diff options
Diffstat (limited to 'sys/kern/subr_smp.c')
| -rw-r--r-- | sys/kern/subr_smp.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sys/kern/subr_smp.c b/sys/kern/subr_smp.c index b6fd97f..b3b81ac 100644 --- a/sys/kern/subr_smp.c +++ b/sys/kern/subr_smp.c @@ -48,10 +48,13 @@ __FBSDID("$FreeBSD$"); #include <machine/smp.h> +#ifdef SMP volatile u_int stopped_cpus; volatile u_int started_cpus; void (*cpustop_restartfunc)(void); +#endif + int mp_ncpus; volatile int smp_started; @@ -73,6 +76,7 @@ int smp_cpus = 1; /* how many cpu's running */ SYSCTL_INT(_kern_smp, OID_AUTO, cpus, CTLFLAG_RD, &smp_cpus, 0, "Number of CPUs online"); +#ifdef SMP /* Enable forwarding of a signal to a process running on a different CPU */ static int forward_signal_enabled = 1; SYSCTL_INT(_kern_smp, OID_AUTO, forward_signal_enabled, CTLFLAG_RW, @@ -331,3 +335,35 @@ smp_rendezvous(void (* setup_func)(void *), /* release lock */ mtx_unlock_spin(&smp_rv_mtx); } +#else /* !SMP */ + +/* + * Provide dummy SMP support for UP kernels. Modules that need to use SMP + * APIs will still work using this dummy support. + */ +static void +mp_setvariables_for_up(void *dummy) +{ + mp_ncpus = 1; + mp_maxid = PCPU_GET(cpuid); + all_cpus = PCPU_GET(cpumask); + KASSERT(PCPU_GET(cpuid) == 0, ("UP must have a CPU ID of zero")); +} +SYSINIT(cpu_mp_setvariables, SI_SUB_TUNABLES, SI_ORDER_FIRST, + mp_setvariables_for_up, NULL) + +void +smp_rendezvous(void (* setup_func)(void *), + void (* action_func)(void *), + void (* teardown_func)(void *), + void *arg) +{ + + if (setup_func != NULL) + setup_func(arg); + if (action_func != NULL) + action_func(arg); + if (teardown_func != NULL) + teardown_func(arg); +} +#endif /* SMP */ |
