diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2015-10-14 12:08:02 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2015-10-28 13:43:41 +0300 |
| commit | 286130ebf196d9643800977d57bdb7cda266b49e (patch) | |
| tree | 0048c504925232821d822b201a6f58b87f0b6e9f /arch/arc | |
| parent | 8721a7f5a6f95c38cacbe1be22c820a7698926ef (diff) | |
| download | linux-286130ebf196d9643800977d57bdb7cda266b49e.tar.xz | |
ARC: smp: Introduce smp hook @init_irq_cpu called for all cores
Note this is not part of platform owned static machine_desc,
but more of device owned plat_smp_ops (rather misnamed) which a IPI
provider or some such typically defines.
This will help us seperate out the IPI registration from platform
specific init_cpu_smp() into device specific init_irq_cpu()
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/smp.h | 3 | ||||
| -rw-r--r-- | arch/arc/kernel/irq.c | 6 | ||||
| -rw-r--r-- | arch/arc/kernel/smp.c | 4 |
3 files changed, 12 insertions, 1 deletions
diff --git a/arch/arc/include/asm/smp.h b/arch/arc/include/asm/smp.h index 5ea4cf8cd1a8..133c867d15af 100644 --- a/arch/arc/include/asm/smp.h +++ b/arch/arc/include/asm/smp.h @@ -48,6 +48,8 @@ extern int smp_ipi_irq_setup(int cpu, int irq); * @init_early_smp: A SMP specific h/w block can init itself * Could be common across platforms so not covered by * mach_desc->init_early() + * @init_irq_cpu: Called for each core so SMP h/w block driver can do + * any needed setup per cpu (e.g. IPI request) * @cpu_kick: For Master to kickstart a cpu (optionally at a PC) * @ipi_send: To send IPI to a @cpu * @ips_clear: To clear IPI received at @irq @@ -55,6 +57,7 @@ extern int smp_ipi_irq_setup(int cpu, int irq); struct plat_smp_ops { const char *info; void (*init_early_smp)(void); + void (*init_irq_cpu)(int cpu); void (*cpu_kick)(int cpu, unsigned long pc); void (*ipi_send)(int cpu); void (*ipi_clear)(int irq); diff --git a/arch/arc/kernel/irq.c b/arch/arc/kernel/irq.c index 1dd8f2685afc..2ee226546c6a 100644 --- a/arch/arc/kernel/irq.c +++ b/arch/arc/kernel/irq.c @@ -10,6 +10,7 @@ #include <linux/interrupt.h> #include <linux/irqchip.h> #include <asm/mach_desc.h> +#include <asm/smp.h> /* * Late Interrupt system init called from start_kernel for Boot CPU only @@ -27,7 +28,10 @@ void __init init_IRQ(void) irqchip_init(); #ifdef CONFIG_SMP - /* Master CPU can initialize it's side of IPI */ + /* a SMP H/w block could do IPI IRQ request here */ + if (plat_smp_ops.init_irq_cpu) + plat_smp_ops.init_irq_cpu(smp_processor_id()); + if (machine_desc->init_cpu_smp) machine_desc->init_cpu_smp(smp_processor_id()); #endif diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c index 35ee18f1de58..580587805fa3 100644 --- a/arch/arc/kernel/smp.c +++ b/arch/arc/kernel/smp.c @@ -131,6 +131,10 @@ void start_kernel_secondary(void) pr_info("## CPU%u LIVE ##: Executing Code...\n", cpu); + /* Some SMP H/w setup - for each cpu */ + if (plat_smp_ops.init_irq_cpu) + plat_smp_ops.init_irq_cpu(cpu); + if (machine_desc->init_cpu_smp) machine_desc->init_cpu_smp(cpu); |