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topology.h

#ifndef _ASM_POWERPC_TOPOLOGY_H
#define _ASM_POWERPC_TOPOLOGY_H
#ifdef __KERNEL__


struct sys_device;
struct device_node;

#ifdef CONFIG_NUMA

#include <asm/mmzone.h>

static inline int cpu_to_node(int cpu)
{
      return numa_cpu_lookup_table[cpu];
}

#define parent_node(node)     (node)

static inline cpumask_t node_to_cpumask(int node)
{
      return numa_cpumask_lookup_table[node];
}

static inline int node_to_first_cpu(int node)
{
      cpumask_t tmp;
      tmp = node_to_cpumask(node);
      return first_cpu(tmp);
}

int of_node_to_nid(struct device_node *device);

struct pci_bus;
#ifdef CONFIG_PCI
extern int pcibus_to_node(struct pci_bus *bus);
#else
static inline int pcibus_to_node(struct pci_bus *bus)
{
      return -1;
}
#endif

#define pcibus_to_cpumask(bus)      (pcibus_to_node(bus) == -1 ? \
                              CPU_MASK_ALL : \
                              node_to_cpumask(pcibus_to_node(bus)) \
                        )

/* sched_domains SD_NODE_INIT for PPC64 machines */
#define SD_NODE_INIT (struct sched_domain) {          \
      .span             = CPU_MASK_NONE,  \
      .parent                 = NULL,                 \
      .child                  = NULL,                 \
      .groups                 = NULL,                 \
      .min_interval           = 8,              \
      .max_interval           = 32,             \
      .busy_factor            = 32,             \
      .imbalance_pct          = 125,                  \
      .cache_nice_tries = 1,              \
      .busy_idx         = 3,              \
      .idle_idx         = 1,              \
      .newidle_idx            = 2,              \
      .wake_idx         = 1,              \
      .flags                  = SD_LOAD_BALANCE \
                        | SD_BALANCE_EXEC \
                        | SD_BALANCE_NEWIDLE    \
                        | SD_WAKE_IDLE          \
                        | SD_SERIALIZE          \
                        | SD_WAKE_BALANCE,      \
      .last_balance           = jiffies,        \
      .balance_interval = 1,              \
      .nr_balance_failed      = 0,              \
}

extern void __init dump_numa_cpu_topology(void);

extern int sysfs_add_device_to_node(struct sys_device *dev, int nid);
extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid);

#else

static inline int of_node_to_nid(struct device_node *device)
{
      return 0;
}

static inline void dump_numa_cpu_topology(void) {}

static inline int sysfs_add_device_to_node(struct sys_device *dev, int nid)
{
      return 0;
}

static inline void sysfs_remove_device_from_node(struct sys_device *dev,
                                    int nid)
{
}

#endif /* CONFIG_NUMA */

#include <asm-generic/topology.h>

#ifdef CONFIG_SMP
#include <asm/cputable.h>
#define smt_capable()         (cpu_has_feature(CPU_FTR_SMT))

#ifdef CONFIG_PPC64
#include <asm/smp.h>

#define topology_thread_siblings(cpu)     (per_cpu(cpu_sibling_map, cpu))
#define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu))
#define topology_core_id(cpu)       (cpu_to_core_id(cpu))
#endif
#endif

#endif /* __KERNEL__ */
#endif      /* _ASM_POWERPC_TOPOLOGY_H */

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