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