Commit a8a69301 authored Jan 15, 2013 by Hiroshi Doyu Committed by Stephen Warren Jan 28, 2013

ARM: tegra: Use DT /cpu node to detect number of CPU core



SCU based detection only works with Cortex-A9 MP and it doesn't
support ones with multiple clusters. The only way to detect number of
CPU core correctly is with DT /cpu node.

Tegra SoCs decided to use DT detection as the only way and to not use
SCU based detection at all. Even if DT /cpu node based detection
fails, it continues with a single core

Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

parent 7d19a34a

arch/arm/mach-tegra/platsmp.c

+0 −15

Original line number	Diff line number	Diff line
		@@ -143,23 +143,8 @@ done:
		return status;
		}

		/*
		* Initialise the CPU possible map early - this describes the CPUs
		* which may be present or become present in the system.
		*/
		static void __init tegra_smp_init_cpus(void)
		{
		unsigned int i, ncores = scu_get_core_count(scu_base);

		if (ncores > nr_cpu_ids) {
		pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
		ncores, nr_cpu_ids);
		ncores = nr_cpu_ids;
		}

		for (i = 0; i < ncores; i++)
		set_cpu_possible(i, true);

		set_smp_cross_call(gic_raise_softirq);
		}

Admin message