1 /* $NetBSD: evbppc_machdep.c,v 1.15 2021/08/03 09:25:43 rin Exp $ */ 2 3 /* 4 * Copyright 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 40 * Copyright (C) 1995, 1996 TooLs GmbH. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by TooLs GmbH. 54 * 4. The name of TooLs GmbH may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 61 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 62 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 63 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 64 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 65 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 66 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: evbppc_machdep.c,v 1.15 2021/08/03 09:25:43 rin Exp $"); 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/mount.h> 75 #include <sys/vnode.h> 76 77 #include <uvm/uvm_extern.h> 78 79 #include <machine/cpu.h> 80 #include <sys/bus.h> 81 #include <machine/pmap.h> 82 83 /* 84 * Global variables used here and there. 85 */ 86 struct vm_map *phys_map = NULL; 87 88 /* 89 * XXX This should probably be in autoconf. 90 */ 91 char machine[] = MACHINE; 92 char machine_arch[] = MACHINE_ARCH; 93 94 int fake_mapiodev = 1; 95 96 /* 97 * mapiodev: 98 * 99 * Allocate vm space and mapin the I/O address. Use reserved TLB 100 * mapping if one is found. 101 */ 102 void * 103 mapiodev(paddr_t pa, psize_t len, bool prefetchable) 104 { 105 void *p; 106 paddr_t faddr; 107 vaddr_t taddr, va; 108 int off; 109 110 KASSERT(!prefetchable); 111 112 /* 113 * See if we have reserved TLB entry for the pa. This needs to be 114 * true for console as we can't use uvm during early bootstrap. 115 */ 116 p = ppc4xx_tlb_mapiodev(pa, len); 117 if (p != NULL) 118 return (p); 119 120 if (fake_mapiodev) 121 panic("mapiodev: no TLB entry reserved for %llx+%llx", 122 (long long)pa, (long long)len); 123 124 faddr = trunc_page(pa); 125 off = pa - faddr; 126 len = round_page(off + len); 127 va = taddr = uvm_km_alloc(kernel_map, len, 0, UVM_KMF_VAONLY); 128 129 if (va == 0) 130 return NULL; 131 132 for (; len > 0; len -= PAGE_SIZE) { 133 pmap_kenter_pa(taddr, faddr, 134 VM_PROT_READ|VM_PROT_WRITE, PMAP_NOCACHE); 135 faddr += PAGE_SIZE; 136 taddr += PAGE_SIZE; 137 } 138 pmap_update(pmap_kernel()); 139 return (void *)(va + off); 140 } 141 142 void 143 unmapiodev(vaddr_t va, vsize_t sz) 144 { 145 /* Nothing to do for reserved (ie. not uvm_km_alloc'd) mappings. */ 146 if (va < VM_MIN_KERNEL_ADDRESS || va > VM_MAX_KERNEL_ADDRESS) 147 return; 148 149 sz = round_page((va & PAGE_MASK) + sz); 150 va = trunc_page(va); 151 152 pmap_kremove(va, sz); 153 uvm_km_free(kernel_map, va, sz, UVM_KMF_VAONLY); 154 } 155
Indexes created Sun Oct 25 00:26:45 UTC 2026