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omap4: hotplug: Add basic CPU hotplug support

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This patch adds cpu hotplug support for OMAP4430. Only CPU inactive
state is supported as a low power state in the basic hot-plug support

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Santosh Shilimkar
2010-08-02 13:18:19 +03:00
committed by Tony Lindgren
parent 3f9eaf0984
commit 7d35b8d09f
4 changed files with 89 additions and 1 deletions
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3
arch/arm/mach-omap2/omap-smp.c
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@@ -73,9 +73,10 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* the AuxCoreBoot1 register is updated with cpu state
* A barrier is added to ensure that write buffer is drained
*/
omap_modify_auxcoreboot0(0x200, 0x0);
omap_modify_auxcoreboot0(0x200, 0xfffffdff);
flush_cache_all();
smp_wmb();
smp_cross_call(cpumask_of(cpu));
/*
* Now the secondary core is starting up let it run its