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Date: Wed, 12 Sep 2012 16:58:24 +0200
From: Arnd Bergmann <arnd@...db.de>
To: Marc Zyngier <marc.zyngier@....com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>,
Viresh Kumar <viresh.linux@...il.com>,
Shiraz Hashim <shiraz.hashim@...com>, spear-devel@...t.st.com
Subject: [PATCH v9 11/13] ARM: SoC: convert spear13xx to SoC descriptor
Convert the spear13xx platform to use the SoC descriptor to provide
its SMP and CPU hotplug operations.
Cc: Viresh Kumar <viresh.linux@...il.com>
Cc: Shiraz Hashim <shiraz.hashim@...com>
Cc: spear-devel@...t.st.com
Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
arch/arm/mach-spear13xx/hotplug.c | 20 +++-----------------
arch/arm/mach-spear13xx/include/mach/generic.h | 3 +++
arch/arm/mach-spear13xx/platsmp.c | 20 +++++++++++++++-----
arch/arm/mach-spear13xx/spear1310.c | 1 +
arch/arm/mach-spear13xx/spear1340.c | 1 +
5 files changed, 23 insertions(+), 22 deletions(-)
diff --git a/arch/arm/mach-spear13xx/hotplug.c b/arch/arm/mach-spear13xx/hotplug.c
index 5c6867b..22e99b0 100644
--- a/arch/arm/mach-spear13xx/hotplug.c
+++ b/arch/arm/mach-spear13xx/hotplug.c
@@ -56,7 +56,7 @@ static inline void cpu_leave_lowpower(void)
: "cc");
}
-static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
+static inline void spear13xx_do_lowpower(unsigned int cpu, int *spurious)
{
for (;;) {
wfi();
@@ -79,17 +79,12 @@ 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 __cpuinit platform_cpu_die(unsigned int cpu)
+void __cpuinit spear13xx_cpu_die(unsigned int cpu)
{
int spurious = 0;
@@ -97,7 +92,7 @@ void __cpuinit platform_cpu_die(unsigned int cpu)
* we're ready for shutdown now, so do it
*/
cpu_enter_lowpower();
- platform_do_lowpower(cpu, &spurious);
+ spear13xx_do_lowpower(cpu, &spurious);
/*
* bring this CPU back into the world of cache
@@ -108,12 +103,3 @@ void __cpuinit 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-spear13xx/include/mach/generic.h b/arch/arm/mach-spear13xx/include/mach/generic.h
index dac57fd0c..c33f4d9 100644
--- a/arch/arm/mach-spear13xx/include/mach/generic.h
+++ b/arch/arm/mach-spear13xx/include/mach/generic.h
@@ -33,6 +33,9 @@ void __init spear13xx_l2x0_init(void);
bool dw_dma_filter(struct dma_chan *chan, void *slave);
void spear_restart(char, const char *);
void spear13xx_secondary_startup(void);
+void __cpuinit spear13xx_cpu_die(unsigned int cpu);
+
+extern struct smp_operations spear13xx_smp_ops;
#ifdef CONFIG_MACH_SPEAR1310
void __init spear1310_clk_init(void);
diff --git a/arch/arm/mach-spear13xx/platsmp.c b/arch/arm/mach-spear13xx/platsmp.c
index f5d07f2..806343c 100644
--- a/arch/arm/mach-spear13xx/platsmp.c
+++ b/arch/arm/mach-spear13xx/platsmp.c
@@ -19,6 +19,7 @@
#include <asm/hardware/gic.h>
#include <asm/smp_scu.h>
#include <mach/spear.h>
+#include <mach/generic.h>
/*
* control for which core is the next to come out of the secondary
@@ -28,9 +29,8 @@ volatile int __cpuinitdata pen_release = -1;
static DEFINE_SPINLOCK(boot_lock);
static void __iomem *scu_base = IOMEM(VA_SCU_BASE);
-extern void spear13xx_secondary_startup(void);
-void __cpuinit platform_secondary_init(unsigned int cpu)
+static void __cpuinit spear13xx_secondary_init(unsigned int cpu)
{
/*
* if any interrupts are already enabled for the primary
@@ -53,7 +53,7 @@ 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 spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned long timeout;
@@ -97,7 +97,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* 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 spear13xx_smp_init_cpus(void)
{
unsigned int i, ncores = scu_get_core_count(scu_base);
@@ -113,7 +113,7 @@ 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 spear13xx_smp_prepare_cpus(unsigned int max_cpus)
{
scu_enable(scu_base);
@@ -125,3 +125,13 @@ void __init platform_smp_prepare_cpus(unsigned int max_cpus)
*/
__raw_writel(virt_to_phys(spear13xx_secondary_startup), SYS_LOCATION);
}
+
+struct smp_operations spear13xx_smp_ops __initdata = {
+ .smp_init_cpus = spear13xx_smp_init_cpus,
+ .smp_prepare_cpus = spear13xx_smp_prepare_cpus,
+ .smp_secondary_init = spear13xx_secondary_init,
+ .smp_boot_secondary = spear13xx_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+ .cpu_die = spear13xx_cpu_die,
+#endif
+};
diff --git a/arch/arm/mach-spear13xx/spear1310.c b/arch/arm/mach-spear13xx/spear1310.c
index 732d29b..9fbbfc5 100644
--- a/arch/arm/mach-spear13xx/spear1310.c
+++ b/arch/arm/mach-spear13xx/spear1310.c
@@ -78,6 +78,7 @@ static void __init spear1310_map_io(void)
}
DT_MACHINE_START(SPEAR1310_DT, "ST SPEAr1310 SoC with Flattened Device Tree")
+ .smp = smp_ops(spear13xx_smp_ops),
.map_io = spear1310_map_io,
.init_irq = spear13xx_dt_init_irq,
.handle_irq = gic_handle_irq,
diff --git a/arch/arm/mach-spear13xx/spear1340.c b/arch/arm/mach-spear13xx/spear1340.c
index 81e4ed7..081014f 100644
--- a/arch/arm/mach-spear13xx/spear1340.c
+++ b/arch/arm/mach-spear13xx/spear1340.c
@@ -182,6 +182,7 @@ static const char * const spear1340_dt_board_compat[] = {
};
DT_MACHINE_START(SPEAR1340_DT, "ST SPEAr1340 SoC with Flattened Device Tree")
+ .smp = smp_ops(spear13xx_smp_ops),
.map_io = spear13xx_map_io,
.init_irq = spear13xx_dt_init_irq,
.handle_irq = gic_handle_irq,
--
1.7.10
--
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