diff options
Diffstat (limited to 'arch/powerpc/sysdev/mpic.c')
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index d5d3ff3d757e..0842c6f8a3e6 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -1285,13 +1285,11 @@ struct mpic * __init mpic_alloc(struct device_node *node, mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0)) | MPIC_GREG_GCONF_MCK); - /* Read feature register, calculate num CPUs and, for non-ISU - * MPICs, num sources as well. On ISU MPICs, sources are counted - * as ISUs are added + /* + * Read feature register. For non-ISU MPICs, num sources as well. On + * ISU MPICs, sources are counted as ISUs are added */ greg_feature = mpic_read(mpic->gregs, MPIC_INFO(GREG_FEATURE_0)); - mpic->num_cpus = ((greg_feature & MPIC_GREG_FEATURE_LAST_CPU_MASK) - >> MPIC_GREG_FEATURE_LAST_CPU_SHIFT) + 1; if (isu_size == 0) { if (flags & MPIC_BROKEN_FRR_NIRQS) mpic->num_sources = mpic->irq_count; @@ -1301,10 +1299,18 @@ struct mpic * __init mpic_alloc(struct device_node *node, >> MPIC_GREG_FEATURE_LAST_SRC_SHIFT) + 1; } + /* + * The MPIC driver will crash if there are more cores than we + * can initialize, so we may as well catch that problem here. + */ + BUG_ON(num_possible_cpus() > MPIC_MAX_CPUS); + /* Map the per-CPU registers */ - for (i = 0; i < mpic->num_cpus; i++) { - mpic_map(mpic, node, paddr, &mpic->cpuregs[i], - MPIC_INFO(CPU_BASE) + i * MPIC_INFO(CPU_STRIDE), + for_each_possible_cpu(i) { + unsigned int cpu = get_hard_smp_processor_id(i); + + mpic_map(mpic, node, paddr, &mpic->cpuregs[cpu], + MPIC_INFO(CPU_BASE) + cpu * MPIC_INFO(CPU_STRIDE), 0x1000); } @@ -1343,7 +1349,7 @@ struct mpic * __init mpic_alloc(struct device_node *node, } printk(KERN_INFO "mpic: Setting up MPIC \"%s\" version %s at %llx," " max %d CPUs\n", - name, vers, (unsigned long long)paddr, mpic->num_cpus); + name, vers, (unsigned long long)paddr, num_possible_cpus()); printk(KERN_INFO "mpic: ISU size: %d, shift: %d, mask: %x\n", mpic->isu_size, mpic->isu_shift, mpic->isu_mask); @@ -1742,6 +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)); @@ -1753,6 +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 */ |