1 /* $NetBSD: obio_space.c,v 1.6 2003/07/15 00:25:05 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe 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 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/bus.h> 44 #include <sys/kernel.h> 45 #include <sys/malloc.h> 46 47 #include <vm/vm.h> 48 #include <vm/pmap.h> 49 #include <vm/vm_kern.h> 50 #include <vm/vm_extern.h> 51 52 #include <machine/bus.h> 53 54 /* Prototypes for all the bus_space structure functions */ 55 bs_protos(generic); 56 57 int 58 generic_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 59 bus_space_handle_t *bshp) 60 { 61 const struct pmap_devmap *pd; 62 vm_paddr_t startpa, endpa, pa, offset; 63 vm_offset_t va; 64 pt_entry_t *pte; 65 66 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 67 /* Device was statically mapped. */ 68 *bshp = pd->pd_va + (bpa - pd->pd_pa); 69 return (0); 70 } 71 72 endpa = round_page(bpa + size); 73 offset = bpa & PAGE_MASK; 74 startpa = trunc_page(bpa); 75 76 va = kmem_alloc_nofault(kernel_map, endpa - startpa); 77 if (va == 0) 78 return (ENOMEM); 79 80 *bshp = va + offset; 81 82 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 83 pmap_kenter(va, pa); 84 pte = vtopte(va); 85 if (!(flags & BUS_SPACE_MAP_CACHEABLE)) { 86 *pte &= ~L2_S_CACHE_MASK; 87 PTE_SYNC(pte); 88 } 89 } 90 91 return (0); 92 } 93 94 int 95 generic_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 96 bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap, 97 bus_space_handle_t *bshp) 98 { 99 100 panic("generic_bs_alloc(): not implemented"); 101 } 102 103 104 void 105 generic_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size) 106 { 107 vm_offset_t va, endva; 108 109 if (pmap_devmap_find_va((vm_offset_t)t, size) != NULL) { 110 /* Device was statically mapped; nothing to do. */ 111 return; 112 } 113 114 endva = round_page((vm_offset_t)t + size); 115 va = trunc_page((vm_offset_t)t); 116 117 while (va < endva) { 118 pmap_kremove(va); 119 va += PAGE_SIZE; 120 } 121 kmem_free(kernel_map, va, endva - va); 122 } 123 124 void 125 generic_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 126 { 127 128 panic("generic_bs_free(): not implemented"); 129 } 130 131 int 132 generic_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 133 bus_size_t size, bus_space_handle_t *nbshp) 134 { 135 136 *nbshp = bsh + offset; 137 return (0); 138 } 139 140 void 141 generic_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 142 bus_size_t len, int flags) 143 { 144 145 /* Nothing to do. */ 146 } 147