jon Mason <jonmason@broadcom.com>
-Date: Thu, 15 Oct 2015 14:14:10 -0400
-Subject: [PATCH] ARM: BCM: Add SMP support for Broadcom 4708
-
-ARM: BCM: Add SMP support for Broadcom 4708
+Date: Thu, 15 Oct 2015 14:09:10 -0400
+Subject: [PATCH 134/134] ARM: BCM: Add SMP support for Broadcom 4708
Add SMP support for Broadcom's 4708 SoCs.
Signed-off-by: Jon Mason <jonmason@broadcom.com>
+Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
+Tested-by: Hauke Mehrtens <hauke@hauke-m.de>
+Signed-off-by: Kapil Hali <kapilh@broadcom.com>
---
arch/arm/boot/dts/bcm4708.dtsi | 2 ++
- arch/arm/mach-bcm/Kconfig | 2 ++
+ arch/arm/mach-bcm/Kconfig | 1 +
arch/arm/mach-bcm/Makefile | 3 +++
- 3 files changed, 7 insertions(+)
+ 3 files changed, 6 insertions(+)
--- a/arch/arm/boot/dts/bcm4708.dtsi
+++ b/arch/arm/boot/dts/bcm4708.dtsi
-@@ -15,6 +15,8 @@
+@@ -15,6 +15,7 @@
cpus {
#address-cells = <1>;
#size-cells = <0>;
+ enable-method = "brcm,bcm-nsp-smp";
-+ secondary-boot-reg = <0xffff0400>;
cpu@0 {
device_type = "cpu";
+@@ -27,6 +28,7 @@
+ device_type = "cpu";
+ compatible = "arm,cortex-a9";
+ next-level-cache = <&L2>;
++ secondary-boot-reg = <0xffff0400>;
+ reg = <0x1>;
+ };
+ };
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -41,6 +41,7 @@ config ARCH_BCM_5301X
@@ -42,7 +50,7 @@ Signed-off-by: Jon Mason <jonmason@broadcom.com>
# BCM5301X
obj-$(CONFIG_ARCH_BCM_5301X) += bcm_5301x.o
+ifeq ($(CONFIG_ARCH_BCM_5301X),y)
-+obj-$(CONFIG_SMP) += headsmp.o platsmp.o
++obj-$(CONFIG_SMP) += platsmp.o
+endif
# BCM63XXx