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      1 /*	$NetBSD: autoconf.c,v 1.30 2023/12/20 00:40:43 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997, 1999
      5  *	Matthias Drochner.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  *
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.30 2023/12/20 00:40:43 thorpej Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/buf.h>
     35 #include <sys/conf.h>
     36 #include <sys/device.h>
     37 #include <sys/disklabel.h>
     38 #include <sys/mount.h>
     39 #include <sys/queue.h>
     40 #include <sys/reboot.h>
     41 #include <sys/tty.h>
     42 #include <sys/kernel.h>
     43 
     44 #include <uvm/uvm_extern.h>
     45 
     46 #include <machine/autoconf.h>
     47 #include <machine/vmparam.h>
     48 #include <machine/cpu.h>
     49 #include <machine/pmap.h>
     50 #include <machine/pte.h>
     51 #include <m68k/cacheops.h>
     52 
     53 #include <cesfic/cesfic/isr.h>
     54 
     55 u_int	bootdev;
     56 
     57 struct evcnt evcnt_fpsp_unimp, evcnt_fpsp_unsupp;
     58 
     59 int	mainbusmatch(device_t, cfdata_t, void *);
     60 void	mainbusattach(device_t, device_t, void *);
     61 int	mainbussearch(device_t, cfdata_t, const int *, void *);
     62 
     63 CFATTACH_DECL_NEW(mainbus, 0,
     64     mainbusmatch, mainbusattach, NULL, NULL);
     65 
     66 int
     67 mainbusmatch(device_t parent, cfdata_t match, void *aux)
     68 {
     69 	static bool mainbus_matched;
     70 
     71 	/* Allow only one instance. */
     72 	if (mainbus_matched)
     73 		return (0);
     74 
     75 	mainbus_matched = true;
     76 	return (1);
     77 }
     78 
     79 void
     80 mainbusattach(device_t parent, device_t self, void *aux)
     81 {
     82 
     83 	printf("\n");
     84 
     85 #ifdef FPSP /* XXX this shouldn't be here but in a "cpu" node */
     86 	evcnt_attach(self, "fpuni", &evcnt_fpsp_unimp);
     87 	evcnt_attach(self, "fpund", &evcnt_fpsp_unsupp);
     88 #endif
     89 
     90 	/* Search for and attach children. */
     91 	config_search(self, NULL,
     92 	    CFARGS(.search = mainbussearch));
     93 }
     94 
     95 int
     96 mainbussearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
     97 {
     98 
     99 	if (config_probe(parent, cf, NULL))
    100 		config_attach(parent, cf, NULL, NULL, CFARGS_NONE);
    101 	return (0);
    102 }
    103 
    104 int
    105 mainbus_map(u_long physaddr, int size, int cacheable, void ** virtaddr)
    106 {
    107 
    108 	u_long pa, endpa;
    109 	vm_offset_t va;
    110 
    111 	pa = m68k_trunc_page(physaddr);
    112 	endpa = m68k_round_page(physaddr + size);
    113 
    114 #ifdef DIAGNOSTIC
    115 	if (endpa <= pa)
    116 		panic("bus_mem_add_mapping: overflow");
    117 #endif
    118 
    119 	va = uvm_km_alloc(kernel_map, endpa - pa, 0, UVM_KMF_VAONLY);
    120 	if (va == 0)
    121 		return (ENOMEM);
    122 
    123 	*virtaddr = (void*)(va + (physaddr & PGOFSET));
    124 	for (; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
    125 		pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, 0);
    126 		if (!cacheable) {
    127 			pt_entry_t *pte = kvtopte(va);
    128 			*pte |= PG_CI;
    129 			*pte &= ~PG_CCB;
    130 		}
    131 	}
    132 	TBIAS();
    133 
    134 	return (0);
    135 }
    136 
    137 void
    138 cpu_configure(void)
    139 {
    140 
    141 	isrinit();
    142 
    143 	(void)splhigh();
    144 	if (config_rootfound("mainbus", NULL) == NULL)
    145 		panic("no mainbus found");
    146 
    147 	(void)spl0();
    148 }
    149 
    150 void
    151 cpu_rootconf(void)
    152 {
    153 	rootconf();
    154 }
    155