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authorMarc Zyngier <marc.zyngier@arm.com>2011-09-08 14:15:22 +0200
committerArnd Bergmann <arnd@arndb.de>2012-09-14 11:14:58 +0200
commit5ac21a943e4052ef6743b09b6a06fbb683a3519d (patch)
treee47d3289d14ebe936ecf720137f0a70b6258b7d7 /arch
parentARM: SoC: convert MSM to SMP operations (diff)
downloadlinux-5ac21a943e4052ef6743b09b6a06fbb683a3519d.tar.xz
linux-5ac21a943e4052ef6743b09b6a06fbb683a3519d.zip
ARM: SoC: convert ux500 to SMP operations
Convert ux500 platforms to use struct smp_operations to provide their SMP and CPU hotplug operations. Cc: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-ux500/board-mop500.c4
-rw-r--r--arch/arm/mach-ux500/hotplug.c36
-rw-r--r--arch/arm/mach-ux500/include/mach/setup.h3
-rw-r--r--arch/arm/mach-ux500/platsmp.c18
4 files changed, 30 insertions, 31 deletions
diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
index a534d8880de1..1c6f74b62dfa 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -694,6 +694,7 @@ static void __init hrefv60_init_machine(void)
MACHINE_START(U8500, "ST-Ericsson MOP500 platform")
/* Maintainer: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> */
.atag_offset = 0x100,
+ .smp = smp_ops(ux500_smp_ops),
.map_io = u8500_map_io,
.init_irq = ux500_init_irq,
/* we re-use nomadik timer here */
@@ -705,6 +706,7 @@ MACHINE_END
MACHINE_START(HREFV60, "ST-Ericsson U8500 Platform HREFv60+")
.atag_offset = 0x100,
+ .smp = smp_ops(ux500_smp_ops),
.map_io = u8500_map_io,
.init_irq = ux500_init_irq,
.timer = &ux500_timer,
@@ -715,6 +717,7 @@ MACHINE_END
MACHINE_START(SNOWBALL, "Calao Systems Snowball platform")
.atag_offset = 0x100,
+ .smp = smp_ops(ux500_smp_ops),
.map_io = u8500_map_io,
.init_irq = ux500_init_irq,
/* we re-use nomadik timer here */
@@ -844,6 +847,7 @@ static const char * u8500_dt_board_compat[] = {
DT_MACHINE_START(U8500_DT, "ST-Ericsson U8500 platform (Device Tree Support)")
+ .smp = smp_ops(ux500_smp_ops),
.map_io = u8500_map_io,
.init_irq = ux500_init_irq,
/* we re-use nomadik timer here */
diff --git a/arch/arm/mach-ux500/hotplug.c b/arch/arm/mach-ux500/hotplug.c
index c76f0f456f04..b8e4d9ed62d8 100644
--- a/arch/arm/mach-ux500/hotplug.c
+++ b/arch/arm/mach-ux500/hotplug.c
@@ -15,13 +15,20 @@
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
+#include <mach/setup.h>
+
extern volatile int pen_release;
-static inline void platform_do_lowpower(unsigned int cpu)
+/*
+ * platform-specific code to shutdown a CPU
+ *
+ * Called with IRQs disabled
+ */
+void __ref ux500_cpu_die(unsigned int cpu)
{
flush_cache_all();
- /* we put the platform to just WFI */
+ /* directly enter low power state, skipping secure registers */
for (;;) {
__asm__ __volatile__("dsb\n\t" "wfi\n\t"
: : : "memory");
@@ -33,28 +40,3 @@ static inline void platform_do_lowpower(unsigned int cpu)
}
}
}
-
-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)
-{
- /* directly enter low power state, skipping secure registers */
- platform_do_lowpower(cpu);
-}
-
-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-ux500/include/mach/setup.h b/arch/arm/mach-ux500/include/mach/setup.h
index 7914e5eaa9c7..6be4c4d2ab88 100644
--- a/arch/arm/mach-ux500/include/mach/setup.h
+++ b/arch/arm/mach-ux500/include/mach/setup.h
@@ -45,4 +45,7 @@ extern struct sys_timer ux500_timer;
.type = MT_MEMORY, \
}
+extern struct smp_operations ux500_smp_ops;
+extern void ux500_cpu_die(unsigned int cpu);
+
#endif /* __ASM_ARCH_SETUP_H */
diff --git a/arch/arm/mach-ux500/platsmp.c b/arch/arm/mach-ux500/platsmp.c
index da1d5ad5bd45..b6f4e0e787ec 100644
--- a/arch/arm/mach-ux500/platsmp.c
+++ b/arch/arm/mach-ux500/platsmp.c
@@ -58,7 +58,7 @@ static void __iomem *scu_base_addr(void)
static DEFINE_SPINLOCK(boot_lock);
-void __cpuinit platform_secondary_init(unsigned int cpu)
+static void __cpuinit ux500_secondary_init(unsigned int cpu)
{
/*
* if any interrupts are already enabled for the primary
@@ -80,7 +80,7 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
spin_unlock(&boot_lock);
}
-int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
+static int __cpuinit ux500_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned long timeout;
@@ -145,7 +145,7 @@ static void __init wakeup_secondary(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 ux500_smp_init_cpus(void)
{
void __iomem *scu_base = scu_base_addr();
unsigned int i, ncores;
@@ -165,9 +165,19 @@ 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 ux500_smp_prepare_cpus(unsigned int max_cpus)
{
scu_enable(scu_base_addr());
wakeup_secondary();
}
+
+struct smp_operations ux500_smp_ops __initdata = {
+ .smp_init_cpus = ux500_smp_init_cpus,
+ .smp_prepare_cpus = ux500_smp_prepare_cpus,
+ .smp_secondary_init = ux500_secondary_init,
+ .smp_boot_secondary = ux500_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+ .cpu_die = ux500_cpu_die,
+#endif
+};