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      1 /*	$NetBSD: machdep.c,v 1.147 2026/04/28 03:29:10 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1998 Darrin B. Jewell
      5  * Copyright (c) 1988 University of Utah.
      6  * Copyright (c) 1982, 1986, 1990, 1993
      7  *	The Regents of the University of California.  All rights reserved.
      8  *
      9  * This code is derived from software contributed to Berkeley by
     10  * the Systems Programming Group of the University of Utah Computer
     11  * Science Department.
     12  *
     13  * Redistribution and use in source and binary forms, with or without
     14  * modification, are permitted provided that the following conditions
     15  * are met:
     16  * 1. Redistributions of source code must retain the above copyright
     17  *    notice, this list of conditions and the following disclaimer.
     18  * 2. Redistributions in binary form must reproduce the above copyright
     19  *    notice, this list of conditions and the following disclaimer in the
     20  *    documentation and/or other materials provided with the distribution.
     21  * 3. Neither the name of the University nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  *
     37  * from: Utah $Hdr: machdep.c 1.74 92/12/20$
     38  *
     39  *	@(#)machdep.c	8.10 (Berkeley) 4/20/94
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.147 2026/04/28 03:29:10 thorpej Exp $");
     44 
     45 #include "opt_ddb.h"
     46 #include "opt_kgdb.h"
     47 #include "opt_modular.h"
     48 
     49 #include <sys/param.h>
     50 #include <sys/systm.h>
     51 #include <sys/signalvar.h>
     52 #include <sys/kernel.h>
     53 #include <sys/proc.h>
     54 #include <sys/buf.h>
     55 #include <sys/reboot.h>
     56 #include <sys/conf.h>
     57 #include <sys/file.h>
     58 #include <sys/device.h>
     59 #include <sys/mbuf.h>
     60 #include <sys/msgbuf.h>
     61 #include <sys/ioctl.h>
     62 #include <sys/tty.h>
     63 #include <sys/mount.h>
     64 #include <sys/exec.h>
     65 #include <sys/core.h>
     66 #include <sys/kcore.h>
     67 #include <sys/vnode.h>
     68 #include <sys/syscallargs.h>
     69 #include <sys/ksyms.h>
     70 #include <sys/module.h>
     71 #ifdef KGDB
     72 #include <sys/kgdb.h>
     73 #endif
     74 #include <sys/boot_flag.h>
     75 #include <sys/cpu.h>
     76 
     77 #include <uvm/uvm_extern.h>
     78 
     79 #ifdef DDB
     80 #include <machine/db_machdep.h>
     81 #include <ddb/db_access.h>
     82 #include <ddb/db_sym.h>
     83 #include <ddb/db_extern.h>
     84 #endif
     85 
     86 #ifdef KGDB
     87 /* Is zs configured in? */
     88 #include "zsc.h"
     89 #if (NZSC > 0)
     90 #include <next68k/dev/zs_cons.h>
     91 #endif
     92 #endif
     93 
     94 #include <sys/sysctl.h>
     95 
     96 #include <machine/cpu.h>
     97 #include <machine/bus.h>
     98 #include <machine/reg.h>
     99 #include <machine/pcb.h>
    100 #include <machine/psl.h>
    101 #include <machine/pte.h>
    102 #include <machine/vmparam.h>
    103 #include <dev/cons.h>
    104 
    105 #include <machine/kcore.h>	/* XXX should be pulled in by sys/kcore.h */
    106 
    107 #include <next68k/dev/intiovar.h>
    108 #include <next68k/next68k/isr.h>
    109 #include <next68k/next68k/nextrom.h>
    110 #include <next68k/next68k/rtc.h>
    111 #include <m68k/seglist.h>
    112 
    113 #include <dev/mm.h>
    114 
    115 #include "ksyms.h"
    116 
    117 int nsym;
    118 char *ssym;
    119 extern char *esym;
    120 
    121 #define	MAXMEM	64*1024	/* XXX - from cmap.h */
    122 
    123 extern	u_int lowram;
    124 
    125 /* functions called from locore.s */
    126 void machine_init(paddr_t);
    127 
    128 /*
    129  * Default to 33MHz 68040.
    130  */
    131 int	delay_divisor = delay_divisor_est40(33);
    132 
    133 /****************************************************************/
    134 
    135 struct pmap_bootmap machine_bootmap[] = {
    136 [PMBM_I_INTIO]	=	{ .pmbm_vaddr_ptr = &intiobase,
    137 			  .pmbm_paddr     = INTIOBASE,
    138 			  .pmbm_size      = INTIOSIZE,
    139 			  .pmbm_flags     = PMBM_F_CI },
    140 
    141 [PMBM_I_FB]	=	{ .pmbm_vaddr_ptr = &fbbase,
    142 			  .pmbm_paddr     = 0,	/* filled in by... */
    143 			  .pmbm_size      = 0,	/* ...next68k_bootargs() */
    144 			  .pmbm_flags     = PMBM_F_CWT },
    145 
    146 			{ .pmbm_vaddr = -1 },
    147 };
    148 
    149 /*
    150  * Early initialization, before main() is called.
    151  */
    152 void
    153 machine_init(paddr_t nextpa)
    154 {
    155 	machine_init_common(nextpa);
    156 
    157 	{
    158 		char *p = rom_boot_arg;
    159 		boothowto = 0;
    160 		if (*p++ == '-') {
    161 			for (;*p;p++)
    162 				BOOT_FLAG(*p, boothowto);
    163 		}
    164 	}
    165 }
    166 
    167 /*
    168  * Console initialization: called early on from main,
    169  * before vm init or startup.  Do enough configuration
    170  * to choose and initialize a console.
    171  */
    172 void
    173 consinit(void)
    174 {
    175 	static int init = 0;
    176 
    177 	/*
    178 	 * Generic console: sys/dev/cons.c
    179 	 *	Initializes either ite or ser as console.
    180 	 *	Can be called from locore.s and init_main.c.
    181 	 */
    182 
    183 	if (!init) {
    184 		cninit();
    185 #if defined(KGDB) && (NZSC > 0)
    186 		zs_kgdb_init();
    187 #endif
    188 #if NKSYMS || defined(DDB) || defined(MODULAR)
    189 		/* Initialize kernel symbol table, if compiled in. */
    190 		ksyms_addsyms_elf(nsym, ssym, esym);
    191 #endif
    192 		if (boothowto & RB_KDB) {
    193 #if defined(KGDB)
    194 			kgdb_connect(1);
    195 #elif defined(DDB)
    196 			Debugger();
    197 #endif
    198 		}
    199 
    200 		init = 1;
    201 	}
    202 }
    203 
    204 void
    205 machine_set_model(void)
    206 {
    207 	extern int turbo;
    208 	const char *shape_str = "cube";
    209 	const char *color_str = iscolor ? " Color" : "";
    210 	const char *turbo_str = turbo ? " Turbo" : "";
    211 
    212 	switch (rom_machine_type) {
    213 	case NeXT_WARP9:	/* 68040 25MHz NeXTstation */
    214 	case NeXT_WARP9C:	/* 68040 25MHz NeXTstation Color */
    215 	case NeXT_TURBO_MONO:	/* 68040 33MHz NeXTstation */
    216 	case NeXT_TURBO_COLOR:	/* 68040 33MHz NeXTstation Color */
    217 		shape_str = "station";
    218 		/* FALLTHROUGH */
    219 	case NeXT_CUBE:		/* 68030 25MHz NeXTcube */
    220 	case NeXT_X15:		/* 68040 25MHz NeXTcubr */
    221 	case NeXT_CUBE_TURBO:	/* 68040 33MHz NeXTcube */
    222 		cpu_setmodel("NeXT%s%s%s", shape_str, color_str, turbo_str);
    223 		break;
    224 
    225 	default:
    226 		cpu_setmodel("NeXT machine type %d", rom_machine_type);
    227 		break;
    228 	}
    229 
    230 	switch (cputype) {
    231 	case CPU_68040:
    232 		cpuspeed_khz = (turbo ? 33 : 25) * 1000;
    233 		delay_divisor = delay_divisor_est40(cpuspeed_khz / 1000);
    234 		break;
    235 	case CPU_68030:
    236 		cpuspeed_khz = 25*1000;
    237 		delay_divisor = delay_divisor_est(cpuspeed_khz / 1000);
    238 		break;
    239 	default:
    240 		printf("\nunknown cputype %d\n", cputype);
    241 		panic("startup");
    242 	}
    243 }
    244 
    245 /*
    246  * machine dependent system variables.
    247  */
    248 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup")
    249 {
    250 
    251 	sysctl_createv(clog, 0, NULL, NULL,
    252 		       CTLFLAG_PERMANENT,
    253 		       CTLTYPE_NODE, "machdep", NULL,
    254 		       NULL, 0, NULL, 0,
    255 		       CTL_MACHDEP, CTL_EOL);
    256 
    257 #if 0
    258 	sysctl_createv(clog, 0, NULL, NULL,
    259 		       CTLFLAG_PERMANENT,
    260 		       CTLTYPE_STRUCT, "console_device", NULL,
    261 		       sysctl_consdev, 0, NULL, sizeof(dev_t),
    262 		       CTL_MACHDEP, CPU_CONSDEV, CTL_EOL);
    263 #endif
    264 }
    265 
    266 void
    267 machine_powerdown(void)
    268 {
    269 	poweroff();
    270 }
    271 
    272 void
    273 machine_halt(void)
    274 {
    275 	monbootflag = 0x2d680000;	/* "-h" halts instead of reboot */
    276 	machine_reboot(RB_HALT, NULL);	/* args are ignored */
    277 }
    278 
    279 /*
    280  * Level 7 interrupts can be caused by the keyboard or parity errors.
    281  */
    282 int
    283 nmihand(void *frame)
    284 {
    285 	static int innmihand;	/* simple mutex */
    286 
    287 	/* Prevent unwanted recursion. */
    288 	if (innmihand)
    289 		return 0;
    290 	innmihand = 1;
    291 
    292 	printf("Got a NMI");
    293 
    294 	if (!INTR_OCCURRED(NEXT_I_NMI)) {
    295 		printf("But NMI isn't set in intrstat!\n");
    296 	}
    297 	INTR_DISABLE(NEXT_I_NMI);
    298 
    299 #if defined(DDB)
    300 	printf(": entering debugger\n");
    301 	Debugger();
    302 	printf("continuing after NMI\n");
    303 #elif defined(KGDB)
    304 	kgdb_connect(1);
    305 #else
    306 	printf(": ignoring\n");
    307 #endif /* DDB */
    308 
    309 	INTR_ENABLE(NEXT_I_NMI);
    310 
    311 	innmihand = 0;
    312 
    313 	return 0;
    314 }
    315