ifpga_io.c revision 1.1.4.3
1 /* $NetBSD: ifpga_io.c,v 1.1.4.3 2002/06/23 17:35:39 jdolecek 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 /* Proto types for all the bus_space structure functions */ 49 50 bs_protos(ifpga); 51 bs_protos(generic); 52 bs_protos(generic_armv4); 53 bs_protos(bs_notimpl); 54 bs_map_proto(ifpga_mem); 55 bs_unmap_proto(ifpga_mem); 56 57 /* Declare the ifpga bus space tag */ 58 59 struct bus_space ifpga_bs_tag = { 60 /* cookie */ 61 (void *) 0, /* Physical base address */ 62 63 /* mapping/unmapping */ 64 ifpga_bs_map, 65 ifpga_bs_unmap, 66 ifpga_bs_subregion, 67 68 /* allocation/deallocation */ 69 ifpga_bs_alloc, 70 ifpga_bs_free, 71 72 /* get kernel virtual address */ 73 ifpga_bs_vaddr, 74 75 /* mmap */ 76 bs_notimpl_bs_mmap, 77 78 /* barrier */ 79 ifpga_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 generic_armv4_bs_rm_2, 90 generic_bs_rm_4, 91 bs_notimpl_bs_rm_8, 92 93 /* read region */ 94 bs_notimpl_bs_rr_1, 95 generic_armv4_bs_rr_2, 96 generic_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 generic_armv4_bs_wm_2, 108 generic_bs_wm_4, 109 bs_notimpl_bs_wm_8, 110 111 /* write region */ 112 bs_notimpl_bs_wr_1, 113 generic_armv4_bs_wr_2, 114 generic_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 generic_armv4_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 generic_armv4_bs_c_2, 132 bs_notimpl_bs_c_4, 133 bs_notimpl_bs_c_8, 134 }; 135 136 void ifpga_create_io_bs_tag(t, cookie) 137 struct bus_space *t; 138 void *cookie; 139 { 140 *t = ifpga_bs_tag; 141 t->bs_cookie = cookie; 142 } 143 144 void ifpga_create_mem_bs_tag(t, cookie) 145 struct bus_space *t; 146 void *cookie; 147 { 148 *t = ifpga_bs_tag; 149 t->bs_map = ifpga_mem_bs_map; 150 t->bs_unmap = ifpga_mem_bs_unmap; 151 t->bs_cookie = cookie; 152 } 153 154 /* bus space functions */ 155 156 int 157 ifpga_bs_map(t, bpa, size, cacheable, bshp) 158 void *t; 159 bus_addr_t bpa; 160 bus_size_t size; 161 int cacheable; 162 bus_space_handle_t *bshp; 163 { 164 /* The cookie is the base address for the I/O area */ 165 *bshp = bpa + (bus_addr_t)t; 166 return 0; 167 } 168 169 int 170 ifpga_mem_bs_map(t, bpa, size, cacheable, bshp) 171 void *t; 172 bus_addr_t bpa; 173 bus_size_t size; 174 int cacheable; 175 bus_space_handle_t *bshp; 176 { 177 bus_addr_t startpa, endpa; 178 vaddr_t va; 179 180 /* Round the allocation to page boundries */ 181 startpa = trunc_page(bpa); 182 endpa = round_page(bpa + size); 183 184 /* Get some VM. */ 185 va = uvm_km_valloc(kernel_map, endpa - startpa); 186 if (va == 0) 187 return ENOMEM; 188 189 /* Store the bus space handle */ 190 *bshp = va + (bpa & PGOFSET); 191 192 /* Now map the pages */ 193 /* The cookie is the physical base address for the I/O area */ 194 while (startpa < endpa) { 195 /* XXX pmap_kenter_pa maps pages cacheable -- not what 196 we want. */ 197 pmap_enter(pmap_kernel(), va, (bus_addr_t)t + startpa, 198 VM_PROT_READ | VM_PROT_WRITE, 0); 199 va += NBPG; 200 startpa += NBPG; 201 } 202 pmap_update(pmap_kernel()); 203 204 return 0; 205 } 206 207 int 208 ifpga_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable, 209 bpap, bshp) 210 void *t; 211 bus_addr_t rstart, rend; 212 bus_size_t size, alignment, boundary; 213 int cacheable; 214 bus_addr_t *bpap; 215 bus_space_handle_t *bshp; 216 { 217 panic("ifpga_alloc(): Help!\n"); 218 } 219 220 221 void 222 ifpga_bs_unmap(t, bsh, size) 223 void *t; 224 bus_space_handle_t bsh; 225 bus_size_t size; 226 { 227 /* Nothing to do for an io map. */ 228 } 229 230 void 231 ifpga_mem_bs_unmap(t, bsh, size) 232 void *t; 233 bus_space_handle_t bsh; 234 bus_size_t size; 235 { 236 vaddr_t startva, endva; 237 238 startva = trunc_page(bsh); 239 endva = round_page(bsh + size); 240 241 uvm_km_free(kernel_map, startva, endva - startva); 242 } 243 244 void 245 ifpga_bs_free(t, bsh, size) 246 void *t; 247 bus_space_handle_t bsh; 248 bus_size_t size; 249 { 250 251 panic("ifpga_free(): Help!\n"); 252 /* ifpga_bs_unmap() does all that we need to do. */ 253 /* ifpga_bs_unmap(t, bsh, size);*/ 254 } 255 256 int 257 ifpga_bs_subregion(t, bsh, offset, size, nbshp) 258 void *t; 259 bus_space_handle_t bsh; 260 bus_size_t offset, size; 261 bus_space_handle_t *nbshp; 262 { 263 264 *nbshp = bsh + (offset << ((int)t)); 265 return (0); 266 } 267 268 void * 269 ifpga_bs_vaddr(t, bsh) 270 void *t; 271 bus_space_handle_t bsh; 272 { 273 274 return ((void *)bsh); 275 } 276 277 void 278 ifpga_bs_barrier(t, bsh, offset, len, flags) 279 void *t; 280 bus_space_handle_t bsh; 281 bus_size_t offset, len; 282 int flags; 283 { 284 } 285
Indexes created Mon Oct 20 20:10:13 GMT 2025