1/* $NetBSD: mmu_subr.s,v 1.2 2024/01/09 07:28:26 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 2023 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) 1980, 1990, 1993 34 * The Regents of the University of California. 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 * from: Utah $Hdr: locore.s 1.66 92/12/22$ 65 * 66 * @(#)locore.s 8.6 (Berkeley) 5/27/94 67 */ 68 69/* 70 * void mmu_load_urp(paddr_t urp); 71 * 72 * Load the user root pointer into the MMU. A version is provided 73 * for each supported MMU type. 74 * 75 * We keep the HP MMU versions of these routines here, as well, 76 * even though they'll only ever be used on the hp300. 77 */ 78 79#include "opt_m68k_arch.h" 80 81#include <machine/asm.h> 82 83#include "assym.h" 84 85 .file "mmu_subr.s" 86 .text 87 88#if defined(M68K_MMU_MOTOROLA) 89#if defined(M68020) || defined(M68030) 90 .data 91/* 92 * protorp is set up to initialize the Supervisor Root Pointer. 93 * pmap_init() will re-configure it to load the CPU Root Pointer. 94 */ 95GLOBAL(protorp) 96 .long MMU51_SRP_BITS,0 | prototype CPU root pointer 97 98 .text 99ENTRY_NOPROFILE(mmu_load_urp51) 100 movl %sp@(4),%d0 | get root table PA argument 101 lea _C_LABEL(protorp),%a0 | CRP prototype 102 movl %d0,%a0@(4) | set new root table PA 103 pflusha | flush ATC 104 pmove %a0@,%crp | load CRP register 105 movl #CACHE_CLR,%d0 106 movc %d0,%cacr | invalidate caches 107 rts 108#endif /* M68020 || M68030 */ 109 110#if defined(M68040) || defined(M68060) 111#if defined(M68060) 112ENTRY_NOPROFILE(mmu_load_urp60) 113 movc %cacr,%d0 114 orl #IC60_CUBC,%d0 | clear user branch cache entries 115 movc %d0,%cacr 116 /* FALLTHROUGH */ 117#endif /* M68060 */ 118ENTRY_NOPROFILE(mmu_load_urp40) 119 movl %sp@(4),%d0 | get root table PA argument 120 .word 0xf518 |pflusha | flush ATC 121 .long 0x4e7b0806 |movc %d0,%urp | load the URP register 122 rts 123#endif /* M68040 || M68060 */ 124#endif /* M68K_MMU_MOTOROLA */ 125 126#if defined(M68K_MMU_HP) 127ENTRY_NOPROFILE(mmu_load_urp20hp) 128 movl #CACHE_CLR,%d0 129 movc %d0,%cacr | invalidate caches 130 movl _C_LABEL(MMUbase),%a0 131 movl %a0@(MMUTBINVAL),%d1 | invalidate TLB 132 tstl _C_LABEL(ectype) | have an external VAC? 133 jle 1f | no, skip 134 andl #~MMU_CEN,%a0@(MMUCMD) | toggle cache enable 135 orl #MMU_CEN,%a0@(MMUCMD) | to clear data cache 1361: movl %sp@(4),%d0 | get root table PA argument 137 moveq #PGSHIFT,%d1 138 lsrl %d1,%d0 | convert to page frame number 139 movl %d0,%a0@(MMUUSTP) | load to USTP register 140 rts 141#endif /* M68K_MMU_HP */ 142