ARM: SoC: convert VExpress/RealView to SMP operations

Convert both Realview and VExpress to use struct smp_operations to
provide their SMP and CPU hotplug operation.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

11 files changed, 59 insertions, 40 deletions

diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
index f8f2c0ac4c0..78cd970c80f 100644
--- a/arch/arm/mach-realview/core.h
+++ b/arch/arm/mach-realview/core.h
@@ -56,4 +56,7 @@ extern void realview_init_early(void);
 extern void realview_fixup(struct tag *tags, char **from,
                            struct meminfo *meminfo);
 
+extern struct smp_operations realview_smp_ops;
+extern void realview_cpu_die(unsigned int cpu);
+
 #endif
diff --git a/arch/arm/mach-realview/hotplug.c b/arch/arm/mach-realview/hotplug.c
index 57d9efba295..fef4f449522 100644
--- a/arch/arm/mach-realview/hotplug.c
+++ b/arch/arm/mach-realview/hotplug.c
@@ -89,17 +89,12 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
         }
 }
 
-int platform_cpu_kill(unsigned int cpu)
-{
-        return 1;
-}
-
 /*
  * platform-specific code to shutdown a CPU
  *
  * Called with IRQs disabled
  */
-void platform_cpu_die(unsigned int cpu)
+void __ref realview_cpu_die(unsigned int cpu)
 {
         int spurious = 0;
 
@@ -118,12 +113,3 @@ void platform_cpu_die(unsigned int cpu)
         if (spurious)
                 pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
 }
-
-int platform_cpu_disable(unsigned int cpu)
-{
-        /*
-         * we don't allow CPU 0 to be shutdown (it is still too special
-         * e.g. clock tick interrupts)
-         */
-        return cpu == 0 ? -EPERM : 0;
-}
diff --git a/arch/arm/mach-realview/platsmp.c b/arch/arm/mach-realview/platsmp.c
index 17c878ddbc7..300f7064465 100644
--- a/arch/arm/mach-realview/platsmp.c
+++ b/arch/arm/mach-realview/platsmp.c
@@ -22,9 +22,9 @@
 #include <mach/board-pb11mp.h>
 #include <mach/board-pbx.h>
 
-#include "core.h"
+#include <plat/platsmp.h>
 
-extern void versatile_secondary_startup(void);
+#include "core.h"
 
 static void __iomem *scu_base_addr(void)
 {
@@ -43,7 +43,7 @@ static void __iomem *scu_base_addr(void)
  * Initialise the CPU possible map early - this describes the CPUs
  * which may be present or become present in the system.
  */
-void __init smp_init_cpus(void)
+static void __init realview_smp_init_cpus(void)
 {
         void __iomem *scu_base = scu_base_addr();
         unsigned int i, ncores;
@@ -63,7 +63,7 @@ void __init smp_init_cpus(void)
         set_smp_cross_call(gic_raise_softirq);
 }
 
-void __init platform_smp_prepare_cpus(unsigned int max_cpus)
+static void __init realview_smp_prepare_cpus(unsigned int max_cpus)
 {
 
         scu_enable(scu_base_addr());
@@ -77,3 +77,13 @@ void __init platform_smp_prepare_cpus(unsigned int max_cpus)
         __raw_writel(virt_to_phys(versatile_secondary_startup),
                      __io_address(REALVIEW_SYS_FLAGSSET));
 }
+
+struct smp_operations realview_smp_ops __initdata = {
+        .smp_init_cpus          = realview_smp_init_cpus,
+        .smp_prepare_cpus       = realview_smp_prepare_cpus,
+        .smp_secondary_init     = versatile_secondary_init,
+        .smp_boot_secondary     = versatile_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+        .cpu_die                = realview_cpu_die,
+#endif
+};
diff --git a/arch/arm/mach-realview/realview_pb11mp.c b/arch/arm/mach-realview/realview_pb11mp.c
index a98c536e332..2eacda179f7 100644
--- a/arch/arm/mach-realview/realview_pb11mp.c
+++ b/arch/arm/mach-realview/realview_pb11mp.c
@@ -366,6 +366,7 @@ static void __init realview_pb11mp_init(void)
 MACHINE_START(REALVIEW_PB11MP, "ARM-RealView PB11MPCore")
         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
         .atag_offset    = 0x100,
+        .smp            = smp_ops(realview_smp_ops),
         .fixup          = realview_fixup,
         .map_io         = realview_pb11mp_map_io,
         .init_early     = realview_init_early,
diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
index 3f2f605624e..2cd4f157c6f 100644
--- a/arch/arm/mach-realview/realview_pbx.c
+++ b/arch/arm/mach-realview/realview_pbx.c
@@ -403,6 +403,7 @@ static void __init realview_pbx_init(void)
 MACHINE_START(REALVIEW_PBX, "ARM-RealView PBX")
         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
         .atag_offset    = 0x100,
+        .smp            = smp_ops(realview_smp_ops),
         .fixup          = realview_pbx_fixup,
         .map_io         = realview_pbx_map_io,
         .init_early     = realview_init_early,
diff --git a/arch/arm/mach-vexpress/core.h b/arch/arm/mach-vexpress/core.h
index a3a4980770b..f134cd4a85f 100644
--- a/arch/arm/mach-vexpress/core.h
+++ b/arch/arm/mach-vexpress/core.h
@@ -5,3 +5,7 @@
 #define V2T_PERIPH 0xf8200000
 
 void vexpress_dt_smp_map_io(void);
+
+extern struct smp_operations    vexpress_smp_ops;
+
+extern void vexpress_cpu_die(unsigned int cpu);
diff --git a/arch/arm/mach-vexpress/hotplug.c b/arch/arm/mach-vexpress/hotplug.c
index c504a72b94d..734423a39e7 100644
--- a/arch/arm/mach-vexpress/hotplug.c
+++ b/arch/arm/mach-vexpress/hotplug.c
@@ -84,17 +84,12 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
         }
 }
 
-int platform_cpu_kill(unsigned int cpu)
-{
-        return 1;
-}
-
 /*
  * platform-specific code to shutdown a CPU
  *
  * Called with IRQs disabled
  */
-void platform_cpu_die(unsigned int cpu)
+void __ref vexpress_cpu_die(unsigned int cpu)
 {
         int spurious = 0;
 
@@ -113,12 +108,3 @@ void platform_cpu_die(unsigned int cpu)
         if (spurious)
                 pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
 }
-
-int platform_cpu_disable(unsigned int cpu)
-{
-        /*
-         * we don't allow CPU 0 to be shutdown (it is still too special
-         * e.g. clock tick interrupts)
-         */
-        return cpu == 0 ? -EPERM : 0;
-}
diff --git a/arch/arm/mach-vexpress/platsmp.c b/arch/arm/mach-vexpress/platsmp.c
index 14ba1128ae8..7db27c8c05c 100644
--- a/arch/arm/mach-vexpress/platsmp.c
+++ b/arch/arm/mach-vexpress/platsmp.c
@@ -20,9 +20,9 @@
 
 #include <mach/motherboard.h>
 
-#include "core.h"
+#include <plat/platsmp.h>
 
-extern void versatile_secondary_startup(void);
+#include "core.h"
 
 #if defined(CONFIG_OF)
 
@@ -167,7 +167,7 @@ void __init vexpress_dt_smp_prepare_cpus(unsigned int max_cpus)
  * Initialise the CPU possible map early - this describes the CPUs
  * which may be present or become present in the system.
  */
-void __init smp_init_cpus(void)
+static void __init vexpress_smp_init_cpus(void)
 {
         if (ct_desc)
                 ct_desc->init_cpu_map();
@@ -176,7 +176,7 @@ void __init smp_init_cpus(void)
 
 }
 
-void __init platform_smp_prepare_cpus(unsigned int max_cpus)
+static void __init vexpress_smp_prepare_cpus(unsigned int max_cpus)
 {
         /*
          * Initialise the present map, which describes the set of CPUs
@@ -195,3 +195,13 @@ void __init platform_smp_prepare_cpus(unsigned int max_cpus)
          */
         v2m_flags_set(virt_to_phys(versatile_secondary_startup));
 }
+
+struct smp_operations __initdata vexpress_smp_ops = {
+        .smp_init_cpus          = vexpress_smp_init_cpus,
+        .smp_prepare_cpus       = vexpress_smp_prepare_cpus,
+        .smp_secondary_init     = versatile_secondary_init,
+        .smp_boot_secondary     = versatile_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+        .cpu_die                = vexpress_cpu_die,
+#endif
+};
diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index 37608f22ee3..722ef339c5f 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -5,6 +5,7 @@
 #include <linux/amba/bus.h>
 #include <linux/amba/mmci.h>
 #include <linux/io.h>
+#include <linux/smp.h>
 #include <linux/init.h>
 #include <linux/of_address.h>
 #include <linux/of_fdt.h>
@@ -38,6 +39,7 @@
 #include <mach/motherboard.h>
 
 #include <plat/sched_clock.h>
+#include <plat/platsmp.h>
 
 #include "core.h"
 
@@ -530,6 +532,7 @@ static void __init v2m_init(void)
 
 MACHINE_START(VEXPRESS, "ARM-Versatile Express")
         .atag_offset    = 0x100,
+        .smp            = smp_ops(vexpress_smp_ops),
         .map_io         = v2m_map_io,
         .init_early     = v2m_init_early,
         .init_irq       = v2m_init_irq,
@@ -663,6 +666,7 @@ const static char *v2m_dt_match[] __initconst = {
 
 DT_MACHINE_START(VEXPRESS_DT, "ARM-Versatile Express")
         .dt_compat      = v2m_dt_match,
+        .smp            = smp_ops(vexpress_smp_ops),
         .map_io         = v2m_dt_map_io,
         .init_early     = v2m_dt_init_early,
         .init_irq       = v2m_dt_init_irq,
diff --git a/arch/arm/plat-versatile/include/plat/platsmp.h b/arch/arm/plat-versatile/include/plat/platsmp.h
new file mode 100644
index 00000000000..50fb830192e
--- /dev/null
+++ b/arch/arm/plat-versatile/include/plat/platsmp.h
@@ -0,0 +1,14 @@
+/*
+ *  linux/arch/arm/plat-versatile/include/plat/platsmp.h
+ *
+ *  Copyright (C) 2011 ARM Ltd.
+ *  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 as
+ * published by the Free Software Foundation.
+ */
+
+extern void versatile_secondary_startup(void);
+extern void versatile_secondary_init(unsigned int cpu);
+extern int  versatile_boot_secondary(unsigned int cpu, struct task_struct *idle);
diff --git a/arch/arm/plat-versatile/platsmp.c b/arch/arm/plat-versatile/platsmp.c
index d7c5c171f5a..39e60ac4fe6 100644
--- a/arch/arm/plat-versatile/platsmp.c
+++ b/arch/arm/plat-versatile/platsmp.c
@@ -40,7 +40,7 @@ static void __cpuinit write_pen_release(int val)
 
 static DEFINE_SPINLOCK(boot_lock);
 
-void __cpuinit platform_secondary_init(unsigned int cpu)
+void __cpuinit versatile_secondary_init(unsigned int cpu)
 {
         /*
          * if any interrupts are already enabled for the primary
@@ -62,7 +62,7 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
         spin_unlock(&boot_lock);
 }
 
-int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
+int __cpuinit versatile_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
         unsigned long timeout;