diff options
| -rw-r--r-- | sys/kern/init_smp.c | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/sys/kern/init_smp.c b/sys/kern/init_smp.c index f335666..166d72b 100644 --- a/sys/kern/init_smp.c +++ b/sys/kern/init_smp.c @@ -22,7 +22,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id: init_smp.c,v 1.2 1997/04/28 00:24:00 fsmp Exp $ + * $Id: init_smp.c,v 1.3 1997/05/01 14:18:05 peter Exp $ */ #include "opt_smp.h" @@ -55,9 +55,51 @@ #include <sys/user.h> -int smp_active = 0; /* is the secondary allowed to run? */ +#define NEW_STYLE_NOT + +int smp_active = 0; /* are the APs allowed to run? */ + +#if defined(NEW_STYLE) + +/* a shadow copy for diddling */ +static int xsmp_active = 0; + +static int +sysctl_xmp SYSCTL_HANDLER_ARGS +{ + int error; + + /* load the shadow with the current value */ + xsmp_active = smp_active; + + /* update the shadow */ + error = sysctl_handle_int( oidp, oidp->oid_arg1, oidp->oid_arg2, req ); + if (!error) { + /* check the shadow for a legal range */ + if ((xsmp_active < 1) || (xsmp_active > mp_ncpus)) { + xsmp_active = smp_active; /* bad, back to old */ + error = EOPNOTSUPP; + } + else { + smp_active = xsmp_active; /* good, update */ + } + } + else { + xsmp_active = smp_active; /* ??? */ + } + + return error; +} + +SYSCTL_PROC(_kern, OID_AUTO, smp_active, CTLTYPE_INT | CTLFLAG_RW, + &xsmp_active, 0, &sysctl_xmp, "I", ""); + +#else /* NEW_STYLE_NOT */ + SYSCTL_INT(_kern, OID_AUTO, smp_active, CTLFLAG_RW, &smp_active, 0, ""); +#endif /* NEW_STYLE */ + int smp_cpus = 0; /* how many cpu's running */ SYSCTL_INT(_kern, OID_AUTO, smp_cpus, CTLFLAG_RD, &smp_cpus, 0, ""); |
