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Commit 8c24594d authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: generic clockevent broadcast support. 



This hooks up GENERIC_CLOCKEVENTS_BROADCAST and a dummy local timer,
which we call in to from the timer IPI when no other local timer is
provided.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 6f52707e

arch/sh/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -66,6 +66,9 @@ config GENERIC_TIME 
config GENERIC_CLOCKEVENTS

	def_bool n



config GENERIC_CLOCKEVENTS_BROADCAST

	bool



config GENERIC_LOCKBREAK

	def_bool y

	depends on SMP && PREEMPT
@@ -323,6 +326,7 @@ config CPU_SUBTYPE_SHX3 
	select ARCH_SPARSEMEM_ENABLE

	select SYS_SUPPORTS_NUMA

	select SYS_SUPPORTS_SMP

	select GENERIC_CLOCKEVENTS_BROADCAST



# SH4AL-DSP Processor Support

arch/sh/include/asm/smp.h

+3 −0
Original line number Diff line number Diff line
@@ -33,6 +33,9 @@ enum { 
void smp_message_recv(unsigned int msg);

void smp_timer_broadcast(cpumask_t mask);



void local_timer_interrupt(void);

void local_timer_setup(unsigned int cpu);



void plat_smp_setup(void);

void plat_prepare_cpus(unsigned int max_cpus);

int plat_smp_processor_id(void);

arch/sh/kernel/smp.c

+5 −2
Original line number Diff line number Diff line
@@ -84,9 +84,12 @@ asmlinkage void __cpuinit start_secondary(void) 


	local_irq_enable();



	cpu = smp_processor_id();



	/* Enable local timers */

	local_timer_setup(cpu);

	calibrate_delay();



	cpu = smp_processor_id();

	smp_store_cpu_info(cpu);



	cpu_set(cpu, cpu_online_map);
@@ -195,7 +198,7 @@ void smp_timer_broadcast(cpumask_t mask) 
static void ipi_timer(void)

{

	irq_enter();

	/* XXX ... */

	local_timer_interrupt();

	irq_exit();

}

arch/sh/kernel/time_32.c

+7 −2
Original line number Diff line number Diff line 
/*

 *  arch/sh/kernel/time.c

 *  arch/sh/kernel/time_32.c

 *

 *  Copyright (C) 1999  Tetsuya Okada & Niibe Yutaka

 *  Copyright (C) 2000  Philipp Rumpf <prumpf@tux.org>

 *  Copyright (C) 2002 - 2007  Paul Mundt

 *  Copyright (C) 2002 - 2008  Paul Mundt

 *  Copyright (C) 2002  M. R. Brown  <mrbrown@linux-sh.org>

 *

 *  Some code taken from i386 version.
@@ -16,6 +16,7 @@ 
#include <linux/timex.h>

#include <linux/sched.h>

#include <linux/clockchips.h>

#include <linux/smp.h>

#include <asm/clock.h>

#include <asm/rtc.h>

#include <asm/timer.h>
@@ -260,6 +261,10 @@ void __init time_init(void) 
	sys_timer = get_sys_timer();

	printk(KERN_INFO "Using %s for system timer\n", sys_timer->name);



#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST

	local_timer_setup(smp_processor_id());

#endif



	if (sys_timer->ops->read)

		clocksource_sh.read = sys_timer->ops->read;

arch/sh/kernel/timers/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -8,3 +8,4 @@ obj-$(CONFIG_SH_TMU) += timer-tmu.o 
obj-$(CONFIG_SH_MTU2)		+= timer-mtu2.o

obj-$(CONFIG_SH_CMT)		+= timer-cmt.o



obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)	+= timer-broadcast.o