1 /* $NetBSD: pmap_bootstrap.c,v 1.11 2023/12/20 00:40:42 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 /* 33 * Copyright (c) 1991 Regents of the University of California. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * the Systems Programming Group of the University of Utah Computer 38 * Science Department. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)pmap.c 7.5 (Berkeley) 5/10/91 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: pmap_bootstrap.c,v 1.11 2023/12/20 00:40:42 thorpej Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/proc.h> 73 74 #include <uvm/uvm.h> 75 76 #include <machine/pte.h> 77 #include <machine/cpu.h> 78 #include <machine/vmparam.h> 79 80 #include <m68k/cacheops.h> 81 82 #include <amiga/amiga/memlist.h> 83 84 extern paddr_t avail_start; 85 extern paddr_t avail_end; 86 87 extern paddr_t msgbufpa; 88 89 u_long noncontig_enable; 90 91 extern paddr_t z2mem_start; 92 93 extern vaddr_t reserve_dumppages(vaddr_t); 94 95 /* 96 * All those kernel PT submaps that BSD is so fond of 97 */ 98 void *CADDR1, *CADDR2; 99 char *vmmap; 100 101 /* 102 * Bootstrap the system enough to run with virtual memory. 103 * 104 * This is called after mapping has already been enabled 105 * and just syncs the pmap module with what has already been done. 106 */ 107 void 108 pmap_bootstrap(paddr_t firstaddr, paddr_t loadaddr) 109 { 110 vaddr_t va; 111 int i; 112 struct boot_memseg *sp, *esp; 113 paddr_t fromads, toads; 114 115 fromads = firstaddr; 116 toads = maxmem << PGSHIFT; 117 118 /* XXX: allow for msgbuf */ 119 toads -= m68k_round_page(MSGBUFSIZE); 120 msgbufpa = toads; 121 /* 122 * first segment of memory is always the one loadbsd found 123 * for loading the kernel into. 124 */ 125 126 uvmexp.pagesize = NBPG; 127 uvm_md_init(); 128 129 /* 130 * May want to check if first segment is Zorro-II? 131 */ 132 uvm_page_physload(atop(fromads), atop(toads), 133 atop(fromads), atop(toads), VM_FREELIST_DEFAULT); 134 135 sp = memlist->m_seg; 136 esp = sp + memlist->m_nseg; 137 i = 1; 138 for (; noncontig_enable && sp < esp; sp++) { 139 if ((sp->ms_attrib & MEMF_FAST) == 0) 140 continue; /* skip if not FastMem */ 141 if (firstaddr >= sp->ms_start && 142 firstaddr < sp->ms_start + sp->ms_size) 143 continue; /* skip kernel segment */ 144 if (sp->ms_size == 0) 145 continue; /* skip zero size segments */ 146 fromads = sp->ms_start; 147 toads = sp->ms_start + sp->ms_size; 148 #ifdef DEBUG_A4000 149 /* 150 * My A4000 doesn't seem to like Zorro II memory - this 151 * hack is to skip the motherboard memory and use the 152 * Zorro II memory. Only for trying to debug the problem. 153 * Michael L. Hitch 154 */ 155 if (toads == 0x08000000) 156 continue; /* skip A4000 motherboard mem */ 157 #endif 158 /* 159 * Deal with Zorro II memory stolen for DMA bounce buffers. 160 * This needs to be handled better. 161 * 162 * XXX is: disabled. This is handled now in amiga_init.c 163 * by removing the stolen memory from the memlist. 164 * 165 * XXX is: enabled again, but check real size and position. 166 * We check z2mem_start is in this segment, and set its end 167 * to the z2mem_start. 168 * 169 */ 170 if ((fromads <= z2mem_start) && (toads > z2mem_start)) 171 toads = z2mem_start; 172 173 uvm_page_physload(atop(fromads), atop(toads), 174 atop(fromads), atop(toads), (fromads & 0xff000000) ? 175 VM_FREELIST_DEFAULT : VM_FREELIST_ZORROII); 176 physmem += (toads - fromads) / PAGE_SIZE; 177 ++i; 178 if (noncontig_enable == 1) 179 break; /* Only two segments enabled */ 180 } 181 182 mem_size = physmem << PGSHIFT; 183 184 avail_start = firstaddr; 185 avail_end = toads; 186 187 virtual_end = VM_MAX_KERNEL_ADDRESS; 188 189 /* 190 * Allocate all the submaps we need 191 */ 192 #define SYSMAP(c, v, n) \ 193 v = (c)va; va += ((n)*PAGE_SIZE); 194 195 va = virtual_avail; 196 197 SYSMAP(void * ,CADDR1 ,1 ) 198 SYSMAP(void * ,CADDR2 ,1 ) 199 SYSMAP(void * ,vmmap ,1 ) 200 SYSMAP(void * ,msgbufaddr ,btoc(MSGBUFSIZE) ) 201 202 DCIS(); 203 204 virtual_avail = reserve_dumppages(va); 205 } 206
Indexes created Wed Sep 24 05:09:52 GMT 2025