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SMP code initializes the FPU of APs.

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Suggested by:     Bruce Evans <bde@FreeBSD.ORG>
This commit is contained in:
Steve Passe 1997-07-21 17:03:22 +00:00
parent f6af917bec
commit b9f415331e
1 changed files with 14 additions and 4 deletions
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18
sys/kern/init_smp.c
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@ -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 1.5 1997/07/14 20:49:14 smp Exp smp $
* $Id: init_smp.c,v 1.11 1997/07/15 02:46:37 fsmp Exp $
*/
#include "opt_smp.h"
@ -45,6 +45,10 @@
#include <machine/cpu.h>
#include <machine/smp.h>
#include <machine/smptests.h> /** IGNORE_IDLEPROCS, TEST_TEST1 */
#include <machine/specialreg.h>
#ifndef CR0_EM
#define CR0_EM 0x00000004 /* EMulate non-NPX coproc. (trap ESC only) */
#endif
#include <vm/vm.h>
#include <vm/vm_param.h>
@ -179,7 +183,7 @@ secondary_main()
cpu_starting = cpuid;
smp_cpus++;
/* build our map of 'other' CPUs */
/* Build our map of 'other' CPUs. */
other_cpus = all_cpus & ~(1 << cpuid);
printf("SMP: AP CPU #%d LAUNCHED!! Starting Scheduling...\n",
@ -191,10 +195,16 @@ secondary_main()
lapic.tpr = 0xff;
ipi_test1();
}
#else
#endif /** TEST_TEST1 */
/* Setup the FPU. */
temp = rcr0();
temp &= ~(CR0_EM);
temp |= (CR0_MP | CR0_NE | CR0_TS);
load_cr0(temp);
curproc = NULL; /* ensure no context to save */
cpu_switch(curproc); /* start first process */
#endif /** TEST_TEST1 */
panic("switch returned!");
}