| Message ID | 1350393709-23546-3-git-send-email-lorenzo.pieralisi@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Oct 16, 2012 at 02:21:46PM +0100, Lorenzo Pieralisi wrote: > As soon as the device tree is unflattened the cpu logical to physical > mapping is carried out in setup_arch to build a proper array of MPIDR and > corresponding logical indexes. > > The mapping could have been carried out using the flattened DT blob and > related primitives, but since the mapping is not needed by early boot > code it can safely be executed when the device tree has been uncompressed to > its tree data structure. > > This patch adds the arm_dt_init_cpu maps() function call in setup_arch(). > > If the kernel is not compiled with DT support the function is empty and > no logical mapping takes place through it; the mapping carried out in > smp_setup_processor_id() is left unchanged. > If DT is supported the mapping created in smp_setup_processor_id() is overriden. > The DT mapping also sets the possible cpus mask, hence platform > code need not set it again in the respective smp_init_cpus() functions. > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > --- > arch/arm/kernel/setup.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c > index da1d1aa..20c530b 100644 > --- a/arch/arm/kernel/setup.c > +++ b/arch/arm/kernel/setup.c > @@ -758,6 +758,7 @@ void __init setup_arch(char **cmdline_p) > > unflatten_device_tree(); > > + arm_dt_init_cpu_maps(); > #ifdef CONFIG_SMP > if (is_smp()) { > smp_set_ops(mdesc->smp); > -- > 1.7.12 Acked-by: Will Deacon <will.deacon@arm.com> Will
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index da1d1aa..20c530b 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -758,6 +758,7 @@ void __init setup_arch(char **cmdline_p) unflatten_device_tree(); + arm_dt_init_cpu_maps(); #ifdef CONFIG_SMP if (is_smp()) { smp_set_ops(mdesc->smp);
As soon as the device tree is unflattened the cpu logical to physical mapping is carried out in setup_arch to build a proper array of MPIDR and corresponding logical indexes. The mapping could have been carried out using the flattened DT blob and related primitives, but since the mapping is not needed by early boot code it can safely be executed when the device tree has been uncompressed to its tree data structure. This patch adds the arm_dt_init_cpu maps() function call in setup_arch(). If the kernel is not compiled with DT support the function is empty and no logical mapping takes place through it; the mapping carried out in smp_setup_processor_id() is left unchanged. If DT is supported the mapping created in smp_setup_processor_id() is overriden. The DT mapping also sets the possible cpus mask, hence platform code need not set it again in the respective smp_init_cpus() functions. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> --- arch/arm/kernel/setup.c | 1 + 1 file changed, 1 insertion(+)