From 44ea349f5b7e0b4865de9ca6b4437c746eede40c Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Thu, 8 Sep 2011 13:15:22 +0100 Subject: ARM: SoC: convert MSM to SMP operations Convert MSM SMP platforms to use struct smp_operations to provide their SMP and CPU hotplug operations. Signed-off-by: Marc Zyngier Acked-by: Nicolas Pitre Cc: David Brown Signed-off-by: Arnd Bergmann --- arch/arm/mach-msm/hotplug.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-) (limited to 'arch/arm/mach-msm/hotplug.c') diff --git a/arch/arm/mach-msm/hotplug.c b/arch/arm/mach-msm/hotplug.c index a446fc14221..fedaa25b293 100644 --- a/arch/arm/mach-msm/hotplug.c +++ b/arch/arm/mach-msm/hotplug.c @@ -13,6 +13,8 @@ #include #include +#include "core.h" + extern volatile int pen_release; static inline void cpu_enter_lowpower(void) @@ -57,17 +59,12 @@ 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) +void __ref msm_cpu_die(unsigned int cpu) { /* * we're ready for shutdown now, so do it @@ -81,12 +78,3 @@ void platform_cpu_die(unsigned int cpu) */ cpu_leave_lowpower(); } - -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; -} -- cgit v1.2.3-70-g09d2 From 28e8e29c616f947348cc66bea684d0035c76021a Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 12 Jun 2012 11:16:27 +0100 Subject: ARM: consolidate pen_release instead of having per platform definitions Almost each SMP platform defines pen_release to manage booting secondary CPUs. This of course clashes with the single zImage effort. Add the pen_release definition to the ARM SMP code, and remove all others. This should only be used by platforms which lack any kind of CPU power management... Reported-by: Arnd Bergmann Signed-off-by: Marc Zyngier Acked-by: Nicolas Pitre Signed-off-by: Arnd Bergmann --- arch/arm/include/asm/smp.h | 1 + arch/arm/kernel/smp.c | 6 ++++++ arch/arm/mach-exynos/hotplug.c | 2 -- arch/arm/mach-exynos/platsmp.c | 7 ------- arch/arm/mach-msm/hotplug.c | 2 -- arch/arm/mach-msm/platsmp.c | 5 ----- arch/arm/mach-realview/hotplug.c | 2 -- arch/arm/mach-spear13xx/hotplug.c | 2 -- arch/arm/mach-spear13xx/platsmp.c | 5 ----- arch/arm/mach-ux500/hotplug.c | 2 -- arch/arm/mach-ux500/platsmp.c | 6 ------ arch/arm/mach-vexpress/hotplug.c | 2 -- arch/arm/plat-versatile/platsmp.c | 6 ------ 13 files changed, 7 insertions(+), 41 deletions(-) (limited to 'arch/arm/mach-msm/hotplug.c') diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h index 3a8cfee26c9..2e3be16c676 100644 --- a/arch/arm/include/asm/smp.h +++ b/arch/arm/include/asm/smp.h @@ -70,6 +70,7 @@ struct secondary_data { void *stack; }; extern struct secondary_data secondary_data; +extern volatile int pen_release; extern int __cpu_disable(void); diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index ac3ce029afb..aa4ffe6e5ec 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -51,6 +51,12 @@ */ struct secondary_data secondary_data; +/* + * control for which core is the next to come out of the secondary + * boot "holding pen" + */ +volatile int __cpuinitdata pen_release = -1; + enum ipi_msg_type { IPI_TIMER = 2, IPI_RESCHEDULE, diff --git a/arch/arm/mach-exynos/hotplug.c b/arch/arm/mach-exynos/hotplug.c index edccc36dd69..f4d7dd20cda 100644 --- a/arch/arm/mach-exynos/hotplug.c +++ b/arch/arm/mach-exynos/hotplug.c @@ -23,8 +23,6 @@ #include "common.h" -extern volatile int pen_release; - static inline void cpu_enter_lowpower(void) { unsigned int v; diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c index 3fad8ad3f92..8d57e4223bd 100644 --- a/arch/arm/mach-exynos/platsmp.c +++ b/arch/arm/mach-exynos/platsmp.c @@ -39,13 +39,6 @@ extern void exynos4_secondary_startup(void); #define CPU1_BOOT_REG (samsung_rev() == EXYNOS4210_REV_1_1 ? \ S5P_INFORM5 : S5P_VA_SYSRAM) -/* - * control for which core is the next to come out of the secondary - * boot "holding pen" - */ - -volatile int __cpuinitdata pen_release = -1; - /* * Write pen_release in a way that is guaranteed to be visible to all * observers, irrespective of whether they're taking part in coherency diff --git a/arch/arm/mach-msm/hotplug.c b/arch/arm/mach-msm/hotplug.c index fedaa25b293..002ac1e4723 100644 --- a/arch/arm/mach-msm/hotplug.c +++ b/arch/arm/mach-msm/hotplug.c @@ -15,8 +15,6 @@ #include "core.h" -extern volatile int pen_release; - static inline void cpu_enter_lowpower(void) { /* Just flush the cache. Changing the coherency is not yet diff --git a/arch/arm/mach-msm/platsmp.c b/arch/arm/mach-msm/platsmp.c index ba3c4b0d523..57af32ef75e 100644 --- a/arch/arm/mach-msm/platsmp.c +++ b/arch/arm/mach-msm/platsmp.c @@ -35,11 +35,6 @@ #define GIC_PPI_EDGE_MASK 0xFFFFD7FF extern void msm_secondary_startup(void); -/* - * control for which core is the next to come out of the secondary - * boot "holding pen". - */ -volatile int pen_release = -1; static DEFINE_SPINLOCK(boot_lock); diff --git a/arch/arm/mach-realview/hotplug.c b/arch/arm/mach-realview/hotplug.c index fef4f449522..53818e5cd3a 100644 --- a/arch/arm/mach-realview/hotplug.c +++ b/arch/arm/mach-realview/hotplug.c @@ -16,8 +16,6 @@ #include #include -extern volatile int pen_release; - static inline void cpu_enter_lowpower(void) { unsigned int v; diff --git a/arch/arm/mach-spear13xx/hotplug.c b/arch/arm/mach-spear13xx/hotplug.c index 485fd4367bb..a7d2dd11a4f 100644 --- a/arch/arm/mach-spear13xx/hotplug.c +++ b/arch/arm/mach-spear13xx/hotplug.c @@ -17,8 +17,6 @@ #include #include -extern volatile int pen_release; - static inline void cpu_enter_lowpower(void) { unsigned int v; diff --git a/arch/arm/mach-spear13xx/platsmp.c b/arch/arm/mach-spear13xx/platsmp.c index 806343c7b5d..2eaa3fa7b43 100644 --- a/arch/arm/mach-spear13xx/platsmp.c +++ b/arch/arm/mach-spear13xx/platsmp.c @@ -21,11 +21,6 @@ #include #include -/* - * control for which core is the next to come out of the secondary - * boot "holding pen" - */ -volatile int __cpuinitdata pen_release = -1; static DEFINE_SPINLOCK(boot_lock); static void __iomem *scu_base = IOMEM(VA_SCU_BASE); diff --git a/arch/arm/mach-ux500/hotplug.c b/arch/arm/mach-ux500/hotplug.c index b8e4d9ed62d..2f6af259015 100644 --- a/arch/arm/mach-ux500/hotplug.c +++ b/arch/arm/mach-ux500/hotplug.c @@ -17,8 +17,6 @@ #include -extern volatile int pen_release; - /* * platform-specific code to shutdown a CPU * diff --git a/arch/arm/mach-ux500/platsmp.c b/arch/arm/mach-ux500/platsmp.c index b6f4e0e787e..d60873ee38b 100644 --- a/arch/arm/mach-ux500/platsmp.c +++ b/arch/arm/mach-ux500/platsmp.c @@ -27,12 +27,6 @@ /* This is called from headsmp.S to wakeup the secondary core */ extern void u8500_secondary_startup(void); -/* - * control for which core is the next to come out of the secondary - * boot "holding pen" - */ -volatile int pen_release = -1; - /* * Write pen_release in a way that is guaranteed to be visible to all * observers, irrespective of whether they're taking part in coherency diff --git a/arch/arm/mach-vexpress/hotplug.c b/arch/arm/mach-vexpress/hotplug.c index 734423a39e7..a141b98d84f 100644 --- a/arch/arm/mach-vexpress/hotplug.c +++ b/arch/arm/mach-vexpress/hotplug.c @@ -16,8 +16,6 @@ #include #include -extern volatile int pen_release; - static inline void cpu_enter_lowpower(void) { unsigned int v; diff --git a/arch/arm/plat-versatile/platsmp.c b/arch/arm/plat-versatile/platsmp.c index 39e60ac4fe6..04ca4937d8c 100644 --- a/arch/arm/plat-versatile/platsmp.c +++ b/arch/arm/plat-versatile/platsmp.c @@ -19,12 +19,6 @@ #include #include -/* - * control for which core is the next to come out of the secondary - * boot "holding pen" - */ -volatile int __cpuinitdata pen_release = -1; - /* * Write pen_release in a way that is guaranteed to be visible to all * observers, irrespective of whether they're taking part in coherency -- cgit v1.2.3-70-g09d2