ARC: [Review] Multi-platform image #7: SMP common code to use callbacks

This again is for switch from singleton platform SMP API to
multi-platform paradigm

Platform code is not yet setup to populate the callbacks, that happens
in next commit

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Vineet Gupta
2013-01-18 15:12:26 +05:30
parent fc7943d29e
commit 10b1271875
2 changed files with 28 additions and 24 deletions

View File

@@ -37,6 +37,8 @@
arch_spinlock_t smp_atomic_ops_lock = __ARCH_SPIN_LOCK_UNLOCKED;
arch_spinlock_t smp_bitops_lock = __ARCH_SPIN_LOCK_UNLOCKED;
struct plat_smp_ops plat_smp_ops;
/* XXX: per cpu ? Only needed once in early seconday boot */
struct task_struct *secondary_idle_tsk;
@@ -105,6 +107,11 @@ void __attribute__((weak)) arc_platform_smp_wait_to_boot(int cpu)
" b 1b \n");
}
const char *arc_platform_smp_cpuinfo(void)
{
return plat_smp_ops.info;
}
/*
* The very first "C" code executed by secondary
* Called from asm stub in head.S
@@ -156,7 +163,8 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
pr_info("Idle Task [%d] %p", cpu, idle);
pr_info("Trying to bring up CPU%u ...\n", cpu);
arc_platform_smp_wakeup_cpu(cpu,
if (plat_smp_ops.cpu_kick)
plat_smp_ops.cpu_kick(cpu,
(unsigned long)first_lines_of_secondary);
/* wait for 1 sec after kicking the secondary */
@@ -225,7 +233,8 @@ static void ipi_send_msg(const struct cpumask *callmap, enum ipi_msg_type msg)
}
/* Call the platform specific cross-CPU call function */
arc_platform_ipi_send(callmap);
if (plat_smp_ops.ipi_send)
plat_smp_ops.ipi_send((void *)callmap);
local_irq_restore(flags);
}
@@ -299,7 +308,8 @@ irqreturn_t do_IPI(int irq, void *dev_id)
struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
unsigned long ops;
arc_platform_ipi_clear(cpu, irq);
if (plat_smp_ops.ipi_clear)
plat_smp_ops.ipi_clear(cpu, irq);
/*
* XXX: is this loop really needed