/* $NetBSD: pmap_bootstrap.c,v 1.14 2026/04/12 03:41:55 thorpej Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1991 Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)pmap.c 7.5 (Berkeley) 5/10/91 */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: pmap_bootstrap.c,v 1.14 2026/04/12 03:41:55 thorpej Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/proc.h> #include <uvm/uvm.h> #include <machine/pte.h> #include <machine/cpu.h> #include <machine/vmparam.h> #include <m68k/cacheops.h> #include <amiga/amiga/memlist.h> extern paddr_t avail_start; extern paddr_t avail_end; extern paddr_t msgbufpa; u_long noncontig_enable; extern paddr_t z2mem_start; extern vaddr_t reserve_dumppages(vaddr_t); /* * All those kernel PT submaps that BSD is so fond of */ void *CADDR1, *CADDR2; char *vmmap; /* * Bootstrap the system enough to run with virtual memory. * * This is called after mapping has already been enabled * and just syncs the pmap module with what has already been done. */ void __attribute__((no_instrument_function)) pmap_bootstrap(paddr_t firstaddr, paddr_t loadaddr) { vaddr_t va; int i; struct boot_memseg *sp, *esp; paddr_t fromads, toads; fromads = firstaddr; toads = maxmem << PGSHIFT; /* XXX: allow for msgbuf */ toads -= m68k_round_page(MSGBUFSIZE); msgbufpa = toads; /* * first segment of memory is always the one loadbsd found * for loading the kernel into. */ uvmexp.pagesize = NBPG; uvm_md_init(); /* * May want to check if first segment is Zorro-II? */ uvm_page_physload(atop(fromads), atop(toads), atop(fromads), atop(toads), VM_FREELIST_DEFAULT); sp = memlist->m_seg; esp = sp + memlist->m_nseg; i = 1; for (; noncontig_enable && sp < esp; sp++) { if ((sp->ms_attrib & MEMF_FAST) == 0) continue; /* skip if not FastMem */ if (firstaddr >= sp->ms_start && firstaddr < sp->ms_start + sp->ms_size) continue; /* skip kernel segment */ if (sp->ms_size == 0) continue; /* skip zero size segments */ fromads = sp->ms_start; toads = sp->ms_start + sp->ms_size; #ifdef DEBUG_A4000 /* * My A4000 doesn't seem to like Zorro II memory - this * hack is to skip the motherboard memory and use the * Zorro II memory. Only for trying to debug the problem. * Michael L. Hitch */ if (toads == 0x08000000) continue; /* skip A4000 motherboard mem */ #endif /* * Deal with Zorro II memory stolen for DMA bounce buffers. * This needs to be handled better. * * XXX is: disabled. This is handled now in amiga_init.c * by removing the stolen memory from the memlist. * * XXX is: enabled again, but check real size and position. * We check z2mem_start is in this segment, and set its end * to the z2mem_start. * */ if ((fromads <= z2mem_start) && (toads > z2mem_start)) toads = z2mem_start; uvm_page_physload(atop(fromads), atop(toads), atop(fromads), atop(toads), (fromads & 0xff000000) ? VM_FREELIST_DEFAULT : VM_FREELIST_ZORROII); physmem += (toads - fromads) / PAGE_SIZE; ++i; if (noncontig_enable == 1) break; /* Only two segments enabled */ } avail_start = firstaddr; avail_end = toads; virtual_end = VM_MAX_KERNEL_ADDRESS; /* * Allocate all the submaps we need */ #define SYSMAP(c, v, n) \ v = (c)va; va += ((n)*PAGE_SIZE); va = virtual_avail; SYSMAP(void * ,CADDR1 ,1 ) SYSMAP(void * ,CADDR2 ,1 ) SYSMAP(void * ,vmmap ,1 ) SYSMAP(void * ,msgbufaddr ,btoc(m68k_round_page(MSGBUFSIZE)) ) DCIS(); virtual_avail = reserve_dumppages(va); }
