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

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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>
This commit is contained in:
Hiroshi Doyu 2013-01-15 10:13:12 +02:00 committed by Stephen Warren
parent 7d19a34a89
commit a8a6930157
1 changed files with 0 additions and 15 deletions
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15
arch/arm/mach-tegra/platsmp.c
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@ -143,23 +143,8 @@ done:
return status; 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) 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); set_smp_cross_call(gic_raise_softirq);
} }