Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 286130eb authored by Vineet Gupta's avatar Vineet Gupta
Browse files

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: default avatarVineet Gupta <vgupta@synopsys.com>
parent 8721a7f5

arch/arc/include/asm/smp.h

+3 −0
Original line number Diff line number Diff line
@@ -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);

arch/arc/kernel/irq.c

+5 −1
Original line number Diff line number Diff line
@@ -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

arch/arc/kernel/smp.c

+4 −0
Original line number Diff line number Diff line
@@ -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);