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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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29
arch/sparc/kernel/sun4d_smp.c
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@@ -50,10 +50,9 @@ static inline void show_leds(int cpuid)
"i" (ASI_M_CTL));
}
void __cpuinit smp4d_callin(void)
void __cpuinit sun4d_cpu_pre_starting(void *arg)
{
int cpuid = hard_smp_processor_id();
unsigned long flags;
/* Show we are alive */
cpu_leds[cpuid] = 0x6;
@@ -61,26 +60,20 @@ void __cpuinit smp4d_callin(void)
/* Enable level15 interrupt, disable level14 interrupt for now */
cc_set_imsk((cc_get_imsk() & ~0x8000) | 0x4000);
}
local_ops->cache_all();
local_ops->tlb_all();
void __cpuinit sun4d_cpu_pre_online(void *arg)
{
unsigned long flags;
int cpuid;
notify_cpu_starting(cpuid);
/*
* Unblock the master CPU _only_ when the scheduler state
cpuid = hard_smp_processor_id();
/* Unblock the master CPU _only_ when the scheduler state
* of all secondary CPUs will be up-to-date, so after
* the SMP initialization the master will be just allowed
* to call the scheduler code.
*/
/* Get our local ticker going. */
register_percpu_ce(cpuid);
calibrate_delay();
smp_store_cpu_info(cpuid);
local_ops->cache_all();
local_ops->tlb_all();
/* Allow master to continue. */
sun4d_swap((unsigned long *)&cpu_callin_map[cpuid], 1);
local_ops->cache_all();
local_ops->tlb_all();
@@ -106,16 +99,12 @@ void __cpuinit smp4d_callin(void)
local_ops->cache_all();
local_ops->tlb_all();
local_irq_enable(); /* We don't allow PIL 14 yet */
while (!cpumask_test_cpu(cpuid, &smp_commenced_mask))
barrier();
spin_lock_irqsave(&sun4d_imsk_lock, flags);
cc_set_imsk(cc_get_imsk() & ~0x4000); /* Allow PIL 14 as well */
spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
set_cpu_online(cpuid, true);
}
/*