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      1 /* $NetBSD: ipi_bebox.c,v 1.1 2012/10/20 14:53:37 kiyohara Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Tim Rightnour
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: ipi_bebox.c,v 1.1 2012/10/20 14:53:37 kiyohara Exp $");
     34 
     35 #include <sys/atomic.h>
     36 #include <sys/cpu.h>
     37 
     38 #include <powerpc/pic/picvar.h>
     39 #include <powerpc/pic/ipivar.h>
     40 
     41 
     42 static void bebox_send_ipi(cpuid_t, uint32_t);
     43 static void bebox_establish_ipi(int, int, void *);
     44 
     45 void
     46 setup_bebox_ipi(void)
     47 {
     48 
     49 	ipiops.ppc_send_ipi = bebox_send_ipi;
     50 	ipiops.ppc_establish_ipi = bebox_establish_ipi;
     51 	ipiops.ppc_ipi_vector = IPI_VECTOR;
     52 }
     53 
     54 static void
     55 bebox_send_ipi(cpuid_t target, uint32_t mesg)
     56 {
     57 	struct cpu_info * const ci = curcpu();
     58 	int i;
     59 
     60 	switch (target) {
     61 	case IPI_DST_ALL:
     62 	case IPI_DST_NOTME:
     63 		for (i = 0; i < ncpu; i++) {
     64 			struct cpu_info * const dst_ci = cpu_lookup(i);
     65 
     66 			if (target == IPI_DST_ALL || dst_ci != ci) {
     67 				atomic_or_32(&dst_ci->ci_pending_ipis, mesg);
     68 			}
     69 		}
     70 		break;
     71 
     72 	default:
     73 	    {
     74 		struct cpu_info * const dst_ci = cpu_lookup(target);
     75 
     76 		atomic_or_32(&dst_ci->ci_pending_ipis, mesg);
     77 		break;
     78 	    }
     79 	}
     80 }
     81 
     82 static void
     83 bebox_establish_ipi(int type, int level, void *ih_args)
     84 {
     85 	/* XXXXX: nothing? */
     86 }
     87