From 0e73da37d5b0edd7918dd3f9ee025a2167d0f788 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Wed, 2 Dec 2015 15:23:08 +0000 Subject: [PATCH] bcm53xx: update SMP patches Broadcom submitted new SMP patches for this SoC to upstream Linux, add them to OpenWrt. Signed-off-by: Hauke Mehrtens SVN-Revision: 47687 --- ...d-SMP-enable-method-for-Broadcom-NSP.patch | 69 ++++ ...ean-up-SMP-support-for-Broadcom-Kona.patch | 206 +++++++++++ ...CM-Add-SMP-support-for-Broadcom-NSP.patch} | 325 +++++++----------- ...M-Add-SMP-support-for-Broadcom-4708.patch} | 28 +- ...d-SMP-enable-method-for-Broadcom-NSP.patch | 69 ++++ ...ean-up-SMP-support-for-Broadcom-Kona.patch | 206 +++++++++++ ...CM-Add-SMP-support-for-Broadcom-NSP.patch} | 325 +++++++----------- ...M-Add-SMP-support-for-Broadcom-4708.patch} | 28 +- 8 files changed, 836 insertions(+), 420 deletions(-) create mode 100644 target/linux/bcm53xx/patches-4.1/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch create mode 100644 target/linux/bcm53xx/patches-4.1/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch rename target/linux/bcm53xx/patches-4.1/{130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch => 133-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch} (66%) rename target/linux/bcm53xx/patches-4.1/{131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch => 134-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch} (62%) create mode 100644 target/linux/bcm53xx/patches-4.3/130-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch create mode 100644 target/linux/bcm53xx/patches-4.3/131-ARM-BCM-Clean-up-SMP-support-for-Broadcom-Kona.patch rename target/linux/bcm53xx/patches-4.3/{130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch => 133-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch} (66%) rename target/linux/bcm53xx/patches-4.3/{131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch => 134-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch} (62%) 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 +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 +--- + .../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 +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 +--- + 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 similarity index 66% rename from target/linux/bcm53xx/patches-4.1/130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch rename to 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 -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 --- - 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 # 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 -+ -+/* -+ * 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 - -/* 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 -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 - * - 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 - 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 - - 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 +#include +#include + -+#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 + +/* 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 + 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 + 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 + 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 + 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 + +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 + +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 similarity index 62% rename from target/linux/bcm53xx/patches-4.1/131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch rename to 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 -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 +Acked-by: Hauke Mehrtens +Tested-by: Hauke Mehrtens +Signed-off-by: Kapil Hali --- 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 # 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 +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 +--- + .../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 +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 +--- + 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 similarity index 66% rename from target/linux/bcm53xx/patches-4.3/130-ARM-BCM-Add-SMP-support-for-Broadcom-NSP.patch rename to 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 -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 --- - 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 # 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 -+ -+/* -+ * 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 - -/* 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 -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 - * - 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 - 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 - - 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 +#include +#include + -+#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 + +/* 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 + 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 + 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 + 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 + 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 + +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 + +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 similarity index 62% rename from target/linux/bcm53xx/patches-4.3/131-ARM-BCM-Add-SMP-support-for-Broadcom-4708.patch rename to 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 -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 +Acked-by: Hauke Mehrtens +Tested-by: Hauke Mehrtens +Signed-off-by: Kapil Hali --- 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 # 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 -- 2.30.2