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sparc32: refactor smp boot

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Introduce a common smp_callin() function to call
from trampoline_32.S.
Add platform specific functions to handle the
platform details.

This is in preparation for a patch that will
unify the smp boot stuff for all architectures.
sparc32 was significantly different to warrant
this patch in preparation.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sam Ravnborg
2013-02-15 15:52:06 +01:00
committed by David S. Miller
parent 76968ad2ea
commit f9fd3488f6
6 changed files with 133 additions and 79 deletions
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86
arch/sparc/kernel/smp_32.c
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@@ -20,6 +20,7 @@
#include <linux/seq_file.h>
#include <linux/cache.h>
#include <linux/delay.h>
#include <linux/cpu.h>
#include <asm/ptrace.h>
#include <linux/atomic.h>
@@ -32,8 +33,10 @@
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/cpudata.h>
#include <asm/timer.h>
#include <asm/leon.h>
#include "kernel.h"
#include "irq.h"
volatile unsigned long cpu_callin_map[NR_CPUS] __cpuinitdata = {0,};
@@ -294,6 +297,89 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle)
return ret;
}
void __cpuinit arch_cpu_pre_starting(void *arg)
{
local_ops->cache_all();
local_ops->tlb_all();
switch(sparc_cpu_model) {
case sun4m:
sun4m_cpu_pre_starting(arg);
break;
case sun4d:
sun4d_cpu_pre_starting(arg);
break;
case sparc_leon:
leon_cpu_pre_starting(arg);
break;
default:
BUG();
}
}
void __cpuinit arch_cpu_pre_online(void *arg)
{
unsigned int cpuid = hard_smp_processor_id();
register_percpu_ce(cpuid);
calibrate_delay();
smp_store_cpu_info(cpuid);
local_ops->cache_all();
local_ops->tlb_all();
switch(sparc_cpu_model) {
case sun4m:
sun4m_cpu_pre_online(arg);
break;
case sun4d:
sun4d_cpu_pre_online(arg);
break;
case sparc_leon:
leon_cpu_pre_online(arg);
break;
default:
BUG();
}
}
void __cpuinit sparc_start_secondary(void *arg)
{
unsigned int cpu;
/*
* SMP booting is extremely fragile in some architectures. So run
* the cpu initialization code first before anything else.
*/
arch_cpu_pre_starting(arg);
preempt_disable();
cpu = smp_processor_id();
/* Invoke the CPU_STARTING notifier callbacks */
notify_cpu_starting(cpu);
arch_cpu_pre_online(arg);
/* Set the CPU in the cpu_online_mask */
set_cpu_online(cpu, true);
/* Enable local interrupts now */
local_irq_enable();
wmb();
cpu_idle();
/* We should never reach here! */
BUG();
}
void __cpuinit smp_callin(void)
{
sparc_start_secondary(NULL);
}
void smp_bogo(struct seq_file *m)
{
int i;