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      1 /*	$NetBSD: xen_mainbus.c,v 1.10 2021/08/07 16:19:08 thorpej Exp $	*/
      2 /*	NetBSD: mainbus.c,v 1.19 2017/05/23 08:54:39 nonaka Exp 	*/
      3 /*	NetBSD: mainbus.c,v 1.53 2003/10/27 14:11:47 junyoung Exp 	*/
      4 
      5 /*
      6  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *      This product includes software developed by Christopher G. Demetriou
     19  *	for the NetBSD Project.
     20  * 4. The name of the author may not be used to endorse or promote products
     21  *    derived from this software without specific prior written permission
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: xen_mainbus.c,v 1.10 2021/08/07 16:19:08 thorpej Exp $");
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/device.h>
     41 
     42 #include <sys/bus.h>
     43 
     44 #include "hypervisor.h"
     45 #include "pci.h"
     46 
     47 #include "opt_xen.h"
     48 #include "opt_mpbios.h"
     49 #include "opt_pcifixup.h"
     50 
     51 #include "acpica.h"
     52 #include "ioapic.h"
     53 
     54 #include "ipmi.h"
     55 
     56 #include <machine/cpuvar.h>
     57 #include <machine/i82093var.h>
     58 
     59 #include <xen/xen.h>
     60 #include <xen/hypervisor.h>
     61 
     62 #if NIPMI > 0
     63 #include <x86/ipmivar.h>
     64 #endif
     65 
     66 #if NPCI > 0
     67 #include <dev/pci/pcivar.h>
     68 #if NACPICA > 0
     69 #include <dev/acpi/acpivar.h>
     70 #include <xen/mpacpi.h>
     71 #endif /* NACPICA > 0 */
     72 #ifdef MPBIOS
     73 #include <machine/mpbiosvar.h>
     74 #endif /* MPBIOS */
     75 #ifdef PCI_BUS_FIXUP
     76 #include <arch/x86/pci/pci_bus_fixup.h>
     77 #ifdef PCI_ADDR_FIXUP
     78 #include <arch/x86/pci/pci_addr_fixup.h>
     79 #endif
     80 #endif
     81 
     82 #if defined(XENPV) && (defined(MPBIOS) || NACPICA > 0)
     83 struct mp_bus *mp_busses;
     84 int mp_nbus;
     85 struct mp_intr_map *mp_intrs;
     86 int mp_nintr;
     87 
     88 int mp_isa_bus = -1;	/* XXX */
     89 int mp_eisa_bus = -1;	/* XXX */
     90 
     91 #ifdef MPVERBOSE
     92 int mp_verbose = 1;
     93 #else /* MPVERBOSE */
     94 int mp_verbose = 0;
     95 #endif /* MPVERBOSE */
     96 #endif /* defined(MPBIOS) || NACPICA > 0 */
     97 #endif /* NPCI > 0 */
     98 
     99 extern bool acpi_present;
    100 extern bool mpacpi_active;
    101 
    102 void	xen_mainbus_attach(device_t, device_t, void *);
    103 static int	xen_mainbus_print(void *, const char *);
    104 
    105 union xen_mainbus_attach_args {
    106 	const char *mba_busname;		/* first elem of all */
    107 	struct cpu_attach_args mba_caa;
    108 #if NHYPERVISOR > 0
    109 	struct hypervisor_attach_args mba_haa;
    110 #endif
    111 #if NIPMI > 0
    112 	struct ipmi_attach_args mba_ipmi;
    113 #endif
    114 };
    115 
    116 /*
    117  * Attach the mainbus.
    118  */
    119 void
    120 xen_mainbus_attach(device_t parent, device_t self, void *aux)
    121 {
    122 	union xen_mainbus_attach_args mba;
    123 
    124 	switch(vm_guest) {
    125 	case VM_GUEST_XENPV:
    126 #if NIPMI > 0 && defined(XENPV)
    127 		memset(&mba.mba_ipmi, 0, sizeof(mba.mba_ipmi));
    128 		mba.mba_ipmi.iaa_iot = x86_bus_space_io;
    129 		mba.mba_ipmi.iaa_memt = x86_bus_space_mem;
    130 		if (ipmi_probe(&mba.mba_ipmi))
    131 			config_found(self, &mba.mba_ipmi, NULL,
    132 			    CFARGS(.iattr = "ipmibus"));
    133 #endif
    134 	/* FALLTHROUGH */
    135 	case VM_GUEST_XENPVH:
    136 	case VM_GUEST_XENPVHVM:
    137 		mba.mba_haa.haa_busname = "hypervisor";
    138 		config_found(self, &mba.mba_haa, xen_mainbus_print,
    139 		    CFARGS(.iattr = "hypervisorbus"));
    140 		break;
    141 	default:
    142 		return;
    143 	}
    144 
    145 	if (vm_guest == VM_GUEST_XENPV) {
    146 		/* save/restore for Xen */
    147 		if (!pmf_device_register(self, NULL, NULL))
    148 			aprint_error_dev(self,
    149 			    "couldn't establish power handler\n");
    150 	}
    151 }
    152 
    153 static int
    154 xen_mainbus_print(void *aux, const char *pnp)
    155 {
    156 	union xen_mainbus_attach_args *mba = aux;
    157 
    158 	if (pnp)
    159 		aprint_normal("%s at %s", mba->mba_busname, pnp);
    160 	return UNCONF;
    161 }
    162