ifpga_io.c revision 1.5.2.2
1 /* $NetBSD: ifpga_io.c,v 1.5.2.2 2004/09/18 14:33:45 skrll 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/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: ifpga_io.c,v 1.5.2.2 2004/09/18 14:33:45 skrll Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <machine/bus.h> 49 #include <uvm/uvm_extern.h> 50 51 #include <evbarm/ifpga/ifpgavar.h> 52 53 /* Proto types for all the bus_space structure functions */ 54 55 bs_protos(ifpga); 56 bs_protos(generic); 57 bs_protos(generic_armv4); 58 bs_protos(bs_notimpl); 59 bs_map_proto(ifpga_mem); 60 bs_unmap_proto(ifpga_mem); 61 62 /* Declare the ifpga bus space tag */ 63 64 struct bus_space ifpga_bs_tag = { 65 /* cookie */ 66 (void *) 0, /* Physical base address */ 67 68 /* mapping/unmapping */ 69 ifpga_bs_map, 70 ifpga_bs_unmap, 71 ifpga_bs_subregion, 72 73 /* allocation/deallocation */ 74 ifpga_bs_alloc, 75 ifpga_bs_free, 76 77 /* get kernel virtual address */ 78 ifpga_bs_vaddr, 79 80 /* mmap */ 81 bs_notimpl_bs_mmap, 82 83 /* barrier */ 84 ifpga_bs_barrier, 85 86 /* read (single) */ 87 generic_bs_r_1, 88 generic_armv4_bs_r_2, 89 generic_bs_r_4, 90 bs_notimpl_bs_r_8, 91 92 /* read multiple */ 93 generic_bs_rm_1, 94 generic_armv4_bs_rm_2, 95 generic_bs_rm_4, 96 bs_notimpl_bs_rm_8, 97 98 /* read region */ 99 bs_notimpl_bs_rr_1, 100 generic_armv4_bs_rr_2, 101 generic_bs_rr_4, 102 bs_notimpl_bs_rr_8, 103 104 /* write (single) */ 105 generic_bs_w_1, 106 generic_armv4_bs_w_2, 107 generic_bs_w_4, 108 bs_notimpl_bs_w_8, 109 110 /* write multiple */ 111 generic_bs_wm_1, 112 generic_armv4_bs_wm_2, 113 generic_bs_wm_4, 114 bs_notimpl_bs_wm_8, 115 116 /* write region */ 117 bs_notimpl_bs_wr_1, 118 generic_armv4_bs_wr_2, 119 generic_bs_wr_4, 120 bs_notimpl_bs_wr_8, 121 122 /* set multiple */ 123 bs_notimpl_bs_sm_1, 124 bs_notimpl_bs_sm_2, 125 bs_notimpl_bs_sm_4, 126 bs_notimpl_bs_sm_8, 127 128 /* set region */ 129 bs_notimpl_bs_sr_1, 130 generic_armv4_bs_sr_2, 131 bs_notimpl_bs_sr_4, 132 bs_notimpl_bs_sr_8, 133 134 /* copy */ 135 bs_notimpl_bs_c_1, 136 generic_armv4_bs_c_2, 137 bs_notimpl_bs_c_4, 138 bs_notimpl_bs_c_8, 139 }; 140 141 void ifpga_create_io_bs_tag(t, cookie) 142 struct bus_space *t; 143 void *cookie; 144 { 145 *t = ifpga_bs_tag; 146 t->bs_cookie = cookie; 147 } 148 149 void ifpga_create_mem_bs_tag(t, cookie) 150 struct bus_space *t; 151 void *cookie; 152 { 153 *t = ifpga_bs_tag; 154 t->bs_map = ifpga_mem_bs_map; 155 t->bs_unmap = ifpga_mem_bs_unmap; 156 t->bs_cookie = cookie; 157 } 158 159 /* bus space functions */ 160 161 int 162 ifpga_bs_map(t, bpa, size, cacheable, bshp) 163 void *t; 164 bus_addr_t bpa; 165 bus_size_t size; 166 int cacheable; 167 bus_space_handle_t *bshp; 168 { 169 /* The cookie is the base address for the I/O area */ 170 *bshp = bpa + (bus_addr_t)t; 171 return 0; 172 } 173 174 int 175 ifpga_mem_bs_map(t, bpa, size, cacheable, bshp) 176 void *t; 177 bus_addr_t bpa; 178 bus_size_t size; 179 int cacheable; 180 bus_space_handle_t *bshp; 181 { 182 bus_addr_t startpa, endpa; 183 vaddr_t va; 184 185 /* Round the allocation to page boundries */ 186 startpa = trunc_page(bpa); 187 endpa = round_page(bpa + size); 188 189 /* Get some VM. */ 190 va = uvm_km_valloc(kernel_map, endpa - startpa); 191 if (va == 0) 192 return ENOMEM; 193 194 /* Store the bus space handle */ 195 *bshp = va + (bpa & PGOFSET); 196 197 /* Now map the pages */ 198 /* The cookie is the physical base address for the I/O area */ 199 while (startpa < endpa) { 200 /* XXX pmap_kenter_pa maps pages cacheable -- not what 201 we want. */ 202 pmap_enter(pmap_kernel(), va, (bus_addr_t)t + startpa, 203 VM_PROT_READ | VM_PROT_WRITE, 0); 204 va += PAGE_SIZE; 205 startpa += PAGE_SIZE; 206 } 207 pmap_update(pmap_kernel()); 208 209 return 0; 210 } 211 212 int 213 ifpga_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable, 214 bpap, bshp) 215 void *t; 216 bus_addr_t rstart, rend; 217 bus_size_t size, alignment, boundary; 218 int cacheable; 219 bus_addr_t *bpap; 220 bus_space_handle_t *bshp; 221 { 222 panic("ifpga_alloc(): Help!"); 223 } 224 225 226 void 227 ifpga_bs_unmap(t, bsh, size) 228 void *t; 229 bus_space_handle_t bsh; 230 bus_size_t size; 231 { 232 /* Nothing to do for an io map. */ 233 } 234 235 void 236 ifpga_mem_bs_unmap(t, bsh, size) 237 void *t; 238 bus_space_handle_t bsh; 239 bus_size_t size; 240 { 241 vaddr_t startva, endva; 242 243 startva = trunc_page(bsh); 244 endva = round_page(bsh + size); 245 246 uvm_km_free(kernel_map, startva, endva - startva); 247 } 248 249 void 250 ifpga_bs_free(t, bsh, size) 251 void *t; 252 bus_space_handle_t bsh; 253 bus_size_t size; 254 { 255 256 panic("ifpga_free(): Help!"); 257 /* ifpga_bs_unmap() does all that we need to do. */ 258 /* ifpga_bs_unmap(t, bsh, size);*/ 259 } 260 261 int 262 ifpga_bs_subregion(t, bsh, offset, size, nbshp) 263 void *t; 264 bus_space_handle_t bsh; 265 bus_size_t offset, size; 266 bus_space_handle_t *nbshp; 267 { 268 269 *nbshp = bsh + (offset << ((int)t)); 270 return (0); 271 } 272 273 void * 274 ifpga_bs_vaddr(t, bsh) 275 void *t; 276 bus_space_handle_t bsh; 277 { 278 279 return ((void *)bsh); 280 } 281 282 void 283 ifpga_bs_barrier(t, bsh, offset, len, flags) 284 void *t; 285 bus_space_handle_t bsh; 286 bus_size_t offset, len; 287 int flags; 288 { 289 } 290
Indexes created Mon Oct 20 11:09:49 GMT 2025