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ARM: SoC: convert ux500 to SMP operations

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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>
This commit is contained in:
Marc Zyngier 2011-09-08 13:15:22 +01:00 committed by Arnd Bergmann
parent 44ea349f5b
commit 5ac21a943e
4 changed files with 30 additions and 31 deletions
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4
arch/arm/mach-ux500/board-mop500.c
View file

@ -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 */

36
arch/arm/mach-ux500/hotplug.c
View file

@ -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;
}

3
arch/arm/mach-ux500/include/mach/setup.h
View file

@ -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 */

18
arch/arm/mach-ux500/platsmp.c
View file

@ -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
};