ARM: consolidate SMP cross call implementation

Rather than having each platform class provide a mach/smp.h header for
smp_cross_call(), arrange for them to register the function with the
core ARM SMP code instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/smp.h

@@ -14,8 +14,6 @@
 #include <linux/cpumask.h>
 #include <linux/thread_info.h>
 
-#include <mach/smp.h>
-
 #ifndef CONFIG_SMP
 # error "<asm/smp.h> included in non-SMP build"
 #endif
@@ -47,9 +45,9 @@ extern void smp_init_cpus(void);
 
 
 /*
- * Raise an IPI cross call on CPUs in callmap.
+ * Provide a function to raise an IPI cross call on CPUs in callmap.
  */
-extern void smp_cross_call(const struct cpumask *mask, int ipi);
+extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
 
 /*
  * Boot a secondary CPU, and assign it the specified idle task.

arch/arm/kernel/smp.c

@@ -376,6 +376,13 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 	}
 }
 
+static void (*smp_cross_call)(const struct cpumask *, unsigned int);
+
+void __init set_smp_cross_call(void (*fn)(const struct cpumask *, unsigned int))
+{
+	smp_cross_call = fn;
+}
+
 void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 {
 	smp_cross_call(mask, IPI_CALL_FUNC);

arch/arm/mach-exynos4/include/mach/smp.h

@@ -1,19 +0,0 @@
-/* linux/arch/arm/mach-exynos4/include/mach/smp.h
- *
- * Cloned from arch/arm/mach-realview/include/mach/smp.h
-*/
-
-#ifndef ASM_ARCH_SMP_H
-#define ASM_ARCH_SMP_H __FILE__
-
-#include <asm/hardware/gic.h>
-
-/*
- * We use IRQ1 as the IPI
- */
-static inline void smp_cross_call(const struct cpumask *mask, int ipi)
-{
-	gic_raise_softirq(mask, ipi);
-}
-
-#endif

arch/arm/mach-exynos4/platsmp.c

@@ -22,6 +22,7 @@
 #include <linux/io.h>
 
 #include <asm/cacheflush.h>
+#include <asm/hardware/gic.h>
 #include <asm/smp_scu.h>
 #include <asm/unified.h>
 
@@ -104,7 +105,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
 	 * the boot monitor to read the system wide flags register,
 	 * and branch to the address found there.
 	 */
-	smp_cross_call(cpumask_of(cpu), 1);
+	gic_raise_softirq(cpumask_of(cpu), 1);
 
 	timeout = jiffies + (1 * HZ);
 	while (time_before(jiffies, timeout)) {
@@ -147,6 +148,8 @@ void __init smp_init_cpus(void)
 
 	for (i = 0; i < ncores; i++)
 		set_cpu_possible(i, true);
+
+	set_smp_cross_call(gic_raise_softirq);
 }
 
 void __init platform_smp_prepare_cpus(unsigned int max_cpus)

arch/arm/mach-msm/include/mach/smp.h

@@ -1,23 +0,0 @@
-/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#ifndef __ASM_ARCH_MSM_SMP_H
-#define __ASM_ARCH_MSM_SMP_H
-
-#include <asm/hardware/gic.h>
-
-static inline void smp_cross_call(const struct cpumask *mask, int ipi)
-{
-	gic_raise_softirq(mask, ipi);
-}
-
-#endif

arch/arm/mach-msm/platsmp.c

@@ -119,7 +119,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
 	 * the boot monitor to read the system wide flags register,
 	 * and branch to the address found there.
 	 */
-	smp_cross_call(cpumask_of(cpu), 1);
+	gic_raise_softirq(cpumask_of(cpu), 1);
 
 	timeout = jiffies + (1 * HZ);
 	while (time_before(jiffies, timeout)) {
@@ -151,6 +151,8 @@ void __init smp_init_cpus(void)
 
 	for (i = 0; i < NR_CPUS; i++)
 		set_cpu_possible(i, true);
+
+        set_smp_cross_call(gic_raise_softirq);
 }
 
 void __init platform_smp_prepare_cpus(unsigned int max_cpus)

arch/arm/mach-omap2/omap-smp.c

@@ -21,6 +21,7 @@
 #include <linux/io.h>
 
 #include <asm/cacheflush.h>
+#include <asm/hardware/gic.h>
 #include <asm/smp_scu.h>
 #include <mach/hardware.h>
 #include <mach/omap4-common.h>
@@ -63,7 +64,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
 	omap_modify_auxcoreboot0(0x200, 0xfffffdff);
 	flush_cache_all();
 	smp_wmb();
-	smp_cross_call(cpumask_of(cpu), 1);
+	gic_raise_softirq(cpumask_of(cpu), 1);
 
 	/*
 	 * Now the secondary core is starting up let it run its
@@ -118,6 +119,8 @@ void __init smp_init_cpus(void)
 
 	for (i = 0; i < ncores; i++)
 		set_cpu_possible(i, true);
+
+	set_smp_cross_call(gic_raise_softirq);
 }
 
 void __init platform_smp_prepare_cpus(unsigned int max_cpus)

arch/arm/mach-realview/include/mach/smp.h

@@ -1,14 +0,0 @@
-#ifndef ASMARM_ARCH_SMP_H
-#define ASMARM_ARCH_SMP_H
-
-#include <asm/hardware/gic.h>
-
-/*
- * We use IRQ1 as the IPI
- */
-static inline void smp_cross_call(const struct cpumask *mask, int ipi)
-{
-	gic_raise_softirq(mask, ipi);
-}
-
-#endif

arch/arm/mach-realview/platsmp.c

@@ -14,6 +14,7 @@
 #include <linux/io.h>
 
 #include <mach/hardware.h>
+#include <asm/hardware/gic.h>
 #include <asm/mach-types.h>
 #include <asm/smp_scu.h>
 #include <asm/unified.h>
@@ -61,6 +62,8 @@ void __init smp_init_cpus(void)
 
 	for (i = 0; i < ncores; i++)
 		set_cpu_possible(i, true);
+
+	set_smp_cross_call(gic_raise_softirq);
 }
 
 void __init platform_smp_prepare_cpus(unsigned int max_cpus)

arch/arm/mach-shmobile/include/mach/smp.h

@@ -1,16 +0,0 @@
-#ifndef __MACH_SMP_H
-#define __MACH_SMP_H
-
-#include <asm/hardware/gic.h>
-
-/*
- * We use IRQ1 as the IPI
- */
-static inline void smp_cross_call(const struct cpumask *mask, int ipi)
-{
-#if defined(CONFIG_ARM_GIC)
-	gic_raise_softirq(mask, ipi);
-#endif
-}
-
-#endif

arch/arm/mach-shmobile/platsmp.c

@@ -16,6 +16,7 @@
 #include <linux/device.h>
 #include <linux/smp.h>
 #include <linux/io.h>
+#include <asm/hardware/gic.h>
 #include <asm/localtimer.h>
 #include <asm/mach-types.h>
 #include <mach/common.h>
@@ -57,6 +58,8 @@ void __init smp_init_cpus(void)
 
 	for (i = 0; i < ncores; i++)
 		set_cpu_possible(i, true);
+
+	set_smp_cross_call(gic_raise_softirq);
 }
 
 void __init platform_smp_prepare_cpus(unsigned int max_cpus)

arch/arm/mach-tegra/include/mach/smp.h

@@ -1,14 +0,0 @@
-#ifndef ASMARM_ARCH_SMP_H
-#define ASMARM_ARCH_SMP_H
-
-#include <asm/hardware/gic.h>
-
-/*
- * We use IRQ1 as the IPI
- */
-static inline void smp_cross_call(const struct cpumask *mask, int ipi)
-{
-	gic_raise_softirq(mask, ipi);
-}
-
-#endif

arch/arm/mach-tegra/platsmp.c

@@ -20,6 +20,7 @@
 #include <linux/io.h>
 
 #include <asm/cacheflush.h>
+#include <asm/hardware/gic.h>
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
 #include <asm/smp_scu.h>
@@ -122,6 +123,8 @@ void __init smp_init_cpus(void)
 
 	for (i = 0; i < ncores; i++)
 		cpu_set(i, cpu_possible_map);
+
+	set_smp_cross_call(gic_raise_softirq);
 }
 
 void __init platform_smp_prepare_cpus(unsigned int max_cpus)

arch/arm/mach-ux500/include/mach/smp.h

@@ -1,24 +0,0 @@
-/*
- * This file is based ARM realview platform.
- * Copyright (C) ARM Limited.
- *
- * This file is licensed under  the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-#ifndef ASMARM_ARCH_SMP_H
-#define ASMARM_ARCH_SMP_H
-
-#include <asm/hardware/gic.h>
-
-/* This is required to wakeup the secondary core */
-extern void u8500_secondary_startup(void);
-
-/*
- * We use IRQ1 as the IPI
- */
-static inline void smp_cross_call(const struct cpumask *mask, int ipi)
-{
-	gic_raise_softirq(mask, ipi);
-}
-#endif

arch/arm/mach-ux500/platsmp.c

@@ -18,6 +18,7 @@
 #include <linux/io.h>
 
 #include <asm/cacheflush.h>
+#include <asm/hardware/gic.h>
 #include <asm/smp_scu.h>
 #include <mach/hardware.h>
 #include <mach/setup.h>
@@ -94,7 +95,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
 	 */
 	write_pen_release(cpu);
 
-	smp_cross_call(cpumask_of(cpu), 1);
+	gic_raise_softirq(cpumask_of(cpu), 1);
 
 	timeout = jiffies + (1 * HZ);
 	while (time_before(jiffies, timeout)) {
@@ -162,6 +163,8 @@ void __init smp_init_cpus(void)
 
 	for (i = 0; i < ncores; i++)
 		set_cpu_possible(i, true);
+
+	set_smp_cross_call(gic_raise_softirq);
 }
 
 void __init platform_smp_prepare_cpus(unsigned int max_cpus)

arch/arm/mach-vexpress/ct-ca9x4.c

@@ -210,6 +210,8 @@ static void ct_ca9x4_init_cpu_map(void)
 
 	for (i = 0; i < ncores; ++i)
 		set_cpu_possible(i, true);
+
+	set_smp_cross_call(gic_raise_softirq);
 }
 
 static void ct_ca9x4_smp_enable(unsigned int max_cpus)

arch/arm/mach-vexpress/include/mach/smp.h

@@ -1,13 +0,0 @@
-#ifndef __MACH_SMP_H
-#define __MACH_SMP_H
-
-#include <asm/hardware/gic.h>
-
-/*
- * We use IRQ1 as the IPI
- */
-static inline void smp_cross_call(const struct cpumask *mask, int ipi)
-{
-	gic_raise_softirq(mask, ipi);
-}
-#endif

arch/arm/plat-omap/include/plat/smp.h

@@ -1,30 +0,0 @@
-/*
- * OMAP4 machine specific smp.h
- *
- * Copyright (C) 2009 Texas Instruments, Inc.
- *
- * Author:
- *	Santosh Shilimkar <santosh.shilimkar@ti.com>
- *
- * Interface functions needed for the SMP. This file is based on arm
- * realview smp platform.
- * Copyright (c) 2003 ARM Limited.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef OMAP_ARCH_SMP_H
-#define OMAP_ARCH_SMP_H
-
-#include <asm/hardware/gic.h>
-
-/*
- * We use Soft IRQ1 as the IPI
- */
-static inline void smp_cross_call(const struct cpumask *mask, int ipi)
-{
-	gic_raise_softirq(mask, ipi);
-}
-
-#endif

arch/arm/plat-versatile/platsmp.c

@@ -16,6 +16,7 @@
 #include <linux/smp.h>
 
 #include <asm/cacheflush.h>
+#include <asm/hardware/gic.h>
 
 /*
  * control for which core is the next to come out of the secondary
@@ -83,7 +84,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
 	 * the boot monitor to read the system wide flags register,
 	 * and branch to the address found there.
 	 */
-	smp_cross_call(cpumask_of(cpu), 1);
+	gic_raise_softirq(cpumask_of(cpu), 1);
 
 	timeout = jiffies + (1 * HZ);
 	while (time_before(jiffies, timeout)) {