diff options
| author | Matthew McClintock <msm@freescale.com> | 2011-10-26 13:46:57 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-11-03 13:12:27 -0500 |
| commit | 44f16fcf2fba79cffb268d8f3c1f744efefa5dc9 (patch) | |
| tree | 536077de8f29c6b1502c528e1b00702d4f9559c3 /arch | |
| parent | cfadd83852eb6b9a015bc1ea396b98f395f073e0 (diff) | |
| download | linux-44f16fcf2fba79cffb268d8f3c1f744efefa5dc9.tar.bz2 | |
powerpc/85xx: issue 15 EOI after core reset for FSL CoreNet devices
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index 9678081dc4e2..0842c6f8a3e6 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -1748,6 +1748,7 @@ void mpic_reset_core(int cpu) struct mpic *mpic = mpic_primary; u32 pir; int cpuid = get_hard_smp_processor_id(cpu); + int i; /* Set target bit for core reset */ pir = mpic_read(mpic->gregs, MPIC_INFO(GREG_PROCESSOR_INIT)); @@ -1759,6 +1760,15 @@ void mpic_reset_core(int cpu) pir &= ~(1 << cpuid); mpic_write(mpic->gregs, MPIC_INFO(GREG_PROCESSOR_INIT), pir); 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 */ |