1 /* $Id: imx_space.c,v 1.2 2010/11/13 05:00:31 bsh Exp $ */ 2 3 /* derived from: */ 4 /* $NetBSD: imx_space.c,v 1.2 2010/11/13 05:00:31 bsh Exp $ */ 5 6 /* 7 * Copyright (c) 2001, 2002 Wasabi Systems, Inc. 8 * All rights reserved. 9 * 10 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed for the NetBSD Project by 23 * Wasabi Systems, Inc. 24 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 25 * or promote products derived from this software without specific prior 26 * written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 /* 41 * Copyright (c) 1997 Mark Brinicombe. 42 * Copyright (c) 1997 Causality Limited. 43 * All rights reserved. 44 * 45 * This code is derived from software contributed to The NetBSD Foundation 46 * by Ichiro FUKUHARA. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by Mark Brinicombe. 59 * 4. The name of the company nor the name of the author may be used to 60 * endorse or promote products derived from this software without specific 61 * prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 64 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 65 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 66 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 67 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 68 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 69 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 */ 75 76 /* 77 * bus_space(9) support for Freescale iMX31 processor 78 */ 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <uvm/uvm_extern.h> 83 #include <machine/bus.h> 84 85 bs_protos(imx); 86 bs_protos(generic); 87 bs_protos(generic_armv4); 88 bs_protos(bs_notimpl); 89 90 struct bus_space imx_bs_tag = { 91 /* cookie */ 92 (void *) 0, 93 94 /* mapping/unmapping */ 95 imx_bs_map, 96 imx_bs_unmap, 97 imx_bs_subregion, 98 99 /* allocation/deallocation */ 100 imx_bs_alloc, /* not implemented */ 101 imx_bs_free, /* not implemented */ 102 103 /* get kernel virtual address */ 104 imx_bs_vaddr, 105 106 /* mmap */ 107 bs_notimpl_bs_mmap, 108 109 /* barrier */ 110 imx_bs_barrier, 111 112 /* read (single) */ 113 generic_bs_r_1, 114 generic_armv4_bs_r_2, 115 generic_bs_r_4, 116 bs_notimpl_bs_r_8, 117 118 /* read multiple */ 119 generic_bs_rm_1, 120 generic_armv4_bs_rm_2, 121 generic_bs_rm_4, 122 bs_notimpl_bs_rm_8, 123 124 /* read region */ 125 generic_bs_rr_1, 126 generic_armv4_bs_rr_2, 127 generic_bs_rr_4, 128 bs_notimpl_bs_rr_8, 129 130 /* write (single) */ 131 generic_bs_w_1, 132 generic_armv4_bs_w_2, 133 generic_bs_w_4, 134 bs_notimpl_bs_w_8, 135 136 /* write multiple */ 137 generic_bs_wm_1, 138 generic_armv4_bs_wm_2, 139 generic_bs_wm_4, 140 bs_notimpl_bs_wm_8, 141 142 /* write region */ 143 generic_bs_wr_1, 144 generic_armv4_bs_wr_2, 145 generic_bs_wr_4, 146 bs_notimpl_bs_wr_8, 147 148 /* set multiple */ 149 bs_notimpl_bs_sm_1, 150 bs_notimpl_bs_sm_2, 151 bs_notimpl_bs_sm_4, 152 bs_notimpl_bs_sm_8, 153 154 /* set region */ 155 generic_bs_sr_1, 156 generic_armv4_bs_sr_2, 157 bs_notimpl_bs_sr_4, 158 bs_notimpl_bs_sr_8, 159 160 /* copy */ 161 bs_notimpl_bs_c_1, 162 generic_armv4_bs_c_2, 163 bs_notimpl_bs_c_4, 164 bs_notimpl_bs_c_8, 165 }; 166 167 int 168 imx_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 169 int flag, bus_space_handle_t *bshp) 170 { 171 u_long startpa, endpa, pa; 172 vaddr_t va; 173 pt_entry_t *pte; 174 const struct pmap_devmap *pd; 175 176 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 177 /* Device was statically mapped. */ 178 *bshp = pd->pd_va + (bpa - pd->pd_pa); 179 return 0; 180 } 181 182 startpa = trunc_page(bpa); 183 endpa = round_page(bpa + size); 184 185 /* XXX use extent manager to check duplicate mapping */ 186 187 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 188 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 189 if (! va) 190 return(ENOMEM); 191 192 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 193 194 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 195 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, 0); 196 if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) { 197 pte = vtopte(va); 198 *pte &= ~L2_S_CACHE_MASK; 199 PTE_SYNC(pte); 200 /* XXX: pmap_kenter_pa() also does PTE_SYNC(). a bit of 201 * waste. 202 */ 203 } 204 } 205 pmap_update(pmap_kernel()); 206 207 return(0); 208 } 209 210 void 211 imx_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 212 { 213 vaddr_t va; 214 vsize_t sz; 215 216 if (pmap_devmap_find_va(bsh, size) != NULL) { 217 /* Device was statically mapped; nothing to do. */ 218 return; 219 } 220 221 va = trunc_page(bsh); 222 sz = round_page(bsh + size) - va; 223 224 pmap_kremove(va, sz); 225 pmap_update(pmap_kernel()); 226 uvm_km_free(kernel_map, va, sz, UVM_KMF_VAONLY); 227 } 228 229 230 int 231 imx_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 232 bus_size_t size, bus_space_handle_t *nbshp) 233 { 234 235 *nbshp = bsh + offset; 236 return (0); 237 } 238 239 void 240 imx_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 241 bus_size_t len, int flags) 242 { 243 244 /* Nothing to do. */ 245 } 246 247 void * 248 imx_bs_vaddr(void *t, bus_space_handle_t bsh) 249 { 250 251 return ((void *)bsh); 252 } 253 254 255 int 256 imx_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 257 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 258 bus_addr_t *bpap, bus_space_handle_t *bshp) 259 { 260 261 panic("imx_io_bs_alloc(): not implemented\n"); 262 } 263 264 void 265 imx_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 266 { 267 268 panic("imx_io_bs_free(): not implemented\n"); 269 } 270 271 272