1 /* $NetBSD: obio_space.c,v 1.8 2002/09/27 15:36:00 provos Exp $ */ 2 3 /* 4 * Copyright (c) 2001 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 IQ80310 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 #include "iq80310reg.h" 50 51 /* Prototypes for all the bus_space structure functions */ 52 bs_protos(obio); 53 bs_protos(generic); 54 bs_protos(bs_notimpl); 55 56 /* 57 * The obio bus space tag. This is constant for all instances, so 58 * we never have to explicitly "create" it. 59 */ 60 struct bus_space obio_bs_tag = { 61 /* cookie */ 62 (void *) 0, 63 64 /* mapping/unmapping */ 65 obio_bs_map, 66 obio_bs_unmap, 67 obio_bs_subregion, 68 69 /* allocation/deallocation */ 70 obio_bs_alloc, 71 obio_bs_free, 72 73 /* get kernel virtual address */ 74 obio_bs_vaddr, 75 76 /* mmap */ 77 bs_notimpl_bs_mmap, 78 79 /* barrier */ 80 obio_bs_barrier, 81 82 /* read (single) */ 83 generic_bs_r_1, 84 bs_notimpl_bs_r_2, 85 generic_bs_r_4, 86 bs_notimpl_bs_r_8, 87 88 /* read multiple */ 89 generic_bs_rm_1, 90 bs_notimpl_bs_rm_2, 91 bs_notimpl_bs_rm_4, 92 bs_notimpl_bs_rm_8, 93 94 /* read region */ 95 generic_bs_rr_1, 96 bs_notimpl_bs_rr_2, 97 bs_notimpl_bs_rr_4, 98 bs_notimpl_bs_rr_8, 99 100 /* write (single) */ 101 generic_bs_w_1, 102 bs_notimpl_bs_w_2, 103 generic_bs_w_4, 104 bs_notimpl_bs_w_8, 105 106 /* write multiple */ 107 generic_bs_wm_1, 108 bs_notimpl_bs_wm_2, 109 bs_notimpl_bs_wm_4, 110 bs_notimpl_bs_wm_8, 111 112 /* write region */ 113 bs_notimpl_bs_wr_1, 114 bs_notimpl_bs_wr_2, 115 bs_notimpl_bs_wr_4, 116 bs_notimpl_bs_wr_8, 117 118 /* set multiple */ 119 bs_notimpl_bs_sm_1, 120 bs_notimpl_bs_sm_2, 121 bs_notimpl_bs_sm_4, 122 bs_notimpl_bs_sm_8, 123 124 /* set region */ 125 bs_notimpl_bs_sr_1, 126 bs_notimpl_bs_sr_2, 127 bs_notimpl_bs_sr_4, 128 bs_notimpl_bs_sr_8, 129 130 /* copy */ 131 bs_notimpl_bs_c_1, 132 bs_notimpl_bs_c_2, 133 bs_notimpl_bs_c_4, 134 bs_notimpl_bs_c_8, 135 }; 136 137 int 138 obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 139 bus_space_handle_t *bshp) 140 { 141 u_long startpa, endpa, pa; 142 vaddr_t va; 143 pt_entry_t *pte; 144 145 if (bpa > IQ80310_OBIO_BASE) { 146 147 /* 148 * IQ80310 on-board devices are mapped VA==PA. All addresses 149 * we're provided, therefore, don't need any additional mapping. 150 */ 151 *bshp = bpa; 152 153 } else { 154 155 /* 156 * Some devices actually lie outside the range above. 157 * Notably: flash. 158 */ 159 startpa = trunc_page(bpa); 160 endpa = round_page(bpa + size); 161 162 /* XXX use extent manager to check duplicate mapping */ 163 164 va = uvm_km_valloc(kernel_map, endpa - startpa); 165 if (! va) 166 return(ENOMEM); 167 168 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 169 170 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 171 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE); 172 pte = vtopte(va); 173 *pte &= ~L2_S_CACHE_MASK; 174 PTE_SYNC(pte); 175 } 176 pmap_update(pmap_kernel()); 177 178 } 179 180 return 0; 181 } 182 183 int 184 obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 185 bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap, 186 bus_space_handle_t *bshp) 187 { 188 189 panic("obio_bs_alloc(): not implemented"); 190 } 191 192 193 void 194 obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 195 { 196 197 /* Nothing to do. */ 198 /* XXX -- technically, if we alloc and map above, we should 199 * unmap and free here, but we bail on this for now. 200 */ 201 } 202 203 void 204 obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 205 { 206 207 panic("obio_bs_free(): not implemented"); 208 } 209 210 int 211 obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 212 bus_size_t size, bus_space_handle_t *nbshp) 213 { 214 215 *nbshp = bsh + offset; 216 return (0); 217 } 218 219 void * 220 obio_bs_vaddr(void *t, bus_space_handle_t bsh) 221 { 222 223 return ((void *)bsh); 224 } 225 226 void 227 obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 228 bus_size_t len, int flags) 229 { 230 231 /* Nothing to do. */ 232 } 233