| /*- |
| * ---------------------------------------------------------------------------- |
| * "THE BEER-WARE LICENSE" (Revision 42): |
| * <phk@FreeBSD.org> wrote this file. As long as you retain this notice you |
| * can do whatever you want with this stuff. If we meet some day, and you think |
| * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp |
| * ---------------------------------------------------------------------------- |
| * |
| * $FreeBSD$ |
| */ |
| |
| #ifndef _BSD_SYS_SMP_H_ |
| #define _BSD_SYS_SMP_H_ |
| |
| #ifdef _FREEBSD_KERNEL |
| |
| #ifndef LOCORE |
| |
| #ifdef SMP |
| |
| /* |
| * Topology of a NUMA or HTT system. |
| * |
| * The top level topology is an array of pointers to groups. Each group |
| * contains a bitmask of cpus in its group or subgroups. It may also |
| * contain a pointer to an array of child groups. |
| * |
| * The bitmasks at non leaf groups may be used by consumers who support |
| * a smaller depth than the hardware provides. |
| * |
| * The topology may be omitted by systems where all CPUs are equal. |
| */ |
| |
| struct cpu_group { |
| struct cpu_group *cg_parent; /* Our parent group. */ |
| struct cpu_group *cg_child; /* Optional children groups. */ |
| cpumask_t cg_mask; /* Mask of cpus in this group. */ |
| int8_t cg_count; /* Count of cpus in this group. */ |
| int8_t cg_children; /* Number of children groups. */ |
| int8_t cg_level; /* Shared cache level. */ |
| int8_t cg_flags; /* Traversal modifiers. */ |
| }; |
| |
| /* |
| * Defines common resources for CPUs in the group. The highest level |
| * resource should be used when multiple are shared. |
| */ |
| #define CG_SHARE_NONE 0 |
| #define CG_SHARE_L1 1 |
| #define CG_SHARE_L2 2 |
| #define CG_SHARE_L3 3 |
| |
| /* |
| * Behavior modifiers for load balancing and affinity. |
| */ |
| #define CG_FLAG_HTT 0x01 /* Schedule the alternate core last. */ |
| #define CG_FLAG_SMT 0x02 /* New age htt, less crippled. */ |
| #define CG_FLAG_THREAD (CG_FLAG_HTT | CG_FLAG_SMT) /* Any threading. */ |
| |
| /* |
| * Convenience routines for building topologies. |
| */ |
| struct cpu_group *smp_topo(void); |
| struct cpu_group *smp_topo_none(void); |
| struct cpu_group *smp_topo_1level(int l1share, int l1count, int l1flags); |
| struct cpu_group *smp_topo_2level(int l2share, int l2count, int l1share, |
| int l1count, int l1flags); |
| struct cpu_group *smp_topo_find(struct cpu_group *top, int cpu); |
| |
| extern void (*cpustop_restartfunc)(void); |
| extern int smp_active; |
| extern int smp_cpus; |
| extern volatile cpumask_t started_cpus; |
| extern volatile cpumask_t stopped_cpus; |
| extern cpumask_t idle_cpus_mask; |
| extern cpumask_t hlt_cpus_mask; |
| extern cpumask_t logical_cpus_mask; |
| #endif /* SMP */ |
| |
| extern u_int mp_maxid; |
| extern int mp_maxcpus; |
| extern int mp_ncpus; |
| extern volatile int smp_started; |
| |
| extern cpumask_t all_cpus; |
| |
| /* |
| * Macro allowing us to determine whether a CPU is absent at any given |
| * time, thus permitting us to configure sparse maps of cpuid-dependent |
| * (per-CPU) structures. |
| */ |
| #define CPU_ABSENT(x_cpu) ((all_cpus & (1 << (x_cpu))) == 0) |
| |
| #ifdef SMP |
| /* |
| * Machine dependent functions used to initialize MP support. |
| * |
| * The cpu_mp_probe() should check to see if MP support is present and return |
| * zero if it is not or non-zero if it is. If MP support is present, then |
| * cpu_mp_start() will be called so that MP can be enabled. This function |
| * should do things such as startup secondary processors. It should also |
| * setup mp_ncpus, all_cpus, and smp_cpus. It should also ensure that |
| * smp_active and smp_started are initialized at the appropriate time. |
| * Once cpu_mp_start() returns, machine independent MP startup code will be |
| * executed and a simple message will be output to the console. Finally, |
| * cpu_mp_announce() will be called so that machine dependent messages about |
| * the MP support may be output to the console if desired. |
| * |
| * The cpu_setmaxid() function is called very early during the boot process |
| * so that the MD code may set mp_maxid to provide an upper bound on CPU IDs |
| * that other subsystems may use. If a platform is not able to determine |
| * the exact maximum ID that early, then it may set mp_maxid to MAXCPU - 1. |
| */ |
| struct thread; |
| |
| struct cpu_group *cpu_topo(void); |
| void cpu_mp_announce(void); |
| int cpu_mp_probe(void); |
| void cpu_mp_setmaxid(void); |
| void cpu_mp_start(void); |
| |
| void forward_signal(struct thread *); |
| int restart_cpus(cpumask_t); |
| int stop_cpus(cpumask_t); |
| int stop_cpus_hard(cpumask_t); |
| #if defined(__amd64__) |
| int suspend_cpus(cpumask_t); |
| #endif |
| void smp_rendezvous_action(void); |
| extern struct mtx smp_ipi_mtx; |
| |
| #endif /* SMP */ |
| void smp_no_rendevous_barrier(void *); |
| void smp_rendezvous(void (*)(void *), |
| void (*)(void *), |
| void (*)(void *), |
| void *arg); |
| void smp_rendezvous_cpus(cpumask_t, |
| void (*)(void *), |
| void (*)(void *), |
| void (*)(void *), |
| void *arg); |
| #endif /* !LOCORE */ |
| #endif /* _FREEBSD_KERNEL */ |
| #endif /* _BSD_SYS_SMP_H_ */ |