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powerpc/85xx: issue 15 EOI after core reset for FSL CoreNet devices

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This is listed as a requirement for Freescale CoreNet based devices  (e.g
p4080ds with MPIC v4.x) after issuing a core reset to properly clear pending
interrupts.

Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Matthew McClintock 2011-10-26 13:46:57 -05:00 committed by Kumar Gala
parent cfadd83852
commit 44f16fcf2f
1 changed files with 10 additions and 0 deletions
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10
arch/powerpc/sysdev/mpic.c
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@ -1748,6 +1748,7 @@ void mpic_reset_core(int cpu)
struct mpic *mpic = mpic_primary; struct mpic *mpic = mpic_primary;
u32 pir; u32 pir;
int cpuid = get_hard_smp_processor_id(cpu); int cpuid = get_hard_smp_processor_id(cpu);
int i;
/* Set target bit for core reset */ /* Set target bit for core reset */
pir = mpic_read(mpic->gregs, MPIC_INFO(GREG_PROCESSOR_INIT)); pir = mpic_read(mpic->gregs, MPIC_INFO(GREG_PROCESSOR_INIT));
@ -1759,6 +1760,15 @@ void mpic_reset_core(int cpu)
pir &= ~(1 << cpuid); pir &= ~(1 << cpuid);
mpic_write(mpic->gregs, MPIC_INFO(GREG_PROCESSOR_INIT), pir); mpic_write(mpic->gregs, MPIC_INFO(GREG_PROCESSOR_INIT), pir);
mpic_read(mpic->gregs, MPIC_INFO(GREG_PROCESSOR_INIT)); mpic_read(mpic->gregs, MPIC_INFO(GREG_PROCESSOR_INIT));
/* Perform 15 EOI on each reset core to clear pending interrupts.
* This is required for FSL CoreNet based devices */
if (mpic->flags & MPIC_FSL) {
for (i = 0; i < 15; i++) {
_mpic_write(mpic->reg_type, &mpic->cpuregs[cpuid],
MPIC_CPU_EOI, 0);
}
}
} }
#endif /* CONFIG_SMP */ #endif /* CONFIG_SMP */