ifpga_io.c revision 1.4
1 /* $NetBSD: ifpga_io.c,v 1.4 2002/10/06 17:13:58 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Causality Limited 5 * Copyright (c) 1997 Mark Brinicombe. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Mark Brinicombe 19 * for the NetBSD Project. 20 * 4. The name of the company nor the name of the author may be used to 21 * endorse or promote products derived from this software without specific 22 * prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * From arm/footbridge/footbridge_io.c 37 */ 38 39 /* 40 * bus_space I/O functions for IFPGA 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <machine/bus.h> 46 #include <uvm/uvm_extern.h> 47 48 #include <evbarm/ifpga/ifpgavar.h> 49 50 /* Proto types for all the bus_space structure functions */ 51 52 bs_protos(ifpga); 53 bs_protos(generic); 54 bs_protos(generic_armv4); 55 bs_protos(bs_notimpl); 56 bs_map_proto(ifpga_mem); 57 bs_unmap_proto(ifpga_mem); 58 59 /* Declare the ifpga bus space tag */ 60 61 struct bus_space ifpga_bs_tag = { 62 /* cookie */ 63 (void *) 0, /* Physical base address */ 64 65 /* mapping/unmapping */ 66 ifpga_bs_map, 67 ifpga_bs_unmap, 68 ifpga_bs_subregion, 69 70 /* allocation/deallocation */ 71 ifpga_bs_alloc, 72 ifpga_bs_free, 73 74 /* get kernel virtual address */ 75 ifpga_bs_vaddr, 76 77 /* mmap */ 78 bs_notimpl_bs_mmap, 79 80 /* barrier */ 81 ifpga_bs_barrier, 82 83 /* read (single) */ 84 generic_bs_r_1, 85 generic_armv4_bs_r_2, 86 generic_bs_r_4, 87 bs_notimpl_bs_r_8, 88 89 /* read multiple */ 90 generic_bs_rm_1, 91 generic_armv4_bs_rm_2, 92 generic_bs_rm_4, 93 bs_notimpl_bs_rm_8, 94 95 /* read region */ 96 bs_notimpl_bs_rr_1, 97 generic_armv4_bs_rr_2, 98 generic_bs_rr_4, 99 bs_notimpl_bs_rr_8, 100 101 /* write (single) */ 102 generic_bs_w_1, 103 generic_armv4_bs_w_2, 104 generic_bs_w_4, 105 bs_notimpl_bs_w_8, 106 107 /* write multiple */ 108 generic_bs_wm_1, 109 generic_armv4_bs_wm_2, 110 generic_bs_wm_4, 111 bs_notimpl_bs_wm_8, 112 113 /* write region */ 114 bs_notimpl_bs_wr_1, 115 generic_armv4_bs_wr_2, 116 generic_bs_wr_4, 117 bs_notimpl_bs_wr_8, 118 119 /* set multiple */ 120 bs_notimpl_bs_sm_1, 121 bs_notimpl_bs_sm_2, 122 bs_notimpl_bs_sm_4, 123 bs_notimpl_bs_sm_8, 124 125 /* set region */ 126 bs_notimpl_bs_sr_1, 127 generic_armv4_bs_sr_2, 128 bs_notimpl_bs_sr_4, 129 bs_notimpl_bs_sr_8, 130 131 /* copy */ 132 bs_notimpl_bs_c_1, 133 generic_armv4_bs_c_2, 134 bs_notimpl_bs_c_4, 135 bs_notimpl_bs_c_8, 136 }; 137 138 void ifpga_create_io_bs_tag(t, cookie) 139 struct bus_space *t; 140 void *cookie; 141 { 142 *t = ifpga_bs_tag; 143 t->bs_cookie = cookie; 144 } 145 146 void ifpga_create_mem_bs_tag(t, cookie) 147 struct bus_space *t; 148 void *cookie; 149 { 150 *t = ifpga_bs_tag; 151 t->bs_map = ifpga_mem_bs_map; 152 t->bs_unmap = ifpga_mem_bs_unmap; 153 t->bs_cookie = cookie; 154 } 155 156 /* bus space functions */ 157 158 int 159 ifpga_bs_map(t, bpa, size, cacheable, bshp) 160 void *t; 161 bus_addr_t bpa; 162 bus_size_t size; 163 int cacheable; 164 bus_space_handle_t *bshp; 165 { 166 /* The cookie is the base address for the I/O area */ 167 *bshp = bpa + (bus_addr_t)t; 168 return 0; 169 } 170 171 int 172 ifpga_mem_bs_map(t, bpa, size, cacheable, bshp) 173 void *t; 174 bus_addr_t bpa; 175 bus_size_t size; 176 int cacheable; 177 bus_space_handle_t *bshp; 178 { 179 bus_addr_t startpa, endpa; 180 vaddr_t va; 181 182 /* Round the allocation to page boundries */ 183 startpa = trunc_page(bpa); 184 endpa = round_page(bpa + size); 185 186 /* Get some VM. */ 187 va = uvm_km_valloc(kernel_map, endpa - startpa); 188 if (va == 0) 189 return ENOMEM; 190 191 /* Store the bus space handle */ 192 *bshp = va + (bpa & PGOFSET); 193 194 /* Now map the pages */ 195 /* The cookie is the physical base address for the I/O area */ 196 while (startpa < endpa) { 197 /* XXX pmap_kenter_pa maps pages cacheable -- not what 198 we want. */ 199 pmap_enter(pmap_kernel(), va, (bus_addr_t)t + startpa, 200 VM_PROT_READ | VM_PROT_WRITE, 0); 201 va += NBPG; 202 startpa += NBPG; 203 } 204 pmap_update(pmap_kernel()); 205 206 return 0; 207 } 208 209 int 210 ifpga_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable, 211 bpap, bshp) 212 void *t; 213 bus_addr_t rstart, rend; 214 bus_size_t size, alignment, boundary; 215 int cacheable; 216 bus_addr_t *bpap; 217 bus_space_handle_t *bshp; 218 { 219 panic("ifpga_alloc(): Help!"); 220 } 221 222 223 void 224 ifpga_bs_unmap(t, bsh, size) 225 void *t; 226 bus_space_handle_t bsh; 227 bus_size_t size; 228 { 229 /* Nothing to do for an io map. */ 230 } 231 232 void 233 ifpga_mem_bs_unmap(t, bsh, size) 234 void *t; 235 bus_space_handle_t bsh; 236 bus_size_t size; 237 { 238 vaddr_t startva, endva; 239 240 startva = trunc_page(bsh); 241 endva = round_page(bsh + size); 242 243 uvm_km_free(kernel_map, startva, endva - startva); 244 } 245 246 void 247 ifpga_bs_free(t, bsh, size) 248 void *t; 249 bus_space_handle_t bsh; 250 bus_size_t size; 251 { 252 253 panic("ifpga_free(): Help!"); 254 /* ifpga_bs_unmap() does all that we need to do. */ 255 /* ifpga_bs_unmap(t, bsh, size);*/ 256 } 257 258 int 259 ifpga_bs_subregion(t, bsh, offset, size, nbshp) 260 void *t; 261 bus_space_handle_t bsh; 262 bus_size_t offset, size; 263 bus_space_handle_t *nbshp; 264 { 265 266 *nbshp = bsh + (offset << ((int)t)); 267 return (0); 268 } 269 270 void * 271 ifpga_bs_vaddr(t, bsh) 272 void *t; 273 bus_space_handle_t bsh; 274 { 275 276 return ((void *)bsh); 277 } 278 279 void 280 ifpga_bs_barrier(t, bsh, offset, len, flags) 281 void *t; 282 bus_space_handle_t bsh; 283 bus_size_t offset, len; 284 int flags; 285 { 286 } 287
Indexes created Wed Oct 22 00:09:40 GMT 2025