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      1 /*	$NetBSD: consinit.c,v 1.18 2023/10/17 12:07:42 bouyer Exp $	*/
      2 /*	NetBSD: consinit.c,v 1.4 2004/03/13 17:31:34 bjh21 Exp 	*/
      3 
      4 /*
      5  * Copyright (c) 1998
      6  *	Matthias Drochner.  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  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  *
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 __KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.18 2023/10/17 12:07:42 bouyer Exp $");
     32 
     33 #include "opt_kgdb.h"
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/device.h>
     38 #include <sys/bus.h>
     39 #include <machine/bootinfo.h>
     40 #include <arch/x86/include/genfb_machdep.h>
     41 
     42 #include "xencons.h"
     43 #include "vga.h"
     44 #include "ega.h"
     45 #include "pcdisplay.h"
     46 #include "genfb.h"
     47 #if (NVGA > 0) || (NEGA > 0) || (NPCDISPLAY > 0)
     48 #include <dev/ic/mc6845reg.h>
     49 #include <dev/ic/pcdisplayvar.h>
     50 #if (NVGA > 0)
     51 #include <dev/ic/vgareg.h>
     52 #include <dev/ic/vgavar.h>
     53 #endif
     54 #if (NEGA > 0)
     55 #include <dev/isa/egavar.h>
     56 #endif
     57 #if (NPCDISPLAY > 0)
     58 #include <dev/isa/pcdisplayvar.h>
     59 #endif
     60 #endif
     61 
     62 #include "pckbc.h"
     63 #if (NPCKBC > 0)
     64 #include <dev/isa/isareg.h>
     65 #include <dev/ic/i8042reg.h>
     66 #include <dev/ic/pckbcvar.h>
     67 #endif
     68 #include "pckbd.h" /* for pckbc_machdep_cnattach */
     69 
     70 #include "ukbd.h"
     71 #if (NUKBD > 0)
     72 #include <dev/usb/ukbdvar.h>
     73 #endif
     74 
     75 #if (NGENFB > 0)
     76 #include <dev/wsfb/genfbvar.h>
     77 #endif
     78 
     79 #include "opt_xen.h"
     80 #if (XEN > 0)
     81 #include <xen/xen.h>
     82 #include <dev/pckbport/pckbportvar.h>
     83 #include <xen/hypervisor.h>
     84 #include "xen_def_cons.h"
     85 #endif
     86 
     87 #include "com.h"
     88 #if (NCOM > 0)
     89 #include <sys/termios.h>
     90 #include <dev/ic/comreg.h>
     91 #include <dev/ic/comvar.h>
     92 #endif
     93 
     94 #ifndef CONSDEVNAME
     95 #define CONSDEVNAME "pc"
     96 #endif
     97 
     98 #if (NCOM > 0)
     99 #ifndef CONADDR
    100 #define CONADDR 0x3f8
    101 #endif
    102 #ifndef CONSPEED
    103 #define CONSPEED TTYDEF_SPEED
    104 #endif
    105 #ifndef CONMODE
    106 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
    107 #endif
    108 int comcnmode = CONMODE;
    109 #endif /* NCOM */
    110 
    111 const struct btinfo_console default_consinfo = {
    112 	{0, 0},
    113 	CONSDEVNAME,
    114 #if (NCOM > 0)
    115 	CONADDR, CONSPEED
    116 #else
    117 	0, 0
    118 #endif
    119 };
    120 
    121 #ifdef KGDB
    122 #ifndef KGDB_DEVNAME
    123 #define KGDB_DEVNAME "com"
    124 #endif
    125 const char kgdb_devname[] = KGDB_DEVNAME;
    126 
    127 #if (NCOM > 0)
    128 #ifndef KGDB_DEVADDR
    129 #define KGDB_DEVADDR 0x3f8
    130 #endif
    131 int comkgdbaddr = KGDB_DEVADDR;
    132 #ifndef KGDB_DEVRATE
    133 #define KGDB_DEVRATE TTYDEF_SPEED
    134 #endif
    135 int comkgdbrate = KGDB_DEVRATE;
    136 #ifndef KGDB_DEVMODE
    137 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
    138 #endif
    139 int comkgdbmode = KGDB_DEVMODE;
    140 #endif /* NCOM */
    141 
    142 #endif /* KGDB */
    143 
    144 /*
    145  * consinit:
    146  * initialize the system console.
    147  * XXX - shouldn't deal with this initted thing, but then,
    148  * it shouldn't be called from init386 either.
    149  */
    150 void
    151 consinit(void)
    152 {
    153 	static int initted = 0;
    154 	union xen_cmdline_parseinfo xcp;
    155 #if (NGENFB > 0)
    156         const struct btinfo_framebuffer *fbinfo = NULL;
    157 #endif
    158 
    159 
    160 	if (initted) {
    161 		return;
    162 	}
    163 
    164 	xen_early_console();
    165 
    166 #if (NGENFB > 0) && defined(DOM0OPS)
    167 	if (xendomain_is_dom0())
    168 		fbinfo = xen_genfb_getbtinfo();
    169 #endif
    170 
    171 	initted = 1;
    172 	xen_parse_cmdline(XEN_PARSE_CONSOLE, &xcp);
    173 
    174 #if (NVGA > 0) || (NGENFB > 0)
    175 	if (xendomain_is_privileged()) {
    176 #ifdef CONS_OVERRIDE
    177 		if (strcmp(default_consinfo.devname, "tty0") == 0 ||
    178 		    strcmp(default_consinfo.devname, "pc") == 0) {
    179 #else
    180 		if (strcmp(xcp.xcp_console, "tty0") == 0 || /* linux name */
    181 		    strcmp(xcp.xcp_console, "pc") == 0) { /* NetBSD name */
    182 #endif /* CONS_OVERRIDE */
    183 			int error;
    184 
    185 #if (NGENFB > 0)
    186 			if (fbinfo && fbinfo->physaddr > 0) {
    187 				if (x86_genfb_cnattach() == -1) {
    188 					initted = 0; /* defer */
    189 					return;
    190 				}
    191 				genfb_cnattach();
    192 				goto dokbd;
    193 			} else {
    194 				genfb_disable();
    195 			}
    196 #endif
    197 			vga_cnattach(x86_bus_space_io, x86_bus_space_mem,
    198 			    -1, 1);
    199 #if (NGENFB > 0)
    200 dokbd:
    201 #endif
    202 			error = ENODEV;
    203 
    204 #if (NPCKBC > 0)
    205 			error = pckbc_cnattach(x86_bus_space_io, IO_KBD, KBCMDP,
    206 			    PCKBC_KBD_SLOT, 0);
    207 #endif
    208 #if (NUKBD > 0)
    209 			if (error)
    210 				error = ukbd_cnattach();
    211 #endif
    212 			if (error)
    213 				printf("WARNING: no console keyboard, "
    214 				    "error=%d\n", error);
    215 			return;
    216 		}
    217 	}
    218 #endif /* NVGA */
    219 #if NXENCONS > 0
    220 	xenconscn_attach();
    221 	return;
    222 #endif /* NXENCONS */
    223 	panic("consinit: no console");
    224 }
    225 
    226 #ifdef KGDB
    227 void
    228 kgdb_port_init(void)
    229 {
    230 #if (NCOM > 0)
    231 	if(!strcmp(kgdb_devname, "com")) {
    232 		bus_space_tag_t tag = x86_bus_space_io;
    233 
    234 		com_kgdb_attach(tag, comkgdbaddr, comkgdbrate, COM_FREQ,
    235 		    COM_TYPE_NORMAL, comkgdbmode);
    236 	}
    237 #endif
    238 }
    239 #endif
    240