Home | History | Annotate | Line # | Download | only in ia64
cpu.c revision 1.8 
      1 /*	$NetBSD: cpu.c,v 1.8 2010/05/17 11:46:19 kiyohara Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2006 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  *
      8  * Author:
      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: cpu.c,v 1.8 2010/05/17 11:46:19 kiyohara Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/proc.h>
     37 #include <sys/systm.h>
     38 #include <sys/device.h>
     39 #include <sys/kmem.h>
     40 
     41 #include <dev/acpi/acpica.h>
     42 #include <dev/acpi/acpivar.h>
     43 
     44 
     45 struct cpu_info cpu_info_primary __aligned(CACHE_LINE_SIZE);
     46 
     47 static int cpu_match(device_t, cfdata_t, void *);
     48 static void cpu_attach(device_t, device_t, void *);
     49 
     50 struct cpu_softc {
     51 	device_t sc_dev;		/* device tree glue */
     52 	struct cpu_info *sc_info;	/* pointer to CPU info */
     53 };
     54 
     55 CFATTACH_DECL_NEW(cpu, sizeof(struct cpu_softc),
     56     cpu_match, cpu_attach, NULL, NULL);
     57 
     58 
     59 static int
     60 cpu_match(device_t parent, cfdata_t match, void *aux)
     61 {
     62 
     63 	return 1;
     64 }
     65 
     66 static void
     67 cpu_attach(device_t parent, device_t self, void *aux)
     68 {
     69 	struct cpu_softc *sc = device_private(self);
     70 	ACPI_MADT_LOCAL_SAPIC *sapic = (ACPI_MADT_LOCAL_SAPIC *)aux;
     71 	struct cpu_info *ci;
     72 	uint64_t lid;
     73 	int id, eid;
     74 
     75 	aprint_naive("\n");
     76 	aprint_normal(": ProcessorID %d, Id %d, Eid %d%s\n",
     77 	    sapic->ProcessorId, sapic->Id, sapic->Eid,
     78 	    sapic->LapicFlags & ACPI_MADT_ENABLED ? "" : " (disabled)");
     79 
     80 	/* Get current CPU Id */
     81 	lid = ia64_get_lid();
     82 	id = (lid & 0x00000000ff000000) >> 24;
     83 	eid = (lid & 0x0000000000ff0000) >> 16;
     84 
     85 	sc->sc_dev = self;
     86 	if (id == sapic->Id && eid == sapic->Eid)
     87 		ci = curcpu();
     88 	else {
     89 		ci = (struct cpu_info *)kmem_zalloc(sizeof(*ci), KM_NOSLEEP);
     90 		if (ci == NULL) {
     91 			aprint_error_dev(self, "memory alloc failed\n");
     92 			return;
     93 		}
     94 	}
     95 	sc->sc_info = ci;
     96 
     97 	ci->ci_cpuid = sapic->ProcessorId;
     98 	ci->ci_intrdepth = -1;			/* need ? */
     99 	ci->ci_dev = self;
    100 
    101 	return;
    102 }
    103