obio_space.c revision 1.2
1 /* $NetBSD: obio_space.c,v 1.2 2003/06/15 18:43:49 thorpej 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 /* 39 * bus_space functions for ADI BRH on-board devices 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 45 #include <uvm/uvm_extern.h> 46 47 #include <machine/bus.h> 48 49 /* Prototypes for all the bus_space structure functions */ 50 bs_protos(obio); 51 bs_protos(generic); 52 bs_protos(generic_armv4); 53 bs_protos(bs_notimpl); 54 55 /* 56 * The obio bus space tag. This is constant for all instances, so 57 * we never have to explicitly "create" it. 58 */ 59 struct bus_space obio_bs_tag = { 60 /* cookie */ 61 (void *) 0, 62 63 /* mapping/unmapping */ 64 obio_bs_map, 65 obio_bs_unmap, 66 obio_bs_subregion, 67 68 /* allocation/deallocation */ 69 obio_bs_alloc, 70 obio_bs_free, 71 72 /* get kernel virtual address */ 73 obio_bs_vaddr, 74 75 /* mmap */ 76 bs_notimpl_bs_mmap, 77 78 /* barrier */ 79 obio_bs_barrier, 80 81 /* read (single) */ 82 generic_bs_r_1, 83 generic_armv4_bs_r_2, 84 generic_bs_r_4, 85 bs_notimpl_bs_r_8, 86 87 /* read multiple */ 88 generic_bs_rm_1, 89 bs_notimpl_bs_rm_2, 90 bs_notimpl_bs_rm_4, 91 bs_notimpl_bs_rm_8, 92 93 /* read region */ 94 generic_bs_rr_1, 95 bs_notimpl_bs_rr_2, 96 bs_notimpl_bs_rr_4, 97 bs_notimpl_bs_rr_8, 98 99 /* write (single) */ 100 generic_bs_w_1, 101 generic_armv4_bs_w_2, 102 generic_bs_w_4, 103 bs_notimpl_bs_w_8, 104 105 /* write multiple */ 106 generic_bs_wm_1, 107 bs_notimpl_bs_wm_2, 108 bs_notimpl_bs_wm_4, 109 bs_notimpl_bs_wm_8, 110 111 /* write region */ 112 bs_notimpl_bs_wr_1, 113 bs_notimpl_bs_wr_2, 114 bs_notimpl_bs_wr_4, 115 bs_notimpl_bs_wr_8, 116 117 /* set multiple */ 118 bs_notimpl_bs_sm_1, 119 bs_notimpl_bs_sm_2, 120 bs_notimpl_bs_sm_4, 121 bs_notimpl_bs_sm_8, 122 123 /* set region */ 124 bs_notimpl_bs_sr_1, 125 bs_notimpl_bs_sr_2, 126 bs_notimpl_bs_sr_4, 127 bs_notimpl_bs_sr_8, 128 129 /* copy */ 130 bs_notimpl_bs_c_1, 131 bs_notimpl_bs_c_2, 132 bs_notimpl_bs_c_4, 133 bs_notimpl_bs_c_8, 134 }; 135 136 int 137 obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 138 bus_space_handle_t *bshp) 139 { 140 const struct pmap_devmap *pd; 141 paddr_t startpa, endpa, pa, offset; 142 vaddr_t va; 143 pt_entry_t *pte; 144 145 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 146 /* Device was statically mapped. */ 147 *bshp = pd->pd_va + (bpa - pd->pd_pa); 148 return (0); 149 } 150 151 endpa = round_page(bpa + size); 152 offset = bpa & PAGE_MASK; 153 startpa = trunc_page(bpa); 154 155 va = uvm_km_valloc(kernel_map, endpa - startpa); 156 if (va == 0) 157 return ENOMEM; 158 159 *bshp = va + offset; 160 161 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 162 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE); 163 pte = vtopte(va); 164 *pte &= ~L2_S_CACHE_MASK; 165 PTE_SYNC(pte); 166 } 167 pmap_update(pmap_kernel()); 168 169 return (0); 170 } 171 172 int 173 obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 174 bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap, 175 bus_space_handle_t *bshp) 176 { 177 178 panic("obio_bs_alloc(): not implemented\n"); 179 } 180 181 182 void 183 obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 184 { 185 vaddr_t va, endva; 186 187 if (pmap_devmap_find_va(bsh, size) != NULL) { 188 /* Device was statically mapped; nothing to do. */ 189 return; 190 } 191 192 endva = round_page(bsh + size); 193 va = trunc_page(bsh); 194 195 pmap_kremove(va, endva - va); 196 uvm_km_free(kernel_map, va, endva - va); 197 } 198 199 void 200 obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 201 { 202 203 panic("obio_bs_free(): not implemented\n"); 204 } 205 206 int 207 obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 208 bus_size_t size, bus_space_handle_t *nbshp) 209 { 210 211 *nbshp = bsh + offset; 212 return (0); 213 } 214 215 void * 216 obio_bs_vaddr(void *t, bus_space_handle_t bsh) 217 { 218 219 return ((void *)bsh); 220 } 221 222 void 223 obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 224 bus_size_t len, int flags) 225 { 226 227 /* Nothing to do. */ 228 } 229
Indexes created Tue Sep 30 11:09:46 GMT 2025